The Element app is free.
When it comes to choosing where to host your data (your conversations), and extras such as bridging, there are free and paid options.
Number of separate accounts
Multiple devices per account (Web, Android, iOS, macOS, Windows & Linux)
Cost per month
Matrix is an open network for secure, decentralised communication, connecting 35M+ users over 75K+ deployments.
Governed by The Matrix.org Foundation, the Matrix protocol is an open standard with open source implementations, supporting a vibrant developer ecosystem. Element was founded by the team behind Matrix as a way to bring it to the mainstream.