Your customers
didn't leave.
they drifted.
WinBacker is a tiny, free tool that sends win-back email sequences from your email provider to customers who've gone quiet. No SaaS subscription. No contact limits. No "starting at $99/mo."
Plug in your API key, pick a sequence, paste your contacts. Emails go out from your account — we never touch your credentials.
Three steps. Genuinely.
Plug in your email provider
Paste your Resend, Mailgun, or SMTP credentials. They live in your browser's localStorage and nowhere else. You can wipe them with one click.
Pick a sequence you like
Four categories, three emails each, all written by a human. Edit any of them inline. Or rewrite the whole thing in your own voice.
Paste contacts. Launch.
Drop your email list in, hit send. WinBacker schedules a 3-email sequence over 7 days using your provider. Watch the results come in.
Twelve emails.
Zero buzzwords.
Four categories × three emails. A full 7-day win-back sequence. Written like a person wrote them, because a person wrote them. Use them as-is, or tear them apart.
E-commerce
Three emails for customers who put something in their cart, bought once and vanished, or haven't opened an email in a while.
SaaS
Win-back sequences for users who churned, let a trial lapse, or stopped opening the product. Tuned for product-led teams.
Local Business
Warm, personal win-back emails for the kind of business where you actually recognize the regulars by name.
Subscription
For members who paused, cancelled, or let their plan lapse. Lean on FOMO without being gross about it.
Notes slipped under the door.
"I've been sitting on a list of 2,400 lapsed customers for six months because the cheapest win-back tool was $129/mo. WinBacker let me get it out the door in an hour. Pulled back 47 of them in a week."
"I expected AI slop and found actual emails. The SaaS sequence is almost verbatim what I would have written if I wasn't lazy."
"Set it up between appointments. My clients get a friendly nudge, I get more re-bookings, and I didn't have to learn a whole new app."
Estimated revenue recovered so far
Based on conversions self-reported by WinBacker users. Client-side tally. No analytics overlord involved.
Ready to write
some good mail?
The tool opens in your browser. Nothing installs. You'll be sending a sequence in about five minutes.
Launch the tool →Built by
FlowStack LLC.
A small company that believes useful tools don't need enterprise pricing attached to them.
Learn more →