Compare software

Letta vs Agent Zero: catalog facts
Letta	Agent Zero
Freemium The agent installs from npm; the homepage does not detail pricing.	Free Free to download and run; model API costs depend on the provider you use.
Command line	Self-hosted
Persistent memory that carries over between sessions Installs with a single npm command	Runs on your own hardware in Docker Web interface for working with the agent
Homepage gives few details on pricing or licensing Aimed at developers comfortable with the command line	Requires Docker and some technical setup An agent that runs code needs careful sandboxing
Downloadable app	Self-hosted
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	No account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 26, 2026	Official website Full listing and sources Checked September 26, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.