Undo
Undo provides deterministic program recording technology that captures complete execution history of running applications, enabling time travel debugging and supplying AI coding agents with runtime context for automated root cause analysis across complex enterprise codebases in semiconductor, networking, and software sectors.
- Company typePrivate
- Founded2012
- HeadquartersCambridge, United Kingdom
- Headcount1–10
- GTM typeB2B
- OfferingSoftware
What Undo does
Undo Ltd. is a Cambridge, United Kingdom-based, privately held technology company founded in 2012 by Dr. Greg Law and Dr. Julian Smith. The company's core product is deterministic program recording technology: a just-in-time instrumentation engine that captures complete execution history of running software — every instruction, variable assignment, thread event, and system call — into portable recording files that can be replayed deterministically anywhere. This recording engine underlies two product lines: Undo for C/C++/Go/Rust and Undo for Java/Kotlin, each bundling the LiveRecorder capture component with the UDB time travel debugger (available as a VS Code, CLion, Eclipse, and Emacs plugin) and Thread Fuzzing capability for exposing concurrency bugs.
The commercial platform now extends beyond human-driven debugging into "runtime context for AI coding agents." Through an MCP (Model Context Protocol) server, Undo delivers execution recordings to AI coding agents including Claude Code, Cursor, Windsurf, GitHub Copilot, OpenAI Codex, and Google Gemini, enabling fully automated root cause analysis on complex codebases. The company claims this grounding raises AI agent bug-resolution rates from 38% to 92% on complex code and reduces mean time to root cause by up to 100x.
Undo sells primarily through enterprise direct sales with field engagement targeting engineering leaders, CTOs, and developer productivity teams. Pricing is quote-based: the Land and Prove Program provides a $50K six-month pilot entry point, with typical deployment investment ranging from $75K to $500K depending on team size, CI scale, and production debugging requirements, structured as multi-year subscriptions. The customer base spans enterprise engineering organizations across Semiconductor (NVIDIA, AMD, Mediatek, Synopsys, Cadence, Siemens EDA), Networking (Cisco, Juniper, HPE), Computational Software (SAP, Altair), Cloud (AWS), Security (Palo Alto Networks), Financial Services (Bloomberg, XR Trading), and Data Management (Actian). The company maintains a 99% gross retention rate and operates from Cambridge, UK and San Francisco, USA offices, having closed a $37 million growth investment round led by Elsewhere Partners in June 2026.
Undo firmographics
Firmographics- Name
- Undo
- Legal name
- Undo Ltd.
- Website
- https://undo.io
- Company type
- Private
- Founded year
- 2012
- Operating status
- Operating
- Headcount range
- 1–10 employees
- Short description
- Undo provides deterministic program recording technology that captures complete execution history of running applications, enabling time travel debugging and supplying AI coding agents with runtime context for automated root cause analysis across complex enterprise codebases in semiconductor, networking, and software sectors.
- Ownership category
- akta.pro rank
Undo industry classification
Industry- Product category
- Developer Debugging Software
- SIC
- Services-Computer Integrated Systems Design (7373), Services-Computer Programming, Data Processing, Etc. (7370), Services-Computer Programming Services (7371)
- akta.pro primary industry
- Data Integration, ETL/ELT & Reverse ETL (BPAMAOAI)
- akta.pro secondary industry
- ERP Implementation & Systems Integration Services (BPAEAGAA)
Keywords
Where Undo is headquartered
LocationHeadquarters
- HQ city
- Cambridge
- HQ country
- United Kingdom
- HQ region
- Europe
Offices2 records
Markets served
Undo business model
Business model- GTM type
- B2B
- Offering type
- Software
- Cost components
- Personnel, Technology or R&D, Marketing or Sales, Operations
Revenue model
- Enterprise Software Licenses: Undo licenses its LiveRecorder platform and UDB debugger to enterprise teams. The licensing model includes floating shared licenses for UDB usage, CI/test environment integrations, and production deployments. Enterprise agreements may include volume licensing for multiple engineering groups and multi-team deployments.
