Best Open Core Open Source Tools in 2026

Zulip

Communication & Collaboration Business & Productivity

Organized team chat with threaded conversations, self-hostable

stars 25.1Klicense Apache-2.0lang Python

Chat Open Core Self Hosted+2

Scoold

Communication & Collaboration Business & Productivity IT Management+2

Self-hosted Q&A platform for internal team knowledge

stars 916license Apache-2.0lang Java

Knowledge Management Knowledge Base Customer Support+11

Tox

Communication & Collaboration Security & Monitoring

Free encrypted P2P messaging and voice calls, no servers

stars 2.6Klicense GPL-3.0lang C

Chat Security File Sharing+2

Jami

Communication & Collaboration Security & Monitoring

Free P2P encrypted messaging, calls, and file sharing

stars 165license GPL-3.0lang C++

Chat File Sharing Security+7

Tinode

Communication & Collaboration Web & App Development IT Management

Self-hosted instant messaging platform for web and mobile apps

stars 13.3Klicense GPL-3.0lang Go

Chat WebSocket Servers Self Hosted+7

Jitsi

Free video conferencing you can self-host with no account needed

stars 29.1Klicense Apache-2.0lang TypeScript

Video Self Hosted Open Core+3

GPT‑NeoX

AI & Machine Learning Web & App Development

EleutherAI's framework for training LLMs at research scale

stars 7.4Klicense Apache-2.0lang Python

AI Agents API Infrastructure LLMOps+3

Chatwoot

Customer Support AI & Machine Learning Communication & Collaboration

Self-hosted customer support platform with live chat and AI

stars 28.9Klicense NOASSERTIONlang Ruby

Customer Support Chatbots Knowledge Base+10

Mumble

Communication & Collaboration IT Management

Free open source low-latency voice chat for gaming teams

stars 8Klicense NOASSERTIONlang C++

Self Hosted Open Core Security+4

LiveKit

AI & Machine Learning Web & App Development Communication & Collaboration+1

Real-time voice and video infrastructure on open source WebRTC

stars 10.2Klicense Apache-2.0lang Python

AI Agents LLM API Infrastructure+13

Weaviate

AI & Machine Learning Data & Analytics Web & App Development

AI-native vector database for semantic search and AI apps

stars 16.1Klicense BSD-3-Clauselang Go

Database AI Agents LLM+5

SigNoz

Security & Monitoring Product & Project Management Data & Analytics+2

Open source APM with logs, traces, metrics, and dashboards

stars 26.7Klicense NOASSERTIONlang TypeScript

Monitoring Self Hosted Open Core+19

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Zulip

Scoold

Tox

Jami

Tinode

Jitsi

GPT‑NeoX

Chatwoot

Mumble

LiveKit

Weaviate

SigNoz

Zulip

Scoold

Tox

Jami

Tinode

Jitsi