Open source
Open in name
Stats

Search Openroster

Search companies, categories and pages

Every company with “Open” in its name, and every company that builds in the open.

Browse

All companies Open source Open in name Alternatives Licenses AI & ML Databases & Data Developer Tools Infrastructure & Cloud

Project

About & stats Submit a company Account Contact

Legal

Takedowns & corrections Suggest a correction

Names and logos belong to their owners. Listing is not endorsement. · hello@openroster.dev

Browse
Communication

Communication

25 companies · 19 open source · 9 open in name · 6 licenses

Type

Categories

All categories AI & ML102 Developer Tools67 Infrastructure & Cloud54 Databases & Data96 Security51 Observability20 Analytics26 Productivity42 Design & Media31 Communication25 Commerce13 Fintech22 Web321 Health15 Education41 Hardware & IoT27 Real Estate4 Consumer10 Government & Nonprofit26 Other6

/

25 companies

Companies

B
Bluesky
No. 0045
Decentralized social network built on the AT Protocol
CommunicationMITest. 2021
Open source
C
Chatwoot
No. 0058
Open-source customer engagement and support platform
CommunicationMITest. 2021
Open source
D
Discourse
No. 0102
Open-source discussion and community platform
CommunicationGPL-2.0est. 2013
Open source
D
Dittofeed
No. 0103
Open-source customer engagement and messaging automation
CommunicationMITest. 2022
Open source
E
Element
No. 0119
Secure, decentralised communication built on Matrix
CommunicationAGPL-3.0est. 2017
Open source
K
Kandra Labs
No. 0183
Company behind Zulip, organized threaded team chat
CommunicationApache-2.0est. 2012
Open source
L
LiveKit
No. 0208
Open-source realtime voice, video and AI agent infrastructure
CommunicationApache-2.0est. 2021
Open source
M
Mattermost
No. 0221
Secure collaboration platform for technical and mission-critical teams
CommunicationAGPL-3.0est. 2016
Open source
N
NodeBB
No. 0251
Node.js-based community forum software
CommunicationGPL-3.0est. 2013
Open source
N
Novu
No. 0254
Open-source notification infrastructure
CommunicationMITest. 2021
Open source
F
Open Fiber
No. 0293
Italian wholesale fibre broadband network
Communicationest. 2015
-
Open-Xchange
No. 0345
Email and collaboration software; owner of Dovecot and PowerDNS
Communication
Open sourceOpen in name
P
OpenPhone
No. 0446
Business phone system for teams; rebranded as Quo
Communicationest. 2018
R
Openreach
No. 0452
UK wholesale broadband and phone network
Communicationest. 2006
S
Openserve
No. 0472
Telkom's wholesale fibre network in South Africa
Communicationest. 2015
S
OpenSIPS
No. 0477
Open-source SIP server for VoIP
Communicationest. 2008
Open sourceOpen in name
T
OpenTalk
No. 0496
GDPR-compliant open-source video conferencing
Communicationest. 2021
Open sourceOpen in name
V
OpenVidu
No. 0507
Self-hosted video conferencing and WebRTC platform
Communication
Open sourceOpen in name
W
OpenWeb
No. 0514
Commenting and community engagement platform for publishers
Communicationest. 2012
P
Postiz
No. 0551
Open-source social media scheduling tool
CommunicationAGPL-3.0est. 2024
Open source
R
Rocket.Chat
No. 0586
Secure communications platform for team chat and omnichannel
CommunicationMITest. 2015
Open source
S
Stalwart Labs
No. 0610
All-in-one mail and collaboration server written in Rust
CommunicationAGPL-3.0est. 2019
Open source
T
Typebot
No. 0661
Conversational form and chatbot builder (fair source)
CommunicationFSL-1.1
Source available
W
Wire
No. 0687
End-to-end encrypted collaboration platform
CommunicationGPL-3.0est. 2012
Open source

Showing 24 of 25