- Enterprise Onboarding and Support: White-glove support with direct access to Undo engineers, concierge onboarding, expert debugging training, and professional services including integration and CI pipeline setup.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Subscription | Multi-year contract | Enterprise Team Package for development/CI use |
| Subscription | Multi-year contract | Enterprise OEM Package for production debugging |
| One time/ perpetual license | Annual | Land and Prove Program pilot |
| Subscription | Multi-year contract | Typical deployment investment |
| Subscription | Annual | Startup/Academic discount |
Go-to-market motion2 records
Distribution channels3 records
Marketing channels7 records
Undo product offering
Product offeringCore offering
Undo provides deterministic program recording and time travel debugging software for complex Linux and Java/Kotlin codebases. Its platform records complete program execution into portable files that can be replayed forward and backward, and exposes this runtime context to AI coding agents (via MCP) for fully automated root cause analysis. The offering spans development/CI debugging and production failure capture for enterprise engineering teams.
Product overview
Undo offers a unified platform for AI-powered runtime context and time travel debugging across Linux and enterprise environments. The core portfolio consists of two language-specific products: Undo for C/C++/Go/Rust and Undo for Java/Kotlin. Both products share the underlying LiveRecorder recording engine and UDB debugger, with the C++ version supporting additional capabilities like Thread Fuzzing for concurrency bug detection. The platform is delivered via an MCP server enabling AI coding agents (Claude Code, Cursor, Windsurf, GitHub Copilot, Codex, Gemini) to query execution recordings for automated root cause analysis. Enterprise customers can choose between Team Package (for development/CI use) or OEM Package (for production debugging), with a structured Land and Prove Program for initial deployment.
Differentiator
Problem solved
Functional benefit
Brands
- LiveRecorder: Record and replay debugging tool for capturing application execution failures.
- UDB
- Undo Suite
- Undo AI
Products and services
- Undo for C/C++/Go/Rust
Quantifiable outcome
- 92% of complex bugs resolved by AI agents with runtime context vs 38% with static code analysis alone
- +5 more outcomes
Companies that use Undo
Customer profileNamed customers17 records
Segments6 records
Ideal customer profiles4 records
Undo technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- Yes
- API docs
- API detail
Core technology
AI maturity
App detail
Integration17 records
AI capability3 records
Feature6 records
Undo partnerships and signals
Strategic signalPartnerships
Six partnerships are on record, tiered core.
- Claude Code (Anthropic)coreUndo provides MCP server integration enabling Claude Code to query deterministic recordings for runtime context to perform automated root cause analysis on complex codebases.
- CursorcoreCursor IDE integrated with Undo's MCP server to provide AI coding agents with runtime context for debugging complex software.
- WindsurfcoreWindsurf AI coding assistant connected to Undo's MCP server for runtime context access during debugging workflows.
- GitHub CopilotcoreGitHub Copilot integrated via MCP to receive runtime context from Undo recordings, enabling more accurate debugging assistance.
- Codex (OpenAI)coreCodex agent connected to Undo's MCP server to access deterministic execution recordings for root cause analysis.
- Gemini (Google)coreGoogle Gemini AI coding assistant integrated via MCP to query Undo recordings for runtime context during debugging.
Scale indicators5 records
Recent moves6 records
Expansion highlights7 records
Undo competitors and assessment
Company assessmentDirect peers
- Rookout: Production debugging platform that lets developers set non-breaking breakpoints in live applications. Highly comparable to Undo's OEM Package — both target engineers who need to debug complex software without reproduction, and both sell into enterprise engineering organizations.
- Lightrun: Developer-native observability and live debugging platform that adds logs, metrics, and traces to running applications. Comparable to Undo in its enterprise engineering buyer, runtime debugging value prop, and IDE/CI integrations.
