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Chat21

Free plan AndroidiPhoneWeb

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Where Chat21 stands on Freedom251

Chat Api#16 of 26

Look at these too

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Every alternative →
Compare Chat21 with TalkJS

Free plan: Yes
Open source: Not published
Runs on: Android, iPhone, Web
Website: chat21.org
Research read: 24 Sept 2026
Best place: #16 of 26 on chat api

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