CueGrowth vs Outstack (2026)
The decision is what the personalisation is made of, because neither vendor's results can be checked. CueGrowth publishes a great deal of evidence and it does not survive being read closely. Twelve named logos carry the page and the same three figures appear against different customers on it: a 340 percent reply rate lift attributed to Skillfully in one panel and SnapLogic in the ticker beneath it, an 85 thousand dollar result attributed to QuestionPro as pipeline in sixty days and IdeaScale as revenue in two months, and more than 200 meetings a month attributed to Lava in one place and Forrester in another. Outstack publishes nothing at all, with no customer, logo, testimonial or case study anywhere, and one number on the page: an entry tier positioned for a buyer who needs an extra fifteen to twenty sales calls a month. So decide on the inputs. CueGrowth enumerates them, naming uploaded positioning and proof points, fifty or more enrichment signals and public sources including GitHub activity, documentation and job posts. Outstack names one, a search scraper.
- The human gate should sit on the cheapest plan rather than behind a quote. An approval position is stated three separate times, the workflow section is headed with the claim that the operator reviews while the model does the heavy lifting, the six step strip ends with an approve and send step, and human review before anything sends appears in the free tier feature list. Treat it as a position rather than a mechanism, since nothing states whether the review can be disabled, what happens at volume, or whether any audit trail records what was drafted against what was sent.
- The market definition is corroborated by engineering rather than by page copy. The stated audience is teams selling technical products to technical buyers, with four dedicated solution pages covering developer tools, cloud and infrastructure, enterprise software and complex business services, and three named roles beneath them. The proof it is real is the enrichment set, because a vendor that says technical buyers and then ships GitHub activity, documentation and job post signals has spent build effort on the claim rather than words.
- The free tier is a working tier and the paid one publishes its overage. The free plan carries the workspace, offering intelligence, list import, enrichment and draft previews, the paid plan is 299 US dollars per user per month with 15,000 credits and an overage rate published at 0.025 per credit, and the plan description states what is not capped, naming no limits on campaign contacts, saved contacts or inbox responses, which inverts the usual gate list. The gap to watch is that no credit consumption table was located, so a buyer cannot tell whether 15,000 credits is a month of work or a week.
- Sitting upstream of the sending tool is a deliberate design rather than a missing feature. The product connects no mailboxes, runs no campaigns and dispatches nothing, handing finished records and drafted copy to whatever tool the team already sends from, so the statutory obligations and the reputation consequences both attach at that downstream step rather than here. Email addresses are verified at the point of enrichment as well, which removes invalid records before they can generate bounces in your sequencer, though no verification provider or accuracy rate is named.
- Nothing is gated by feature, only by volume. The vendor states plainly that all features are available on all plans with only volume limits differing, which removes the gate that decides the real bill at most competitors and is a commitment a buyer can hold them to, and fifty free credits open the account before any of it is paid for. Every gating quantity is published beside the three prices, including the separate company workspaces that matter to an agency.
- You would rather know where the data comes from, even when the answer is uncomfortable. The vendor names its primary source outright and describes the method plainly, listing a search scraper for a professional network's paid prospecting product as a bulleted feature rather than leaving a buyer to infer it from the architecture. That candour is worth something on its own terms, and it is also the reason the GTM Tech Index grades this vendor D on platform terms exposure, so read it as informed risk rather than as reassurance.
Plain facts
| CueGrowth | Outstack | |
|---|---|---|
| Primary category | Sales Engagement & Outreach | Data & Enrichment |
| Founded | Not published | Not published |
| Headquarters | Not published | Exmouth, United Kingdom |
| Website | cuegrowth.ai | www.outstack.co |
Side by Side
| Axis | C CueGrowth |
O Outstack |
|---|---|---|
|
AI Capability
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| AI Centrality | ||
| Autonomy and Oversight Model | ||
| AI Disclosure and Model Transparency | ||
| Operational and Outcome Evidence | ||
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Compliance and Risk
|
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| Outreach Compliance Posture | ||
| Data Privacy Posture | ||
| Data Licensing and Provenance | ||
| Platform Terms Exposure | ||
| AI Safety and Data Stewardship | ||
| Recipient Disclosure and Authenticity | ||
|
Integration and Deployment
|
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| Ecosystem and Integration Depth | ||
| Deployment Model and Data Residency | ||
| Security Certifications and Trust Center | ||
|
Commercial and Operational
|
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| Commercial Transparency | ||
| Exit and Data Portability | ||
| Deliverability and Sending Discipline | ||
| Segment and Market Coverage | ||
The short version of each
CueGrowth
CueGrowth is an AI workspace for outbound marketed to teams selling technical products, running six stages on one thread from ingesting decks and documents into structured positioning, through ICP search and enrichment across fifty or more signals, to grounded drafting, campaigns and a unified inbox. The GTM Tech Index grades it C on operational and outcome evidence, because the surface looks strong and does not survive being read closely: twelve named customer logos include substantial companies and a full testimonial carries a name, title, company and photograph, while the same three figures appear against different customers on the same page, with a reply rate lift, a pipeline result and a monthly meeting count each attributed to two different companies in two different places.
