HelloStack
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A complete email platform for Developers to Send, Receive & Reply

Starting price
$3.50/domain/mo
Social media
@inboundemail

About inbound

inbound is an email infrastructure platform for developers to send, receive, and reply. It serves builders across SaaS, e-commerce, and customer support, providing a unified API and webhooks to manage outbound messages, inbound emails, and automated responses.

inbound screenshot

Key Features

Developers need a single API to handle outbound sending, inbound processing, and automated replies with reliable delivery and organized conversations:

Transactional Email Sending

Deliver confirmations, notifications, and alerts with a reliable sending API; supports templates, bulk sending, and tracking.

Threaded Email Reception

Receive inbound emails via webhooks and automatically organize conversations into threads; access HTML, text, attachments, and headers.

AI Agent Integration for Email

Integrate AI agents to classify, summarize, and reply using full thread context for precise, automated responses.

Unified API & Webhooks

REST endpoints for emails, threads, attachments with typed webhooks, consistent resources, and clear error handling.

Summary

Best for engineering, product, and customer-support teams building onboarding, lifecycle messaging, and automated support workflows.

Plans and prices as listed on inbound.new as of Sep 24, 2026.

Additional domains

$3.50/domain/mo / monthly

Default

$4/mo / monthly

  • 5,000 emails/mo
  • Basic support

Pro

$15/mo / monthly

  • 50,000 emails/mo
  • 50 domains

Additional email capacity

$16/50k emails/mo / monthly

Growth

$39/mo / monthly

  • 100,000 emails/mo
  • 200 domains

Scale

$79/mo / monthly

  • 200,000 emails/mo
  • 500 domains

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