# Best open source AI tools for SaaS companies > For a SaaS team, the core of a private AI stack is Ollama for running open models locally, LibreChat for a private chat interface and RAGFlow for answering questions over your documents, all running on your own servers so customer data can stay on your infrastructure. Each pick was chosen by hand for its job and is shown with GitHub data from October 2026. ## Key facts | Fact | Value | |---|---| | Question | What are the best open source AI tools for building SaaS AI features? | | Picks | 21 | | Top pick | Ollama (182,289 stars) | | Data as of | Oct 7, 2026 | | Canonical URL | https://appsgit.com/best/ai-tools-for-saas | Open-source AI infrastructure for teams shipping AI features: local model runners, agent builders, RAG engines and LLM observability you can run next to your product. ## Run models on your own hardware Model runners that serve open-weight LLMs on your own CPU or GPU, with an OpenAI-compatible API the other tools can call. - [Ollama](https://appsgit.com/apps/ollama) (182,289 stars, MIT, Go, Docker, AI features): Ollama has 182,289 GitHub stars, uses the MIT license, ships a Docker image and had 1,083 commits in the last year; it replaces ChatGPT. - [LocalAI](https://appsgit.com/apps/localai) (49,405 stars, MIT, Go, Docker, AI features): LocalAI has 49,405 GitHub stars, uses the MIT license, ships a Docker image and had 3,438 commits in the last year; it replaces ChatGPT. - [LLM Harbor](https://appsgit.com/apps/llm-harbor) (3,237 stars, Apache-2.0, Python, Docker, AI features): LLM Harbor has 3,237 GitHub stars, uses the Apache-2.0 license, ships a Docker image and had 1,288 commits in the last year. ## Private chat interface Chat front ends for your team. Point them at a local model and prompts never leave your network. - [LibreChat](https://appsgit.com/apps/librechat) (45,318 stars, MIT, TypeScript, Docker, AI features): LibreChat has 45,318 GitHub stars, uses the MIT license, ships a Docker image and had 2,074 commits in the last year; it replaces ChatGPT and Lovable. - [Open-WebUI](https://appsgit.com/apps/open-webui) (154,037 stars, Open WebUI License, source-available, Python, Docker, AI features): Open-WebUI has 154,037 GitHub stars, is source-available under the Open WebUI License (BSD-3-Clause plus branding clause) (not an open-source license), ships a Docker image and had 4,746 commits in the last year; it replaces ChatGPT and Lovable. - [LobeHub](https://appsgit.com/apps/lobehub) (83,008 stars, LobeHub Community License, source-available, TypeScript, Docker, AI features): LobeHub has 83,008 GitHub stars, is source-available under the LobeHub Community License (not an open-source license), ships a Docker image and had 7,488 commits in the last year; it replaces ChatGPT and Lovable. - [Onyx Community Edition](https://appsgit.com/apps/onyx-community-edition) (32,332 stars, MIT, Python, Docker, AI features): Onyx Community Edition has 32,332 GitHub stars, uses the MIT license, ships a Docker image and had 5,771 commits in the last year. ## Questions over your documents (RAG) Retrieval-augmented generation: index your own files and ask questions about them. - [RAGFlow](https://appsgit.com/apps/ragflow) (91,708 stars, Apache-2.0, Go, Docker, AI features): RAGFlow has 91,708 GitHub stars, uses the Apache-2.0 license, ships a Docker image and had 5,821 commits in the last year. - [AnythingLLM](https://appsgit.com/apps/anythingllm) (66,738 stars, MIT, JavaScript, Docker, AI features): AnythingLLM has 66,738 GitHub stars, uses the MIT license, ships a Docker image and had 887 commits in the last year; it replaces ChatGPT. - [Khoj](https://appsgit.com/apps/khoj) (37,565 stars, AGPL-3.0, Python, Docker, AI features): Khoj has 37,565 GitHub stars, uses the AGPL-3.0 license, ships a Docker image and had 120 commits in the last year; it replaces ChatGPT. ## Agents and workflows Visual builders that chain models, tools and your own APIs into agents and automations. - [Langflow](https://appsgit.com/apps/langflow) (155,530 stars, MIT, Python, Docker, AI features): Langflow has 155,530 GitHub stars, uses the MIT license, ships a Docker image and had 2,486 commits in the last year. - [Dify.ai](https://appsgit.com/apps/dify-ai) (157,921 stars, Dify Open Source License, source-available, TypeScript, Docker, AI features): Dify.ai has 157,921 GitHub stars, is source-available under the Dify Open Source License (modified Apache 2.0) (not an open-source license), ships a Docker image and had 6,112 commits in the last year; it replaces ChatGPT and Lovable. - [n8n](https://appsgit.com/apps/n8n) (206,738 stars, Sustainable Use License, source-available, TypeScript, Docker): n8n has 206,738 GitHub stars, is source-available under the Sustainable Use License 1.0 (not an open-source license), ships a Docker image and had 9,029 commits in the last year; it replaces Zapier and IFTTT. - [Activepieces](https://appsgit.com/apps/activepieces) (24,913 stars, MIT, TypeScript, Docker, AI features): Activepieces has 24,913 GitHub stars, uses the MIT license, ships a Docker image and had 5,647 commits in the last year; it replaces Zapier and IFTTT. ## LLM observability and gateways Trace prompts, measure cost and evaluate answers once AI features reach production. - [Langfuse](https://appsgit.com/apps/langfuse) (35,416 stars, MIT, TypeScript, Docker, AI features): Langfuse has 35,416 GitHub stars, uses the MIT license, ships a Docker image and had 4,298 commits in the last year; it replaces Sentry. - [Opik](https://appsgit.com/apps/opik) (22,399 stars, Apache-2.0, Python, Docker, AI features): Opik has 22,399 GitHub stars, uses the Apache-2.0 