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Goose vs Letta: catalog facts
Goose	Letta
Free The open-source software is available without a license fee. Hosting, hardware and…	Freemium The agent installs from npm; the homepage does not detail pricing.
Windows, macOS, Linux	Command line
Connects model providers with tools through MCP extensions.	Persistent memory that carries over between sessions Installs with a single npm command
A configured model provider is required and may charge for use.	Homepage gives few details on pricing or licensing Aimed at developers comfortable with the command line
Downloadable app	Downloadable app
Open source	Closed source
License: Apache-2.0	License not stated
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 22, 2026	Official website Full listing and sources Checked September 26, 2026

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