Comparison

Bastle vs Churnkey

Where Churnkey is the better choice, where Bastle is, and what actually differs once you get past the feature lists.

Bastle or Churnkey?

Churnkey is retention infrastructure and it is the best in the category at it: dynamic cancel flows with offers, pauses and plan switches, precision dunning across SMS and in-app channels, and AI that generates flow copy, offers and translations and mines cancellation feedback. Its retention surface is deeper than Bastle's and this is not a close call. Bastle is an analytics product that includes competent retention tooling rather than a retention product with reporting attached, so the real question is which of the two jobs is your bottleneck — and for some teams the answer is genuinely Churnkey plus something else.

Last researched July 2026. See every comparison

In their words

What Churnkey is

Churnkey is retention infrastructure for subscription businesses. It intercepts cancellations with dynamic flows that offer discounts, pauses or plan switches based on who is leaving and why, runs precision dunning across email, SMS and in-app channels, and uses AI to generate flow copy and offers, translate them automatically and mine cancellation feedback for patterns. It publishes strong headline results for churn reduction and payment recovery on its own site.

Honest fit

Which one you should actually pick

Most comparison pages are written so that one answer is always right. These two columns get the same room, the same styling and the same amount of thought.

Choose Churnkey if

Retention is your bottleneck, not measurement. Churnkey's cancel flows are the deepest in the market — dynamic offers, pauses, plan switches, branching by segment — and Bastle's are simpler.
You want AI applied to retention specifically: generated flow copy and offers, automatic translation of the flow, and feedback mining across cancellations. Churnkey ships all of that.
You need multi-channel dunning with heavy per-segment tuning. Churnkey's precision dunning is more configurable than Bastle's campaign sequences.
You already have analytics you trust and are not looking to replace it. Churnkey slots alongside an existing stack rather than competing with it.
You want a vendor whose entire product surface is retention. Focus is a real advantage and Bastle is not focused on this.

Choose Bastle if

Measurement is your bottleneck. Bastle is a full subscription analytics product — 28 metrics, cohorts, segmentation, MRR movement decomposition — and Churnkey is not.
You want to know which churn reason is costing the most MRR, not just which is mentioned most often, and to trace it into cohorts and segments.
You want retention and analytics in one product rather than two vendors and two bills, and Bastle includes both while in beta.
You want plain-English questions answered over your revenue data with the underlying records cited.
You need investor-facing live metric rooms, forecasting or a full metrics API — none of which is what Churnkey is for.

Side by side

Capability by capability

A tick means the capability ships today. A dash means it exists in a narrower or different form. A cross means it is not available. Nothing is marked absent merely because it works differently.

Capability comparison between Bastle and Churnkey
Capability	Bastle	Churnkey
Cancellation interception flowsChurnkey's are dynamic and branch on segment; Bastle's are per-reason	Partial	Yes
Save offers: discount, pause, plan switch	Yes	Yes
AI-generated flow copy and offers	No	Yes
Automatic flow translation	No	Yes
AI cancellation-feedback miningBastle reports reasons costed in lost MRR; Churnkey mines free text	Partial	Yes
Failed-payment recovery across email, SMS and in-app	Yes	Yes
Hosted card-update page writing back to the processor	Yes	Yes
Full subscription metrics suiteMRR, ARR, ARPU, LTV, quick ratio, NRR, cohort retention	Yes	No
Cohort retention and segmentation	Yes	Partial
Plain-English question answering over revenue data	Yes	No
Revenue forecasting	Beta	No
Investor-facing live metric rooms	Yes	No
MCP server and CLI	Yes	No
Years in production	Beta, 2026	Established

Researched July 2026. Competitor capabilities change; corrections welcome.

These are not the same product

Churnkey is retention infrastructure. Bastle is subscription analytics that includes retention tooling. They overlap in the middle — both intercept cancellations, both chase failed payments — and diverge sharply at the edges, so the comparison is really a question about which problem you are solving.

Where Churnkey is better, plainly

Cancel flows. Churnkey's are dynamic: the offer presented depends on who is leaving, what they said and what segment they belong to, with pauses and plan switches alongside discounts, and branching logic underneath. Bastle configures an offer per cancellation reason, which handles the common cases well and is meaningfully simpler than what Churnkey does.

The AI surface is also theirs. Churnkey generates flow copy and offers, translates flows automatically, and mines cancellation free-text for patterns. Bastle's cancellation insights weight each reason by the MRR it took with it and trend reasons over time, which is a different and in our view underrated analysis, but it is not free-text mining and it does not write your copy for you.

