Developer Tools vs OpenMail
Developer Tools and OpenMail are both developer tools tools. Developer Tools is aimed at freelancers and small businesses, while OpenMail is aimed at developers and small businesses. Both have a free plan.
Developer Tools
173 free web, DNS, SSL, SEO & developer tools — fast, live, no sign-up
OpenMail
Email inboxes for AI agents, with replies pushed by webhook
| Pricing | Free | Freemium |
| Starting price | Not published | Not published |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Built for | Freelancers, Small businesses, Developers | Developers, Small businesses |
| Platforms | web, ios, android, macos, windows, linux | web |
| Country | TR · 2015 | LT |
| Rating | — | — |
Choose Developer Tools if
Choose OpenMail if
Developers building AI agents that need their own email address to receive, thread and answer mail.
- Built for receiving and replying, not only sending
- Each inbox has its own sending reputation
- Free plan needs no credit card
Look elsewhere if: Teams that mainly send marketing or transactional email at high volume (Resend, MachineMail).
Developer Tools vs OpenMail pricing
Developer Tools
OpenMail
- Free€0/mo3 inboxes, 3,000 emails/mo (100/day), 3 GB, openmail.sh addresses
- Pro€9/mo10 inboxes, 10,000 emails, custom domains; then usage-based
- EnterpriseCustomDedicated sending IPs, SSO, 1-hour SLA, custom DPA
Developer Tools · Key features
OpenMail · Key features
- One API call or CLI command creates a dedicated agent inbox
- Inbound mail delivered in real time over webhook or WebSocket
- Full email threading so agents reply in the same conversation
- PDF, CSV and image attachments parsed into plain text (extra cost)
- Allow and block rules per address or domain
- Custom domains with DKIM, SPF and DMARC on Pro
Cons
- Pricing page mixes $9 and €9; overage rates are in euros
- Free plan caps sending at 100 emails a day
- Free plan appends a "Sent with OpenMail" footer
Developer Tools vs OpenMail: FAQ
Do Developer Tools and OpenMail have a free plan?
Yes, both Developer Tools and OpenMail have a free plan; paid plans add more usage and features.