fmsg

What is fmsg?

Messaging for the AI era.

fmsg.ai gives every person and program an fmsg address they can start messaging each other on, securely and efficiently.

How it compares

Compared to other methods for programmatic messaging, how does fmsg compare?

EmailWork chatSlack, Microsoft Teams or DiscordMessaging appsWhatsApp, Telegramfmsg.ai
Open standard, no lock-inBased on an open standard that anyone can host. Interoperable with any other host, no vendor lock-in.✓✗✗✓
Verified senderfmsg verifies the sender between domains, and fmsg.ai also verifies the sender within a domain.Depends✓✓✓
Tamper-prooffmsg cryptographically links messages so they can’t be altered in transit or at rest.✗✗✗✓
Access controls per addressGovernance controls let you control who can message whom, at the domain and individual levelDependsDependsDepends✓
Can run on premisesThe full fmsg.ai stack can run on your premises, even air-gapped. Get in touch.✓✗✗✓

Why not email?

fmsg specification, standards and white paper are at fmsg.org.

Cost.
Email clients re-send and quote whole thread histories.
Volume.
Emails are bigger, slower to arrive, and have lower sending quotas.
Reliability.
Email has a spam problem.
Cumulative bytes on the wire over a 20-message conversation: fmsg about 104 kB, email about 425 kB 1 2 3 4 5 10 20 messages exchanged (each a reply to the previous) 0 B 100 kB 200 kB 300 kB 400 kB cumulative bytes on the wire fmsg email
Same 20-message conversation, source

Pricing

Start free. Bring your own domain when you're ready.

All plans include

  • Website, desktop and mobile applications
  • Anomaly and loop detection rules engine
  • Everything the fmsg protocol brings: efficiency, sender verifiability and message integrity

Individual

An address on fmsg.ai

$0 free

@you@fmsg.ai

  • 16 GB storage
  • 10,000 messages / day
  • 3 linked addresses, each with its own API keye.g. @you_claude@fmsg.ai or @you_doorbell@fmsg.ai
  • Basic rules enginePer-address allow lists, rate limits
  • Level 1 support

Teams

Your own domain

$3 USD per address / month

@john@yourdomain.com
@sales@yourdomain.com

  • 32 GB storage per address
  • 20,000 messages / day
  • 5 linked addresses for each address, each with its own API keye.g. @john_claude@yourdomain.com
  • Management rules enginePer-address allow lists, rate limits, domain-wide allow lists
  • Level 2 support
  • 99.9% SLA

Organisation

Your own domain and identity provider

$9 USD per address / month

@alice.jones@yourdomain.com
@expenses@yourdomain.com

  • 64 GB storage per address
  • 30,000 messages / day
  • 10 linked addresses for each address, each with its own API key
  • Advanced rules enginePer-address and domain-wide allow lists, rate limits, per-message cyber scanning
  • Identity provider integrationMicrosoft Entra, Google Workspace or Okta
  • Advanced message handlingMerkle checkpointing for a tamper-evident audit trail, secure data erasure
  • Level 3 support
  • 99.99% SLA

Add-ons

  • $8 per 32 GB / month
  • $2 per 10,000 msgs a day / month
  • $1 additional linked address / month

All prices are in US dollars (USD). Linked addresses pool storage and message quotas with their owner. See the Terms of Service for billing, cancellation and service levels.