Best Debuggers in 2026
Updated
In short: Delve is ranked #1 of 26 as of 3 October 2026, ahead of GDB and LLDB. The best-ranked option with a free plan is GDB. The lowest first paid tier on this page is Xdebug at £16.67/mo.
26 debuggers ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
| # | Platform | Score | Why | From | Free plan | Paid from | Supported languages | |
|---|---|---|---|---|---|---|---|---|
| 1 |  Delve | 8.8 | RecognisedAPIDocumented | — | Yes | — | Go | View |
| 2 | GDB | 7.5 | RecognisedAPIDocumented | Free | Yes | — | Ada, Assembly, C, C++, D, Fortran, Go, Objective-C, OpenCL, Modula-2, Pascal, Rust | View |
| 3 |  LLDB | 7.5 | RecognisedAPIDocumented | Free | Yes | — | C, C++, Objective-C, Objective-C++ | View |
| 4 | Xdebug | 7.2 | RecognisedAPIDocumented | £16.67/mo | Yes | — | PHP | View |
| 5 | IDA Pro | 7.2 | RecognisedAPIDocumented | $91.58/mo | No | — | — | View |
| 6 |  RenderDoc | 6.7 | RecognisedAPIDocumented | — | Yes | — | HLSL, GLSL, SPIR-V | View |
| 7 |  FlowStorm | 6.6 | RecognisedAPIDocumented | Free | Yes | — | Clojure, ClojureScript | View |
| 8 | CUDA-GDB | 6.3 | RecognisedAPIDocumented | — | — | — | C/C++, Fortran | View |
| 9 |  UDB | 6.3 | RecognisedAPIDocumented | — | No | — | C, C++ | View |
| 10 | TRACE32 | 6.2 | RecognisedAPIDocumented | — | — | — | C, C++, Ada, ASM | View |
| 11 |  dnSpyEx | 6.2 | RecognisedAPIDocumented | — | Yes | — | C#, Visual Basic, IL | View |
| 12 |  SEGGER Ozone | 5.9 | RecognisedAPIDocumented | — | No | — | C, C++, Rust, Assembler | View |
| 13 |  UDE Universal Debug Engine | 5.9 | RecognisedAPIDocumented | — | — | — | C, C++, Assembly, Rust | View |
| 14 |  x64dbg | 5.9 | RecognisedAPIDocumented | — | Yes | — | — | View |
| 15 |  Ruby debug | 5.7 | RecognisedAPIDocumented | — | — | — | Ruby (MRI) 2.7 and later | View |
| 16 | Black Magic Debug | 5.7 | RecognisedAPIDocumented | — | Yes | — | — | View |
| 17 |  pyOCD | 5.7 | RecognisedAPIDocumented | — | Yes | — | — | View |
| 18 |  OpenOCD | 5.6 | RecognisedAPIDocumented | — | Yes | — | — | View |
| 19 |  rr | 5.5 | RecognisedAPIDocumented | — | — | — | C, C++, Go | View |
| 20 |  Perl Debugger | 5.5 | RecognisedAPIDocumented | — | Yes | — | Perl | View |
| 21 |  PonyDebugger | 5.4 | RecognisedAPIDocumented | — | Yes | — | Objective-C, Python | View |
| 22 |  FLEX | 5.4 | RecognisedAPIDocumented | — | Yes | — | Objective-C, Swift | View |
| 23 |  OllyDbg | 5.3 | RecognisedAPIDocumented | — | Yes | — | assembly | View |
| 24 | Erlang Debugger | 5.2 | RecognisedAPIDocumented | — | — | — | Erlang | View |
| 25 | unittest | 5.0 | RecognisedAPIDocumented | — | Yes | — | Python | View |
Is your platform on this list?
Numbered spots on this list can be sponsored. They are labelled, and the editorial order and scores never change for payment.
Questions about this list
Which debugger is ranked first on Inferse?
Delve is ranked #1 of 26 with a score of 8.8. GDB is second and LLDB third.
How many of these have a free plan?
4 of the 25 on this page publish a free plan on their own pricing pages.
Which is the cheapest paid option?
On this page, Xdebug has the lowest first paid tier we found: £16.67/mo.
How is this list ranked?
Ranked on what each maker publishes, open and connectable first: a public API, open-source code, the depth of its documentation and a free tier to try it on. Model lists are sorted by the figure in their title, exactly as each provider publishes it. Paid placements never change a rank.