Mattermost is an open-source team messaging platform designed for secure communication and collaboration. It was created as an open-source alternative to Slack, with a focus on self-hosted deployment for organizations that need data control.
2015 – Mattermost Founded
Mattermost was founded by Ian Tien and Corey Hulen as an open-source alternative to Slack.
2016 – Mattermost 2.0
Major release with improved performance and enterprise features.
2017 – Mattermost 3.0 with Video Calls
Integrated video calling and screen sharing capabilities were added.
2018 – Mattermost 4.0
Complete UI redesign and performance improvements.
2019 – Mattermost 5.0
Enhanced enterprise features including LDAP/AD integration and advanced permissions.
2020 – Mattermost 6.0
Improved mobile apps and enhanced security features.
2022 – Mattermost 7.0
Major release with boards (kanban), playbooks (incident response), and enhanced integrations.
2025 – Mattermost 11.0
Major version with MySQL deprecated in favor of PostgreSQL.
2026 – Mattermost 11.4.1
Current version (February 2026) with enhanced collaboration features and improved performance.
| Era | Key Technology |
|---|---|
| 2015-2017 | Go backend, React frontend |
| 2018-2020 | Performance optimization, mobile apps |
| 2021-2023 | Boards, Playbooks, enhanced integrations |
| 2024-2026 | PostgreSQL focus, enterprise features |