Abandoned cart, welcome, and win-back automations — the emails that actually make money — built Shopify-first, open source, and self-hostable for the cost of an SMTP provider. Own your data. Stop paying more just because your list grew.
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Email is the highest-ROI channel in e-commerce — around 70% of carts are abandoned (industry average), and a good flow wins a chunk of them back. But the tools that do it well punish you for succeeding.
The more subscribers you earn, the more you pay — every month, forever.
Customer data locked into a vendor, hosted wherever they choose.
Listmonk is newsletter-only; Mautic is heavy. Nobody covers Shopify flows.
The money-making automations, minus the per-contact pricing.
Multi-step flows that bring shoppers back — with the exact items they left, dynamic discounts, and smart timing. The single highest-ROI email in e-commerce.
Greet new subscribers, onboard first-time buyers, and turn one order into two with automated post-purchase sequences.
Automatically re-engage customers who've gone quiet before you lose them for good.
Target by total spend, order count, tags, and behavior — not just a flat list. Send the right message to the right people.
Self-host it and your customer data never leaves your servers. No third party, no vendor lock-in, GDPR-friendly by design.
Pay for a server and an SMTP provider — not a bill that balloons every time your list grows. Growth stops being punished.
Install the Shopify app. Flowmail securely syncs customers, orders, and cart activity in real time via webhooks.
Abandoned cart, welcome, win-back — enabled with sensible defaults. Customize timing, copy, and design when you want.
Emails send themselves, suppress on purchase or unsubscribe, and every recovered order shows up on your dashboard.
Most abandoned carts never come back on their own. Drag the sliders to estimate what an abandoned-cart flow could recover for your store.
Estimate only. Assumes ~70% cart abandonment (industry average) and a ~10% recovery rate from a well-run flow.
| Flowmail | Klaviyo | Listmonk | |
|---|---|---|---|
| Shopify-native flows | ✅ | ✅ | ❌ |
| Abandoned cart / win-back | ✅ | ✅ | ❌ |
| Self-hostable | ✅ | ❌ | ✅ |
| Own your data | ✅ | ❌ | ✅ |
| Pricing | Flat | Per contact | Free |
| Open source | ✅ AGPL | ❌ | ✅ |
Run it yourself for free, or let us host it.
Open source, AGPL-3.0
We host it. You just sell.
Flowmail is open source. Read every line, fork it, self-host it, or contribute. Next.js + TypeScript, Postgres + Prisma, Redis + BullMQ, MJML emails. No black boxes around your customer data.
⭐ Star it on GitHubThe core is open source (AGPL-3.0) and free to self-host forever — you only pay for your own server and email sending. A managed Flowmail Cloud (we host it, handle deliverability) will be a paid option for those who don't want to run it themselves.
Klaviyo is powerful but its price scales with your subscriber count, and your data lives on their servers. Flowmail gives you the money-making e-commerce automations at a flat, predictable cost — and you can keep everything on your own infrastructure.
Listmonk is a great newsletter sender but has no Shopify integration or e-commerce flows. Mautic is a heavy, general-purpose automation suite. Flowmail is purpose-built for Shopify e-commerce automations and stays lightweight.
A small server with Node.js, Postgres, and Redis (there's a docker-compose to make this trivial), plus any SMTP provider for sending. If that sounds like too much, join the waitlist for the managed Cloud.
Pre-alpha and moving fast. The abandoned-cart engine works end-to-end today. Join the waitlist to get early access and help shape what gets built next.
Join the waitlist for early access and Flowmail Cloud.