Synapse

Synapse is an open‑source implementation of the Matrix homeserver protocol, enabling persistent, decentralized real‑time communication. It is written in Python and maintained by Element, and can be run and managed directly from the source code under an Apache‑2.0 license. The server supports standard Matrix features such as federation, single sign‑on, and a programmable Admin API, and it can be extended with pluggable modules and worker processes for scaling.

The software is aimed at individuals, communities, and organizations that wish to host their own Matrix service without relying on third‑party providers. It is self‑hostable, free to use, and does not require a subscription, making it suitable for small‑ to mid‑scale deployments as well as larger, professional environments when combined with Element’s Server Suite offerings. Documentation covers installation, configuration, monitoring, and upgrading, and a community support room is available for troubleshooting.

Developers can contribute to Synapse via its public repository, with guidance on setting up a development environment, testing, and submitting changes. The project also provides detailed information on its database schema, internal architecture, and federation mechanisms, facilitating both administration and further development.