Sales Engagement & Outreach
S

SalesStack

SalesStack is a multi channel outbound platform that bundles the lead database, the mailboxes, the phone system and the landing pages into one subscription, aimed at teams that would otherwise assemble four tools.

The pipeline side starts with a lead finder searching a claimed 700 million record database across more than forty filters, with domain search, phone number search and social media audience search alongside, and buyer intent data available on request. Cold email runs from rotating mailboxes, five on the entry tier rising to a hundred, with campaign generation, split testing, a flow test step and a template library. Text messaging, WhatsApp and an artificial intelligence calling agent extend the same sequences into other channels, with the vendor's own body copy also naming the professional network and a microblogging platform as targets.

The inbound side is a second product in the same subscription: a landing page builder with a template library, triggered popups, sticky bars, custom form building, server side split testing and hosting on a custom domain. Calendars handle booking with round robin routing, meeting polls and booking on behalf of colleagues. Calls and tasks, lead scoring, team management and workflow automation sit across both halves.

A managed service runs alongside the software, with the vendor co creating campaigns and offering to reach more than a hundred thousand prospects a month on a customer's behalf.

Four free tools are published outside the paywall: a mailbox calculator sizing how many inboxes a given send volume needs, a sender authentication record checker, an addressable market calculator and an address verifier.

One naming point governs any future lookup. The roster lists this vendor as SendBuzz at sendbuzz.io. That domain now resolves to salesstack.com, which carries the canonical tag, the current copyright and the login. The rebrand is incomplete: the image store, the help documentation, the contact finder and the demonstration scheduler all still run on SendBuzz subdomains, the promotional strip at the top of every page advertises a SendBuzz affiliate programme, and a navigation item still reads SendBuzz for startups. Both names should be treated as the same product.

Last VerifiedAugust 24, 2026
Compare SalesStack with other vendors
Founded
Headquarters
Categories
sales-engagement, dialers-and-voice, data-and-enrichment
Assessment

Capability Axes

AI Capability
AI CentralityAI CentralityWhether AI is the product or a feature veneer. The removal test: peel the AI label off, and does anything sellable remain?
BB on AI CentralityAI carries a core workflow, with real product surface that is not AI. The vendor is specific about which parts are model driven.
Vendor Published

Model capability runs through eight named features and is tiered as a differentiator, which is the test of whether a vendor means it.

What is metered or gated: campaign generation is limited on the entry tier and unlimited above it, the lead finder ships in two named grades across tiers, and advanced model driven mailbox warm up appears only at the top tier. A vendor that charges differently for model capability at different tiers is treating it as substance rather than decoration.

What is present: a voice calling agent that books meetings, conversational text messaging, generated campaign copy, a copy writer for cold email, a form builder, generated content and imagery for landing pages, call summary and note creation, and lead scoring.

What keeps this out of the top band is the platform beneath. A lead database, rotating mailboxes, a dialer, a calendar, forms and a landing page builder are conventional software, and they constitute most of what the subscription buys. Strip the model layer out and a customer still has a working outbound stack with a 700 million record database attached.

The honest reading is a competent multi channel platform with a broad model layer laid across it, monetised through tiering rather than through consumption.

Ask what the two grades of lead finder actually differ on.

Autonomy and Oversight ModelAutonomy and Oversight ModelWhat the system does without a human. Draft for review, auto send, or fully agentic, and what contains a bad run.
CC on Autonomy and Oversight ModelAutonomy is claimed or implied with the oversight model asserted rather than documented. Buyers cannot tell from public sources what runs unsupervised.
Vendor Published

One genuine pre send control exists and the autonomous channels have none described.

The control worth crediting is flow test, listed as a capability on every tier. A mechanism for running a sequence through a test pass before it reaches real recipients is exactly the check that catches a broken merge field or a misrouted branch, and most vendors in this index do not offer one. Split testing runs unlimited alongside it, and workflow automation is offered in basic and advanced forms with custom triggers.

Team management provides performance visibility, and lead scoring prioritises which prospects are worked, both of which are configuration rather than oversight.

What has no described checkpoint is the part that acts without a person. A voice calling agent holds conversations with prospects and books meetings. Conversational text messaging replies to prospects. Campaign copy is generated. Two passes located no approval gate before generated copy sends, no human review step in the calling flow, no audit trail of what the agent said or sent, and no administrative permission model governing who may deploy an agent.

