Best Developer Tools Open Source Tools in 2026

Airbyte

Data & Analytics AI & Machine Learning Web & App Development+1

Open source ELT platform with 300+ data connectors

stars 21.1Klicense NOASSERTIONlang Python

Developer Tools API Infrastructure Database+14

Metarank

AI & Machine Learning Data & Analytics Web & App Development

Open source personalization and search ranking engine

stars 2.4Klicense Apache-2.0lang Scala

Search Engine LLM A/B Testing+10

PostgreSQL

Data & Analytics Web & App Development IT Management

World's most advanced open source relational database

stars 20.7Klicense NOASSERTIONlang C

Database Open Core Self Hosted+3

Sylius

Web & App Development IT Management Product & Project Management

Headless Symfony commerce for complex B2B and B2C stores

stars 8.5Klicense MITlang PHP

Developer Tools Developer Framework API Development Tools+11

Totum

Web & App Development Business & Productivity IT Management+2

Self-hosted low-code platform for internal business tools

stars 983license MITlang PHP

Database No Code Self Hosted+11

BigchainDB

Data & Analytics Web & App Development Finance & Fintech+1

Blockchain database with high throughput and low latency

stars 4Klicense Apache-2.0lang Python

Database Web3 Authentication+5

Taiga

Product & Project Management Web & App Development

Agile project management for Scrum, Kanban, and hybrid teams

stars 370license AGPL-3.0lang CoffeeScript

Developer Tools Project Management Workflow Automation+3

Stirling PDF

Business & Productivity Security & Monitoring Web & App Development+1

Self-hosted PDF editor with 50+ tools for every PDF task

stars 77.9Klicense NOASSERTIONlang TypeScript

Self Hosted Developer Tools Workflow Automation+4

Saleor

Web & App Development Product & Project Management AI & Machine Learning

Open source headless e-commerce platform with GraphQL API

stars 22.9Klicense BSD-3-Clauselang Python

Headless CMS API Development Tools Developer Framework+13

Pulumi

Web & App Development IT Management AI & Machine Learning+1

Write infrastructure as code in TypeScript, Python, or Go

stars 25.1Klicense Apache-2.0lang Go

Developer Tools DevOps Tools CI/CD Platforms+14

Apache CouchDB

Web & App Development Data & Analytics IT Management

NoSQL database with multi-primary sync and HTTP API

stars 6.9Klicense Apache-2.0lang Erlang

Database No Code API Development Tools+3

DocuSeal

Web & App Development Business & Productivity Finance & Fintech

Open source document signing and fillable PDF forms

stars 11.8Klicense AGPL-3.0lang Ruby

Developer Tools API Development Tools Workflow Automation+12

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Airbyte

Metarank

PostgreSQL

Sylius

Totum

BigchainDB

Taiga

Stirling PDF

Saleor

Pulumi

Apache CouchDB

DocuSeal

Airbyte

Metarank

PostgreSQL

Sylius

Totum

BigchainDB