Raunak Patil

Best AI tools for building with AI in October 2026

Models, APIs, frameworks and local runners for people building their own AI apps and agents. Below are the 76 that Raunak picked, in Radar's order, then the most popular of the other 688 in this category on Radar.

  1. 1Hugging FaceHome of open AI: millions of models and datasets, and Spaces to demo them.Free plan
  2. 2OllamaRun open models on your own machine with one command.Open source
  3. 3Workers AIOpen models served from Cloudflare's network, with a free daily allowance.Free plan
  4. 4LangChainFrameworks for LLM apps and agents, LangGraph for the stateful ones.Open source
  5. 5LM StudioA desktop app to find, download and chat with local models.Free
  6. 6Open WebUIA self-hosted ChatGPT-style interface for local and API models.Open source
  7. 7JanAn open-source assistant that runs fully offline on your computer.Open source
  8. 8OpenRouterOne API, one bill, hundreds of models from every provider.Free plan
  9. 9Google AI StudioTry Gemini models for free and build apps on them in the browser.Free plan
  10. 10OpenAI APIGPT models for your own apps: text, vision, voice, images and agents.Paid
  11. 11Claude APIAnthropic's models for your own products and agents.Paid
  12. 12GroqExtremely fast inference for open models, on its own chips.Free plan
  13. 13ReplicateRun thousands of open models with an API call; pay by the second.Paid
  14. 14falFast APIs for the latest image, video and audio models.Paid
  15. 15LlamaIndexConnects LLMs to your documents and data: parsing, indexing, RAG and agents.Open source
  16. 16AI SDKVercel's TypeScript toolkit for streaming chat, tools and agents in web apps.Open source
  17. 17Transformers.jsRuns Hugging Face models right in the browser, on the GPU with WebGPU.Open source
  18. 18Model Context ProtocolThe open standard for plugging tools and data into any AI assistant.Open source
  19. 19vLLMHigh-throughput serving for open models, on your own GPUs.Open source
  20. 20UnslothFine-tune open models faster and on far less memory.Open source
  21. 21StreamlitTurns a Python script into a shareable data or AI app.Open source
  22. 22GradioQuick web demos for machine-learning models, in a few lines of Python.Open source
  23. 23Weights & BiasesTrack experiments, evaluate models and trace LLM apps.Free plan
  24. 24FirecrawlTurns any website into clean, LLM-ready text or data.Free plan
  25. 25ExaA search engine built for AI agents to search the web through.Free plan
  26. 26Mistral La PlateformeMistral's API for its open and commercial models, with a free experiment tier.Free plan
  27. 27CohereEnterprise language models, embeddings and reranking.Free plan
  28. 28Together AIRun and fine-tune open models on fast, inexpensive GPU clouds.Paid
  29. 29Fireworks AIFast, low-cost inference and fine-tuning for open models.Paid
  30. 30DeepInfraPay-per-token APIs for popular open models.Paid
  31. 31CerebrasExtremely fast inference on wafer-scale chips.Free plan
  32. 32BasetenDeploy and scale AI models in production.Paid
  33. 33ModalServerless GPUs: run Python AI code in the cloud in seconds.Free plan
  34. 34RunPodRent GPUs by the second for training and inference.Paid
  35. 35LambdaA GPU cloud built for training and running AI.Paid
  36. 36Amazon BedrockMany leading models, and tools for agents, inside AWS.Paid
  37. 37Azure AI FoundryMicrosoft's platform to build, evaluate and deploy AI apps on Azure.Paid
  38. 38Vertex AIGoogle Cloud's platform for Gemini and other models, with MLOps.Paid
  39. 39PineconeA managed vector database for search and RAG.Free plan
  40. 40WeaviateAn open-source vector database with hybrid search.Open source
  41. 41QdrantA fast open-source vector database, written in Rust.Open source
  42. 42ChromaThe simple open-source embedding database for AI apps.Open source
  43. 43LangSmithTrace, test and monitor LLM apps and agents.Free plan
  44. 44LangfuseOpen-source tracing, evaluation and prompt management for LLM apps.Open source
  45. 45HeliconeOpen-source observability for LLM calls: costs, latency, logs.Open source
  46. 46BraintrustEvaluate prompts and models, and catch regressions before release.Free plan
  47. 47Arize PhoenixOpen-source tracing and evaluation for AI apps.Open source
  48. 48MastraA TypeScript framework for agents, workflows and RAG.Open source
  49. 49Pydantic AIA type-safe Python framework for building agents.Open source
  50. 50OpenAI Agents SDKOpenAI's lightweight framework for multi-agent workflows.Open source
  51. 51Agent Development KitGoogle's open-source framework for building and deploying agents.Open source
  52. 52AutoGenMicrosoft's framework for agents that work together in conversation.Open source
  53. 53HaystackAn open-source framework for RAG pipelines and agents in production.Open source
  54. 54DSPyProgram language models instead of prompting them, and optimise automatically.Open source
  55. 55llama.cppRuns language models efficiently on ordinary CPUs and GPUs, in C++.Open source
  56. 56MLXApple's array framework for machine learning on Apple silicon.Open source
  57. 57PyTorchThe deep-learning framework most AI research and models are built with.Open source
  58. 58TensorFlowGoogle's end-to-end platform for machine learning.Open source
  59. 59scikit-learnClassic machine learning in Python: classification, regression, clustering.Open source
  60. 60MLflowTrack experiments, manage models and evaluate GenAI apps.Open source
  61. 61KerasA friendly deep-learning API that runs on JAX, TensorFlow or PyTorch.Open source
  62. 62Label StudioOpen-source data labelling for text, images, audio and video.Open source
  63. 63RoboflowBuild and deploy computer-vision models, from labelling to the edge.Free plan
  64. 64KaggleDatasets, notebooks with free GPUs, and machine-learning competitions.Free
  65. 65Google ColabPython notebooks in the browser, with free GPUs to start.Free plan
  66. 66Lightning AICloud studios to code, train and serve models on GPUs.Free plan
  67. 67UnstructuredTurns PDFs, slides and messy documents into data ready for LLMs.Free plan
  68. 68Jina AIEmbeddings, rerankers and a reader that turns web pages into clean text.Free plan
  69. 69Voyage AIHigh-quality embeddings and rerankers for retrieval.Paid
  70. 70TavilyA search API made for AI agents and RAG.Free plan
  71. 71BrowserbaseHeadless browsers in the cloud for AI agents to drive.Free plan
  72. 72E2BSecure cloud sandboxes where AI agents can run code.Free plan
  73. 73GPT4AllRun language models privately on your own computer.Open source
  74. 74AnythingLLMA private all-in-one AI app: chat with documents, agents, any model.Open source
  75. 75LocalAIA drop-in, self-hosted replacement for the OpenAI API.Open source
  76. 76SmitheryA registry of MCP servers to plug tools into your AI apps.Free