A flow test protects against a broken sequence. It does not protect against a fluent one saying the wrong thing.

Ask whether a human reviews generated copy and what the calling agent is prevented from saying.

AI Disclosure and Model TransparencyAI Disclosure and Model TransparencyWhat models power the product, whether AI generated outreach discloses itself, and whether scoring and routing logic is explainable.
DD on AI Disclosure and Model TransparencyNo public statement of what models are used, how outputs are produced, or whether recipients are told they are talking to software.
Vendor Published

Eight model features across four channels and no technology named behind any of them.

The pricing table meters generated campaigns as limited or unlimited depending on tier, and gates advanced model driven warm up to the top plan, so the vendor is charging differently for model capability at different price points. Two passes across the pricing page, the feature navigation, the industry pages and the multi channel page located no model provider, no model name, no version, no statement of what customer or prospect content is transmitted, no training or retention position and no evaluation or accuracy measure for any of it.

The voice agent is the capability where the gap matters most. A synthetic voice holds a conversation with a prospect and books a meeting, which means audio of a real person's replies is processed and a recording is stored. Whose infrastructure handles that is unstated.

The healthcare positioning sharpens it further. The vendor markets calling into that sector and lists a compliance row in its own pricing table, which would place the model processing of patient conversations inside a regulated perimeter, and the technology performing it is undisclosed.

Nothing supports quality either: no accuracy figure, no error rate and no statement of what happens when the agent misunderstands.

Ask which provider runs the voice agent and where call audio is processed.

Operational and Outcome EvidenceOperational and Outcome EvidenceMeasured outcomes with a stated basis: replies, meetings, pipeline, win rates. Logos are not evidence and prestige is not measurement.
DD on Operational and Outcome EvidenceNo outcome evidence published beyond assertion, on a product sold on its results.
Vendor Published

A rebrand has reset whatever evidence existed, and there was little to begin with.

Two passes across the current site, its pricing page, its feature pages and its industry pages located no named customer, no logo, no testimonial, no case study, no review and no outcome figure of any kind. Nothing on any vendor surface identifies a company that uses this product.

The independent record attaches to the previous name and is thin and stale. The profile on the principal enterprise review platform has gone unmanaged for over a year and now displays a reclaim prompt inviting anyone who works there to take it back. A second directory carries four reviews. A professional network page shows 130 followers.

The rebrand compounds it rather than helping. Whatever recognition the old name accumulated does not transfer to a buyer searching the new one, and the new name has no independent record at all.

One figure appears and it is a capacity claim rather than a result: the managed service offers to reach more than a hundred thousand prospects monthly. That describes what the vendor will send, not what it produced.

For a platform selling a lead database, four regulated channels and a managed service, a buyer has nothing to check.

Ask for three customer references with meetings booked and reply rates.

Compliance and Risk
Outreach Compliance PostureOutreach Compliance PostureHow the product handles regulated outreach: consent, DNC scrubbing, opt out mechanics, caller ID conduct, and the public enforcement record.
DD on Outreach Compliance PostureSilence on outreach compliance from a product whose function is regulated outreach, or a public enforcement and litigation record the vendor does not acknowledge.
Vendor Published

Four regulated channels, and the one compliance claim on the site is misspelled twice.

The channels are cold email at scale from rotating mailboxes, text messaging, a voice calling agent, and a messaging platform, with the vendor's own copy also naming two social networks as targets. Each carries its own consent regime and each is governed differently.

Two passes located no unsubscribe handling or propagation, no suppression list, no consent basis for any channel, no do not call screening, no calling hour restriction, no message frequency position and no jurisdictional guidance anywhere on the site.

The healthcare claim is the finding. The vendor lists a compliance row in its own pricing comparison table for the phone system, and markets the capability in its site navigation, and in both places the health privacy regulation is rendered as HIPPA and the word compliant is rendered as complaint. Misspelling the statute and the claim, in the pricing table where a buyer evaluates it and in the navigation where a prospect finds it, is a signal about how much scrutiny the claim received. An automated voice agent calling patients sits squarely inside that regulation, and telephone consumer rules apply to the same calls regardless.

