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GRASS vs Manifold: catalog facts
GRASS	Manifold
Free Free and open source, with community and commercial support available.	Paid One-time purchase of $145, fully paid.
Windows, macOS, Linux	Windows
Broad raster, vector and imagery processing Temporal framework for time series analysis	Automatic parallel processing on multiple CPU cores and GPUs Handles large datasets such as lidar quickly
Steep learning curve for newcomers Geared to analysis rather than simple map viewing	Windows only Proprietary, with a smaller user community than QGIS or ArcGIS
Downloadable app	Downloadable app
Open source	Closed source
License not stated	License: Proprietary
No account needed	Not stated if an account is needed
Works offline	Works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked October 2, 2026

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