Looking for an alternative?
Three products people leave for Mailbay, and the reasons they give. Each page says when you should stay where you are, and how to move if you do not.
Updated
The alternatives
- An AgentMail alternative with custom domains on the free planAgentMail gives AI agents inboxes, and it does that well. People look elsewhere for a custom domain on the free plan, mail without a footer, or sending and support inboxes in the same product.4 min read
- A Mailosaur alternative for email tests: catch-all inboxesMailosaur is a complete testing product: email, SMS, previews and SDKs for every framework. Teams look elsewhere when the daily email limit, the user seats or the one inbox on the entry plan get in the way.4 min read
- A Resend alternative that takes the same request bodyResend is a polished sending API. People look elsewhere when received mail eats into the sending quota, when 30 days of data is not enough, or when they want agent and support inboxes next to app email.4 min read
How these pages differ from our comparisons
A comparison puts two products side by side, feature by feature. An alternative page starts from the product you use today: what makes people leave it, when they should not, and the steps to move, with the commands we ran to check them. Competitor facts link to the page we read and the date we read it.
Moving an agent? The Claude Code and Cursor integrations show the MCP setup with a real run. Moving tests? The Playwright integration has a complete project. Moving app email? Expect bounce codes you may not have seen before; the SMTP error code reference explains them. What we shipped recently is in the changelog.
Read next
- How Mailbay comparesFive products people weigh Mailbay against, with what each costs, what it does, and where it is the better choice. Every competitor fact links to its source.
- Integrations for everything you shipFrameworks, auth, AI builders, agents, tests and mail apps. Guides were run end to end; a tile that works today opens its snippet; coming soon means not built yet.
Join the beta
Mailbay is in private beta and free while the beta runs: inboxes, sending, your own domains and MCP. We invite people in small batches and read every note on the form.