Churnkey publishes strong headline figures for churn reduction and payment recovery. We are not going to reproduce or dispute them here; they are vendor claims on their own site, evaluate them the way you would evaluate ours.

Where Bastle is a different tool entirely

Churnkey will not tell you your net revenue retention by cohort, your quick ratio, which plan has the worst six-month retention, or how much of last month's MRR decline was contraction rather than churn. It is not trying to. Bastle is a full analytics product: 28 subscription metrics, cohort tables, stackable segmentation, MRR movement decomposition, investor-facing live metric rooms, forecasting in beta, and a REST API with webhooks, a CLI and an MCP server.

The connection between the two matters more than either in isolation. A cancellation reason in Bastle is a customer attribute, so you can filter metrics and cohorts by why people left and see whether the reason that gets mentioned most is the one costing the most money. Usually it is not.

The stacking question

Plenty of teams will end up running an analytics product and a dedicated retention product, and that is a reasonable architecture. If retention is your acute problem and you already have analytics you trust, Churnkey plus what you have is a better answer than replacing everything with Bastle. If you are buying both from scratch, or if your analytics tool is the thing frustrating you, one product that does both — free while in beta, with no add-on stacking — is worth evaluating.

Who wrote this page

Bastle did, and Bastle benefits if you choose Bastle. That is a bias no amount of good intent removes, so the useful thing is to make it checkable rather than to claim it away. Every capability claim above is specific enough to disprove in an afternoon, the case for the other product gets the same room as the case for ours, and anything that works differently rather than not at all is marked partial.

Read this alongside the other vendor's own documentation, not instead of it. If something here is wrong about their product, tell us: corrections are treated as bugs rather than as debate, the page gets fixed and its research date is reset so you can see it was revised. That applies whether the correction makes them look better or us look worse.

If Churnkey is on your shortlist, these usually are too.

Elsewhere

Bastle vs Churnkey: common questions

Is Churnkey better at retention than Bastle?

Yes, on the depth of the retention surface. Churnkey's cancel flows branch dynamically on segment and behaviour, its dunning is more finely tunable, and it applies AI to generating flow copy and offers, translating flows and mining cancellation feedback. Bastle's retention tooling is competent and included, not best-in-class. If cancel flows are the thing you are optimising, Churnkey is the specialist.

Does Churnkey do subscription analytics?

Not as a full analytics product. It reports on the retention activity it runs and gives you visibility into churn behaviour, but it is not where you go for MRR movement decomposition, cohort retention tables, quick ratio, net revenue retention or segment-level metric analysis. Teams using Churnkey typically pair it with an analytics tool.

Can I use both?

Yes, and for a team with an acute retention problem and existing analytics they trust, that is often the right call. Bastle's cancellation reason API accepts reasons pushed from your own flow, so a Churnkey-run cancellation experience can still land its reasons in Bastle's reporting, where they behave like any other customer attribute and can be used to filter metrics and cohorts.

How does Bastle analyse cancellation reasons?

By cost rather than by count. Every reason is weighted by the MRR it took with it and trended over time, so a slow structural shift is distinguishable from one noisy fortnight, and the reason mentioned most often is separated from the reason doing the most damage — those are frequently not the same. Reasons then behave as a customer attribute, so you can segment metrics and cohorts by why people left. What Bastle does not do is mine free-text feedback with a model, which Churnkey does.

Does Bastle's dunning match Churnkey's?

On channels, largely: both cover email, SMS and in-app messaging with a hosted card-update page that writes the new card back to your payment processor. On tuning, Churnkey's precision dunning is more configurable per segment. Bastle runs delinquency, card expiry and annual renewal as three separate campaigns with their own timing and tone, reports recovered revenue rather than emails sent, and is included in the product rather than priced on performance.

Which should I buy first if I can only buy one?

Whichever addresses your actual bottleneck. If you can already see clearly that voluntary churn is your problem and you know why, buy the specialist retention tool. If you cannot yet tell whether your problem is voluntary churn, involuntary churn, contraction or a weak cohort, buy the measurement first — you cannot fix what you have not located, and Bastle includes enough retention tooling to act on what it finds.

The honest way to choose is to run both.

Connecting Stripe takes about two minutes; Bastle then backfills your complete billing history, so you can put its numbers next to Churnkey's on your own data. Free while in beta, no card required.

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