Data & Enrichment
O

Outstack

Prospect research and message generation layer that sits upstream of whatever sending tool a team already runs, rather than competing with it. The workflow is three steps and the vendor describes it as such: import prospects from a professional network search, an uploaded file or an automated feed, have the platform research each person individually and produce a lead score plus personalized copy written against the customer's own product, then push the enriched and drafted records out to the tools that will actually send them. Verified email addresses are attached during enrichment.

Export is deliberately unconstrained, with no volume limit on any plan and an outbound endpoint that will post the results to any system the customer nominates, which makes the product a component in a stack rather than a destination. A manual review step sits between generation and export. Multi company workspaces run to five on the middle plan and are unlimited above it, which is aimed squarely at agencies running several clients. Operated by Processboard Limited from Exmouth in the United Kingdom and Toronto. Note that the source listing for this index gives a different top level domain for this vendor than the one serving this product.

Last VerifiedAugust 21, 2026
Compare Outstack with other vendors
Founded
—
Headquarters
Exmouth, United Kingdom
Website
www.outstack.co
Categories
data-and-enrichment, sales-engagement, linkedin-social-selling
Assessment

Capability Axes

Capability grades

17 of 17 axes rated · 2 graded A or B

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

The model layer is the middle of three steps and the other two are plumbing, yet a working pipeline survives its removal. Strip the models and the buyer loses per prospect research, the generated personalised copy and the automated lead scoring, and retains a professional network search scraper, an email verification lookup and an export endpoint, which is a real if thin category of product in its own right.

The vendor's own pricing meters the two halves separately, selling prospect profile enrichments and copy generation credits as distinct units on the entry plan, which is the clearest available evidence that the generation layer is an addition priced on top of a data pipeline rather than the substrate itself.

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 oversight mechanic is named and nothing surrounds it. The vendor lists a manual review and approval system as a product feature sitting between message generation and export, which puts a human gate in front of machine written copy before it reaches a sending tool, and that is more than most vendors at this size publish. Workspace partitioning by company is real too, running from one to five to unlimited across the tiers, which lets an agency separate client data properly.

Held at the middle band because the approval feature is a name without mechanics: nothing states who may approve, what they see, whether approval can be bypassed or skipped in bulk, or whether anything is recorded when it is. No role model, permission structure, audit trail or guardrail on what the generator may write appears anywhere.

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.
CC on AI Disclosure and Model TransparencyThe product is described as AI powered with the stack, the disclosure behavior, and the scoring logic all unstated.
Vendor Published

No base model, provider, family, version or hosting arrangement appears anywhere on the page read. The product researches individual people, scores them, and writes copy in the customer's voice after learning their company and product, and none of that machinery is described beyond what it produces. Generation is metered commercially as credits, so the model layer is billed by the unit and specified nowhere, which is the same asymmetry recorded repeatedly this session.

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

There is no evidence of any kind. No customer is named, no logo appears, no testimonial is published, no case study exists, no review platform is cited and no usage or scale figure is given anywhere on the site. What pushes this to the floor rather than leaving it as a thin absence is that the one number on the page is an unsupported outcome promise attached to a price: the entry tier is positioned as suitable for a buyer who needs an extra fifteen to twenty sales calls a month, which tells a prospect what result to expect from a specific spend with nothing whatsoever behind it, no method, no sample, no customer and no qualification.

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.
CC on Outreach Compliance PostureCompliance is mentioned as the customer’s responsibility, with little or no product enforcement described. The tool can be run lawfully, and nothing about it helps.
Vendor Published

The vendor sits upstream of sending, which genuinely changes the shape of this axis without removing it. Nothing here dispatches mail or messages; the product hands enriched records and drafted copy to whatever tool the customer already sends from, so the statutory obligations attach at that downstream step rather than here. What the vendor does supply is the address, freshly verified, for a person who has not asked to be contacted, together with the message that will be sent to them.

No statute, consent position, suppression mechanism or list source restriction appears anywhere, and there is no terms of service or acceptable use document in which such a position could sit, so nothing passes any obligation to the customer either.

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

No privacy policy exists. The footer of this site contains a location line and a copyright notice and nothing else, with no privacy policy, cookie policy, terms of service or data protection contact linked anywhere on the page. That absence is established rather than merely unlocated, because the footer is complete and short.

Set against what the product does it is the floor: the platform scrapes profiles of named individuals from a professional network, attaches verified email addresses to them, generates written content about each person, stores the result and exports it onward, all without publishing a lawful basis, a retention period, a data subject rights route, a deletion mechanism or an address to send a request to. The operating entity is a United Kingdom registered company, so the domestic data protection regime applies to it directly.

