12 Best Free AI Developer Platforms (2026)

Google AI Studio

No reviews yet Free plan + paid plans

Prototype and build with Google's Gemini models.

• Prompt testing with Gemini models
• Free API keys
• Code generation for the Gemini API
• Image, video and speech models

Best for: Developers trying Gemini, Prototyping AI features, Students learning AI

Hugging Face

No reviews yet Free plan + paid plans

The largest hub for open AI models, datasets and demos.

• Hub of open models and datasets
• Transformers and other libraries
• Spaces for AI demos
• Hosted inference

Best for: AI researchers, Machine learning engineers, Developers using open models

Groq

No reviews yet Free plan + paid plans

Very fast AI inference on custom LPU chips.

• Very fast inference
• Custom LPU chips
• API for popular open models
• Free developer tier

Best for: Real-time AI apps, Voice agents, Developers who need speed

OpenRouter

No reviews yet Free plan + paid plans

One API for hundreds of AI models from many providers.

• One API for hundreds of models
• Automatic provider fallback
• Unified billing
• Model rankings and prices

Best for: Developers comparing models, AI app builders, Teams avoiding vendor lock-in

Ollama

No reviews yet Free and open source

Run open language models on your own computer.

• Run models locally
• One-command setup
• Local API for other apps
• Library of open models

Best for: Developers, Privacy-conscious users, Running AI without the cloud

LM Studio

No reviews yet Free

Desktop app for running local AI models.

• Desktop chat with local models
• Model search and download
• Local API server
• Chat with your documents

Best for: Users wanting private AI, Developers testing models, Hobbyists

LangChain

No reviews yet Free and open source

Frameworks and tools for building LLM apps and agents.

• Open-source LLM framework
• LangGraph for agents
• LangSmith tracing and evaluation
• Many integrations

Best for: Developers building AI apps, Agent builders, Teams monitoring AI quality

Vector database for AI search and retrieval.

• Serverless vector database
• Fast similarity search
• Hosted embedding and reranking
• Assistant for document chat

Best for: Developers building AI search, RAG applications, Recommendation systems

Weights & Biases

No reviews yet Free plan + paid plans

Tools for training, tracking and evaluating AI models.

• Experiment tracking
• Model and dataset versioning
• Weave for LLM app evaluation
• Dashboards and reports

Best for: Machine learning engineers, AI research teams, Teams evaluating LLM apps

Modal

No reviews yet Free plan + paid plans

Serverless cloud for AI and data workloads.

• Serverless GPUs
• Python-first developer experience
• Automatic scaling
• Sandboxes for agents

Best for: AI engineers, Startups deploying models, Data and batch processing

Firecrawl

No reviews yet Free plan + paid plans

Turns websites into clean data for AI apps.

• Website to Markdown
• Crawling and scraping
• Structured data extraction
• Search endpoint

Best for: AI developers, Knowledge base builders, Data pipelines

Open-source platform for building AI apps and agent workflows.

• Visual AI workflow builder
• RAG knowledge bases
• Works with many models
• Self-host or cloud

Best for: Teams building internal AI apps, Developers, Companies wanting self-hosted AI