ChatAPI

At a glance

• Editor score
  7.1 / 10
• Pricing
  Open source
• Best for
  Small teams self-hosting a compact chat backend
• Paid from
  Free
• Group chat
  Yes
• Facts checked
  24 Sep 2026

• Where it wins

  • REST and WebSocket APIs support direct and group conversations.
  • Offline queuing, acknowledgements, and webhooks cover message delivery workflows.
  • Single-binary deployment with SQLite; interfaces support PostgreSQL or Redis.

• Where it doesn't

  • Documented SDK coverage is limited to Browser and Node.js, with Go server support.
  • The product is self-hosted rather than a hosted chat service.
  • The published product details do not describe encryption or moderation features.

Our verdict on ChatAPI

ChatAPI is a self-hosted messaging server for developers adding in-app conversations or AI-powered chat. Its REST and WebSocket APIs support direct and group rooms, while presence, typing indicators, message history, and offline queuing cover common chat-backend needs. Small teams that want control over deployment and a compact starting point are the clearest fit; teams looking for a managed service should look elsewhere.

The deployment model is deliberately compact: ChatAPI runs as a single binary with SQLite, and its interfaces allow PostgreSQL or Redis instead. The project is described as open source under the MIT License. Its documented SDK and server options include Browser and Node.js through a TypeScript SDK, plus Go server support. That gives developers a defined route into web apps and Go services, but the verified client ecosystem is narrow for teams needing broad SDK coverage or established integrations.

Delivery and bot workflows are the more distinctive capabilities. ChatAPI describes at-least-once delivery with acknowledgements, and webhooks can notify applications about offline messages. For AI chat, bots can obtain context from a backend webhook and stream LLM responses to room participants. These features make it relevant to teams building support conversations, notification relay, or assistant experiences that can be operated on their own infrastructure. The published details do not establish built-in end-to-end encryption, moderation, or group-size limits, so teams that require those controls should assess alternatives or plan to provide them separately.

Your product? Our editors can test ChatAPI in depth and publish a review, labelled as paid · from $149/mo →

ChatAPI pricing

ChatAPI fact sheet

Alternatives to ChatAPI

• Twilio ConversationsA developer-focused messaging API spanning chat, SMS, MMS, WhatsApp, and Messenger.9.2
• Sendbird ChatA feature-rich chat API for teams that can accommodate paid plans starting at $349 per month.8.8
• Stream ChatBroad chat features and SDK coverage, with paid plans starting at $399 per month billed annually.8.7

See all ChatAPI alternatives →

Featured on iTechGuides

ChatAPI is listed in our Chat Api directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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Last updated 7 Oct 2026 · How we research and update