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Letta vs Goose: catalog facts
Letta	Goose
Freemium The agent installs from npm; the homepage does not detail pricing.	Free The open-source software is available without a license fee. Hosting, hardware and…
Command line	Windows, macOS, Linux
Persistent memory that carries over between sessions Installs with a single npm command	Connects model providers with tools through MCP extensions.
Homepage gives few details on pricing or licensing Aimed at developers comfortable with the command line	A configured model provider is required and may charge for use.
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: Apache-2.0
Not stated if an account is needed	Not stated if an account is 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 22, 2026

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