Inbound
Programmable email infrastructure for sending, receiving, replying, and threading emails via a simple API and TypeScript SDK.
At a Glance
Pricing
Engagement
Available On
Listed Mar 2026
About Inbound
Inbound is a programmable email infrastructure platform that lets developers send and receive emails programmatically using a clean API and TypeScript SDK. You can add your own domain, configure MX records, and instantly get unlimited mailboxes with no per-address setup required. Inbound supports full email threading, webhook delivery under 100ms, and a Resend-compatible API for easy migration.
- Send Emails — Send transactional emails from any address on your domain using the TypeScript SDK or REST API.
- Receive Emails via Webhooks — Route incoming emails to dedicated endpoints or a catch-all webhook; webhooks are delivered typically under 100ms with exponential backoff retries.
- Full Threading Support — Reply programmatically and Inbound automatically manages headers so responses appear in the correct thread.
- Unlimited Mailboxes — Add your domain once and receive at any address on it without configuring each mailbox individually.
- Custom Domain Routing — Route specific addresses (e.g., support@, billing@) to dedicated API endpoints or set up a catch-all for your entire domain.
- Spam Filtering — Incoming email is run through spam detection; configure your mailbox to reject, flag, or accept spam.
- Resend-Compatible API — Migrate from Resend with minimal code changes thanks to a compatible SDK design.
- MCP Server Integration — Connect Inbound to AI agents and workflows via the built-in MCP server integration.
- TypeScript SDK — Install via
bun install inboundemailor npm; full type safety and first-class TypeScript support out of the box. - Better Auth Integration — Native integration with Better Auth for authentication workflows.
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Pricing
Default
Entry-level plan with 5,000 emails/mo and basic support.
- 5,000 emails/mo
- Basic support
Pro
50,000 emails/mo with up to 50 domains.
- 50,000 emails/mo
- 50 domains
Growth
100,000 emails/mo with up to 200 domains.
- 100,000 emails/mo
- 200 domains
Scale
200,000 emails/mo with up to 500 domains.
- 200,000 emails/mo
- 500 domains
Additional Domains
Add extra domains beyond your plan's included limit.
- 1 additional domain per add-on
Additional Email Capacity
Add 50,000 extra emails/mo beyond your plan's included limit.
- 50,000 additional emails/mo
Capabilities
Key Features
- Send transactional emails via API
- Receive emails via webhooks
- Full email threading support
- Unlimited mailboxes per domain
- Custom domain routing
- Catch-all webhook routing
- Spam filtering and detection
- Resend-compatible API
- TypeScript SDK
- MCP Server integration
- Better Auth integration
- Exponential backoff webhook retries
- Real-time email delivery