The best free alternative to Telegram is Signal, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 100 alternatives to Telegram and loads of them is free so hopefully you can find a suitable replacement. Other interesting free alternatives to Telegram are Element (Freemium, Open Source), Tox (Free, Open Source), Wire (Free Personal, Open Source) and Jitsi (Free, Open Source).
TrueConf Server is used by 5000 companies around the world connecting thousands of workplaces and conference rooms. The server is specially designed to work in your corporate network. Deploying TrueConf Server takes only 15 minutes!
Reach is a fast private mass messaging app available for iPhone. ~"Reach saves me a lot of time! I used it to send 90 texts in 90 seconds and each text came out personalized per recipient. That's incredible!" - Executive Director of BOBIC.com WHY USE REACH?
LeggoChat is a group or channel based chat platform that is designed to be easy to set up for any casual, or formal settings and discussions. Users can choose to have their messages logged and stored, or otherwise. No user accounts are required to get started at all.