The vendor does publish sender authentication guidance and a record checker, which is compliance adjacent work on the email channel and is credited on deliverability.

Ask what the compliance row in the pricing table actually covers and who assessed it.

Data Privacy PostureData Privacy PostureGDPR and CCPA posture: lawful basis, data subject rights handling, DPA availability, subprocessor disclosure.
DD on Data Privacy PostureNothing a buyer can check: no DPA located, no lawful basis stated, no privacy documentation beyond boilerplate, on a product that processes personal data at scale.
Vendor Published

A privacy policy and terms are published, and everything a review would ask for beyond them is absent.

Both documents are linked in the footer of every page, which puts this ahead of several records built this week where nothing existed. Neither was opened in this pass, so the grade rests on what is enumerably missing rather than on their contents, and a buyer should read them.

What two passes could not locate anywhere: a data processing agreement, a subprocessor list, a retention schedule, a deletion commitment, a residency statement, a rights request process, a named privacy contact and any reference to a data protection regime.

The holdings make those absences material. This platform ships a claimed 700 million record lead database, stores unlimited call recordings on every tier, holds two way text message threads, hosts landing pages capturing form submissions on customer domains, and offers social media audience search as a discovery method. That is a substantial accumulation of personal data about people who have no relationship with the vendor, alongside customer data.

The healthcare positioning raises the stakes again, since call recordings of patient conversations would attract specific handling obligations that no published document addresses.

Ask for a processing agreement and the retention period for call recordings.

Data Licensing and ProvenanceData Licensing and ProvenanceWhere the data comes from and on what legal footing: licensed, contributed, public record, or scraped, and who stands behind the answer.
DD on Data Licensing and ProvenanceNo public account of where the data originates, or public evidence (scraping disputes, platform enforcement) that contradicts the vendor’s silence.
Vendor Published

Seven hundred million records, three search methods, and no origin stated for any of it.

The database is a headline row in the pricing comparison table, available on every tier, searchable through more than forty filters. Alongside it sit three named discovery methods: domain search, phone number search and social media audience search. Buyer intent data is offered on request across all three tiers.

Two passes located no upstream supplier, no licensing arrangement, no collection method, no consent basis, no verification claim, no accuracy figure and no refresh cadence for any part of it.

Social media audience search is the item that needs answering first. Building a searchable audience from social platforms means either a licensed data arrangement with those platforms or collection they have not authorised, and the vendor names neither. Phone number search sits beside it, and the phone numbers feed a dialer and a text messaging channel where consent obligations are strictest.

The intent data offer is unusual in being priced on request rather than included, which suggests it is resold from a third party, and no such party is named.

A buyer inherits whatever the collection turns out to be, since the records land in their campaigns and the calls leave from their numbers.

Ask where the 700 million records come from and who supplies the intent data.

Platform Terms ExposurePlatform Terms ExposureWhether the product operates inside the terms of the platforms it touches, and the restriction risk a buyer inherits when it does not.
DD on Platform Terms ExposureThe method visibly violates platform terms (headless automation of a prohibiting platform), or the vendor’s account restriction record is public and unacknowledged.
Vendor Published

Three platforms the vendor does not own appear in its own copy, and none carries a stated basis.

The multi channel page states that a campaign can target an audience on the professional network and on a microblogging platform alongside email, text and telephone. A messaging platform appears as a supported channel for delivering messages with custom triggers. Social media audience search is offered as a lead discovery method.

Each of those three carries terms that ordinarily prohibit exactly what is being described. Automated outreach through the professional network is prohibited by its user agreement. Bulk audience extraction from social platforms is prohibited by theirs. Business messaging on the named messaging platform operates under an opt in regime with template approval that the vendor does not mention.

Two passes located no statement of interface access, no partnership, no licensing arrangement and no acknowledgement that any of it carries risk.

What sits on the right side of the line is the email and telephony infrastructure, which runs through the vendor's own mailboxes, a published mail transfer configuration and a cloud call centre, all of which are sanctioned paths.

The exposure lands on the customer, since the accounts and numbers running the campaigns are theirs.

Ask under what agreement outreach reaches the professional network and the messaging platform.

