ProsperStack
Cancel-flow specialist
Starts around $200/mo.
Backstop
Recovery + cancel flow, flat-fee
$79 / mo Pro · $759 / yr annual (−20%) · 0% rev share · 14-day Pro trial, then 10/mo free.
Annual cost calculator
How much would you save?
ProsperStack / yr
$2,400
$200/mo · 12 mo
Backstop Pro / yr
$948
$79 / mo · 0% rev share
You save
$1,452
61% less
Rough numbers — your real cost depends on the competitor's tier mix and your workspace size. Use these as a starting point, not a quote.
Cancel flow + customer portal
Full hosted portal that replaces Stripe billing portal
ProsperStack stops at the cancel flow. Backstop also ships a white-labeled portal — pause, cancel-into-save-flow, update card, switch plan, live plan name.
Visual flow builder
Discount + pause + downgrade + schedule-call offers
Conditional offers by survey answer
Customer testimonials in cancel flow ("Save Stories")
Save-rate analytics with funnel
Reason-code analytics + word-cloud
A/B testing save offers
Weighted traffic splits across flow versions and across offer variants, with a built-in two-proportion significance test on save rate.
Embed on your site (drop-in JS, hosted redirect, or AI install)
Three installs: a one-line embed.js modal on your domain, a no-SDK hosted redirect, or a paste-into-Cursor/Claude prompt.
HMAC-signed embed tokens
Custom domain for the portal
Add portal.yourcompany.com under Settings → Portal domain (CNAME + TXT, click Verify).
Cancel-flow starter templates library
Failed-payment recovery
Smart retries (Stripe-aware)
ProsperStack ships dunning emails (Revenue Recovery) but no native smart-retry engine — retries fall back to Stripe defaults.
4-touch dunning email sequence
ProsperStack added Revenue Recovery — dunning email sequences for failed payments.
Hosted card-update pages
Per-decline-code recovery forecast
Pre-dunning card-expiry warnings
Lifecycle + branding
Reactivation campaigns ("we miss you")
ProsperStack ships Winback Campaigns — automated sequences segmented by churn reason.
Trial-end reminder emails
Win-back tracking
Custom send domain
Cancel-flow logo + brand color
Integrations + dev experience
Public REST API
Outbound webhooks
Slack + Discord notifications
CSV export
Webhook event replay
Pricing
Starting price
Free tier
Includes failed-payment recovery
ProsperStack does dunning comms; Backstop adds a native Stripe-aware smart-retry engine on top.
Annual contract required
Processor support
Migration takes 15 minutes.
See the detailed walkthroughMost ProsperStack customers are already using Stripe Connect, which means our setup is already done. Here's the rest:
Step 1
Connect your Stripe account
One OAuth click, ~30 seconds — we never see your secret key. The Connect grant is read_write (recovery has to retry invoices, apply coupons, and pause/cancel on your behalf), scoped to your account and revocable from Stripe any time. Same account, two tools — no conflict if you keep ProsperStack running during the trial.
Step 2
Recreate your cancel flow
Use our SaaS Standard template as a starting point and adjust the offer terms + survey copy to match your ProsperStack flow. The graph model is the same shape (survey → offer → confirm).
Step 3
Carry over Save Stories
Add your customer testimonials in the Stories node — same use case as ProsperStack's Save Stories. Three quotes is plenty.
Step 4
Install the cancel flow
Pick one of three installs: a one-line embed.js modal on your own domain, a no-SDK hosted redirect link, or a paste-into-Cursor/Claude prompt that wires the snippet for you. Customer experience stays identical; you keep the save rate and add the native Stripe-aware retry engine ProsperStack's dunning doesn't include.
Where ProsperStack wins
ProsperStack has been a cancel-flow specialist longer than us, and the track record shows — their offer-targeting playbook is mature, their integration surface (HubSpot, Salesforce, Klaviyo, Segment) is broad, and their services org is larger. They've added Revenue Recovery (dunning) and Winback Campaigns, so they're a capable retention suite. If your retention lives mostly in the cancel flow, dunning-only recovery is enough, and you don't need a billing-portal replacement, ProsperStack is a focused, proven choice. Use Backstop if you want a native Stripe-aware smart-retry engine and a full hosted portal alongside the cancel flow — on one bill, with a free tier.
Switch when you're sure
Test-drive on free, switch when you're sure.
Run Backstop alongside ProsperStackfor two weeks on the free tier. Compare recovery rates side by side, then move when you're convinced. We export your data on the way out — no lock-in either direction.
Zrionix Technology · founder-led · we read every reply