Free
Added on Nov 13,2026
Omnigraph is an open-source, object-storage native graph database with branching and a typed ontology, built so that AI agents can safely collaborate on shared knowledge.
All agents share one typed schema of the domain they work in, and every write is checked against it. Agents each work on their own branch, and changes merge into main only after review by a human or another agent, using Git-style workflows with three-way merges and a full commit history.
Retrieval combines graph traversal, vector search, full-text search and hybrid search in one query, which suits GraphRAG, agent memory and context graphs.
Key features include zero-copy branching and time travel, in-engine policy using Cedar, Terraform-style declarative configuration, storage as open Lance files, and Studio, a desktop app for macOS, Linux and Windows to visualise the graph, inspect records, query safely and approve merges.
It works with a CLI, a TypeScript SDK, a Python SDK and a built-in MCP server, and it can be set up by pasting an onboarding prompt into a coding agent such as Claude Code.
Omnigraph can run embedded as a folder on a local machine, in a team's own AWS, Azure or GCP account, on-premises with any S3-compatible store, or on Omnigraph Cloud, which is in private preview. Runnable cookbooks cover company brains, industry and pharma intelligence, VC deal flow, coding agent work queues and personal second brains.
Pricing: the engine is free and MIT-licensed open source, and users pay only for their own storage and compute.
It is suited to AI engineers and data teams building agent memory, company knowledge graphs or multi-agent systems that need reviewed, versioned shared context.
Popular alternatives to Omnigraph include Pollinations, NemoClaw and Agnes AI. Compare their pricing and what each is best for below.
| Tool | Pricing | Best for |
|---|---|---|
| Pollinations | Freemium | Developers and hobby builders who want a single API for adding AI images, audio and text to their websites, bots and app... |
| NemoClaw | Free | Developers and platform teams who want to run always-on AI agents on NVIDIA hardware under policy-based security control... |
| Agnes AI | Freemium | Developers building AI-powered apps who want access to several models through one API. |
| OrcaRouter | Freemium | Developers and teams who want to balance AI quality and cost across many models. |
| DiagramGPT | Free | Developers and students who need to sketch system designs and workflows quickly by describing them in words. |
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