AI Safety and Data StewardshipAI Safety and Data StewardshipThe cross client boundary: whether customer data trains models that serve competitors, plus retention and deletion posture.
DD on AI Safety and Data StewardshipNothing published on how customer data is used in model development, on a product built to ingest the customer’s commercial conversations and pipeline.
Vendor Published

A voice agent talks to strangers and books meetings, with no guardrail described and no model disclosed.

The capability is sold plainly: get more meetings booked with your calling agent. That means a synthetic voice conducts an unscripted conversation with a person, handles whatever they say, and commits the customer to a calendar appointment. Two passes located no accuracy figure, no evaluation, no error rate, no statement of what the agent may not say, no description of how a conversation is stopped once it goes wrong, and no requirement that the agent identify itself.

Conversational text messaging and generated campaign copy carry the same absence on lower stakes channels.

Stewardship is equally undescribed. Call recording is unlimited on every tier, meaning the platform accumulates audio of conversations with prospects and, on the healthcare positioning, potentially with patients. Two passes located no encryption statement, no access control description, no retention schedule for recordings, no incident response or breach notification process, no named security contact and no vulnerability disclosure route.

The compliance row in the pricing table is the only gesture toward any of this, and it is misspelled.

Ask what constrains the calling agent and how long recordings are kept.

Recipient Disclosure and AuthenticityRecipient Disclosure and AuthenticityHow the product presents itself to the people it targets: whether automated outreach and AI agents disclose themselves, whether sender personas are real, and whether personalization is grounded in verifiable fact. Measured as known compliance with Article 50 of the EU AI Act, in force since August 2, 2026, which requires AI systems that interact with individuals to disclose that fact.
DD on Recipient Disclosure and AuthenticityThe product ships fabricated human personas or undisclosed AI interaction by design, or its marketing celebrates evading detection, with no acknowledgement of the disclosure obligations in force.
Vendor Published

A synthetic voice calls a prospect, books a meeting and is never described as identifying itself.

The product is marketed as a calling agent that gets more meetings booked, operating inside multi channel sequences alongside email and text. A person receiving that call hears a voice, has a conversation and agrees to a meeting. Two passes located no requirement that the agent disclose it is automated, no statement that it does, and no configuration option covering the question.

Call recording compounds it. Recording is unlimited on every tier and nothing describes a recording notice, a consent capture step or any regional restriction, in a product whose own industry pages target jurisdictions where all parties must agree before a call is recorded.

Conversational text messaging extends the same construction to a second channel, replying to prospects without a described disclosure, and generated campaign copy goes out under the seller's name without indicating authorship.

On identity the record is otherwise clean. Mailboxes belong to the customer, numbers are provisioned to the customer at a published rate, and two passes located no persona, no rented account and no undetectability marketing.

The issue is not who appears to be sending. It is that nothing on the receiving end is told a machine is speaking.

Ask whether the calling agent announces itself and whether recording is disclosed.

Integration and Deployment
Ecosystem and Integration DepthEcosystem and Integration DepthDocumented depth of CRM and stack integration: objects, sync direction, API surface, marketplace presence that matches the claims.
CC on Ecosystem and Integration DepthIntegrations are listed as logos. Depth, direction, and limits are not documented anywhere a buyer can read.
Third Party Estimated

The connectors exist and the documentation for them does not.

What is confirmed: a dedicated page for record system integrations sits in the site navigation, third party sources name four major record systems as supported alongside webhooks, a mail transfer configuration page is published for connecting sending infrastructure, and a channel partner programme and an affiliate programme both operate.

One unusual credit is due. The vendor publishes a product roadmap page, which very few records in this index do, and which lets a prospective buyer see what is coming rather than asking a salesperson.

What two passes could not locate: interface documentation, an authentication scheme, rate limits, a model context protocol server, or a connector list readable on a vendor page rather than inferred from directories. The integrations page exists in navigation but its contents did not surface, so the four named record systems reach this record third hand.

The strategic position is the same one recorded for other all in one platforms this week: the product intends to replace the stack rather than join it, which reduces the need for connectors and leaves a buyer with an existing system of record less well served.

Ask for the connector list and whether a documented interface exists.

