Open Source Alternatives to OpenAI
19 open source Frontier AI Lab options similar to OpenAI, ranked by named competitors first, sector overlap, and our 0-100 AI-readiness score. Every company listed publishes its source: each one carries an open source sector tag and a public GitHub repository.
K-Scale Labs40Frontier AI LabSan Francisco, United StatesBuilding general-purpose AI for a future of material abundance.
Open source · Self-hostable
CRAB27Agentic AIAn open-source framework for building, operating, and benchmarking Multimodal Language Model (MLM) agents across diverse environments.
Open source · Self-hostable
Langchain-Chatchat10Open SourceOpen-source, offline-deployable RAG and Agent application built on LangChain for local knowledge base Q&A.
Open source · Self-hostable
Causari10Agentic AICausari provides structured causal knowledge to AI agents for tracing cause and effect, finding historical patterns, and searching for impactful events.
Open source · Self-hostable
Kyutai68Frontier AI LabParis, France$300.0MA non-profit AI research lab focused on open science and developing advanced multimodal and voice AI models.
Open source · Self-hostable
Parlant26AI AgentsTel Aviv, IsraelParlant is an open-source conversational AI engine dedicated to solving the Human/AI alignment problem by enabling Large Language Models to reliably perform as desired and prevent hallucinations.
Open source · Self-hostable
- Litegen10AI Infrastructure
An open-source, OpenAI-compatible proxy for AI image and video generation, routing across multiple providers with load balancing and cost tracking.
Open source
Open Intelligence Foundation7Frontier AI LabA non-profit research organization focused on advancing open and ethical AI development.
Open source
- Firmgate7Enterprise Software
Australian-owned, sovereign-built, open-source self-hosted intranet with AI-enabled enterprise modules.
Open source
Comfy Org53AI Image Generation$30.0MComfy is an AI creation engine for visual professionals, offering granular control over AI models, parameters, and outputs through a node-based workflow on an infinite canvas.
Open source
Vocode50Open SourceSan Francisco, United States$3.8MOpen-source library for building hyper-realistic voice agents and conversational AI applications.
Open source · Self-hostable
Rasa49Conversational AIBerlin, Germany$13.0MOpen-source conversational AI platform for building custom chatbots and virtual assistants.
Open source · Self-hostable
BenchFlow42Frontier AI LabSan Francisco, United States$1.0MBenchFlow is a frontier environment lab that builds environments for AI agents to learn and be evaluated on real computer work.
Open source
GPT4All26Foundation ModelNew York, United StatesOpen-source, privacy-focused AI assistant that runs locally on your hardware.
Open source · Self-hostable
- AGAgent4Rec20Agentic AI
Simulates 1,000 LLM-powered agents for diverse movie recommendation preferences.
Open source
0sec11CybersecurityAn applied cybersecurity research lab using AI agents to autonomously discover, exploit, and verify software vulnerabilities.
Open source · Self-hostable
DocsGPT8Open SourceOpen-source AI platform for securely deploying intelligent agents, private enterprise search, and complex document workflows on an organization's own data.
Open source · Self-hostable
- Manhattan Reasoning7AI Chip
Cloud silicon, open-source toolchains, and training environments where AI learns to design computer chips that are both correct and optimal.
Open source
CIQ59Artificial IntelligenceReno, United States$26.0MSponsors of OpenWALDO, a community-driven initiative for open-source AI training data, and provider of enterprise Linux, HPC, and AI infrastructure software.
Open source

