# Letta vs Team0 | Team0

> Letta agents remember. Team0 understands. Letta agents edit their own memory. Team0 keeps one understanding, checked the same way, for every agent you use.

Agent-readable version of https://team0.ai/compare/letta. The page for people is at that address; this file carries the same content without layout.

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# Letta agents remember. Team0 understands.

Letta agents edit their own memory. Team0 keeps one understanding, checked the same way, for every agent you use.

## Where Team0 is different.

Not left to each agent
:   What gets kept, and what it replaces, is checked the same way every time, whichever agent sent it.

Tell one agent, the others know
:   Claude, ChatGPT, Claude Code, Codex, OpenClaw and other agents read the same understanding.

Built from all your work
:   Email, calendar, meetings, GitHub, Notion, HubSpot, Jira, Stripe and more, plus what your agents save.

Heard is not confirmed
:   A remark floated once on a call is kept, labelled as heard. It never overwrites what is confirmed.

Settled, or put to you
:   A change is settled when the evidence settles it. When two people still disagree, both are kept and marked, and your agent asks you.

Agents save evidence, not truth
:   What an agent saves is labelled with its name. One agent cannot quietly rewrite what the others read.

## Side by side.

Letta’s column uses its own words.

|  | Letta | Team0 |
| --- | --- | --- |
| What it is | “A self-improving AI agent whose memory, identity, and capabilities evolve with experience” | One understanding of your work that every agent reads |
| Who keeps memory | “The agent decides where the lesson belongs and commits the update” | Team0 checks every save the same way, whichever agent sent it |
| Which agents share it | “Shared memory gives multiple agents access to the same files”, for agents hosted in Letta Cloud | Claude, ChatGPT, Claude Code, Codex, OpenClaw and other agents you connect |
| What it learns from | Its conversations, reviewed in the background by “dreaming” | Agent conversations, email, calendar, meeting transcripts, documents, GitHub, Notion, HubSpot, Jira, Stripe and more |
| What agents save | Committed to the agent’s memory files | Kept as that agent’s evidence, never trusted on its own |
| Hosting | Letta Cloud, or self-hosted | Hosted by Team0 |

Building a product for your own users? Team0 has an invite-only API beta. [Build with the API](https://team0.ai/developers#api)

Letta details are from its own site and documentation, checked October 2026.

- [Supermemory vs Team0Memory engine for agents](https://team0.ai/compare/supermemory)
- [Mem0 vs Team0Memory infrastructure for agents and apps](https://team0.ai/compare/mem0)
- [Zep vs Team0Context platform for agents you build](https://team0.ai/compare/zep)
- [Claude and ChatGPT memory vs Team0Built-in assistant memory](https://team0.ai/compare/claude-and-chatgpt-memory)

- [OverviewThe World Model](https://team0.ai/world-model)
- [ArchitectureFollow one fact from email to every agent](https://team0.ai/world-model/architecture)
- [Data modelStatements, two clocks, belief lanes](https://team0.ai/world-model/data-model)
- [Entity resolutionOne person, one record, carefully](https://team0.ai/world-model/entity-resolution)
- [Truth maintenanceHow beliefs are retired, never deleted](https://team0.ai/world-model/truth-maintenance)
- [Trust and scopeWho said it, who may see it](https://team0.ai/world-model/trust-and-scope)
- [Understanding EngineFrom graph to a read an agent can use](https://team0.ai/world-model/understanding-engine)
- [Memory vs understandingWhat a memory layer does, and what understanding adds](https://team0.ai/memory-vs-understanding)
- [Markdown vs Team0Where notes files stop, and what keeps them true](https://team0.ai/markdown-second-brain)
- [The 31 problemsEverything you have to solve, in one list](https://team0.ai/agentic-understanding)

## Your agents will change. Your understanding shouldn’t.

[Build on the same understanding](https://team0.ai/developers)

Invite-only private beta.