Deployment Model and Data ResidencyDeployment Model and Data ResidencyWhere the product runs and where customer data lives, including residency options for EU buyers.
DD on Deployment Model and Data ResidencyNothing published on where or how the product runs and where customer data is stored.
Vendor Published

Nothing about the infrastructure was located on any surface.

Two passes across the pricing page, the multi channel page, the feature navigation and the industry pages found no hosting provider, no region, no data centre, no residency commitment, no tenancy or isolation model, no encryption statement, no backup position, no continuity plan, no uptime commitment and no status page.

What is known about the architecture comes from the product rather than from any disclosure: a cloud call centre carries the telephony, mailboxes are provisioned and rotated, landing pages are hosted on customer supplied domains, and an image store and help documentation run on subdomains of the vendor's previous brand. That last detail establishes that the infrastructure spans two domains mid rebrand without establishing where any of it sits.

The holdings give the question weight. Call recordings, text message threads, a 700 million record database, form submissions captured on customer domains and campaign history all live somewhere unstated.

The healthcare positioning makes it consequential rather than academic, since a buyer in that sector cannot accept a vendor whose processing location is unknown.

Ask where call recordings and the lead database are stored, and in which jurisdiction.

Security Certifications and Trust CenterSecurity Certifications and Trust CenterVerifiable security posture: enumerated current certifications and a trust center an outsider can actually read.
DD on Security Certifications and Trust CenterNo verifiable security posture published for a product that ingests commercial data at scale.
Vendor Published

One compliance claim exists, it sits in a pricing table, and it is misspelled.

The row appears in the phone system section of the pricing comparison, rendering the health privacy regulation as HIPPA. The same misspelling appears in the site navigation, where the healthcare industry page is described as offering HIPPA complaint calling, compounding the statute error with compliant rendered as complaint. That is the entirety of the vendor's compliance signalling.

Two passes located no certification of any kind, no service organisation control report, no international standard, no penetration test, no trust portal, no security page, no encryption or access control description, no vulnerability disclosure route, no named security contact and no subprocessor list.

The positioning makes the gap harder to set aside than it would be for a smaller scope product. This platform markets to enterprises and to healthcare, stores unlimited call recordings, holds a 700 million record database and provisions telephone numbers. Buyers in either of those two segments run supplier security reviews as a matter of course and will find nothing to review.

A compliance claim carrying two spelling errors in the places a buyer evaluates it is weaker evidence than no claim, because it suggests nobody with regulatory knowledge read the page.

Ask which independent assessment supports the compliance row and when it was performed.

Commercial and Operational
Commercial TransparencyCommercial TransparencyWhether a buyer can budget without a sales call. Published pricing graded on completeness, not on the price itself.
BB on Commercial TransparencyPartial pricing published (entry tiers real, enterprise opaque) or pricing published with load bearing exclusions.
Vendor Published

The telephony metering is published to four decimal places, and the page contradicts itself on the trial.

What is disclosed is substantial. Three annual tiers carry figures at 1,970, 4,970 and 9,970 dollars, with an annual option stated as two months free against monthly billing. A comparison table runs across five sections covering leads, cold outbound email, the phone system, sales tooling and funnels. Allowances are enumerated per tier rather than summarised: mailboxes at 5, 20 and 100, active prospects at 2,000, 10,000 and 25,000, and lead search and enrichment credits at 1,000, 3,500 and 8,000.

The phone system disclosure is the standout and it is the line item most vendors bury. Each dedicated number is 5 dollars monthly, inbound calls run at 0.014 dollars a minute and outbound at 0.025, with two way messaging, recording and call volume unlimited. Publishing per minute telephony rates lets a buyer model the real cost of a dialing programme, which the headline subscription figure alone never reveals.

Contract terms are stated as pay as you go with no contracts or commitments and plan switching available.

The contradiction is on the same page. The page title advertises a fourteen day free trial and both the description and the hero state no credit card is required, while the page's own frequently asked questions answer the question of whether the product is free with a flat no, stating a paid plan is required to get started.

Ask whether a free trial exists, since the pricing page answers both ways.

Exit and Data PortabilityExit and Data PortabilityWhat happens when a customer leaves: completeness of data export, rights to enriched or licensed data after termination, deletion commitments, and auto renewal mechanics, graded from published terms and documentation.
DD on Exit and Data PortabilityNo published export path and no public terms on what survives termination, or terms that require purging delivered data on exit without saying so anywhere a buyer would look before signing.
Vendor Published

The commercial exit is clean and the data has no described route out.

