Compare · Churn Buster
Updated September 2026
Keep vs Churn Buster: involuntary churn vs silent churn.
Churn Buster fights involuntary churn — failed payments — and saves customers at the cancel button. Keep catches the earlier signal: paying customers whose usage is fading, weeks before they reach the cancel button.
Side by side
| — | Keep | Churn Buster |
|---|---|---|
| Core job | Detect at-risk paying accounts from usage | Recover failed payments and save cancellations |
| Failed-payment recovery | No — alerts your team | Yes — retries, email, SMS, card-update page |
| Cancel flows | No | Yes, with offers by cancel reason |
| Product usage data | Yes — PostHog or activity API | Not listed |
| Slack | Usage-risk and billing alerts | Recovery alerts, digests, high-value opportunities |
| Billing sources | Stripe, AbacatePay, Asaas | Stripe, Braintree, Chargebee, Recurly, Paddle, and more |
| Pricing | From $39/month (Starter), by monitored MRR; every feature in every plan | From $269/month for dunning or cancel flows; $430/month for both |
Two kinds of churn
Involuntary churn is the customer who wanted to stay and whose card failed. Recovering it is mechanical — retry at the right time, ask for a new card — and Churn Buster specializes in exactly that.
Silent churn is the customer who stopped getting value, keeps paying for a while, and then cancels on purpose. There is no failed charge to react to; the only early signal is usage. That is what Keep watches.
When to use which
If failed payments are a large share of your churn, a recovery tool like Churn Buster pays for itself first. If most of your churn is customers deciding to leave, you need to see the usage decline before the decision — Keep is built for that. Teams with both problems run both.
Questions
- Does Keep recover failed payments?
- No. Keep sends an alert with the amount and attempt number when a payment fails, so someone can reach out. Automatic retries and dunning are Churn Buster's job.
- Can Keep and Churn Buster run on the same Stripe account?
- Yes. Keep never changes anything in Stripe, so it does not interfere with a recovery tool.
Other comparisons
Catch churn before the cancel button.
Connect Stripe and PostHog and see which paying accounts are fading.