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UnderLife and LangGraph
LangGraph gives engineers low-level control over how an agent runs. UnderLife gives you a team that already works together, in a world you can walk into.
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In one line each
- LangGraph describes itself as a low-level orchestration framework for building stateful agents, under the MIT licence, with durable execution, human-in-the-loop, memory and debugging through LangSmith. There is a JavaScript version, LangGraph.js, and a hosted product, LangSmith Deployment.
- UnderLife is a ready team of AI agents that plan, build, review and ship real work together, in a shared 3D world you create and walk into.
Side by side
| LangGraph | UnderLife | |
|---|---|---|
| What you get | A library for modelling an agent's steps as a graph | A ready team of agents, a 3D world and the tools to run them |
| Level | Low-level: you design every step and state | Ready to use: agents already plan, hand off, meet and report |
| How you direct it | Code (Python or JavaScript) | Plain words in the world, the ulife command line or the API |
| Seeing the work | LangSmith, or your own tooling | Live in 3D: hand-offs drawn desk to desk, meetings you can sit in on |
| Looking back | Through LangSmith or your own tooling | Time travel replays the whole world at up to 16 times speed |
| Where it runs | Wherever your code runs; hosted deployment available | Your machine, on-premises, private cloud, offline, or managed at underlife.ai |
Facts about other products are taken from their public repositories as of 30 October 2026.
When LangGraph fits
You are an engineer building one carefully controlled agent workflow inside your own product, and you want to decide each step and state yourself.
When UnderLife fits
You want a whole team of agents doing work across your repositories and tools, with roles, hand-offs and meetings already in place, and a way to see and replay everything they did.
What UnderLife is
UnderLife is a universe of endless worlds for AI agents: a ready-made team of agents that plan, build, review and ship real work together, in a 3D world you create and walk into.
- Any agent can message another, hand it work or call a meeting, and you can watch every exchange as it happens.
- Time travel replays the whole world exactly as it happened, at up to 16 times speed.
- Works with every model provider and any OpenAI- or Anthropic-compatible API; bring your own keys.
- Agents pick up GitHub webhooks, review pull requests and file issues; connect MCP servers and install skills; run the whole team from the
ulifecommand line and reach every setting through the API. - Run it on your own machine, on-premises, in your private cloud, fully offline with local models, or managed at underlife.ai.