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solidtime vs TimeTagger: catalog facts
solidtime	TimeTagger
Free Free and open source to self-host; a hosted cloud version is also offered.	Freemium Self-hosting is free; the hosted service is paid after a 14-day free trial.
Web, Self-hosted, Browser extension	Web, Self-hosted
Clean, modern interface Flexible billable rates	Interactive timeline for quick insight into spent time PDF and CSV reports suitable for client billing
No invoicing described in its feature list Self-hosting requires following separate guides	Hosted service requires a paid subscription after the trial Pomodoro feature is experimental
Downloadable app, Self-hosted, Hosted service, Browser extension	Web application, Self-hosted, Hosted service
Open source	Open source
License: AGPL-3.0	License: GPL-3.0
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

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