Mattermost

Slack alternative - "The secure collaboration hub for technical teams"

Active

Open source: Yes

Visit

Org. type: For-profit business / social enterprise / B Corp
Project type: Tool or platform
Language(s): English
Tech stack: BuiltWith report →
Categories: General purpose open source tools, Internal communication and coordination, Open source
Tags: Slack
Added: 2024-01-22
Last modified: 2026-09-28T18:03:00.000Z

Additional details

Platforms: Signal, Slack
Number of integrations: 0
Activity status: Active

More in General purpose open source tools

https://www.navapbc.com/opensource/public-tech-pledge

Public Tech Pledge

The Public Tech Pledge is an open-source advocacy pledge from Nava PBC that asks government technology partners to guarantee agencies five rights over publicly funded technology.

2026

Adjacent Fields, Building inside government, Build something, Digital transformation, Foundational layers, General purpose open source tools, Govtech, Learn to build, Open source, Policy, Procurement, Tech or Digital Policy, The People, The Tech

https://www.softwareheritage.org/

Software Heritage

Software Heritage preserves software source code for present and future generations.

Paris

Adjacent Fields, Archives, Civic data, Foundational layers, General purpose open source tools, Open knowledge, Open science, Open source, Open source supply chain, The Tech

https://lasuite.numerique.gouv.fr

La Suite numérique

L'espace de travail ouvert et souverain des agents de l'État

Bonne-Nouvelle, Paris, France

Building inside government, Digital sovereignty, General purpose open source tools, Group communication tools, Internal government tech capacity

https://codeforkanazawa.org/

Code for Kanazawa

Code for Kanazawa (CfK) is a civic tech community organization in Kanazawa, Japan, that collects residents' local problems and builds simple software and hardware to solve them.

Kanazawa City, Japan (Nihon or Nippon) 🇯🇵

Adjacent Fields, Build something, Build your own, Civic data, Civic hackathons, Civic hacking meetups, Foundational layers, General purpose open source tools, In-person meetings, Meet the others, Open civic data, Open source, The People, The Tech

https://kamimap.com/

Kami Map

Kami Map ("Paper Map") is an open-source Code for Japan tool that turns online disaster-relief map data, water, food, aid stations, open shops, hazards, into a clean printable paper map, so people can access critical information when power, phones or connectivity fail.

Japan

Adjacent Fields, Civic data, Civic maps, Disaster response and humanitarian tech, Foundational layers, General purpose open source tools, Mapping, Open source, Tech for public challenges, The Tech