toolgrep / Email & messaging / mails0
Alternatives to mails0
mails0: Open-source email API for AI agents. 8 products similar to mails0, 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, 8 of 8 offer an MCP server.
- Cooper Email
HTTP email API that gives each AI agent its own inbox
- Faivelo
Email for AI agents: agent inboxes with REST API, webhooks and MCP
- Atomic Mail
Email API for AI agents
- emailvalidation.io
Email validation API: verify email addresses with syntax, MX record and SMTP mailbox checks, plus bulk list verification.
- Mailsac
Disposable test email addresses for QA and developers
- Fluxmail Cloud
Hosted email access for agents
- Mailjet
Email marketing software and email API for marketing and transactional email
- Layrcake
Go-to-market infrastructure for AI agents
Side by side
| Product | Pricing | Free tier | API | MCP server | SDK | Open source |
|---|---|---|---|---|---|---|
| mails0 | Free | yes | yes | yes | yes | yes |
| Cooper Email | Freemium · from $0 | yes | yes | yes | — | no |
| Faivelo | Freemium · from $0 | yes | yes | yes | yes | no |
| Atomic Mail | Free | yes | yes | yes | yes | — |
| emailvalidation.io | Freemium · from $0 (Free plan, 100 validations/month); paid plans from $8.99/month | yes | yes | yes | yes | no |
| Mailsac | Freemium · from 0 | yes | yes | yes | yes | no |
| Fluxmail Cloud | Freemium · from $10/month (Pro, per pricing page; the /cloud page states $15/month) | yes | yes | yes | no | no |
| Mailjet | Freemium | yes | yes | yes | yes | no |
| Layrcake | Freemium | yes | yes | yes | yes | 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
curl https://toolgrep.com/api/products/mails0/alternatives