Free
$0 / month
For exploration and side projects.
- 3 agents
- 3 custom domains
- 3,000 sends / month
- 20 sends / day (lifted by any add-on)
- 1 GiB storage
- SPF / DKIM verification
- Real-time WebSocket delivery
- Includes "Created with e2a" footer
Send transactional email from any product, give agents real two-way inboxes, and keep people in control. Hosted plans start free, or run the Apache-2.0 stack yourself.
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.
Every plan includes transactional sending, webhooks, WebSockets, structured SPF / DKIM / DMARC evidence, and optional human approval. Plans differ by quotas, branding, and support. Allowances count outbound sends only — one send per recipient, per account, resetting at the start of each calendar month (UTC); inbound mail is free and unmetered on every plan.
Add-on
$2 / month per inbox
Extra capacity on any tier — including Free.
e2a has four self-serve tiers, plus a $2/month inbox add-on available on every tier. Free is $0/month and includes 3 agents, 3 custom domains, and 3,000 sends per month with no card required. Starter is $10/month for 10 agents, 5 custom domains, and 20,000 sends. Pro is $20/month for 25 agents, 10 custom domains, and 50,000 sends. Scale is $99/month for 250 agents, 150 custom domains, and 200,000 sends. Inbound mail is free and unmetered on every tier. Higher volumes are handled through enterprise pricing.
Yes. The Free tier costs nothing and requires no credit card. It covers 3 agents, 3 custom domains, 3,000 sends per month (up to 20 sends per day), and 1 GiB of storage, and includes SPF/DKIM verification on inbound mail and real-time WebSocket delivery. Received mail is free and unmetered, and buying any inbox add-on removes the daily cap.
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.
Only outbound mail counts. Each recipient of a sent message counts as one send, so a message to 3 recipients uses 3 sends. Received mail is free and unmetered. The allowance is per account rather than per agent, and it resets at the start of each calendar month in UTC.
Yes. The inbox add-on costs $2/month per inbox, and each one also adds 3,000 sends per month to your account's shared pool. It is available on every tier, including Free, and buying any add-on removes the Free plan's 20 sends per day cap (the "Created with e2a" footer stays with the Free plan). You can adjust the quantity at any time; added units are charged prorated for the rest of the month, and reductions apply immediately with no partial-month refund.
Every account can email its own verified address and its own agent inboxes right away. Emailing other recipients from the shared e2a domain requires a one-time approval: file a short request from the dashboard (or via the CLI or MCP server) and an operator reviews it, usually the same business day. Paid tiers raise your sending allowance but do not replace this review. Self-hosted deployments choose their own policy.