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UDB

Paid#10 of 27 in Debuggers

UDB: A Linux C/C++ debugger built around recorded forward and reverse execution. Ranked #10 of 27 in Debuggers by our editors (8.0/10); pricing: Pricing on request; best for linux C/C++ reverse debugging.

8.0/10Editor score

Visit Undo

UDB8.0 Visit Undo

At a glance

Editor score
8.0 / 10
Pricing
Pricing on request
Best for
Linux C/C++ reverse debugging
Free plan
No
Supported languages
C, C++
Facts checked
20 Sep 2026

Where it wins
- Replays recorded execution forward or backward
- Supports core dumps, remote debugging, and GDB compatibility
- Integrates with VS Code, CLion, Eclipse, and Emacs
Where it doesn't
- Supports Linux rather than multiple operating systems
- No general free plan for ongoing use
- Enterprise package pricing requires contacting sales

Our verdict on UDB

UDB is an interactive debugger for developers working with Linux C and C++ applications. Its central capability is recorded program history: developers can replay execution forward or backward while inspecting variables and memory. It also supports conditional breakpoints, watchpoints, exception breakpoints, attaching to running processes, core-dump loading, and remote debugging through udbserver. This makes it suited to investigating race conditions, deadlocks, memory corruption, segmentation faults, and stack corruption.

The feature depth is concentrated in time-travel debugging. Recorded execution lets developers revisit earlier program states instead of relying only on forward stepping, while GDB compatibility supports established debugging workflows. The explain command adds AI-assisted debugging, and integrations for Visual Studio Code, CLion, Eclipse, and Emacs provide options across several development environments. The Enterprise Team Package adds CI recording generation, unlimited UDB time-travel debugging sessions, thread fuzzing, AI coding-agent integration, and white-glove support. The Enterprise OEM Package adds production debugging, portable recordings for replay, remote debugging options, and white-glove support.

UDB is a focused choice for teams diagnosing difficult C/C++ failures on Linux, particularly when reverse execution, core dumps, remote sessions, or CI recordings are important. The Land and Prove Program includes six months of unlimited development access to the full Undo Suite, unlimited recordings, CI and test-suite integration, enterprise support, and concierge onboarding and training. Teams with production debugging or OEM requirements can choose the corresponding enterprise package. Developers needing a debugger for other operating systems, languages beyond C and C++, or a general free plan should consider an alternative with broader platform coverage or a different access model.

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

UDB pricing

Plans Pricing on requestPaid No free plan — trial or paid only. Prices checked 20 Sep 2026.

See plans on undo.io

All 3 UDB plans and prices →

UDB fact sheet

Free plan	No
Paid from	Not verified
Supported languages	C, C++
Target platforms	Linux
Remote debugging	Yes
Conditional breakpoints	Yes
Exception breakpoints	Yes
Time-travel debugging	Yes
Core dump debugging	Yes
Deployment	Self-hosted
Platforms	Linux
Support	Email, Community, Docs
Built for	Solo, Small business, Mid-market, Enterprise (editorial estimate)
Integrations	4 integrations: Visual Studio Code, CLion, Eclipse, Emacs See all →
Pricing	Pricing on request (source)
Website	undo.io
Facts checked	20 Sep 2026

UDB integrations

UDB lists 4 integrations on its own site.

Visual Studio Code
CLion
Eclipse
Emacs

See all UDB integrations →

Alternatives to UDB

See all UDB alternatives →

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The editor score above is our own research. What this page doesn't have yet is a reader's view — what you used UDB for, what worked and what didn't. No stars are seeded and no review is paid for; an editor reads every one before it appears.

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Featured on iTechGuides

UDB is listed in our Debuggers 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

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Last updated 7 Oct 2026 · How we research and update