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bottom (btm)

Free#15 of 26 in Process Monitoring Software

bottom (btm): A free, open-source monitor for interactive local system and process visibility. Ranked #15 of 26 in Process Monitoring Software by our editors (7.9/10); pricing: Free plan; best for free cross-platform interactive system monitoring.

7.9/10Editor score

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bottom (btm)7.9 Visit bottom

At a glance

Editor score
7.9 / 10
Pricing
Free plan
Best for
Free cross-platform interactive system monitoring
Free plan
Yes
Paid from
Free
Facts checked
21 Sep 2026

Where it wins
- Open-source monitoring across Windows, macOS, and Linux
- Graphs, widgets, filters, process trees, and configurable layouts
- Process sorting, search, grouping, and termination controls
Where it doesn't
- No verified alerting capabilities
- No remote monitoring or integrations
- History is configurable by graph range rather than retention period

Our verdict on bottom (btm)

bottom (btm) is an open-source, terminal-based graphical process and system monitor for developers, system administrators, and command-line users. It runs on Linux, macOS, and Windows, with views for CPU, memory, swap, network, temperature, disk I/O, disk capacity, and battery information. Its process table includes CPU, memory, I/O, user, state, and uptime data, while process tree mode helps show relationships between running processes. The free distribution includes prebuilt binaries and package-manager installation options.

The strongest fit is interactive, local host monitoring. Users can sort, group, filter, and search processes, inspect them in a tree, and terminate selected processes with kill-signal controls. System information appears through configurable widgets and graphs, and command-line or configuration-file customization supports tailored layouts, themes, filters, and widget arrangements. These capabilities make bottom (btm) particularly suitable when visibility and direct process control matter more than centralized administration.

Its scope is narrower than a monitoring system designed for alerting or fleet operations. The product focuses on the current host rather than remote monitoring, integrations, or verified alert workflows. Documentation describes configurable historical graph ranges, but the product is best understood as an interactive terminal monitor rather than a long-term observability platform. Choose bottom (btm) for free, cross-platform process inspection and customization; choose another product when remote visibility, connected services, or alert-driven monitoring are central requirements.

Your product? Our editors can test bottom (btm) in depth and publish a review, labelled as paid · from $149/mo →

bottom (btm) pricing

Plans Free planFree Free to use — no paid tier required for the core job.

See plans on bottom.pages.dev

bottom (btm) fact sheet

Free plan	Yes
Paid from	Free
Supported platforms	Linux, macOS, Windows
Remote monitoring	Not verified
Service monitoring	Not verified
Process alerting	Not verified
History retention	Not verified
Process controls	Yes
Activity logs	Not verified
Deployment	Desktop
Platforms	Windows, macOS, Linux
Support	Community, Docs
Built for	Solo, Small business (editorial estimate)
Pricing	Free plan
Website	bottom.pages.dev
Facts checked	21 Sep 2026

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Featured on iTechGuides

bottom (btm) is listed in our Process Monitoring Software directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Last updated 7 Oct 2026 · How we research and update