Free Chat SDK for Startups (6 Months Free)

[raghu99595]

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[richardonline]

There are lot of opensource Chat SDK providers in Market.could you try for your requirements

1. Rocket.chat
2. Chatsdk.co

20 to 30 Days trial version providers list
1. CONTUS MirrorFly
2. Getstream
3.Sendbird

Still you want more information providers you can check this source link it will help you
https://blog.contus.com/best-chat-sdk/