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
Letta details are from its own site and documentation, checked October 2026.
Other comparisons
- Supermemory vs Team0Memory engine for agents
- Mem0 vs Team0Memory infrastructure for agents and apps
- Zep vs Team0Context platform for agents you build
- Claude and ChatGPT memory vs Team0Built-in assistant memory
How Team0 works
- OverviewThe World Model
- ArchitectureFollow one fact from email to every agent
- Data modelStatements, two clocks, belief lanes
- Entity resolutionOne person, one record, carefully
- Truth maintenanceHow beliefs are retired, never deleted
- Trust and scopeWho said it, who may see it
- Understanding EngineFrom graph to a read an agent can use
- Memory vs understandingWhat a memory layer does, and what understanding adds
- Markdown vs Team0Where notes files stop, and what keeps them true
- The 31 problemsEverything you have to solve, in one list
Your agents will change. Your understanding shouldn’t.
Invite-only private beta.