Free
$0 / month
For exploration and side projects.
- 3 agents
- 1 custom domain
- 3,000 messages / month
- 1 GiB storage
- SPF / DKIM verification
- Real-time WebSocket delivery
- Includes "Created with e2a" footer
Authenticated email for AI agents. Start free; pay only when you outgrow the limits.
Free
$0 / month
For exploration and side projects.
Starter
$10 / month
For individual builders connecting custom domains.
Pro
$20 / month
For production agents that send daily.
Scale
$99 / month
For agent fleets at production volume.
e2a has four self-serve tiers. Free is $0/month and includes 3 agents, 1 custom domain, and 3,000 messages per month with no card required. Starter is $10/month for 10 agents, 5 custom domains, and 20,000 messages. Pro is $20/month for 25 agents, 10 custom domains, and 50,000 messages. Scale is $99/month for 250 agents, 50 custom domains, and 500,000 messages. Higher volumes are handled through enterprise pricing.
Yes. The Free tier costs nothing and requires no credit card. It covers 3 agents, 1 custom domain, 3,000 messages per month, and 1 GiB of storage, and includes SPF/DKIM verification on inbound mail and real-time WebSocket delivery.
Yes. e2a is open source under Apache-2.0 at github.com/tokencanopy/e2a and can be self-hosted against your own Postgres and outbound mail relay at no license cost. The paid tiers cover the hosted service at e2a.dev, which runs that same codebase.
Both directions count: each message an agent sends and each message it receives counts against the allowance. The allowance is per account rather than per agent, and it resets at the start of each calendar month in UTC.