OpenIM

openim.io · checked 8 Oct 2026

#12 · Chat APIs

Visit openim.io ↗ Alternatives OpenIM vs Scaledrone

How it plugs in

—Public API

NoOpen source

YesFree tier

Signal on Chat APIs6.2#12 of 32

OpenIM provides communication infrastructure for developers to add chat, messaging, voice calls, and video meetings to applications.

Pricing

Open Source IMSDKOpenIM Server · IMSDK · messaging · groups and contacts · self-hosted deployment · demo appsFree
BusinessProduction-ready client UI · multi-platform clients · commercial license · self-hosted deploymentOn request
EnterpriseAdvanced messaging · voice and video · video meetings · Kubernetes deployment · high availabilityOn request

As openim.io lists them, checked 8 Oct 2026.

Near it

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Runs on

Web
Windows
Mac
Linux
iOS
Android

Facts

Website: openim.io
Price: Free tier
Free trial: Yes
Backend integration: Server APIs support backend management of users, groups, and messages, while webhooks provide event callbacks.
Community support: The OpenIM community page offers Slack discussions and community support for development questions and project rollout.
Deployment: OpenIM supports self-hosted deployment, and the Enterprise page says Enterprise can run in a customer's cloud, private network, or production environment.
Enterprise modules: Voice & Video and video meetings are separate modules purchased as needed and are not included in Enterprise by default.
Large groups: OpenIM says its groups can support up to 100K members.
Messaging features: Messaging features include text, image, voice, video, file, location, contact card, and custom messages, plus offline messages, history, and multi-device sync.
Not a standalone chat app: OpenIM provides SDKs, Server APIs, webhooks, and server-side components rather than a single chat app.
SDK integrations: The maker lists SDKs for iOS, Android, JavaScript, Flutter, React Native, uni-app, Electron, C/C++, and Unity.
UI limitation: The IMSDK provides communication features and developer APIs but does not include a full chat UI.
Voice and video: Voice & Video features include 1:1 and group calls, video meetings, screen sharing, meeting controls, and recording.

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Chat APIs#12 of 32

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