ONTHEIA
Your Data. Your AI. Your Rules.
Ontheia is a self-hosted, open-source AI agent platform. Run AI agents, automate workflows, and connect AI models to any tool — entirely on your own infrastructure, without sending data to external cloud services.
Content
Why Ontheia?
Every time you send a company document to a cloud AI, your data leaves your building. Ontheia keeps AI powerful — and keeps your data yours.
- GDPR-compliant by architecture — data never leaves your servers
- Vendor-agnostic — Claude, ChatGPT, Gemini, Grok, Ollama, or any OpenAI-compatible model
- MCP-native — connect agents to any external tool or service via open standard
- Multi-user — role-based access control, Row Level Security enforced at the database level
- Chain Engine — visual workflow automation, no code required
- Long-term Memory — built-in RAG with pgvector, isolated per user and namespace
- Agent-to-Agent — complex tasks coordinated across specialized sub-agents
- Cron Automation — schedule agent runs and chain executions on a time-based trigger
Screenshots
| Chat & Agents | MCP Tools in Action |
|---|---|
 |  |
Recommend Clients
TraeBuild with Free GPT-4.1 & Claude 3.7. Fully MCP-Ready.
y-cli 🚀A Tiny Terminal Chat App for AI Models with MCP Client Support
Cherry Studio🍒 Cherry Studio is a desktop client that supports for multiple LLM providers.
WindsurfThe new purpose-built IDE to harness magic
Roo Code (prev. Roo Cline)Roo Code (prev. Roo Cline) gives you a whole dev team of AI agents in your code editor.
HyperChatHyperChat is a Chat client that strives for openness, utilizing APIs from various LLMs to achieve the best Chat experience, as well as implementing productivity tools through the MCP protocol.
Continue⏩ Create, share, and use custom AI code assistants with our open-source IDE extensions and hub of models, rules, prompts, docs, and other building blocks
DeepChatYour AI Partner on Desktop
LutraLutra is the first MCP compatible client built for everyone
ZedCode at the speed of thought – Zed is a high-performance, multiplayer code editor from the creators of Atom and Tree-sitter.
ChatWiseThe second fastest AI chatbot™
CursorThe AI Code Editor
Y GuiA web-based graphical interface for AI chat interactions with support for multiple AI models and MCP (Model Context Protocol) servers.
Visual Studio Code - Open Source ("Code - OSS")Visual Studio Code
MCP ConnectEnables cloud-based AI services to access local Stdio based MCP servers via HTTP requests
GOOGLE-ADS---ADPLUGThe Google Ads MCP server for Claude and ChatGPT.
Connect Google Ads to the AI you already use. Ask it to audit search terms, check pacing, compare CPA, and prepare changes you can review before anything touches the account.
Cline – #1 on OpenRouterAutonomous coding agent right in your IDE, capable of creating/editing files, executing commands, using the browser, and more with your permission every step of the way.
Refact.aiOpen-source AI Agent for VS Code and JetBrains that autonomously solves coding tasks end-to-end.
chatmcpChatMCP is an AI chat client implementing the Model Context Protocol (MCP).
A Sleek AI Assistant & MCP Client5ire is a cross-platform desktop AI assistant, MCP client. It compatible with major service providers, supports local knowledge base and tools via model context protocol servers .
MCP PlaygroundCall MCP Server Tools Online