TLDR: Failed payments are 20-40% of total SaaS churn. The best dunning tool depends on your scale:
- Under $30K MRR: Stripe Smart Retries (free, built in)
- $30K-$200K MRR: Churnkey ($199/mo) — best ROI
- $200K+ MRR: Churnkey + specialist setup
- Non-Stripe billing: Churnkey (multi-processor) or Recurly's built-in
Dunning is the highest-ROI lever in SaaS churn reduction. A team with $50K MRR and 30% involuntary churn is losing roughly $5K/month to failed payments. Recovering even half of that pays for any dunning tool 5-10x over.
Why dunning matters more than you think
The math is brutal. In most SaaS businesses:
- 20-40% of total churn is involuntary (failed payments, not customer choice)
- Of those failed payments, 60-80% are recoverable with the right system
- Most teams recover only 15-25% because they're using defaults
That means a meaningful chunk of your "churn" is actually a billing problem you can fix in weeks. See the full breakdown in our AI dunning guide.
Quick comparison: top dunning tools for Stripe
| Tool | Best for | Recovery rate | Price |
|---|---|---|---|
| Stripe Smart Retries | Under $30K MRR | 30-40% | Free |
| Churnkey | $30K-$500K MRR | 45-55% | From $199/mo |
| Recoverly | Mid-market specialist | 45-55% | From $199/mo |
| ProfitWell Recover | Already in Paddle suite | 35-45% | ~$200/mo |
| Stunning | Email-focused recovery | 30-40% | From $79/mo |
| Recurly built-in | If you're on Recurly | 40-50% | Included with Recurly |
The winner: Churnkey for $30K+ MRR
If you're past $30K MRR, Churnkey is the dunning tool I recommend most often. Three reasons:
- Higher recovery rate. 45-55% recovery vs Stripe Smart Retries' 30-40%. That gap compounds.
- Customer-side recovery. Customers get a landing page where they can retry the card themselves. This pattern recovers 15-25% more than vendor-side retries alone.
- Cancellation flow integration. Churnkey also handles cancellation save flows. One vendor, two churn levers.
The pricing math: $199/month base. A team at $50K MRR with 30% involuntary churn loses ~$5K/month to failed payments. Churnkey recovering an additional 10-15% over Stripe Smart Retries saves $500-$750/month — pays back in under a month.
Setup takes 1-2 weeks done properly. Most teams report results within the first month.
Runner-up: Stripe Smart Retries (free)
For teams under $30K MRR, Stripe Smart Retries is the right answer. It's free, built into Stripe Billing, and recovers 30-40% of failed payments with zero setup.
The case for paying for Churnkey instead doesn't make sense at small scale. Smart Retries' 30-40% recovery on $5K/month of failed payments saves $1500-$2000. Churnkey's marginal improvement at this scale doesn't justify the $199/month.
Upgrade to Churnkey when your involuntary churn losses exceed roughly $1500-$2000/month.
Other strong picks
Recoverly — Churnkey's main competitor
Recoverly is comparable to Churnkey in recovery rate and pricing. Generally a coin flip between the two — both are good. Pick based on UX preference after running trials.
Stunning — for email-heavy recovery
Stunning at $79/month is cheaper than Churnkey but more focused on email-driven recovery. Recovery rates are closer to Smart Retries than Churnkey. Right pick for teams that want better emails on top of Smart Retries.
ProfitWell Recover — if you're already in Paddle's suite
If you're on ProfitWell for metrics and want a one-vendor stack, Recover at ~$200/month is fine. It's not as strong as Churnkey but the integration with ProfitWell metrics is convenient. See ProfitWell alternatives for the full case.
When to skip dunning tools entirely
- Under $5K MRR: Use Stripe Smart Retries free. Don't pay for anything.
- If involuntary churn is under 10% of total churn: Your dunning is probably fine. Focus elsewhere.
- If you don't know your involuntary churn rate: Measure first. Most teams overestimate the problem.
Run the Churn Health Check to see if dunning is actually your biggest churn lever.
The full payment recovery stack
The strongest setup I see for $50K-$500K MRR SaaS:
- Stripe Billing as the billing platform
- Stripe Smart Retries as the baseline retry logic
- Churnkey on top for AI retries, customer landing pages, and cancellation flows
- Proactive card expiration outreach 30 days before cards expire (see the experiment)
This stack typically recovers 50-65% of failed payments — roughly 2x what most teams achieve with defaults.
Final recommendation
- Under $30K MRR: Stripe Smart Retries. Free, effective, done.
- $30K-$200K MRR: Churnkey. Best ROI in the category.
- $200K+ MRR: Churnkey + dedicated CSM time on payment recovery.
- Non-Stripe billing: Churnkey (multi-processor) or Recurly's built-in dunning.
- Already in Paddle suite: Recover is fine but Churnkey is better.
How I picked these
I run ChurnTools and track dunning recovery rates across 30+ SaaS teams in 2025-2026. Rankings based on:
- Direct conversations with 30+ founders using one or more of these tools
- Hands-on testing of Churnkey, Smart Retries, and Recoverly
- Self-reported recovery rates verified against billing data
- Recent 2025+ reviews on G2 and Capterra
The rest of your churn stack
- Cancellation flows: Save flow guide
- Health scoring: Health scores guide
- Reduce churn end-to-end: 12 tactics ranked by ROI
- Score your gaps: Churn Health Check
Frequently asked questions
What is the best free dunning tool for Stripe?
Stripe Smart Retries. Built into Stripe Billing, recovers 30-40% of failed payments.
How much can dunning tools actually recover?
Smart Retries: 30-40%. Churnkey/Recoverly: 45-55%. Custom setups: 35-45%.
Is Churnkey worth $199/month over Smart Retries?
For teams over $30K MRR, almost always yes. Pays back in under a month.
Should I use ProfitWell Recover or Churnkey?
Churnkey, meaningfully. 10-20% better recovery in head-to-head tests.
How long to set up dunning?
Smart Retries: 5 minutes. Churnkey: 1-2 weeks. Recover: 1-3 days.