---
title: fmsg
url: https://fmsg.ai/
---

# 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?

| Quality | Email | Work chat (Slack, Microsoft Teams or Discord) | Messaging apps (WhatsApp, Telegram) | fmsg.ai |
| --- | --- | --- | --- | --- |
| Open standard, no lock-in (Based on an open standard that anyone can host. Interoperable with any other host, no vendor lock-in.) | ✓ | ✗ | ✗ | ✓ |
| Verified sender (fmsg verifies the sender between domains, and fmsg.ai also verifies the sender within a domain.) | Depends | ✓ | ✓ | ✓ |
| Tamper-proof (fmsg cryptographically links messages so they can’t be altered in transit or at rest.) | ✗ | ? | ? | ✓ |
| Access controls per address (Governance controls let you control who can message whom, at the domain and individual level) | Depends | Depends | Depends | ✓ |
| Can run on premises (The full fmsg.ai stack can run on your premises, even air-gapped. [Get in touch](mailto:contact@fmsg.ai?subject=fmsg.ai%20on%20premises).) | ✓ | ✗ | ✗ | ✓ |

## Why not email?

fmsg specification, standards and white paper are at [fmsg.org](https://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.

Same 20-message conversation, [source](https://fmsg.org/white-paper/)

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 sub-addresses (e.g. @you\_claude@fmsg.ai or @you\_doorbell@fmsg.ai)
-   Basic rules engine (Per-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 sub-addresses per address (e.g. @john\_claude@yourdomain.com)
-   Management rules engine (Per-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 sub-addresses per address
-   Advanced rules engine (Per-address and domain-wide allow lists, rate limits, per-message cyber scanning)
-   Identity provider integration (Microsoft Entra, Google Workspace or Okta)
-   Advanced message handling (Audit tooling, secure data erasure and retention period control)
-   Level 3 support
-   99.99% SLA

### Add-ons

-   $8 per 32 GB  (/ month)
-   $2 per 10,000 msgs a day  (/ month)
-   $1 additional sub-address  (/ month)

All prices are in US dollars (USD). Sub-addresses pool storage and message quotas with their owner. See the [Terms of Service](https://fmsg.ai/terms) for billing, cancellation and service levels.