Free to start: Hugging Face, Ollama, Workers AI all have a free plan or are free outright.

Popular open-source AI tools for building with AI on GitHub

By stars on GitHub.

  1. supabaseThe Postgres development platform. Supabase gives you a dedicated Postgres database to build your web, mobile, and AI applications.★ 111,681
  2. BMAD-METHODBreakthrough Method for Agile Ai Driven Development★ 54,255
  3. FabricFabric is an open-source framework for augmenting humans using AI. It provides a modular system for solving specific problems using a…★ 44,317
  4. DeepSpeedDeepSpeed is a deep learning optimization library that makes distributed training and inference easy, efficient, and effective.★ 43,239
  5. ColossalAIMaking large AI models cheaper, faster and more accessible★ 41,431
  6. Folo🧡 Folo is the AI RSS Reader★ 39,107
  7. spaCy💫 Industrial-strength Natural Language Processing (NLP) in Python★ 33,967
  8. netronVisualizer for neural network, deep learning and machine learning models★ 33,583
  9. layaNon-autoregressive System 1 decision engine. Typed choice, score and yes/no decisions over any text in a single forward pass, in 100+…★ 33,236
  10. openai-pythonThe official Python library for the OpenAI API★ 31,868

Apps to try in the browser, on Hugging Face Spaces

By likes on Hugging Face.

  1. 👕IDM VTONHigh-fidelity Virtual Try-on♥ 2,136
  2. 👯Dia 1.6BGenerate realistic dialogue from a script, using Dia!♥ 1,789
  3. 🐨Expression EditorQuickly edit the expression of a face♥ 1,671
  4. 🦀EasyControl GhibliNew Ghibli EasyControl model is now released!!♥ 1,450
  5. 🏃ProtectBirdsProtect Birds♥ 1,042
  6. 🐋DeepSite GalleryBrowse apps made with DeepSite♥ 941
  7. 🎙VoxCPM DemoVoxCPM2 Nano-vLLM Demo♥ 828
  8. 🍌Nano Banana PRONano Banana for Hugging Face PRO users♥ 765
  9. 💥InferenceSupportDiscussions about the Inference Providers feature on the Hub♥ 723
  10. 👕WeShopAI Virtual Try OnWeShopAI Virtual Try On. Switch outfits with ease virtually.♥ 558
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