Dataset · prices checked 3 Nov 2026
What cancel-flow tools cost: a dated price table
Churnkey Starter, ProsperStack and Churn Buster list at $200 to $269 a month (Churnkey $250, ProsperStack $200, Churn Buster from $269); CancelFlow starts at $9. Stayput charges 20% of the first renewal a save produces and nothing in a month with no saves; on a $29 plan a flat $250 only becomes cheaper at 44 saves a month.
List prices, read from each vendor's own page
Every row carries its source and the day it was read. Prices change, so the date is part of the data. Machine-readable copy: prices.json (free to cite as “Stayput cancel-flow price dataset, 3 Nov 2026”).
| Tool and plan | Price | Billing basis | Scope | Source | Checked |
|---|---|---|---|---|---|
| Stayput, pay per save | 20% of the first renewal a save produces | Per saved subscriber, taken on a renewal Stripe has already paid | No monthly fee; $0 in a month with no saves | stayput.grain64.com/pricing | 3 Nov 2026 |
| Stayput, early access | Free | No charge | Every feature, up to 100 AI cancel sessions a month, 3 flows, 1 Stripe account | stayput.grain64.com/pricing | 3 Nov 2026 |
| Churnkey Starter | $250 a month billed yearly | flat monthly fee, billed yearly | teams under $5k a month in churn volume; 14-day trial, no card | churnkey.co/pricing | 3 Nov 2026 |
| Churn Buster Cancel flows | from $269 a month | flat monthly fee by MRR tier, month to month, no commissions | price rises with MRR tier | churnbuster.io/pricing | 3 Nov 2026 |
| ProsperStack 50-500 session tier | $200 a month, plus $75 per extra 50 sessions | flat monthly fee by cancel sessions | 50-500 cancel sessions a month | prosperstack.com/pricing | 3 Nov 2026 |
| CancelFlow Three tiers | $9, $25 or $59 a month | flat monthly fee by number of embeds and requests | lowest tier shown; top tier $59 | cancelflow.dev | 3 Nov 2026 |
Break-even: saves a month before a flat fee is cheaper
Stayput's fee per save is 20% of one renewal of your plan. Divide a flat monthly fee by that amount and round up: below that many saves a month, pay per save costs less.
| Your plan price | Stayput fee per save | vs ProsperStack $200 | vs Churnkey Starter $250 | vs Churn Buster $269 |
|---|---|---|---|---|
| $19 | $3.80 | 53 | 66 | 71 |
| $29 | $5.80 | 35 | 44 | 47 |
| $49 | $9.80 | 21 | 26 | 28 |
| $99 | $19.80 | 11 | 13 | 14 |
Worked example: on a $29 plan one save costs $5.80, so 43 saves cost $249.40 and the 44th passes Churnkey's $250. Method and the full comparison: a Churnkey alternative for small Stripe SaaS.
See the decision behind a save
Run a sample cancel session: pick a subscriber, give a reason, and watch the offer, the wording and the Stripe change come back.
90 seconds, no sign-up.