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Head-to-head · Debuggers

GDB vs Xdebug

  • Updated Oct 2026
  • Both researched from official sources
  • 6 checks side by side
Higher score GDB #1 in Debuggers 9.4/10 Free plan Free plan✓ 5 of 5 features Visit GNU Project
Xdebug #5 in Debuggers 8.6/10 Free plan Free plan✓ 3 of 5 features Visit Xdebug

GDB leads on 0 checks, Xdebug on 0, and 6 are even. Who comes out ahead on the 6 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreGDB · 9.4/10
  • Free planboth
  • Most featuresGDB · 5 of 5

GDB scores higher on our rubric for debuggers: 9.4 against 8.6 out of 10; our editors rank them #1 and #5.

GDB is the better fit for broad native and systems debugging. Xdebug is the better fit for PHP web application debugging.

  • GDB fits best

    Broad native and systems debugging

  • Xdebug fits best

    PHP web application debugging

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Side by side

Feature GDB 9.4/10 Visit ↗ Xdebug 8.6/10 Visit ↗
At a glance
Editor score 9.4 8.6
Ranking #1 in Debuggers #5 in Debuggers
Best for Broad native and systems debugging PHP web application debugging
Pricing model Free Free plan + paid
Starting price Free plan £200/user/yr
Free plan ✓ ✓
Free trial — —
Deployment Desktop Self-hosted
Platforms Windows, macOS, Linux Web, Windows, macOS, Linux
Support Community, Docs Email, Community, Docs
Built for Solo, Small business, Mid-market, Enterprise Solo, Small business, Mid-market, Enterprise
Features GDB 5/5 · Xdebug 3/5
Remote debugging ✓ ✓
Conditional breakpoints ✓ ✓
Exception breakpoints ✓ ✓
Time-travel debugging ✓ (best) Not checked yet
Core dump debugging ✓ (best) Not checked yet
Specs
Supported languages Ada, Assembly, C, C++, D, Fortran, Go, Objective-C, OpenCL, Modula-2, Pascal, Rust PHP
Target platforms UNIX, Microsoft Windows, macOS; native, remote, and simulator targets Linux, macOS, Windows, web/CLI PHP environments
Our review
Pros
  • Supports Ada, C, C++, Go, Rust, Fortran, Pascal, and assembly
  • Includes remote debugging, core dumps, and simulator targets
  • Offers reverse execution, replay, and program-state modification
  • Interactive and remote debugging with conditional and exception breakpoints
  • Profiling, tracing, stack traces, and code coverage in one PHP extension
  • Works with Visual Studio Code, PhpStorm, Eclipse, and other listed tools
Cons
  • No AI-assisted debugging features
  • Remote debugging uses serial, socket, TCP, or UDP connections
  • Its language coverage centers on native and systems-oriented development
  • Focused on PHP rather than multi-language debugging
  • Advanced support requires a paid annual subscription
  • The Community plan provides low issue priority and Stack Overflow support
Our verdict

GDB is a free, open-source source-level debugger for examining programs while they run or after they crash. It is aimed at developers working across native applications, systems software, embedded or remote targets, and simulator…

Read the review →

Xdebug is an open-source PHP extension for developers who need more than basic error messages. It supports interactive step debugging through an IDE or editor, remote debugging connections, conditional and exception breakpoints, enhanced…

Read the review →
  1. GDBDebuggers 9.4Free plan
  2. XdebugDebuggers 8.6Free plan

Strengths and trade-offs

  • GDB — where it wins

    • Supports Ada, C, C++, Go, Rust, Fortran, Pascal, and assembly
    • Includes remote debugging, core dumps, and simulator targets
    • Offers reverse execution, replay, and program-state modification

    Where it doesn't

    • No AI-assisted debugging features
    • Remote debugging uses serial, socket, TCP, or UDP connections
    • Its language coverage centers on native and systems-oriented development

  • Xdebug — where it wins

    • Interactive and remote debugging with conditional and exception breakpoints
    • Profiling, tracing, stack traces, and code coverage in one PHP extension
    • Works with Visual Studio Code, PhpStorm, Eclipse, and other listed tools

    Where it doesn't

    • Focused on PHP rather than multi-language debugging
    • Advanced support requires a paid annual subscription
    • The Community plan provides low issue priority and Stack Overflow support

More comparisons

All debuggers comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update