e2a
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| Starter | 10 agents · 5 custom domains · 20,000 sends/month · 5 GiB storage · SPF/DKIM verification · approval workflow · webhook and WebSocket delivery · email support | $10 a month |
| Inbox add-on | +1 inbox · +3,000 sends/month · removes Free daily send cap | $2 a month |
| Pro | 25 agents · 10 custom domains · 50,000 sends/month · 10 GiB storage · approval workflow · webhook and WebSocket delivery · email support | $20 a month |
| Scale | 250 agents · 150 custom domains · 200,000 sends/month · 100 GiB storage · Pro features · priority support | $99 a month |
| Free | 3 agents · 3 custom domains · 3,000 sends/month · 20 sends/day · 1 GiB storage · SPF/DKIM verification · WebSocket delivery · e2a footer | On request |
As e2a.dev lists them, read 8 Oct 2026. The maker's own page has the final word.
Facts from e2a's own pages
- Agent inboxes
- Agents can have dedicated two-way email addresses on the shared agents.e2a.dev domain or a verified custom domain. · e2a.dev, 8 Oct 2026
- Delivery options
- Inbound mail can reach agents through MCP, signed webhooks, WebSocket, REST polling, or the TypeScript and Python SDKs. · e2a.dev, 8 Oct 2026
- Email authentication
- e2a evaluates SPF, DKIM, and DMARC on inbound messages and provides the results as structured evidence. · e2a.dev, 8 Oct 2026
- Human approval
- An optional per-agent approval gate can hold outbound messages for review, with configurable expiry behavior. · e2a.dev, 8 Oct 2026
- Integrations
- The maker documents MCP access and TypeScript and Python SDKs, and says outbound mail can use Amazon SES or Resend as an upstream relay. · e2a.dev, 8 Oct 2026
- Pricing limits
- Only outbound mail counts toward allowances, each recipient counts as one send, and inbound mail is free and unmetered. · e2a.dev, 8 Oct 2026
- Privacy
- The privacy page says e2a stores message headers, bodies, and attachments and does not train models on mail. · e2a.dev, 8 Oct 2026
- Product
- e2a is an open-source email API for applications and AI agents, available as hosted service or self-hosted Apache-2.0 software. · e2a.dev, 8 Oct 2026
- Security screening
- Optional inbound screening can flag prompt-injection payloads and route messages to allow, review, or block. · e2a.dev, 8 Oct 2026
- Self-hosting
- The maker says e2a can be self-hosted with a customer-managed Postgres database and outbound mail relay at no license cost. · e2a.dev, 8 Oct 2026
- Shared-domain sending
- Sending to other recipients from the shared e2a domain requires a one-time approval request; paid tiers do not waive this review. · e2a.dev, 8 Oct 2026
- Supported MCP clients
- The MCP page says e2a is tested with Claude Code, OpenAI Codex, Cursor, Windsurf, Claude Desktop, and VS Code with GitHub Copilot. · e2a.dev, 8 Oct 2026
- Transactional email
- Applications can send transactional email through the HTTP API or TypeScript and Python SDKs without an agent framework. · e2a.dev, 8 Oct 2026
- Use cases
- The maker describes support, receptionist, scheduling, e-commerce, sales, recruiting, voice follow-up, and procurement workflows. · e2a.dev, 8 Oct 2026
Where e2a stands on Freedom251
- Email APIs#1 of 31