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.
CC on Data Licensing and ProvenanceData is described by its size and coverage with its origin unstated. The provenance question is answerable only by asking the vendor.
Vendor Published

Unusually candid about the source and silent on the right to use it. The vendor names its primary data source outright and describes the method plainly, listing a search scraper for a professional network's paid prospecting product as a bulleted feature, which is more provenance than most vendors in this category disclose and is creditable as honesty even where it is damaging elsewhere.

Beyond that the sourcing goes dark: the freshly verified email addresses attached during enrichment have no stated verification provider, coverage figure or accuracy rate, the auto enrichment layer names no partner, and no licence, permission or lawful basis is stated for collecting, storing or reselling any of it.

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

The vendor names a feature after the act of breaching a platform's terms. A search scraper for a professional network's paid prospecting product appears as the first bullet of the import step, so extracting search results from a subscription product that prohibits automated collection is not an inference from the architecture, it is a named capability on the homepage. Automated profile addition by webhook sits beside it.

No conformance position for that platform or any other appears anywhere on the site, and because no terms of service exist, nothing passes the obligation or the risk to the customer either, which leaves a buyer relying on the vendor with no written allocation of who answers if the source account is restricted. Nothing here is marketed as evasion, and that is the only thing separating this from the very worst of the band.

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.
CC on AI Safety and Data StewardshipSecurity language exists but the training question, the one this axis turns on, is unanswered: a buyer cannot tell whether their pipeline data improves a competitor’s instance.
Vendor Published

Nothing states whether customer content trains or improves any model, and there is no document anywhere in which such a statement could live. The material at stake is real on both sides: the platform is explicitly told to learn the customer's company and product in order to write in their voice, so it holds each account's positioning as working input, and it simultaneously holds scraped personal data on the third parties being written about.

No non use commitment, confidentiality undertaking, provider retention arrangement or separation statement between accounts was located, because no privacy policy, terms of service or processing addendum is published at any route on this site.

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.
CC on Recipient Disclosure and AuthenticityNothing published on whether recipients are told they are dealing with software. For a product whose AI talks to prospects, silence here is now a regulatory posture, not a style choice.
Vendor Published

Machine written copy about a scraped individual is produced here and sent elsewhere, which splits the disclosure question across two vendors and leaves it unanswered by either. This product generates the personalised message and hands it to the customer's sending tool, so the moment of contact happens outside its walls, but the authorship question originates inside them.

No position on article 50 of the European artificial intelligence regulation appears anywhere, no disclosure line, identifier or sender transparency option is offered in the generated output, and no guidance is given to the customer about disclosure downstream. Held at the middle band rather than lower because the marketing sells conversion rather than undetectability, and because the manual approval step means a human sees the message before it leaves.

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.
Vendor Published

Genuinely open in architecture and entirely unnamed in partners. Data enters by webhook and leaves by an outbound endpoint that will post to any system the customer nominates, with export explicitly unlimited on every plan including the cheapest, which is a more open posture than most vendors twice this size take. Integration support is sold as an escalating service across the three tiers, rising to implementation help for the whole outreach system on the top plan.

Against that, not one integration partner, system of record, sending tool or platform is named anywhere on the page, there is no integrations page, no developer documentation, no marketplace and no published specification for the endpoint, so a buyer knows the product will export anywhere without being shown it exporting anywhere.

Deployment Model and Data ResidencyDeployment Model and Data ResidencyWhere the product runs and where customer data lives, including residency options for EU buyers.
CC on Deployment Model and Data ResidencyCloud hosted is the whole public answer. Region and residency questions require a sales conversation.
Vendor Published

Nothing on hosting provider, country, region, data centre or residency option appears anywhere. Two geographic facts are published and both concern the company rather than the data: the operating entity is named as a United Kingdom registered limited company, and the product is described as made in Exmouth in the United Kingdom and Toronto in Canada.

That establishes jurisdiction and a development footprint across two countries, which is more than several vendors this session disclose, and tells a buyer nothing about where scraped prospect records, verified addresses or their own product positioning are actually stored.

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

No security disclosure of any kind exists, and the absence is established rather than unlocated because the footer of this site contains only a location line and a copyright notice, with no security page, trust centre, status page, certification badge or vulnerability contact anywhere on it. There is no audit, attestation, penetration test, control set or encryption statement.

Set against what the platform holds this is the floor: personal data scraped on named individuals at named employers, verified email addresses attached to them, the commercial positioning each customer supplies so the generator can write in their voice, and credentials or session access sufficient to run searches against a professional network's paid product.

