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Handpicked Open Source Alternatives to Paid Softwares

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422 projects, sorted by GitHub stars.

GPT‑NeoX

Alternative toDatabricks (with MosaicML)

EleutherAI's framework for training LLMs at research scale

  • 7,473 GitHub stars
  • Apache-2.0Licence Apache-2.0
  • #LLM

magnitude

Alternative toLM Studio

Local models for your agent, tuned for your hardware

  • 7,220 GitHub stars
  • Apache-2.0Licence Apache-2.0
  • #AI Agents

openpanel

Alternative toMixpanel

Open-source analytics with funnels, replay, and self-hosting

  • 7,184 GitHub stars
  • AGPL-3.0Licence AGPL-3.0

Pixelfed

Alternative toFlickr

Fediverse photo sharing: no central platform, fully user-owned

  • 7,125 GitHub stars
  • AGPL-3.0Licence AGPL-3.0

Apache CouchDB

Alternative toCouchbase Capella

NoSQL database with multi-primary sync and HTTP API

  • 6,981 GitHub stars
  • Apache-2.0Licence Apache-2.0
  • #Database

OpenBot

Alternative toGrok Bot

AI coworkers you can trust with real work

  • 6,875 GitHub stars
  • MITLicence MIT
  • #AI Agents

Standard Notes

Alternative toEvernote

End-to-end encrypted notes with 100+ extensions and themes

  • 6,672 GitHub stars
  • AGPL-3.0Licence AGPL-3.0

Flagsmith

Alternative toLaunchDarkly

Open source feature flags and remote config, self-hosted

  • 6,605 GitHub stars
  • BSD-3-ClauseLicence BSD-3-Clause

trueforge

Alternative toCClaude Managed Agents

Open-source agent harness for reliable, long-running LLM agents

  • 6,315 GitHub stars
  • MITLicence MIT
  • #LLM

Helicone

Alternative toArize AI

Monitor LLM spend and catch prompt anomalies in production

  • 6,228 GitHub stars
  • Apache-2.0Licence Apache-2.0
  • #LLMOps

Lightdash

Alternative toLooker

Self-serve BI for dbt projects with metric definitions

  • 6,195 GitHub stars
  • MITLicence MIT

OpenCloud

Alternative toBox

File sync for organizations with data sovereignty and S3 storage

  • 6,194 GitHub stars
  • Apache-2.0Licence Apache-2.0
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