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Sales & Customers · Customer Success & Feedback

Retention

10 paid against 7 free you can run yourself.

Paid against free › Sales & Customers › Customer Success & Feedback › Retention · Talking to customers on Repo Radar

Retention tools keep existing customers from leaving. Two kinds compete here. Customer success platforms such as Gainsight, ChurnZero, Planhat, Vitally, Custify, Velaris and the newer Meza AI pull usage, CRM and support data into health scores and churn risk flags, then trigger playbooks and outreach for account managers. Subscription retention tools such as Churnkey and Chargebee Retention act at the moment of cancellation or a failed payment with cancel flows, save offers and dunning. Most customer success platforms are sold through sales calls, while the subscription tools publish entry prices. The open-source side is thin: a cancel-flow SDK and components, PostHog for retention analytics, Formbricks for churn surveys, and several new, small customer success projects worth watching.

Paid 10 reviewed

Prices and free tiers as checked, dated on each review.

GGainsight Customer Success Platform

Customer success platform for retention, growth, and AI-driven insights.

—CChurnZero

AI-powered customer success platform for subscription businesses to reduce churn and drive growth.

—OOdie (formerly Totango)

AI-driven customer knowledge engine for post-sales teams.

$500PPlanhat

Agentic customer platform for commercial teams to manage customer relationships.

—VVitally

AI-powered Customer Success Platform for CS teams.

—CCustify

AI-first customer success platform for SaaS teams

—VVelaris

AI agents for Customer Success teams to automate workflows and grow NRR.

—CChurnkey

Churnkey is customer retention software built for Stripe.

$250free tierCChargebee

Revenue infrastructure for AI, SaaS, and subscription businesses.

free tierMMeza AI

AI agents that watch accounts, flag churn, and draft actions for CS teams.

$1000free tier

Free 7 direct

Free to use. You run it on your own server.

Direct alternatives

They do this job.

SDchurnkey/sdk

A production ready cancel flow for React from Churnkey

★ 23FreeEXadityash8/exit-zero

🚀 AI-native retention infrastructure for SaaS companies. Reduce churn with personalized offers, Q-learning optimization, and complete data ownership.

★ 2FreeCSkyle-olmstead/cs-claude-engine

An open-source AI system that watches every customer account a CS team owns and tells them who is about to leave and who is ready to buy more. A human approves every action.

★ 1FreeREopensyndicate/recoup

Open-source agent that recovers failed payments and failed subscription renewals. A deterministic dunning policy engine plus a Claude agent for the judgment calls. Gateway-agnostic (Razorpay, Stripe, or your own).

FreeGTpumpgtm/gtm-ui

shadcn/ui billing components by PumpGTM (pumpgtm.com): Stripe cancel flow, save offers, subscription state. npx shadcn add @gtm/cancel-flow

FreeCUSalim698/customer-churn-prevention-n8n

Workflow n8n quotidien : calcule un health score par client SaaS, diagnostique le risque de churn avec Gemini et envoie un email adapté au niveau de risque.

FreeOPyashkhou/openretention

Self-hosted customer success software for B2B SaaS: explainable health scores, churn risk, renewals and revenue-at-risk.

Free

Feature by feature

Every paid tool and free repository we compared, marked against the same features.

✓has itPartlysome plans or extra work—confirmed not available?not confirmed✓the vendor's claim onlypricingClick a mark for its note and source

Paid · 10Free · 9
Featurechurnkey/sdkPostHog/posthogkyle-olmstead/cs-claude-engineyashkhou/openretentionadityash8/exit-zeropumpgtm/gtm-uiopensyndicate/recoupformbricks/formbricksSalim698/customer-churn-prevention-n8n
Starts atContact salesContact sales$1,500 per month (Odie Customer Operating System, starting price)Contact salesContact salesContact salesContact sales$250 per month, billed yearly (Starter)Contact sales (Enterprise); Starter $0 for Chargebee Billing customers$1,000 per month, billed monthly (Starter)MITMITApache-2.0BSLMITMITMITAGPL-3.0MIT
Data
Customer 360 account viewOne profile per account that brings together contacts, activity, revenue and history.
Product usage dataTakes in product usage or event data and uses it as a retention signal.
Billing system connectionConnects to a billing or payment system such as Stripe, Chargebee or Paddle.
CRM syncReads from or writes back to a CRM such as Salesforce or HubSpot.
Risk
Health scoresScores each account or customer for health from configurable signals.
Churn risk predictionFlags accounts likely to churn, by model or by rules, before they cancel.
Sentiment analysisReads tone or sentiment from conversations, tickets or feedback.
Action
Automated playbooksTriggers tasks, alerts or sequences automatically when signals change.
Customer email campaignsSends or drafts outreach emails to customers from the tool.
Cancel flows with save offersIntercepts a cancellation and presents surveys and offers such as discounts or pauses.
Failed payment recoveryRetries failed charges and runs dunning to recover involuntary churn.
Customer surveysRuns NPS or other customer surveys inside the tool.
Renewal trackingTracks renewal dates, renewal risk or renewal forecasts.
Reporting
Retention reportingDashboards or reports on churn, retention, saved revenue or at-risk revenue.
A/B testing of offersTests retention offers or flows against each other.
Platform
Self-hostingCan be run on your own infrastructure.

