Best open-source communication tools

Open-source team chat, messaging and collaboration software.

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Personal32Enterprise25

Purpose

AI & LLM tooling329Chat UIs22Agents & frameworks103Local inference24RAG & vector DBs48Coding assistants71Evals & observability13Agent skills43MCP servers25Developer tools391Web frameworks122Databases & backends50Editors & IDEs21API tools21Self-hosted apps123Notes & docs44Automation60Data & analytics57Infra & DevOps82Security & identity67Communication38Media & photos93Design & creative86

Runs on

Web8Docker / self-host17Desktop9Mobile8CLI1Library / SDK8Extension / plugin1

License

Permissive17Copyleft14Source-available0Other / custom7

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Has live demo1Commit in last 90 days38

38 projects · showing 21–38

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M

MailspringFoundry376/Mailspring

Fast, open-source mail clientPersonalCommunicationDesktop★ 18kGPL-3.0commit yesterday

79worth

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L

LemmyLemmyNet/lemmy

Decentralized link aggregatorPersonalSelf-hosted appsCommunicationDocker / self-host★ 15kAGPL-3.0commit 3 days ago

79worth

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N

Novunovuhq/novu

Notification infrastructureEnterpriseAPI toolsCommunicationDocker / self-host★ 40kcommit yesterday

78worth

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C

Chatwootchatwoot/chatwoot

Open-source customer support deskEnterpriseCommunicationDocker / self-host★ 37kcommit 2 days ago

78worth

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b

bitchatpermissionlesstech/bitchat

Bluetooth mesh chatPersonalCommunicationMobile★ 36kUnlicensecommit last week

78worth

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M

MeetilyZackriya-Solutions/meetily

Private AI meeting assistantPersonalAI & LLM toolingCommunicationDesktop★ 31kMITcommit 3 weeks ago

76worth

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M

Mail-in-a-Boxmail-in-a-box/mailinabox

Easy self-hosted mail serverPersonalSelf-hosted appsCommunicationCLI★ 15kCC0-1.0commit last week

76worth

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D

Dograhdograh-hq/dograh

Self-hosted voice AI platformPersonalEnterpriseAgents & frameworksCommunicationDocker / self-host★ 5.8kBSD-2-Clausecommit yesterday

76worth

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P

PHPMailerPHPMailer/PHPMailer

Email sending library for PHPPersonalEnterpriseCommunicationLibrary / SDK★ 22kLGPL-2.1commit 2 weeks ago

75worth

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M

MJMLmjmlio/mjml

Framework for responsive emailPersonalEnterpriseCommunicationDesign & creativeLibrary / SDK★ 18kMITcommit 3 weeks ago

75worth

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E

EMQXemqx/emqx

Scalable MQTT brokerEnterpriseInfra & DevOpsCommunicationDocker / self-host★ 17kcommit yesterday

74worth

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N

Nodemailernodemailer/nodemailer

Send email from Node.jsPersonalEnterpriseCommunicationLibrary / SDK★ 18kcommit yesterday

73worth

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H

Hubothubotio/hubot

Customizable chat botPersonalEnterpriseAutomationCommunicationLibrary / SDK★ 17kMITcommit last week

73worth

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O

OpenIMopenimsdk/open-im-server

Open-source instant messaging serverEnterpriseCommunicationDocker / self-host★ 17kApache-2.0commit last month

72worth

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D

Discoursediscourse/discourse

Platform for community discussionPersonalEnterpriseSelf-hosted appsCommunicationWebDocker / self-host★ 48kGPL-2.0commit 2 days ago

71worth

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T

TEN FrameworkTEN-framework/ten-framework

Framework for conversational voice agentsPersonalEnterpriseAgents & frameworksCommunicationLibrary / SDK★ 11kcommit 4 days ago

69worth

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d

daily.devdailydotdev/daily

Personalized developer news feedPersonalDeveloper toolsCommunicationWebExtension / plugin★ 20kAGPL-3.0commit 3 weeks ago

64worth

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R

RTranslatorniedev/RTranslator

Real-time translation app for AndroidPersonalAI & LLM toolingCommunicationMobile★ 10kApache-2.0commit last month

61worth

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Runs on

Web · 8Docker / self-host · 17Desktop · 9Mobile · 8CLI · 1Library / SDK · 8Extension / plugin · 1

For

Personal · 32Enterprise · 25