Let's Chat
Like Slack, but opensource and self-hosted.
Let's Chat launched on February 13, 2015 with 323 votes, #30 of 1,772 launches that month and more than 95% of that year's launches. The site was still online in September 2026, 11 years on.
In plain words
Let's Chat is a self-hosted messaging application built on Node.js and MongoDB, designed for small teams seeking an open-source alternative to commercial chat services. It offers persistent messaging with features including LDAP/Kerberos authentication, a REST-like API, and XMPP support. The MIT-licensed software is straightforward to deploy and configure, making it suitable for organizations preferring to run chat infrastructure on their own servers rather than relying on third-party services.
written from the facts on this page · September 2026
From the sources
Self-hosted chat for small teams.
Way back in 2012, we didn't like any of the existing chat services out there. So we decided to write our own. Let ' s Chat is a persistent messaging application that runs on Node.js and MongoDB. It's designed to be easily deployable and fits well with small, intimate teams. It's free (MIT licensed) and ships with killer features such as LDAP/Kerberos authentication, a REST-like API and XMPP support. Let's Chat is a side-project of the development team at Security Compass . (A real life 10% time project!) Optional — For custom settings, copy and edit settings.yml.sample: Heads up — For more detailed instructions, please check out the wikifrom sdelements.github.io
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