Top 6 Open-Source Alternatives to blockslack.io

The top open-source alternatives to blockslack.io are Signal, HawkPost, and Wire. One of the criteria for ordering this list is the number of mentions that products have on reliable external sources. You can suggest additional sources through the form here.

Signal Landing Page
1

Signal

Fast, simple & secure messaging. Privacy that fits in your pocket.
Pricing:
- Open Source
#Communication #Group Chat & Notifications #Messaging 180 social mentions
HawkPost Landing Page
2

HawkPost

Submit your content securely
Pricing:
- Open Source
#Authentication #Tech #Web App
Wire Landing Page
3

Wire

Private & Secure Messenger
Pricing:
- Open Source
#Communication #Group Chat & Notifications #Messaging 14 social mentions
Twilio Landing Page
4

Twilio

Brings voice and messaging to your web and mobile applications.
Pricing:
- Open Source
#Communication #Cloud Communications #Customer Engagement
Mumble Landing Page
5

Mumble

Mumble is an open source, low-latency, high quality voice chat software primarily intended for use...
Pricing:
- Open Source
#Communication #Group Chat & Notifications #Chat 2 social mentions
Cyph Landing Page
6

Cyph

Cyph is the name of a completely free chatting website that provides its visitors with a secure and safe chatting environment.
Pricing:
- Open Source
#Group Chat & Notifications #Communication #Social & Communications