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

A buyer can very nearly compute their bill from the page. Three tiers carry real monthly figures at sixty seven, one hundred and ninety seven and six hundred and ninety seven dollars, with an annual option and the saving stated as a percentage. Every gating quantity is published: prospect enrichments, copy generation credits, team member seats and the number of separate company workspaces, which is the allowance that actually matters to the agency buyer this product targets.

Fifty free credits open the account. The vendor states plainly that all features are available on all plans with only volume limits differing, which removes the feature gate that decides the real bill at most competitors, and it is the kind of commitment a buyer can hold them to.

Off the top band on one specific and load bearing gap: credit add ons are offered on two tiers with no rate published for them, so a customer who exceeds their monthly enrichment or generation allowance cannot find out what the next block costs, and no overage behaviour is stated either.

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.
CC on Exit and Data PortabilityExport exists as a feature claim while the terms that govern exit, data rights after termination, deletion, and auto renewal mechanics, are not published anywhere a buyer can read.
Vendor Published

The product half is unusually good and the contractual half does not exist. Unlimited export of prospect data is listed as a feature on every plan including the entry tier, the vendor states separately that all prospect data and generated messages can be exported, and an outbound endpoint will post the whole set to any system the customer chooses, so bulk retrieval is a designed capability available at the lowest price rather than a concession negotiated at the end.

That is the pattern this index has repeatedly found separates vendors who genuinely have portability from those who claim it. Against it, there is no terms of service, no subscription agreement and no privacy policy anywhere on the site, so no post termination retrieval window, deletion timeline, retention period, data return obligation or cancellation procedure is published, and a departing customer has a working export button and no written right to anything.

Deliverability and Sending DisciplineDeliverability and Sending DisciplineThe operational craft of sending: warmup, rotation, volume governance, spam rate monitoring, and what happens when reputation degrades.
CC on Deliverability and Sending DisciplineDeliverability is invoked as a benefit with no documented mechanism. For senders this is the axis where marketing most outruns evidence.
Vendor Published

Structurally a weak fit for this axis, graded on what is knowable, with the context carried here. This product operates no sending infrastructure: it connects no mailboxes, runs no campaigns and dispatches nothing, handing finished records to the customer's own sending tool where the reputation consequences land.

The one contribution it does make to deliverability is real and worth naming, in that email addresses are verified at the point of enrichment and described as freshly verified, which removes invalid records before they can generate bounces downstream. No verification provider, accuracy rate or bounce guarantee is published, and none of the warmup, authentication, pacing, complaint threshold or volume governance this axis normally measures applies to what the vendor actually does.

Segment and Market CoverageSegment and Market CoverageWho the product actually serves, evidenced: segments, geographies, languages, and customers that match the claim.
CC on Segment and Market CoveragePositioning language covers everyone from startup to enterprise, which specifies no one.
Vendor Published

The buyer is named at the top of the page as agencies, individual sales professionals and go to market teams, and each tier carries a short statement of who it suits, running from a single operator wanting more calls a month through a small team or agency to an organisation.

The agency case is backed by a real product decision rather than a claim, since the number of separate company workspaces rises from one to five to unlimited across the tiers and a dedicated question addresses using the tool across client accounts, which is the feature an agency actually needs.

Beyond that the coverage half is empty: no region, country, language, industry or company size band is published, no customer count or usage figure appears, and there is no statement of who this is wrong for.

Head to Head

Compared With

Editorial comparisons are published only where the index assesses two vendors as direct competitors for the same buyer. Each carries a verdict, the buyer conditions that favor each vendor, and a graded side by side.

Commercial

Pricing

What this vendor charges, what it commits to in writing, and where the bill can move. Figures the vendor publishes itself are labeled Vendor Published. Figures labeled Estimated come from other sources and the vendor has not confirmed them.

What it costs
Vendor Published
Not retrievable
allowances render with 300 enrichments and 2,000 generation credits, and no tier rate
In short
  • ›The pricing page returns an error and the rates do not appear on the homepage either, though the plans and allowances do.
  • ›What you can see: 2,000 copy generation credits, 300 prospect enrichments, and on a higher plan 1,000 monthly messages and enrichments combined. Team members go from 3 on one plan to unlimited above.
  • ›Read that combined allowance carefully. Messages and enrichments share one pot on the upper plan, so enriching heavily leaves less room for outreach.
  • ›The seat jump is what will move most small teams. Three members on one plan and unlimited on the next means a team of four upgrades on headcount rather than volume.
  • ›One good structural point: they state every plan gets all features with minimal limits, so you never upgrade to unlock a function, only to get more headroom.

How the price works

What you are charged for, and what makes the bill go up.

Not retrievable as rates. The dedicated pricing address returns not found, and the homepage carries the tier structure without figures.

