Can I open-source Boomerang for Gmail?
KINDA · partial or early alternativesKinda. Stalwart and Listmonk cover the core of Boomerang for Gmail, but they're early or partial — expect gaps like team routing and shared inbox rules and abuse response and security operations.
Boomerang for Gmail: Email is infrastructure. Customers pay to avoid lost messages, broken auth, spam problems, and the reputational cost of a flaky inbox.
xteam routing and shared inbox rules
xabuse response and security operations
xcalendar-provider edge cases and timezone correctness
xprovider-grade deliverability
xpush reliability across devices
These projects already replace it, free.
LListmonkHigh-performance single-binary newsletter and mailing list manager with campaigns, templates, and Postgres backendopen source↗SStalwartModern all-in-one mail server in Rust with JMAP, IMAP, and SMTP plus built-in spam filtering.open source↗What each one is, in full: Listmonk · Stalwart
no votes, no pay-to-list · just what's real
Boomerang for Gmail pricing
| plan | monthly | annual (per mo) | what you get |
|---|---|---|---|
| basic | $0/user | $0/user | 10 message credits/month; each message using Send Later, Boomerang, Response Tracking, or Read Receipts consumes a credit |
| personal | — | $4.98/user | Unlimited message credits; Gmail addresses only; includes mobile apps |
| pro | — | $14.98/user | Unlimited message credits; Gmail or Google Workspace; recurring messages and advanced Inbox Pause/Respondable |
| premium | — | $49.98/user | Unlimited message credits; adds track-by-default, CRM integration, Toolbox, priority support, and GQueues Business |
| teams pro | custom | — | Central billing/admin; instant quote for up to 100 users; 100+ users require sales contact |
| teams premium | custom | — | Central billing/admin; instant quote for up to 100 users; 100+ users require sales contact |
| enterprise | custom | — | Custom service agreement, training, professional services, and integrations |
free tier10 message credits/month; credits count messages using Send Later, Boomerang, Response Tracking, or Read Receipts; 30-day Pro trial with no card
billingmonthly + annual; public individual prices show annual equivalents, while exact month-to-month prices are available only during account checkout
hidden costsPersonal is restricted to @gmail.com addresses; Google Workspace accounts require Pro or higher. Paid access applies per subscribed email address. Team pricing is quantity-dependent.
verified 2026-08-12 · source ↗
Can I open-source Boomerang for Gmail?
Kinda. Listmonk covers the core of Boomerang for Gmail, but there are real gaps: team routing and shared inbox rules, abuse response and security operations. Read the honest list above before committing.
How much does Boomerang for Gmail cost?
Boomerang for Gmail's pricing is usage-based or varies by plan · The official pricing URL is recorded, but a stable current amount was not safely recoverable in this pass. Do not publish a number until rechecked..
What do I lose by replacing Boomerang for Gmail?
Honestly: team routing and shared inbox rules; abuse response and security operations; calendar-provider edge cases and timezone correctness; provider-grade deliverability; push reliability across devices. If any of those are load-bearing for you, keep paying.
Is there an open-source alternative to Boomerang for Gmail?
Yes: Listmonk (High-performance single-binary newsletter and mailing list manager with campaigns, templates, and Postgres backend) Stalwart (Modern all-in-one mail server in Rust with JMAP, IMAP, and SMTP plus built-in spam filtering.)