Broad incumbents
- Sentry: Application error monitoring and debugging platform serving millions of developers and thousands of enterprise teams. Overlaps with Undo in targeting software engineering teams for production bug resolution, but operates at much broader scale and a different layer (post-hoc error capture rather than deterministic execution recording).
- Honeycomb: Observability platform for production debugging of complex distributed systems. Comparable enterprise engineering buyer and root-cause-analysis value proposition, but focused on high-cardinality event data rather than deterministic execution recording.
- Datadog: Cloud observability and APM platform with broad monitoring, tracing, and debugging capabilities. Comparable enterprise buyer and root-cause-analysis positioning, but Undo's deterministic recording differentiates against Datadog's telemetry-based approach for complex multithreaded codebases.
- New Relic: Enterprise observability platform with APM, infrastructure monitoring, and log management. Comparable enterprise engineering buyer and incident-debugging workflow, but operates at a much broader portfolio level than Undo's focused time-travel-debugging niche.
- Dynatrace: Enterprise observability and application performance monitoring platform with AI-assisted root cause analysis. Comparable in targeting large enterprise engineering organizations and providing automated root-cause workflows, but with a much broader product surface and significantly larger scale.
Emerging players
- rr (Mozilla): Open-source record-and-replay debugger for Linux maintained by Mozilla. Most direct technical analog to Undo's LiveRecorder/UDB — Undo even publishes an 'Undo vs rr' comparison page. Differs in being open-source/community-driven rather than a commercial enterprise platform.
- Sourcegraph: Code intelligence platform that gives AI coding agents context across large codebases. Comparable to Undo in serving the AI-coding-agent context gap, but addresses static code context rather than runtime execution context — making the two complementary rather than substitutable in the AI debugging stack.
- Chronon: Feature platform for ML/AI applications providing data context for model training and serving. Thematically adjacent to Undo's runtime context positioning for AI systems, though focused on data/feature pipelines rather than program execution traces.
Market position
Strengths4 records
Weaknesses4 records
Competitive moat4 records
Key risks6 records
Key highlights6 records
Customer concentration
Undo social profiles
Digital presenceUndo financial estimates
Financial estimateRevenue estimate
Valuation estimate
Undo leadership team
Management profileNumber of profiles
Profiles9 records
Undo funding detail
Funding detailFunding overview
Funding rounds7 records
Investors7 records
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Undo M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Undo
What does Undo do?
Undo provides deterministic program recording and time travel debugging software for complex Linux and Java/Kotlin codebases. Its platform records complete program execution into portable files that can be replayed forward and backward, and exposes this runtime context to AI coding agents (via MCP) for fully automated root cause analysis. The offering spans development/CI debugging and production failure capture for enterprise engineering teams.
Is Undo a public or private company?
Undo is a private company. It is classified as venture growth investor backed and is currently operating.
When was Undo founded?
Undo was founded in 2012. It employs 1 to 10 people.
Where is Undo based?
Undo is headquartered in Cambridge, United Kingdom, in the Europe region.
How does Undo make money?
Two revenue lines are on record. Enterprise Software Licenses are the primary driver. The others are enterprise Onboarding and Support.
Who are Undo's main competitors?
Direct peers on record are Rookout and Lightrun. Broad incumbents are Sentry, Honeycomb, Datadog, New Relic and Dynatrace. Emerging players are rr (Mozilla), Sourcegraph and Chronon.
Does Undo have an API?
Yes. Undo delivers runtime context to AI coding agents via an MCP (Model Context Protocol) server. The MCP server enables any coding agent that supports MCP to query Undo recordings for exactly the context it needs about program execution. No special integration work is required. This allows AI agents to perform automated root cause analysis on complex codebases by accessing the deterministic execution recording. Developer documentation is at docs.undo.io.
What industry is Undo in?
Undo's product category is Developer Debugging Software. Its primary akta.pro industry code is BPAMAOAI, Data Integration, ETL/ELT & Reverse ETL, with a secondary code of BPAEAGAA, ERP Implementation & Systems Integration Services. Its SIC code is 7373.