What renders: tier names, a monthly and annual billing toggle with the annual option stated as saving 20 percent, a free start route, and published allowances. Copy generation credits at 2,000. Prospect profile enrichments at 300. A combined allowance of 1,000 monthly personalized outreach messages and prospect enrichments on a higher tier. Team members at 3 on one tier and unlimited above.

The vendor states that all pricing plans access every feature with minimal limits, so tiers differ by volume rather than by capability.

Credit add ons are published as available without rates.

Published capabilities include automatic enrichment with verified email, sending enriched prospects to the buyer's preferred tools ready for outreach, and export of all prospect data and messages.

Small figures at $17, $20, $24 and $1 appear in the served document unattached to any tier or commercial statement, and are not recorded as pricing.

No tier rate, band, seat minimum or contract length is established.

What the contract says about your data

What the vendor commits to in writing once your data is in the product.

Not established. The dedicated pricing address returns not found and the homepage served no legal or security links in the retrieved markup. No processing agreement, sub processor listing, certification claim, retention period or residency statement was located.

The custody question is the enrichment one. The platform performs prospect profile enrichment and automatic enrichment with verified email addresses, which means contact records about people who never approached the buyer, drawn from sources the vendor selects.

One published capability describes the data flow explicitly and is worth recording. The vendor states that enriched prospects are sent ready for outreach to the buyer's preferred tools, so records leave the platform into third party systems by design. At that point retention becomes the buyer's obligation across whatever tools receive them, rather than sitting with a single vendor.

A buyer selling into Europe or the United Kingdom should establish source provenance before building a motion on the data, and should note that a platform designed to push records outward makes deletion requests harder to satisfy than one holding data in place.

Export of all prospect data and messages is published as an entitlement, which is favorable commercially and widens the same obligation.

Getting started

What it costs and what is included before the product is running.

None published and none located. A free start route is published, and no setup fee, onboarding charge, migration rate, professional services rate or seat minimum was found.

The annual arrangement is published as saving 20 percent, which is at the upper end of the range this index records, though the underlying rates did not render so the saving cannot be verified against two figures.

The cost structure that did render is the allowance set, published across three dimensions. Copy generation credits at 2,000 monthly, prospect profile enrichments at 300, and a combined allowance of 1,000 monthly personalized outreach messages and prospect enrichments on a higher tier. Team members run at 3 on one tier and unlimited above.

The combined allowance on the upper tier is worth reading carefully. Publishing messages and enrichments against a single pooled figure means the two compete for the same allowance, so a buyer enriching heavily has less headroom for outreach and the reverse. That is a pooling arrangement rather than two separate meters, and it is the shape recorded against Klenty and Lusha where it caused ambiguity.

Credit add ons are published as available without rates, so a top up path exists and cannot be priced.

The seat position changes sharply between tiers. Three team members on one tier and unlimited above means a team of four is pushed up a tier by headcount rather than by volume, which for a small agency is likely to be the binding constraint.

Export of all prospect data and messages is published as an entitlement, so extraction carries no charge.

What to watch for

Where this pricing can surprise a buyer who has not read it closely.

The pricing address returns not found, the tier structure and allowances render on the homepage, and the rates do not.

The dedicated pricing address is a 404. The homepage carries the tier names, a monthly and annual toggle with the annual option stated as saving 20 percent, published allowances, and a free start route. It carries no tier rate in the rendered content, and the small figures present in the served document at $17, $20, $24 and $1 are unattached to any tier or commercial statement and are not recorded as pricing.

What does render is the allowance structure, and it is published across three dimensions. Copy generation credits at 2,000, prospect profile enrichments at 300, and a combined monthly figure of 1,000 personalized outreach messages and prospect enrichments on a higher tier. Team members are published at 3 on one tier and unlimited above.

The unlimited team members entitlement is the structural point worth recording. A buyer moving from the tier with 3 members to the tier above removes the seat constraint entirely, so the ladder is a seat gate at the lower end and a volume ladder above it.

The vendor's stated position is that all plans access every feature with minimal limits, which is a different claim from the usual capability gating and means the tiers differ by volume rather than by function. A buyer therefore never needs to upgrade to obtain a feature, only to obtain headroom, which is the buyer friendly arrangement and matches Fuzzy Sequence's same product on every plan approach.

Credit add ons are published as available, so a top up path exists alongside the tier ladder. No rate is published for them, which is the gap: a buyer can see that topping up is possible and cannot compare it against upgrading.

The annual saving at 20 percent sits at the upper end of the common range in this index.

No dollar figure is recorded in the numeric field because no tier rate rendered.

Contact us

Found a vendor we missed? Have feedback on the index? We’d love to hear from you.