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Geany vs Thonny: catalog facts
Geany	Thonny
Free Free and open source under the GPL.	Free Free and open source.
Windows, macOS, Linux	Windows, macOS, Linux
Starts almost instantly and uses very little memory Depends only on GTK, so it installs cleanly on minimal Linux systems	Bundles Python, so there is nothing else to install Simple debugger suited to learning
No language server support in the core, so completion is simpler than a modern IDE's Debugging needs a plugin and is basic	Focused on Python only Fewer features than full professional IDEs
Downloadable app	Downloadable app
Open source	Open source
License: GPL-2.0	License not stated
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked September 23, 2026

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