1
Formbricks
Open-source survey and experience management.
Open Source · official site formbricks.com (not linked) · Alternatives
Mattermost alternatives: 10 similar tools
Looking for something like Mattermost? Here are 10 curated products that cover similar ground.
Top Mattermost alternatives
2
Immich
Self-hosted photo and video backup.
Open Source · official site immich.app (not linked) · Alternatives
3
Jellyfin
Free media server for your own collection.
Open Source · official site jellyfin.org (not linked) · Alternatives
4
Nextcloud
Self-hosted file sync and collaboration suite.
Open Source · official site nextcloud.com (not linked) · Alternatives
5
Rocket.Chat
Open-source communication platform.
Open Source · official site rocket.chat (not linked) · Alternatives
6
7
AFFiNE
Open-source docs, whiteboards, and databases.
Open Source · official site affine.pro (not linked) · Alternatives
8
AppFlowy
Open-source workspace for notes, wikis, and projects.
Open Source · official site appflowy.com (not linked) · Alternatives
9
Appwrite
Open-source backend for web and mobile apps.
Open Source · official site appwrite.io (not linked) · Alternatives
10
BookStack
Simple self-hosted wiki platform.
Open Source · official site bookstackapp.com (not linked) · Alternatives
Questions
What are the best alternatives to Mattermost?
Popular Mattermost alternatives on LaunchNest include Formbricks, Immich, Jellyfin. All are real Open Source products checked by editors.
What does Mattermost do?
Secure, self-hostable team messaging.
How are alternatives chosen?
LaunchNest compares topics and categories across the directory and lists the closest matches first.
See every pick in Best Open Source tools. Logos and trademarks belong to their owners.