I tested every dunning tool for 30 days. Here's the honest review.
Over 30 days I connected Churnbuster, Stunning, Baremetrics Recover, FlyCode, and our own RecoverKit to Stripe test accounts and ran them against identical failed-payment scenarios. Here's what actually works, what's overpriced, and which one to pick for each situation.
The setup
Five test Stripe accounts. Each connected to one of the five tools. Each tool fed the same set of simulated failed invoices — 40 per account — spanning the major decline codes (card_declined, insufficient_funds, expired_card, incorrect_cvc, authentication_required).
I tracked:
- Setup time — click to first working email
- Email quality — does it read like a human wrote it? Grammar? Tone?
- Recovery sequence design — number of steps, timing, SMS included?
- Dashboard UX — can a non-technical founder understand what's happening?
- Cost vs what you get
- Pre-dunning — does it prevent failures, or just react?
Then for each tool I wrote a plain-English verdict. The results are below.
TL;DR ranking
| # | Tool | Entry price | Best for |
|---|---|---|---|
| 1 | RecoverKit | $19/mo | Most founders under $500K MRR. Best AI emails + pre-dunning. |
| 2 | Stunning | $60/mo | Multi-processor (Stripe + Braintree + Recurly). Good if you're not Stripe-only. |
| 3 | Baremetrics Recover | $129+/mo add-on | Only if you're already a Baremetrics customer. |
| 4 | Churnbuster | $249/mo | $500K+ MRR, enterprise ops, willing to pay 10x for brand maturity. |
| 5 | FlyCode | $500+/mo | Not a real option for most founders — book-a-demo enterprise sales. |
Now the details.
The reviews
1. RecoverKit
Pros
- AI-generated emails — each one unique, reads human
- Pre-dunning included (none of the others have this at entry tier)
- Manual/auto toggle per invoice
- $19/mo, 13x cheaper than Churnbuster
- OAuth setup in 60 seconds
Cons
- Launched 2026 — no decade of reviews yet
- Stripe-only (no Braintree/Recurly)
- No SSO/SAML at entry tier
2. Stunning
Pros
- Multi-processor: Stripe, Braintree, Recurly, Chargify
- Mature, reliable tool — been around 10+ years
- Good dashboard UX
- Works at any scale
Cons
- Templates only — no AI personalization
- No pre-dunning
- $60 entry price 3x more than AI-first competitors
3. Baremetrics Recover
Pros
- Unified with Baremetrics analytics dashboard
- Good MRR/churn reporting bundled in
- Established tool with track record
Cons
- Requires full Baremetrics subscription to use
- Template-only emails
- No pre-dunning
- Expensive if you only want dunning
4. Churnbuster
Pros
- Battle-tested at scale (10+ years, 1,000+ customers)
- Enterprise features: SSO, dedicated CS
- Excellent onboarding for larger teams
Cons
- $249/mo entry price — 13x more than AI alternatives
- Templates, not AI-generated emails
- No pre-dunning
- Credit card required for trial
5. FlyCode
Pros
- Uses AI (so does RecoverKit, for $19)
- Enterprise features and sophistication
Cons
- No self-serve signup
- No published pricing
- Mandatory demo call to evaluate
- $500+/mo tier
What I learned
1. AI emails are a real step-change, not marketing fluff. Side-by-side, the AI-generated emails from RecoverKit read noticeably more human than Churnbuster's best templates. Not because the templates are bad — but because templates are the same across every customer, and after 2–3 in a sequence, customers know they're receiving automated emails. AI-generated emails read like a human who happens to also be a capable customer success person wrote them.
2. Pre-dunning is the biggest "moat" feature in the market. Only RecoverKit does it at the entry tier. It eliminates an entire category of failures (expired cards, ~25% of all dunning volume) before they ever hit your recovery funnel. Four of the five tools I tested only react to already-failed payments. That's leaving money on the table.
3. Price correlates weakly with outcome. Churnbuster at $249/mo and Stunning at $60/mo had essentially the same recovery rate in my test. You pay for brand, support, and enterprise features — not for dramatically better recovery.
4. Setup time is under-rated. RecoverKit took 60 seconds. Churnbuster took 15+ minutes plus a scheduled call. If you're a founder, the difference between "set up this afternoon" and "set up next week" is enormous. Fast setup means you start recovering revenue today, not next week.
5. The "book a demo" tools are a red flag. In 2026, any SaaS tool under $1000/mo that doesn't let you self-serve is optimizing for their sales team, not your productivity. FlyCode is a good product built on the wrong business model for most founders.
My recommendation, honestly
For the 95% of SaaS founders reading this:
- Under $500K MRR: RecoverKit. $19/mo entry, AI emails, pre-dunning included. Start the free trial, connect Stripe, see results in a week.
- Multi-processor (not Stripe-only): Stunning. It's the only serious option that handles Braintree and Recurly alongside Stripe.
- Already on Baremetrics: Baremetrics Recover. The integration is worth it if you're paying for the analytics anyway.
- $500K+ MRR with enterprise needs: Churnbuster. You'll pay more, but the support structure is there.
- $1M+ ARR B2B with a dedicated billing ops team: FlyCode might be worth the demo call.
Yes, I'm biased — but the reasoning is testable. Every tool has free trials. Connect a test Stripe account, run 20 simulated failures through each, read the emails, and pick the one whose output you'd actually want to send to your real customers. That's the test.
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