What is committed: pay as you go with no contracts or commitments, plans switchable through support, and no minimum term. A customer can stop paying at the end of a period without penalty, which removes the most common lock in and is stated plainly in the vendor's own questions.

What is undescribed is everything else. Two passes located no export mechanism, no format, no scope statement, no timeline, no deletion commitment, no retention position after cancellation and no account closure process.

What accumulates deserves naming because it is unusually broad for a single subscription. Lead lists and enrichment results, campaign history and performance, unlimited call recordings, two way text message threads, form submissions, booking history, and landing pages hosted on a custom domain. That last item is the sharpest: pages built here and served under the customer's own domain become part of their public web presence, and nothing addresses what happens to them when the subscription ends.

Provisioned telephone numbers raise the same question, since a number printed on marketing material cannot simply be abandoned.

Ask whether numbers port out and what happens to hosted landing pages after cancellation.

Deliverability and Sending DisciplineDeliverability and Sending DisciplineThe operational craft of sending: warmup, rotation, volume governance, spam rate monitoring, and what happens when reputation degrades.
BB on Deliverability and Sending DisciplineReal deliverability features documented, with the operating discipline (limits, monitoring, intervention) asserted rather than specified.
Vendor Published

Four free tools published outside the paywall, and the warm up is gated to the tier least likely to need it.

The published tools are the reason for the grade. A mailbox calculator sizes how many inboxes a given cold outreach volume requires, which is the calculation most senders get wrong. A sender authentication record checker validates policy and reporting records against a domain. An address verifier checks deliverability before sending. An addressable market calculator sits alongside. All four are open, working and free, and a published guide walks through the three sender authentication mechanisms by name. A mail transfer configuration page supports connecting sending infrastructure properly.

Giving away an authentication checker and a capacity calculator is a contribution to the discipline rather than a claim about it, and it is more than most dedicated sending tools in this index provide.

In product: inbox rotation unlimited on every tier, mailbox counts published per tier, a flow test step before campaigns run and unlimited split testing.

The deduction is a gating decision that runs the wrong way. Advanced model driven mailbox warm up appears only on the top tier at 9,970 dollars. Customers on the two lower tiers are running cold campaigns from five or twenty rotating mailboxes without the vendor's own warm up capability, which is precisely where reputation damage begins.

No measured deliverability data, bounce policy or sending ceiling is published.

Ask what warm up the lower two tiers get and what the per mailbox daily ceiling is.

Segment and Market CoverageSegment and Market CoverageWho the product actually serves, evidenced: segments, geographies, languages, and customers that match the claim.
BB on Segment and Market CoverageSegment focus is clear and evidenced with a gap in geographic or language specifics.
Vendor Published

Eight industries with dedicated pages, and one of them rests on a misspelled claim.

The named segments each carry their own page: agency, enterprise, recruitment, startups, small business, software teams, healthcare and information technology services. That is more segment specificity than most vendors of this size attempt, and the pages are distinct rather than a template with a swapped noun.

Buyer size is drawn cleanly through the tier structure, from individuals and small teams at the entry plan, through growing teams and smaller businesses in the middle, to enterprises and advanced users at the top, with allowances scaling in step. A startups programme exists with its own page and a discounted arrangement referenced in the pricing questions. A managed service sits alongside self serve for buyers who want campaigns co created rather than run themselves, which is a genuinely different commercial motion offered openly.

Two gaps. Geography is stated nowhere: no country, no region, no coverage statement for the lead database and no indication of where telephone numbers can be provisioned, despite telephony being priced per number.

And healthcare, one of the eight, rests entirely on a regulatory compliance claim that is misspelled in both the navigation and the pricing table, which makes it the weakest of the segment claims rather than the strongest.

Ask which countries the database covers and where numbers can be provisioned.

Commercial

Pricing

Vendor-published figures are labeled as such. Figures labeled “Estimated” are derived from third-party sources and have not been confirmed by the vendor.

