Best Open Core Open Source Tools in 2026

Open Source Alternatives

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Open Source Alternatives

Pinta

stars 3.9Kforks 385

Free open source image editor inspired by Paint.NET

Graphic Design Photo Management Open Core+3

OLMo

stars 1.5Kforks 300

Allen AI research LLM with public weights and open training code

LLM LLMOps AI SDK+4

JanusGraph

stars 5.8Kforks 1.2K

Distributed open source graph database for massive scale

Database Developer Tools Cloud Native+3

TiDB

stars 40.4Kforks 6.2K

MySQL-compatible distributed SQL database for elastic scale

Database Cloud Native DevOps Tools+4

Nhost

stars 9.3Kforks 608

Firebase alternative: GraphQL, Postgres auth, and file storage

BaaS Authentication Authorization+5

Appsmith

stars 40.6Kforks 4.7K

Build internal tools with a low-code drag-and-drop UI

Low-code Workflow Automation Developer Tools+5

KeePass

stars 48forks 5

Free open source password manager with encrypted local file

Security Authentication Authorization+4

Krita

stars 10.2Kforks 828

Free open source digital painting app for artists

Graphic Design UI/UX Design Open Core

Prose

stars 58forks 6

Decentralized open source workplace with chat and docs

Chat Self Hosted Security+3

KeePassXC

stars 28.3Kforks 1.9K

Cross-platform open source password manager with browser plugin

Security Privacy Tools Authentication+5

TinyLLaMA

stars 9Kforks 628

Compact 1.1B LLaMA model trained on 3 trillion tokens

LLM AI SDK Developer Tools+4

Passbolt

stars 6.1Kforks 394

Open source team password manager with sharing and audit

Security Cybersecurity Authentication+5