Open Source Alternatives to OpenRouter

An open-source Python library providing a unified interface for interacting with various LLM providers.

Open source · Self-hostable

AIMLAPI provides a unified API gateway, simplifying the integration of various AI and ML models like GPT-4 and Stable Diffusion into applications.

Open source

Martian provides AI model routing and interpretability tools for superior LLM performance at lower costs.

Open source

Eden AI provides a unified API to access and deploy various AI technologies from leading providers.

Open source

AI gateway and service directory enabling autonomous AI agents to pay for services via x402.

Open source

Hugging Face is the leading AI community and platform for machine learning collaboration, enabling developers to build, share, and deploy models, datasets, and applications.

Open source · Self-hostable

OpenAI is an AI research and deployment company dedicated to ensuring that artificial general intelligence benefits all of humanity.

Open source

The platform for building reliable AI agents and LLM applications.

Open source

AI acceleration cloud platform for open source and enterprise.

Open source · Self-hostable

Generative AI platform for enterprises to build, train, and customize their own AI models.

Open source

Managed vector database for building scalable, reliable, and accurate AI applications and search.

Open source

AI development platform for building and deploying AI applications.

Open source

Cloud AI platform for building and deploying large-scale AI models.

Open source

An open-source feature store for managing and serving data for AI/ML models in production.

Open source · Self-hostable

An infrastructure platform for connecting AI agents with the Model Context Protocol.

Open source

Democratizing access to frontier AI infrastructure.

Open source

AI-powered platform for building and deploying custom AI agents.

Open source

Authentication and authorization for agents. One stack: delegated identity, tool calling, scoped permissions, and audit. Everything your agent needs.

Open source

Neptune provides a data platform for businesses to manage and analyze their data.

Open source

Laghav compresses AI prompts, routes to the cheapest capable model, and tracks spending.

Open source

An open, inference-first AI platform for enterprise developers, offering a full-stack solution for compute, inference, fine-tuning, and RAG on open-source models.

Open source

An open-source framework for building, operating, and benchmarking Multimodal Language Model (MLM) agents across diverse environments.

Open source · Self-hostable

Run open LLMs on a fast GPU fleet via an OpenAI-compatible API for developers.

Open source

Protoevo is an AI company focused on developing advanced AI models and tools for developers and businesses.

Open source

Experimental open-source framework for building self-building autonomous agents with a novel function framework.

Open source · Self-hostable

Unified API platform for accessing and managing over 500 AI models.

Open source

AI-powered API platform for developers to build smarter applications.

Open source

AI-native application development ecosystem with a no-code platform and AI-native BaaS infrastructure.

Open source

Eyrus provides cutting-edge AI infrastructure and solutions for generative AI applications.

Open source

Antesis is an AI company focused on developing cutting-edge AI technology and solutions.

Open source

Open source

SpaceXAI is an artificial intelligence and social media company, a subsidiary of SpaceX, developing the generative AI chatbot Grok and the social network X.

Open source

Chinese AI startup developing advanced large language models and AI agents, including the Kimi chatbot, with a focus on AGI research.

Open source

Arize AI provides an AI observability and LLM evaluation platform for AI engineers to monitor, debug, and improve AI models in production.

Open source

Builds agent-native compute infrastructure.

Open source

Platform for building and deploying custom AI agents connected to company knowledge and tools.

Open source

Generative media platform for developers, offering fast AI model APIs and serverless GPUs.

Open source

Generative media platform for developers, offering serverless GPUs and AI model access via API.

Open source

AI skill layer enabling agents to reliably interact with over 3000 real-world tools and APIs.

Open source

MLOps platform for tracking, visualizing, and collaborating on machine learning experiments.

Open source

AI-powered platform for building and managing customer-facing applications and workflows.

Open source

Persistent memory layer for AI agents and applications.

Open source · Self-hostable

An LLM reliability platform for faster, more confident LLM application development.

Open source

Chinese AI company developing advanced models for Artificial General Intelligence (AGI).

Open source

A managed, private, and production-grade environment for OpenClaw, offering access to over 500 AI models and essential tools.

Open source · Self-hostable

A platform simplifying AI model integration with applications and data sources.

Open source

AI coding assistant that helps developers write, debug, and document code faster.

Open source

AI-powered platform to automate cloud deployments and infrastructure management for developers.

Open source

Open-source autonomous AI agent platform that automates complex digital workflows.

Open source · Self-hostable

Generative AI platform for submitting and combining LLMs using human feedback into a meta-model.

Open source

Run large language models locally on your machine.

Open source · Self-hostable

Ultravox.ai (formerly Fixie.ai) is building human-like voice AI agents and models for natural, real-time communication.

Open source

AI-native vector database for building scalable, intelligent applications.

Open source

Serverless GPU cloud platform for cost-effective AI and machine learning compute.

Open source

An open-source tool to help developers manage code written by AI agents.

Open source · Self-hostable

AI software for running models on a company's own infrastructure.

Open source

AI inference platform for fast, cost-efficient media generation via a unified API.

Open source

Platform to run, fine-tune, and deploy machine learning models with a simple API.

Open source

Cloud platform for deploying and managing MCP servers for AI agents.

Open source

An agentic coding environment with native spec-driven development.

Open source