Self-hosted AI chat: open-source ChatGPT and Claude UI alternatives
ChatGPT Plus is $20/mo per user. Claude Pro is $20/mo per user. Self-hosted Open WebUI, LibreChat, and ChatGPT-Next-Web give the same chat UX with multi-model support (OpenAI, Anthropic, local Llama) on a $5/mo VPS, billed only by API usage.
The 24 picks, ranked by health
Health score is a 6-dimension composite. See methodology.
The Postgres development platform. Supabase gives you a dedicated Postgres database to build your web, mobile, and AI applications.
A privacy-first, self-hosted, fully open source personal knowledge management software, written in typescript and golang.
A high-throughput and memory-efficient inference and serving engine for LLMs
Enhanced ChatGPT Clone: Features Agents, MCP, DeepSeek, Anthropic, AWS, OpenAI, Responses API, Azure, Groq, o1, GPT-5, Mistral, OpenRouter, Vertex AI, Gemini, Artifacts, AI model switching, message search, Code Interpreter, langchain, DALL-E-3, OpenAPI Actions, Functions, Secure Multi-User Auth, Presets, open-source for self-hosting. Active.
Test your prompts, agents, and RAGs. Red teaming/pentesting/vulnerability scanning for AI. Compare performance of GPT, Claude, Gemini, Llama, and more. Simple declarative configs with command line and CI/CD integration. Used by OpenAI and Anthropic.
User-friendly AI Interface (Supports Ollama, OpenAI API, ...)
The fastest path to AI-powered full stack observability, even for lean teams.
Fabric is an open-source framework for augmenting humans using AI. It provides a modular system for solving specific problems using a crowdsourced set of AI prompts that can be used anywhere.
Transformers: the model-definition framework for state-of-the-art machine learning models in text, vision, audio, and multimodal models, for both inference and training.
A lightning-fast search engine API bringing AI-powered hybrid search to your sites and applications.
LlamaIndex is the leading document agent and OCR platform
LocalAI is the open-source AI engine. Run any model - LLMs, vision, voice, image, video - on any hardware. No GPU required.
LocalAI is the open-source AI engine. Run any model - LLMs, vision, voice, image, video - on any hardware. No GPU required.
AI-Powered Photos App for the Decentralized Web
Open-source AI orchestration framework for building context-engineered, production-ready LLM applications. Design modular pipelines and agent workflows with explicit control over retrieval, routing, memory, and generation. Built for scalable agents, RAG, multimodal applications, semantic search, and conversational systems.
The all-in-one AI productivity accelerator. On device and privacy first with no annoying setup or configuration.
Jan is an open source alternative to ChatGPT that runs 100% offline on your computer.
TiDB is built for agentic workloads that grow unpredictably, with ACID guarantees and native support for transactions, analytics, and vector search. No data silos. No noisy neighbors. No infrastructure ceiling.
AI Data Vault - A query engine for AI Agents to securely query data from any datasource
NVR with realtime local object detection for IP cameras
Go language library for reading and writing Microsoft Excel™ (XLAM / XLSM / XLSX / XLTM / XLTX) spreadsheets
Python-powered shell. Full-featured, cross-platform and AI-friendly.
The agent engineering platform. Available in TypeScript!
Milvus is a high-performance, cloud-native vector database built for scalable vector ANN search
Specifically replacing
These categories on ossreplace cover the SaaS in this space.
Ready to self-host?
Most operators land on supabase (top health) and run it on hetzner for around $4.13/mo.