atop

A full-screen Linux performance monitor that reports and logs system and per-process resource usage.

FreeProprietaryLinuxCommand line
Official websiteatoptool.nlDownload pageatoptool.nl

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Package managers

About atop

atop is a terminal performance monitor for Linux. At regular intervals it shows activity for CPU, memory, swap, disks including LVM, and network, plus per-process and per-thread details such as CPU use, memory growth, disk use, state and exit code. It also counts processes that finished during the interval and highlights overloaded resources with colors.

It can log system and process activity daily for later analysis. With the optional netatop kernel module it also shows network activity per process. Version 2.13.0 was released in July 2026.

Strengths

  • Includes processes that finished during the interval
  • Daily logging for long-term analysis
  • Color highlighting of overloaded resources
  • Per-process network activity with netatop

Limitations

  • Linux only
  • Per-process network data needs an extra kernel module

Details

Pricing
FreeFree to download and use.
License
Proprietary
Developer
Atoptool.nl
Platforms
Linux, Command line
How it runs
Downloadable app
Account
Not required
Works offline
Yes
Best suited for
Linux administrators investigating performance problems over time
Last verified
Added
Provenance
Facts checked against the developer's own pages and store listings, 1 sources on file.

Alternatives to atop

Compare all

Software that can replace atop for an important use case, and what changes if you switch.

  • htop

    Interactive process viewer for the terminal.

    FreeOpen sourcemacOSLinuxCommand line

    htop gives an interactive, open source process viewer that also runs on macOS, but has no historical logging, so past intervals cannot be reviewed.

  • btop++

    A terminal resource monitor that looks good enough to leave open, with processes, CPU, memory, disks, network and GPUs.

    FreeOpen sourcemacOSLinuxCommand line

    btop++ offers graphs for CPU, memory, disks, network and GPUs and runs on macOS, but does no historical logging, unlike atop's daily logs.

  • below

    A Linux resource monitor that records system, cgroup and process statistics and replays them later.

    FreeOpen sourceLinuxCommand line

    below keeps atop's record-and-replay approach and adds a cgroup hierarchy view, and is open source under Apache-2.0, though it targets servers more than desktops.

  • nmon

    A terminal performance monitor for Linux and AIX showing CPU, memory, disks, network and processes.

    FreeProprietaryLinuxCommand line

    nmon shows many metrics on one screen and records to CSV, runs on Linux and AIX across several architectures, and feeds InfluxDB and Grafana via njmon.

  • sysstat

    Collection of Linux command-line performance tools including sar, iostat, mpstat and pidstat.

    FreeOpen sourceLinuxCommand line

    sysstat records historical activity with sar and covers CPU, disk, per-process and network statistics, but uses plain text output instead of a full-screen interface.

  • Glances

    A cross-platform system monitor that runs in a terminal, in a browser, or as an API feeding a dashboard.

    FreeOpen sourceWindowsmacOSLinuxCommand lineWeb

    Glances runs on Linux, macOS and Windows, adds a web interface and exports to InfluxDB or Elasticsearch, but is Python based and heavier than atop.

  • bottom

    A graphical system monitor for the terminal, with charts for CPU, memory, network, temperature and disk over time.

    FreeOpen sourceWindowsmacOSLinuxCommand line

    bottom plots resources over time in a terminal on Linux, macOS and Windows under MIT, but keeps no long-term logs for analysis.

  • Performance Co-Pilot

    A toolkit for collecting, archiving and analysing performance metrics across many systems.

    FreeOpen sourcemacOSLinuxSelf-hostedCommand line

    Performance Co-Pilot records and analyses metrics across many hosts with live and archived views, but has a steeper learning curve than a single-machine monitor.

atop as an alternative

Listings that name atop as an alternative.

  • iotop-c

    A top-like Linux terminal tool that shows disk read and write activity for each process.

    FreeOpen sourceLinuxCommand line

    atop is a full-screen Linux monitor covering all resources per process, including finished processes, with daily logging for long-term analysis beyond disk I/O.

Similar software

Related functionality, not necessarily a direct replacement.

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