
Simple Client Onboarding and Verification

Churnfree
ChurnKey
Baremetrics Cancellation Insights
Churn Solution
Echurn
Raaft
Retainfy
Retain tracks your customer base 24/7, identifies churn risk early and tells you why, helping you reach out with the right context at the right time

Website, pricing, platforms and company facts side by side.
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| Website | stackgo.io | retain.so |
| Pricing | ||
| Company | — | Startup from Brazil |
| Listed in |
What each product offers, as listed by its team.


Possible disadvantages
An editorial look at what each product does well and who it suits.


Overall verdict
Why this product is good
Recommended for
Overall verdict
Why this product is good
Recommended for
How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing StackGo and retain.so.
retain.so's answer:
Three reasons. First, it predicts churn before the cancel instead of fighting it at the cancel flow like most tools do. Second, it is built for founders and small teams: self-serve, live in under an hour, starts at $29/mo, no enterprise demo gauntlet and no CS team required. Third, it tells you why an account is at risk and what to do next, not just a black box score. Connect your payment provider and you are reading account health the same day.
retain.so's answer:
Most churn tools wake up the moment a customer clicks cancel. Retain wakes up weeks earlier. It reads your product usage and payment signals, scores the health of every account in real time, and alerts you while you can still act, with the reason why and a suggested next step. Predict and prevent, not react at the cancel screen.
retain.so's answer:
B2B SaaS solo founders, small teams, and indie hackers. Subscription products at or approaching product-market fit that want to cut churn without hiring a customer success or data team.
retain.so's answer:
Retain started from a familiar frustration: customers churned that the data had been quietly flagging for weeks. Usage was dropping, payments were stuttering, the signals were all there, but nobody was watching them in time. The tools that did watch were enterprise platforms built for big CS teams, priced and scoped to match. Retain exists to give small SaaS teams that predictive view without the enterprise overhead: see churn coming, understand why, and act before it is too late.
retain.so's answer:
TypeScript across the stack. Next.js and React on the frontend, Fastify on the backend, PostgreSQL with Drizzle ORM, Redis and BullMQ for background jobs.
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