Mattermost alternative

Why go with Rocket.Chat vs Slack?


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They’ve also built a great product and share the same open source philosophy as us. If you’re here to evaluate Rocket.Chat vs Mattermost, you’re already on the right track to find a platform that will help enable real-time conversations across your business while keeping your data fully protected.

So what’s the [.c-red]difference between Rocket.Chat and Mattermost?[.c-red] How do I pick?

We’ll compare features, capabilities and all of that (important) stuff further down this page, but the biggest difference is our DNA.

The founding team at Mattermost built a platform specifically focused on helping developers by making DevOps real-time while the team at Rocket.Chat is focused on building software to enable every conversation to happen in real-time; between colleagues, with other companies, with your customers and also with the apps you love.

Here are 4 reasons why companies pick Rocket.Chat over Mattermost

Rocket.Chat community version includes basic LDAP directory sync

Every LDAP feature, such as basic directory sync, SAML, Oauth or advanced LDAP functionalities are paid with Mattermost. The community version doesn’t include any of it. With Rocket.Chat, basic directory sync is included in the community license. If that’s all you need, you’re free to use it as you please and if you need more advanced LDAP functionalities you can test and see your users flowing in before making a commercial commitment. That’s faster time to value.

Rocket.Chat offers a truly permissive open source license

Rocket.Chat’s community edition is licensed under the most well-understood and permissive open source license – the MIT source license. Mattermost offers a more restrictive MIT-COMPILED-LICENSE which pushes anyone depending on enhancing or modifying their source code into agreements such as AGPL V3.

AGPL V3, one of the more restrictive open source licenses known, enforces all modified code to be made open source. Any enhancements made by large enterprise customers, for example, can be forced to be made open source and shown to everyone – including your competitors.

Rocket.Chat is backed by a larger developer community

Not an opinion, just the numbers. Rocket.Chat has over 30,000 stars on Github while Mattermost just over 20,000. That means Rocket.Chat has about 10,000 more developers helping improve the source code every day.



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Still not convinced? No problem.

Here’s an in-depth feature comparison of Rocket.Chat vs Mattermost.



Open Source

MIT License




Talk with



Partners and vendors

Other companies

Team collaboration features

Teams and channels


Voice, video, and screen sharing

File, image, and link sharing


Native video integration

Unlimited search history


Robust notification centers

Engagement dashboard

Read receipts

Advanced roles and permissions

Guest access

Encrypted push notification

Real-time translation

Open channels

White lableing

Omnichannel features

Manual & Auto Chat Routing

Queue Management

Agent office hours configuration

Facebook,  Whatsapp, Twitter Integrations

SMS & CRM Integration

Email Inbox

Analytics and Real-time monitoring dashboards

Chat tagging and forwarding


Active Directory/LDAP


App Marketplace


Privacy and Security

Post incident reports

ISO 27001 (external audit)

OAuth with Google

Single Sign-On with ADFS, Okta, One Login via SAML 2.0

End to end encryption

Access control policies

Off the record

Multi-factor authentication

Incident collaboration

ID-only push notifications


Native apps for iOS, Android, Windows, Mac and Linux


On GitHub

Here’s what customers who picked Rocket.Chat have to say.

“Slack wasn’t a real alternative for us at that time, because it was SaaS. ”

“For data privacy concerns, we needed something that we could host ourselves. Rocket.Chat really speeds up the process of collaborating with our external partners, as well as internally. It allows us to share information really fast, very effectively, and in different ways.”
Stefan Teubner
IT Project Leader, Audi Business Innovation GmbH

“A huge differentiator to win more business…”

“Thanks to Rocket.Chat, we figured out how to win customers without sending engineers on site. The omnichannel feature enables us to provide enterprise-level support…”
Mike Schwartz
CEO & Founder at Gluu

Trusted by 12M+ users
in over 150 countries