license, ships a Docker image and had 3,961 commits in the last year. - [Agenta](https://appsgit.com/apps/agenta) (4,807 stars, MIT, TypeScript, Docker, AI features): Agenta has 4,807 GitHub stars, uses the MIT license, ships a Docker image and had 18,955 commits in the last year. - [GoModel](https://appsgit.com/apps/gomodel) (1,219 stars, MIT, Go, Docker, AI features): GoModel has 1,219 GitHub stars, uses the MIT license, ships a Docker image and had 657 commits in the last year. ## What to connect it to - [Supabase](https://appsgit.com/apps/supabase) (111,147 stars, Apache-2.0, TypeScript, Docker): Supabase has 111,147 GitHub stars, uses the Apache-2.0 license, ships a Docker image and had 6,123 commits in the last year; it replaces Firebase. - [PostHog](https://appsgit.com/apps/posthog) (40,156 stars, MIT, Python, AI features): PostHog has 40,156 GitHub stars, uses the MIT license and had 35,167 commits in the last year; it replaces Google Analytics and Metabase Cloud. - [Chatwoot](https://appsgit.com/apps/chatwoot) (37,569 stars, MIT, Ruby, Docker): Chatwoot has 37,569 GitHub stars, uses the MIT license, ships a Docker image and had 1,379 commits in the last year; it replaces Zendesk and Intercom. ## How this list was made - Apps were picked by hand from the appsgit catalog for each job, then checked against the snapshot: unknown or archived projects and projects with no commit in two years are dropped automatically. - Inside each section the curated order is kept, most broadly useful first; an app appears only once on the page. - Stars, license, Docker and activity facts come from the GitHub API as of October 2026. - Source-available apps are labelled; they are not open source, so read their licenses before commercial use. ## FAQ ### Do I need LLM observability? Once AI features reach users, yes. Langfuse, Opik and Agenta trace prompts and responses, track cost and help you evaluate answers, which is how you catch regressions when you change a model or prompt. ### What hardware do I need to run AI models myself? Small open models run on a modern CPU with 16 GB of RAM, but a GPU with enough video memory for the model you pick makes answers much faster. Start with a small model in Ollama, measure the speed on your own hardware, then size up. ### Is Ollama free? Yes. Ollama is open-source software released under the MIT license, so you can self-host it at no cost. You only pay for the server it runs on, and some projects also offer an optional paid cloud plan. ### Can I run this stack with Docker? 20 of the 21 apps here publish Docker images, including Ollama, LocalAI and LLM Harbor, so most of the stack can run side by side with Docker Compose on one server. Size the server for the heaviest app and add off-site backups. ## Related questions - [What open source software should a SaaS company self-host?](https://appsgit.com/best/open-source-software-for-saas) - [What is the best open source software for marketing agencies?](https://appsgit.com/best/open-source-software-for-agencies) - [What are the best open source AI tools for marketing?](https://appsgit.com/best/ai-tools-for-marketing) - [What is the best open source software for schools?](https://appsgit.com/best/open-source-software-for-schools) - [What is the best open source student management system?](https://appsgit.com/best/student-management-systems) - [What are the best open source AI tools for schools and teachers?](https://appsgit.com/best/ai-tools-for-education) - [What is the best open source software for restaurants and hotels?](https://appsgit.com/best/open-source-software-for-restaurants) - [What is the best open source software for manufacturing?](https://appsgit.com/best/open-source-software-for-manufacturing) ## See also - [All AI & LLM tools apps](https://appsgit.com/categories/ai-tools) - [All low-code & backend apps](https://appsgit.com/categories/low-code) - [All automation & workflows apps](https://appsgit.com/categories/automation) - [All developer tools apps](https://appsgit.com/categories/developer-tools) - [Open-source alternatives to ChatGPT](https://appsgit.com/alternatives/chatgpt) - [Open-source alternatives to Lovable](https://appsgit.com/alternatives/lovable) - [Open-source alternatives to Zapier](https://appsgit.com/alternatives/zapier) - [Open-source alternatives to IFTTT](https://appsgit.com/alternatives/ifttt) - [Open-source alternatives to Buffer / Hootsuite](https://appsgit.com/alternatives/hootsuite) - [Open-source alternatives to Sentry](https://appsgit.com/alternatives/sentry) - [Ollama vs LocalAI](https://appsgit.com/compare/ollama-vs-localai) - [Open WebUI vs LibreChat](https://appsgit.com/compare/open-webui-vs-librechat) - [n8n vs Activepieces](https://appsgit.com/compare/n8n-vs-activepieces) - [n8n vs Node-RED](https://appsgit.com/compare/n8n-vs-node-red) - [n8n vs Huginn](https://appsgit.com/compare/n8n-vs-huginn) - [PocketBase vs Supabase](https://appsgit.com/compare/pocketbase-vs-supabase) - [How to self-host Ollama with Docker Compose](https://appsgit.com/guides/ollama) - [How to self-host Open WebUI with Docker Compose](https://appsgit.com/guides/open-webui) - [How to self-host n8n with Docker Compose](https://appsgit.com/guides/n8n) - [How to self-host Supabase with Docker Compose](https://appsgit.com/guides/supabase) --- Canonical page: https://appsgit.com/best/ai-tools-for-saas Source: appsgit (https://appsgit.com), the app store for github. Data from the GitHub API, refreshed nightly. Machine access: JSON API https://appsgit.com/api/v1/apps (OpenAPI: https://appsgit.com/openapi.json), MCP server https://mcp.appsgit.com/mcp, full index https://appsgit.com/llms-full.txt.