Entry Price Pricing Basis Data Processing Terms Implementation Source
1,970 dollars per year (Grow), plus 5 dollars per phone number monthly and per minute call charges
$1,970 baseline
Published annual subscription across three tiers with a stated annual option of two months free against monthly billing: Grow at 1,970 dollars yearly covering 5 unique mailboxes, 2,000 active prospects and 1,000 lead search and enrichment credits; Ultimate at 4,970 covering 20 mailboxes, 10,000 active prospects and 3,500 credits; Enterprise at 9,970 covering 100 mailboxes, 25,000 active prospects, 8,000 credits, advanced model driven mailbox warm up and a dedicated success manager. Unlimited lead search, unlimited campaigns, unlimited inbox rotation and unlimited split testing apply on every tier, alongside access to a claimed 700 million record lead database. Telephony is metered separately and precisely: 5 dollars per dedicated number monthly, inbound calls at 0.014 dollars per minute and outbound at 0.025, with unlimited two way messaging and call recording. Buyer intent data is available on request on all tiers rather than included. Terms are pay as you go with no contract or commitment. A privacy policy and terms of use are published and linked in the footer of every page, though neither was opened in this pass. Two passes located no data processing agreement, no subprocessor list, no retention schedule, no deletion commitment, no residency statement, no rights request process, no named privacy contact and no reference to any data protection regime. The only compliance signalling on the site is a row in the pricing comparison table for the phone system, rendering the health privacy regulation as HIPPA, with the same misspelling and a further error appearing in the site navigation where the healthcare page is described as offering HIPPA complaint calling. No independent assessment supporting that row was located. None charged as a separate fee. White glove onboarding is stated as available with each plan, with no price attached and no scope described. The vendor states no free plan exists and that a paid plan is required to get started, offering a personalised demonstration and onboarding session before a subscription commitment instead. Plans are pay as you go with no contracts or commitments and can be switched through the support team. A separate managed service operates alongside the software, in which the vendor co creates campaigns, runs custom lead generation and outreach, and offers to reach more than a hundred thousand prospects monthly on the customer's behalf; it is quoted only through a demonstration request and no rate is published. A startups programme with discounted access exists and is also quoted through the sales team. Vendor Published

The pricing page is unusually detailed in one respect and contradicts itself in another.

The detail is the telephony metering, which is the line item most platforms in this category conceal behind a subscription headline. Each dedicated telephone number is 5 dollars monthly. Inbound calls run at 0.014 dollars a minute and outbound at 0.025. Two way messaging, call recording and call volume are unlimited. Publishing per minute rates at that precision lets a buyer model the real cost of a dialing programme before committing, and almost nothing else in this index does it.

The comparison table extends the same treatment across five sections. Mailboxes are stated at 5, 20 and 100 by tier. Active prospects at 2,000, 10,000 and 25,000. Lead search and enrichment credits at 1,000, 3,500 and 8,000. Campaign generation is limited on the entry tier and unlimited above. Advanced model driven mailbox warm up is stated as available only on the top tier, which is a gating decision a buyer should notice because it places warm up out of reach of the plans running five and twenty mailboxes.

Contract terms are stated plainly as pay as you go with no contracts or commitments, with plan switching available through support.

The contradiction sits on the same page. Its title advertises a fourteen day free trial, its description and hero both state no credit card is required, and its own frequently asked questions answer the question of whether the product is free with a flat no, stating that a paid plan is required to get started and offering a demonstration and onboarding session instead. A buyer cannot tell from the page whether a trial exists.

Two items carry no price. White glove onboarding is marked as available with each plan with no figure attached. Buyer intent data is marked on request on all three tiers rather than priced. The managed service, which offers to reach more than a hundred thousand prospects monthly and co create campaigns, is quoted only through a demonstration request.

Naming note for anyone rechecking: the roster lists this vendor as SendBuzz at sendbuzz.io, which now resolves to salesstack.com.

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GTM Tech Index

An independent reference for evaluating the software revenue teams use to find, win, and keep customers. No vendor pays for inclusion, placement, or rating.

Index Status
Last index update
August 24, 2026
The GTM Tech Index is an editorial reference, not a law firm or a regulator. Compliance postures are assessed from published sources and public records, and nothing on the index is legal advice. Figures labeled “Estimated” have not been confirmed by the vendor. See the Methodology page for evaluation standards and limitations.
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