toolgrep / Testing & QA / Mailsac
Alternatives to Mailsac
Mailsac: Disposable test email addresses for QA and developers. 8 products similar to Mailsac, compared on pricing, free tier, API, MCP server, SDK and open source. 8 of 8 have a free tier, 8 of 8 have an API, 3 of 8 offer an MCP server, 1 of 8 is open source.
- Mailinator
Email and SMS workflow testing for developers and QA teams
- isitdisposable.com
Disposable email address detection via a drop-in JavaScript snippet and a REST API.
- UserCheck
Email and domain intelligence API for detecting disposable and fake emails
- Mailtrap
Email delivery platform for developer and product teams: Email API/SMTP sending, email testing sandbox, and email marketing.
- EmailLabs
Cloud-based SMTP service and email API for sending and tracking transactional and marketing emails
- Reloop
Open-source email API and infrastructure for developers: transactional email, SMTP relay, campaigns, webhooks, and agent inboxes.
- Disban
Email-domain classification API that detects disposable, free, alias, testing and parked domains at signup.
- Mail-Tester
Test your emails for spam score and configuration problems
Side by side
| Product | Pricing | Free tier | API | MCP server | SDK | Open source |
|---|---|---|---|---|---|---|
| Mailsac | Freemium · from 0 | yes | yes | yes | yes | no |
| Mailinator | Freemium | yes | yes | no | yes | no |
| isitdisposable.com | Freemium · from $0/month (Free plan, 250 lookups); paid plans from $19/month | yes | yes | no | no | no |
| UserCheck | Freemium · from $0/month | yes | yes | no | yes | no |
| Mailtrap | Freemium · from $15 | yes | yes | yes | yes | no |
| EmailLabs | Freemium · from 0 PLN/month (Startup plan, up to 9,000 emails/month, 300 emails/day limit); paid plans from 99 PLN/month (Essential 30, up to 100,000 emails/month) | yes | yes | no | yes | no |
| Reloop | Freemium · from $0 | yes | yes | yes | yes | yes |
| Disban | Freemium | yes | yes | yes | yes | — |
| Mail-Tester | Freemium | yes | yes | no | no | no |
Facts come from each product's own website, or from its verified owner when they have edited the listing. Each product page shows when it was last verified and how it was extracted. Similarity comes from the products' descriptions.
API
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