inbound
API for sending, receiving, and replying to emails programmatically with unlimited mailboxes on your domain.
| What is it | API for sending, receiving, and replying to emails programmatically with unlimited mailboxes on your domain. |
|---|---|
| Pricing | Paid — from $4/mo |
| Free tier | No |
| Platform | API |
| API | Yes |
| Works with | Zapier |
| Best for | building automated email systems, creating support ticket workflows |
| Domain registered | 2025 |
Data updated Aug. 1, 2026
What does inbound do?
inbound is a programmable email infrastructure service that lets developers send, receive, and reply to emails through a simple API. You can add your domain, configure MX records, and immediately start using unlimited email addresses on that domain without individual setup. The service handles all the technical complexities of email delivery and threading automatically.
The platform works by providing API endpoints for sending emails and webhooks for receiving incoming messages. You can route specific email addresses (like support@ or billing@) to different endpoints, or set up a catch-all that forwards everything to a single webhook. Every email preserves threading automatically, and replies maintain proper email headers so conversations stay organized in email clients.
This service is particularly useful for developers building automated email systems, customer support platforms, or AI email agents. It's ideal for startups and product teams that need to handle email programmatically without managing their own email infrastructure. Real-world applications include order management systems, support ticket routing, and automated notification systems that require reliable email communication.
Key features
What makes it stand outWho is inbound for?
Who benefits most from this toolPricing
Default
- 5,000 emails
- 5,000 emails per month
- Basic support
Pro
- 50,000 emails
- 50 domains
- 50,000 emails per month
- 50 domains
Growth
- 100,000 emails
- 200 domains
- 100,000 emails per month
- 200 domains
Scale
- 200,000 emails
- 500 domains
- 200,000 emails per month
- 500 domains
Trust & presence
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