# openimsdk/open-im-server

IM Chat OpenClaw

Repository: https://github.com/openimsdk/open-im-server
Canonical: https://ross.abutalabs.com/products/open-im-server
Homepage: https://openim.io
Language: Go
License: Apache-2.0
License Family: permissive
Topics: im, chat, messaging, messenger, openclaw
Last push: 2026-08-26T03:24:16+00:00

## Health v2 (maintenance only)
Score: 87/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 99, release rhythm 63, longevity 100
- inputs: {"age_days": 1925, "days_push": 7, "days_rel": 167, "gap_med": 42, "n_releases_24m": 14}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 16616, forks 2946 (observed 2026-08-28T04:11:16.856048+00:00)

## What it is
OpenIM Server is an open-source instant messaging backend written in Go that powers in-app chat, group messaging, and voice/video calling. It exposes REST Platform APIs and WebSocket connections for multi-platform client SDKs (Web, iOS, Android, Flutter, React Native, Electron) and supports self-hosted deployment.

## Use cases
- build an in-app chat feature with 1:1 and group messaging
- self-host a WhatsApp/Telegram-style messaging backend
- add offline messages, history sync, and read receipts to my app
- integrate voice and video calls into a mobile app
- send system notifications to users from my backend via server API
- support large-scale group chats with high concurrency
- embed a chat SDK in a Flutter or React Native app

## When to choose
- you need full control over messaging data via self-hosting
- you want an open-source alternative to Twilio, Sendbird, or Firebase Chat
- you need multi-platform SDKs backed by one server
- you require large-group and high-concurrency messaging at scale

## When to avoid
- you only need a simple chat UI without backend infrastructure
- you want a fully managed SaaS with zero server maintenance
- your team cannot operate Go services, databases, and message queues
- you need a turnkey end-user chat app rather than developer infrastructure

## Facets
- artifact type: service
- maturity: stable
- function: websocket, http-server, api-framework, message-queue, auth, sdk
- domain: messaging-platforms, self-hosted, backend, apis
- platform: go, self-hosted, cross-platform
- tags: instant-messaging, chat-server, real-time-communication, voice-video, open-source-im, group-chat, offline-messages, messaging, real-time, docker, web-server

## Member repositories
- openimsdk/open-im-server (main) score 87

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:11:16.856048+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T17:04:50.531090+00:00, confidence not recorded.
  - readme: https://github.com/openimsdk/open-im-server (fetched 2026-08-28T04:11:16.856048+00:00, sha 8937301ff5cd)
  - homepage: https://openim.io (fetched 2026-08-29T08:02:07.652032+00:00, sha 329738c45c39)
  - site_page: https://docs.openim.io/ (fetched 2026-08-29T08:02:07.655249+00:00, sha 26dec0a42adf)
  - site_page: https://openim.io/resources (fetched 2026-08-29T08:02:07.657734+00:00, sha 96734ad226f5)
- Data as of 2026-08-30T08:39:29.467469+00:00.