Email & notification APIs
fmsg.ai
Messaging for the AI era
- 0community votes
- 4DR by Ahrefs +3 (up) since last check
Ahrefs Domain Rating listed 6 Nov 2026, relisted 6 Nov 2026.
A messaging platform that gives people and programs fmsg addresses for secure and efficient communication, built on an open standard with sender verification
What it is
fmsg.ai: the homepage
fmsg.ai provides hosted messaging addresses on the open fmsg protocol. It offers fmsg addresses for individuals, organizations, and AI agents, with web, desktop and mobile applications. The platform features sender verification between domains and within domains, cryptographic message linking to ensure messages cannot be altered, and per-address governance controls. Unlike email, fmsg uses efficient binary encoding and domain-distributed architecture to reduce message size and bandwidth requirements.
Listed capabilities
- Addresses on custom domain
- Sub-addresses for AI agents and software
- Sender verification and cryptographic chains
- Message integrity and tamper-proof delivery
- Per-address and domain-wide access controls
- Anomaly and loop detection rules engine
- Web, desktop and mobile applications
- Per-message cyber scanning (Organisation plan)
- Audit tooling and secure data erasure
Pricing
Pricing model: Freemium
Individual: Free with 16 GB storage, 10,000 messages/day, 3 sub-addresses. Teams: $3 USD per address/month with 32 GB storage, 20,000 messages/day, 5 sub-addresses. Organisation: $9 USD per address/month with 64 GB storage, 30,000 messages/day, 10 sub-addresses. Add-ons: $8 per 32 GB/month, $2 per 1
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fmsg.ai metrics
| Metric | Value |
|---|---|
| Domain Rating | 4 +3 (up) since last check |
| Trust Flow | 0 no change since last check |
| Citation Flow | 12 no change since last check |
| Referring domains | 4 no change since last check |
| External backlinks | 6 no change since last check |
Ahrefs Domain Rating listed 6 Nov 2026, relisted 6 Nov 2026. Majestic listed 5 Nov 2026, relisted 5 Nov 2026. Link data listed by Majestic. Trust Flow, Citation Flow and Topical Trust Flow are trademarks of Majestic-12 Ltd.
fmsg.ai domain listing data
Show the listing data
| Domain age | 3 months |
|---|---|
| Registered | |
| Expires | |
| Registrar | Porkbun LLC |
| DNSSEC | Not signed |
fmsg.ai launch receipt entry
| Measure | At launch, then latest |
|---|---|
| Domain Rating (Ahrefs) | 1 first measured 5 Nov 2026 |
| Trust Flow (Majestic) | 0 first measured 5 Nov 2026 |
| Referring domains (Majestic) | 4 first measured 5 Nov 2026 |
Day 1 since launch. Next receipt: day 30, 5 Dec 2026. We show what changed, not what caused it: many things affect these numbers. Nothing here is estimated.
Before you launch
The playbook on SaaS Directory List lists what to prepare, what to post on launch day and where else to list your product.
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Quick answers
What is fmsg?
fmsg.ai gives every person and program an fmsg address they can start messaging each other on, securely and efficiently. It is hosted messaging on the open fmsg protocol with sender verification, message integrity guarantees, and efficient binary encoding.
How is fmsg different from email?
fmsg is more efficient, with significantly smaller message sizes (about 104 kB for a 20-message conversation compared to 425 kB for email), offers cryptographic sender verification, has no spam problem like email, and supports higher sending quotas and faster delivery.
Can I run fmsg on my own servers?
Yes, the full fmsg.ai stack can run on your premises, even air-gapped, and there is an open source fmsg stack such as fmsg-docker available for self-hosting.
Can I use fmsg for AI agents?
Yes, you can give each AI agent its own fmsg address with sub-addresses, and they can be enrolled to your account once the feature launches. The platform is designed to enable AI agents to message each other securely and efficiently.
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