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Scalene alternatives

Scalene focuses on Python performance, profiling CPU, GPU, and memory use with line- and function-level detail. It separates Python time from native-code and system time, reports likely memory leaks, and can attribute async wait time to suspended coroutines. Its GUI can show stitched call stacks, memory flame charts, and timelines; optimization proposals can use supported cloud or local AI providers. You can run it from the command line, web interface, Visual Studio Code extension, or Jupyter notebooks, and it is free and open source.

1. 1 G

   Grafana Cloud Application Observability

   Free plan AndroidAPIExtension+5

   Application monitoring across connected services — Grafana Cloud adds service discovery, RED health metrics, and cross-stack root-cause analysis to unified metrics, logs, traces, and profiles.

   7.4 Free plan · paid from $0.03 Visit site
2. 2 Y

   YourKit .NET Profiler

   Free plan APILinuxMac+1

   .NET performance and memory investigations — YourKit profiles .NET and .NET Core applications, with heap views, database and web request analysis, and Visual Studio and Rider plugins.

   6.9 From $99/user/yr · 15-day trial Visit site
3. 3

   Javadoc

   Free plan LinuxMacWeb+1

   Generating Java API documentation — Javadoc generates HTML API documentation from Java source files instead of profiling runtime performance.

   7.4 30-day trial Visit site
4. 4 N

   Node.js --prof

   Free plan LinuxMacSelf-hosted+1

   Generating V8 profiles for Node.js — Node.js --prof generates V8 profiler output for JavaScript, while Scalene profiles Python CPU, GPU, and memory use.

   7.2 Free plan Visit site
5. 5

   Parca

   Free plan APILinuxSelf-hosted+1

   Continuous multi-language profile collection — Parca continuously collects and stores profiles over time, with eBPF stack traces, label-based queries, and comparisons across code versions.

   7.2 Open source Visit site
6. 6 P

   py-spy

   Free plan LinuxMacWindows

   Low-overhead Python sampling without restarts — py-spy samples Python processes externally and can profile them without restarting or changing code, but does not offer Scalene's GPU and memory analysis.

   6.9 Open source Visit site
7. 7 P

   Pyroscope

   Free plan LinuxMacWeb+1

   Multi-language continuous CPU profiling — Pyroscope supports CPU profiling across many languages, with free and paid plans that specify ingestion and retention limits.

   6.5 Free plan · paid from $19/mo Visit site
8. 8

   Amazon CodeGuru Profiler

   Free plan APILinuxSelf-hosted+1
   7.7 From $0.01 · 90-day trial Visit site
9. 9

   Blackfire.io

   Free plan APIExtensionLinux+3
   7.6 From €33.25/mo (annual) Visit site
10. 10 A

    async-profiler

    Free plan APILinuxMac
    7.5 Free plan Visit site
11. 11 G

    Google Cloud Profiler

    Free plan APILinuxSelf-hosted+1
    7.5 Free plan Visit site
12. 12 G

    GNU gprof

    Free plan LinuxSelf-hosted
    7.3 Open source Visit site
13. 13 I

    Intel VTune Profiler

    Free plan LinuxSelf-hostedWindows
    7.3 Free plan Visit site
14. 14 Y

    YourKit Java Profiler

    Free plan APILinuxMac+2
    6.9 From $99/user/yr · 15-day trial Visit site
15. 15 G

    Go pprof

    Free plan API
    6.8 Free plan Visit site
16. 16 G

    Grafana Alerting

    Free plan LinuxMacWeb+1
    6.8 Free plan · paid from $20/user Visit site
17. 17 V

    Valgrind

    Free plan AndroidLinuxMac
    6.8 Open source Visit site
18. 18 V

    VisualVM

    Free plan LinuxMacWindows
    6.8 Free plan Visit site
19. 19 J

    JetBrains dotMemory

    Free trial APILinuxMac+2
    6.3 30-day trial Visit site
20. 20 J

    JetBrains dotTrace

    Free trial APILinuxMac+2
    6.2 Visit site
21. 21

    JProfiler

    Free trial APILinuxMac+2
    6.2 Visit site
22. 22 P

    Polar Signals Cloud

    Free trial APILinuxSelf-hosted+1
    6.0 From $50/mo · 14-day trial Visit site
23. 23 K

    KCachegrind

    Free plan Linux
    5.7 Free plan Visit site
24. 24 N

    .NET Memory Profiler

    Free trial Windows
    5.7 From $189 · 7-day trial Visit site

A different tool may suit you better if you need to monitor services across a stack, profile another language, or generate documentation rather than inspect runtime performance. Scalene supports Python, and its GPU reports cover NVIDIA-based systems. Compare alternatives by language and runtime, the signals they analyze, and whether they focus on a single program or connected services. Also consider remote profiling, deployment needs, integrations, operating-system coverage, and any usage charges or trial terms before switching.

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