Source: GTM Tech Index, 2026
Outstack
Outstack is a prospect research and message generation layer that sits upstream of whatever sending tool a team already runs, importing prospects, researching each person individually, producing a lead score and personalised copy written against the customer's own product, then pushing the drafted records outward. The GTM Tech Index grades it D on operational and outcome evidence, because there is no evidence of any kind: no customer is named, no logo appears, no testimonial is published, no case study exists and no usage or scale figure is given anywhere. What pushes it to the floor rather than leaving it a thin absence is that the one number on the page is an outcome promise attached to a price, positioning the entry tier for a buyer who needs an extra fifteen to twenty sales calls a month.
Source: GTM Tech Index, 2026
Common questions
Is CueGrowth better than Outstack?
Neither one's results can be checked, so the decision moves to what the personalisation is built from. The GTM Tech Index grades CueGrowth C on operational evidence and Outstack D. CueGrowth enumerates its inputs unusually well, naming uploaded positioning and proof points, fifty or more enrichment signals and public sources including GitHub activity, documentation and job posts, which is why it also sits at the top of the band on AI disclosure. Outstack names one input, a search scraper for a professional network's paid prospecting product, and is graded D on platform terms exposure for it.
Can you check either vendor's results?
No, in two different ways. CueGrowth publishes twelve named logos including substantial companies and a full testimonial with a name, title, company and photograph, and the same three figures appear against different customers on the same page: a 340 percent reply rate lift attributed to Skillfully in one panel and SnapLogic in the ticker beneath it, an 85 thousand dollar result attributed to QuestionPro as pipeline in sixty days and IdeaScale as revenue in two months, and more than 200 meetings a month attributed to Lava in one place and Forrester in another. Outstack publishes no customer, logo, testimonial or case study at all, and its one number is an outcome promise attached to a price.
What is the personalisation built from?
At CueGrowth, from the customer's own material plus the prospect's technical footprint. Offering intelligence ingests decks, videos and documents into structured positioning and proof points, and enrichment runs fifty or more signals per lead including GitHub activity, documentation and job posts, so a draft can cite a prospect's actual stack. At Outstack, from a scraped profile plus the customer's positioning, since the platform is explicitly told to learn the customer's company and product in order to write in their voice, then researches each imported person individually and produces a lead score alongside the copy.
How much do CueGrowth and Outstack cost?
Both publish figures and the GTM Tech Index grades both B on commercial transparency. CueGrowth runs a working free tier carrying the workspace, offering intelligence, enrichment and draft previews, then 299 US dollars per user per month with 15,000 credits and overage published at 0.025 per credit, and it states what is not capped rather than only what is. Outstack publishes sixty seven, one hundred and ninety seven and six hundred and ninety seven dollars monthly with every gating quantity beside them and fifty free credits to open an account. CueGrowth publishes no credit consumption table, so what 15,000 credits actually buys is unknown.
Does either publish a privacy policy?
CueGrowth does and Outstack does not, and the index grades them C and D respectively on data privacy posture. CueGrowth publishes three footer linked legal documents, one of which is a standalone data processing addendum, which is uncommon and creditable at this size, and none of them were read on this pass so their contents are recorded as unexamined rather than absent. At Outstack the absence is established rather than unlocated, because the footer is complete and short, carrying a location line and a copyright notice with no privacy policy, cookie policy, terms of service or data protection contact anywhere on it.
How does the GTM Tech Index grade CueGrowth and Outstack?
Both are graded on the same seventeen capability and compliance axes from public sources, at documentation depths of seventeen and thirteen respectively. The GTM Tech Index grades CueGrowth B on commercial transparency, AI centrality, autonomy and oversight and segment coverage, with every other axis at C and no D anywhere. Outstack takes B on AI centrality and commercial transparency, with D grades on data privacy posture, platform terms exposure, security certifications and operational evidence. The index publishes no composite score and declares no winner.
Related comparisons
Other published head to head assessments involving these vendors or their closest peers. The full set for this category is on the Sales Engagement & Outreach page.
The shared silence is that both vendors bill the model layer and specify it nowhere. Outstack meters generation commercially as copy credits, so the buyer pays by the unit for something whose base model, provider, family, version and hosting arrangement appear nowhere on the page.
CueGrowth is the more interesting case because it discloses the inputs unusually well and stops there: uploaded positioning, proof points and ICP criteria, fifty or more enrichment signals and named public sources are all enumerated, while provider, model family, version and inference location go unnamed, and no accuracy or error rate is published for enrichment, for ICP matching or for the intent tags that decide which prospects a representative works.
Neither vendor answers the residency question either. CueGrowth publishes no hosting provider, processing region, storage location or subprocessor list, with the only infrastructure reference located anywhere being a help centre article describing campaigns activating on a predecessor server, and Outstack publishes nothing on hosting, country, region or data centre beyond naming itself a United Kingdom registered company built across Exmouth and Toronto.
The exposure worth naming belongs to CueGrowth and it is a shape this index has not graded before. Its enrichment turns a developer's public commit history, documentation contributions and their employer's job postings into a qualification signal inside a sales database that developer never entered, at a stated scale of 900 million profiles, with no notification, self service lookup or removal route published anywhere.
Under the GDPR the duty to notify applies specifically when personal data is obtained from sources other than the individual. The benign reading is available and is probably correct: this is public information used lawfully on most readings, and the vendor publishes three legal documents including a standalone processing addendum that was not read on this pass and is the likely home for the answer. Nothing here asserts that either vendor is out of compliance with anything.