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below vs atop: catalog facts
below	atop
Free Free and open source.	Free Free to download and use.
Linux, Command line	Linux, Command line
Records data so past events can be replayed Shows the cgroup hierarchy alongside process details	Includes processes that finished during the interval Daily logging for long-term analysis
Linux only Aimed at servers rather than casual desktop use	Linux only Per-process network data needs an extra kernel module
Downloadable app	Downloadable app
Open source	Closed source
License: Apache-2.0	License not stated
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

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