Ably Chat vs OpenIM

Ably Chat9.0Visit OpenIM8.7Visit

Higher score Ably Chat #4 in Chat APIs 9.0/10 Free plan Free plan✓ 4 of 4 features Visit Ably Chat

vs

OpenIM #7 in Chat APIs 8.7/10 Free plan Free plan✓ 4 of 4 features Visit OpenIM

• Ably Chat fits best

  Budget-conscious apps needing modern chat

• OpenIM fits best

  Self-hosted large-scale group chat

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Side by side

Feature	Ably Chat 9.0/10 Visit ↗	OpenIM 8.7/10 Visit ↗
At a glance
Editor score	9.0	8.7
Ranking	#4 in Chat APIs	#7 in Chat APIs
Best for	Budget-conscious apps needing modern chat	Self-hosted large-scale group chat
Pricing model	Free plan + paid	Free
Starting price	$29/mo	Free
Free plan	✓	✓
Free trial	—	—
Deployment	Cloud, Mobile	Cloud, Mobile, Self-hosted
Platforms	Web, iOS, Android	Web, iOS, Android
Integrations	8 integrations	7 integrations
Features Ably Chat 4/4 · OpenIM 4/4
Presence support	✓	✓
Typing indicators	✓	✓
Push notifications	✓	✓
Moderation tools	✓	✓
Specs
SDK platforms	JavaScript, React, React Native, Kotlin (Android), Kotlin (JVM), Swift	Web, iOS, Android, Flutter, React Native, uni-app, Electron, C/C++, Unity
Delivery methods	WebSocket realtime streaming, REST API, push notifications via channels or direct delivery	Online push, offline push, offline message synchronization, multi-device synchronization
Message history	30 days	Not checked yet
Our review
Pros	Free plan includes 6M monthly messages Presence, reactions, push, and moderation workflows included React UI Kit plus web, iOS, Android, and API support	Supports groups of up to 100,000 members Offers offline messages and multi-device synchronization Includes Server APIs, webhooks, and rich message types
Cons	Standard and Pro plans add usage charges Default message history retention is 30 days Verified SDK coverage is narrower than leading alternatives	Business and Enterprise editions use contact-sales licensing Advanced voice and video features are limited to Enterprise The integration set is focused rather than broad
Our verdict	Ably Chat is a developer-focused SDK and API for adding realtime messaging to applications. It supports 1:1 conversations, group chat rooms, livestream chat, presence, typing indicators, reactions, message editing and deletion, persistent… Read the review →	OpenIM is open-source communication infrastructure for developers adding in-app chat and messaging to web, mobile, desktop, and cross-platform applications. Its self-hosted server components, client SDKs, Server APIs, and webhooks cover… Read the review →

Strengths and trade-offs

• Ably Chat — where it wins

  • Free plan includes 6M monthly messages
  • Presence, reactions, push, and moderation workflows included
  • React UI Kit plus web, iOS, Android, and API support

  Where it doesn't

  • Standard and Pro plans add usage charges
  • Default message history retention is 30 days
  • Verified SDK coverage is narrower than leading alternatives

• OpenIM — where it wins

  • Supports groups of up to 100,000 members
  • Offers offline messages and multi-device synchronization
  • Includes Server APIs, webhooks, and rich message types

  Where it doesn't

  • Business and Enterprise editions use contact-sales licensing
  • Advanced voice and video features are limited to Enterprise
  • The integration set is focused rather than broad

• Ably Chat9.0/10 · Free plan

  A cost-conscious chat API with strong realtime features and a focused SDK footprint.

  Visit Ably ChatFull verdict →
• OpenIM8.7/10 · Free plan

  A self-hosted chat stack for large groups, synchronized messaging, and developer control.

  Visit OpenIMFull verdict →