Best Open Source Tools by Tag in 2026

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Open Source Alternatives

KeyDB

stars 12.5Kforks 675

Faster, multithreaded Redis drop-in with no API changes required

Database Open Core Developer Tools+4

CrowdSec

stars 15.2Kforks 736

Community-powered threat detection and IP blocklist

Security Cybersecurity Monitoring+5

Grafana

stars 77.3Kforks 14.8K

Open source dashboards for metrics, logs, and traces

Monitoring Data Visualization DevOps Tools+4

TiKV

stars 16.9Kforks 2.4K

Distributed key-value store with ACID transactions at scale

Database Cloud Native Developer Tools+3

Falkon

stars 492forks 73

Speed-first browser for KDE Plasma with built-in ad blocking

Web Browsers Privacy Tools Security+1

Sulu

stars 1.4Kforks 369

Enterprise-ready open source CMS built on Symfony

CMS Headless CMS Developer Framework+4

MinIO AIStor

stars 61.4Kforks 7.9K

Hyperscale S3-compatible object storage for AI workloads

Database Cloud Native File Sync & Storage+3

Novu

stars 40.1Kforks 4.5K

Open source notification infrastructure for product teams

API Infrastructure Developer Tools Email+5

Qwen

stars 21.7Kforks 1.9K

Alibaba's Apache 2.0 LLM in sizes from small to frontier scale

LLM AI Agents LLMOps+3

OpenLLaMA

stars 7.5Kforks 406

Permissive open LLaMA reproduction in 3B, 7B, and 13B parameters

LLM AI SDK Developer Framework+3

DuckDB

stars 42.2Kforks 3.9K

Fast in-process SQL analytics database, no server needed

Database Developer Tools Coding+3

Trino

stars 13.3Kforks 3.8K

High-performance distributed SQL query engine for big data

Database Data Visualization Developer Tools+3

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