agentmash vs OpenMail
agentmash and OpenMail are both team communication tools aimed at developers and small businesses. Both have a free plan.
Shared room that warns coding agents before they edit the same file
Email inboxes for AI agents, with replies pushed by webhook
| Pricing | Freemium · $20 | Freemium |
| Starting price | $20/mo | Not published |
| Free plan | Yes | Yes |
| Free trial | 30 days | — |
| Built for | Developers, Small businesses, Enterprise | Developers, Small businesses |
| Platforms | macos, windows, linux | web |
| Country | — | LT |
| Rating | — | — |
Choose agentmash if
Engineering teams where several developers run AI coding agents on the same repository at once.
- Pricing counts developers only, with unlimited agents
- Free for two developers, and Team's first month is free
- Server does not see code unless a room enables diffs
Look elsewhere if: Solo developers or teams that just need a single coding agent (Cursor) without cross-machine coordination.
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).
agentmash vs OpenMail pricing
agentmash
- Free$0Up to 2 developers, 1 private repo, 7 days of history
- Team$20/moPer developer, unlimited private repos, 90 days; $16 billed yearly
- EnterpriseFrom $15,000/yrSelf-hosting from a private Docker image, invoiced
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
agentmash · Key features
- Pre-edit warnings naming the teammate, branch and task behind a change
- Advisory path claims so agents split work before starting
- Strict mode that blocks edits into a teammate's change until acknowledged
- Prompts sent to a teammate's agent that run only after their approval
- Team chat whose latest messages reach every agent before its next prompt
- Lobby desktop app for Mac and Windows running agents side by side
Cons
- Sign-in requires GitHub; GitLab and Bitbucket need extra setup
- No Linux desktop app, only the CLI
- Continue and Zed get MCP tools only, without live edits in the room
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
agentmash vs OpenMail: FAQ
Do agentmash and OpenMail have a free plan?
Yes, both agentmash and OpenMail have a free plan; paid plans add more usage and features.