Also considered

Looked at, and left out of the comparison, with the reason.

Paid apps

  • SkalinCustomer success platform with health scores, playbooks and a 360 view, with public pricing from €569 per month billed annually for 5 CSM seats. It covers the same job as Custify and Velaris and ranked just below them on adoption.Source
  • HookAI agents for customer success that predict churn risk from product behaviour and conversations and prepare meetings. It publishes no pricing and ranked below the selected AI-first tools.Source
  • Certinia Customer Success CloudSalesforce-native customer success product from Certinia, aimed at renewal and satisfaction for companies running on Salesforce. It requires the Salesforce platform, so it is a narrower choice than the standalone platforms compared here.Source
  • Customerscore.ioCustomer success platform with machine-learning health scoring, churn prediction and playbooks, priced as one platform fee based on ARR. It does the same job as the selected platforms but ranked below them on adoption.Source
  • CustomerXCustomer success platform for the Brazilian market with health, journey automation and AI, with its site in Portuguese. It ranked below the selected platforms on adoption and language coverage.Source
  • ProsperStackCancellation flows, winback campaigns and revenue recovery for subscription businesses, from $200 per month for 50 to 500 cancel sessions. It overlaps closely with Churnkey, which was selected for its broader payment recovery and open-source SDK.Source
  • ClientSuccessCustomer success platform with insights, AI automation and meeting intelligence, priced for SaaS companies between $5M and $500M ARR. It covers the same job as the selected platforms and ranked below them on adoption.Source
  • Churn BusterDunning and cancel flows for subscription businesses, starting at $269 per month for one product or $430 for both, based on MRR. It overlaps with Churnkey, which offers more on retention testing and AI offers.Source
  • RaaftCancel flow tool with a free plan for 20 sessions a month and paid plans from $79 per month. It covers only the cancellation moment, a narrower scope than Churnkey and Chargebee Retention.Source
  • Paddle RetainPaddle's dunning and churn reduction product for businesses billing through Paddle. It is tied to the Paddle platform, so it suits only Paddle merchants and was ranked below the independent tools.Source
  • CatalystCustomer success platform that is now a Totango product, sold as a customer growth platform. Totango was selected to represent the vendor.Source
  • HubSpot Service HubHelp desk and customer service suite from HubSpot with ticketing and a customer success workspace. Its main job is support, so it belongs with help desks rather than retention tools.Source
  • Verint Voice of the CustomerMultichannel voice-of-the-customer measurement and feedback analytics for large enterprises. It measures feedback rather than running retention work, so it fits feedback tools better.Source

Repositories

  • F5Networks/SecondSightAsset and usage tracking tool for F5 BIG-IP and NGINX devices, despite the customer success wording in its description. It does not address customer retention.Source
  • maduuntnd/exitshield.euCancel-flow retention portal for B2B SaaS with Stripe offers and an analytics dashboard. Its licence file is a commercial, all-rights-reserved notice, so it is not open source.Source
  • ShreyasDasari/churnguard-aiChurn prediction app for SaaS that scores customers from uploaded data. The repository has no licence file, so its code cannot be reused.Source
  • decionis/stewardSupport decisioning interface for regulated fintech teams that forwards reviews to the Decionis platform. It depends on that platform and is aimed at support decisions rather than retention.Source
  • jackhoangvu/churnpulseStripe churn prevention project with a hosted demo, last changed in April 2026. The repository has no licence file and little documentation.Source
  • vishu7465/FlidgetCancel-intent detection and churn risk scoring for SaaS users, committed over two days in April 2026. The repository has no licence file.Source
  • kite-engine/kiteTurns product events into versioned customer state for customer success teams, described as CS as Code. It has no licence file and no activity since July 2026.Source
  • a2rp/customer-success-platformReact front-end demo of a customer success workspace for health, renewals and playbooks. It has no licence file and no back end, so it is a demo rather than a tool.Source
  • apexianlabs/retainkitAI win-back tool for churning customers with a hosted demo, last changed in May 2026. The repository has no licence file.Source

Gaps

What the research could not settle from the vendors' own pages.

What vendors don't publish

  • Seven of the ten paid tools publish no prices at all, including Gainsight, ChurnZero, Planhat, Vitally, Custify and Velaris. Buyers cannot compare cost without a sales call, and seat and account limits are hidden too.Gainsight Customer Success Platform, ChurnZero, Odie (formerly Totango), Planhat, Vitally, Custify, Velaris · checked 2026-10-21 · source 1 · source 2 · source 3
  • Totango now presents itself as Odie and publishes prices only for the Odie products, while still listing the Totango Customer Success Platform. Existing and new buyers cannot tell what the Totango platform costs or how long it will be sold.Odie (formerly Totango) · checked 2026-10-21 · source 1 · source 2
  • Churnkey publishes a price only for Starter, for under $5k monthly churn volume; Core and Intelligence, for $10k and more, are quoted. Teams with more churned revenue cannot see what they will pay.Churnkey · checked 2026-10-21 · source 1
  • Chargebee Retention is now part of Chargebee Growth, whose Enterprise plan is priced on active subscribers without a published rate, and whose free Starter plan is only for Chargebee Billing customers. Buyers on another billing system have no published route in.Chargebee · checked 2026-10-21 · source 1

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