DebugBear
DebugBear is a UK-based SaaS platform for website performance monitoring, focused on Google's Core Web Vitals. It offers synthetic and real user monitoring alongside free speed-testing tools, serving digital agencies, developers, marketers, ecommerce stores, and enterprises.
- Company typePrivate
- Founded2018
- HeadquartersFarnborough, United Kingdom
- Headcount1–10
- GTM typeB2B
- OfferingSoftware
What DebugBear does
DebugBear Ltd is a privately held, bootstrapped UK-based SaaS company founded in 2018 by Matt Zeunert that provides website performance monitoring focused on Google's Core Web Vitals. Its platform combines two core products — synthetic monitoring (scheduled lab tests with Lighthouse scoring and request waterfall analysis) and real user monitoring (RUM) that captures actual visitor experience data — supplemented by Google Chrome User Experience Report (CrUX) data monitoring. Differentiated features include INP element-level breakdown with screenshots, Long Animation Frames (LoAF) script attribution, LCP subpart decomposition, bundle size tracking, chart annotations for deployments, and AI agent prompts that translate test results into actionable instructions for Claude Code or Cursor. The company is SOC 2 Type II certified and has shipped free public tools — a website speed test, an INP debugger, and a Chrome extension — that double as top-of-funnel acquisition assets.
DebugBear firmographics
Firmographics- Name
- DebugBear
- Legal name
- DebugBear Ltd
- Website
- https://debugbear.com
- Company type
- Private
- Founded year
- 2018
- Operating status
- Operating
- Headcount range
- 1–10 employees
- Short description
- DebugBear is a UK-based SaaS platform for website performance monitoring, focused on Google's Core Web Vitals. It offers synthetic and real user monitoring alongside free speed-testing tools, serving digital agencies, developers, marketers, ecommerce stores, and enterprises.
- Ownership category
- akta.pro rank
DebugBear industry classification
Industry- Product category
- Web Performance Monitoring
- NAICS
- Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services (5182)
- SIC
- Services-Prepackaged Software (7372)
- akta.pro primary industry
- Digital Experience Monitoring (DEM: RUM/Synthetic) (HDABAJAH)
Keywords
Where DebugBear is headquartered
LocationHeadquarters
- HQ city
- Farnborough
- HQ country
- United Kingdom
- HQ region
- Europe
Offices2 records
Markets served
DebugBear business model
Business model- GTM type
- B2B
- Offering type
- Software
- Cost components
- Personnel, Technology or R&D, Infrastructure, Marketing or Sales, Operations
Revenue model
- SaaS Subscription - Core Web Vitals Monitoring: Subscription-based web performance monitoring platform with tiered pricing for synthetic monitoring, real user monitoring (RUM), and Google CrUX data. Revenue generated from recurring SaaS subscriptions with annual and monthly billing options. Land-and-expand through adding pages, users, and premium features.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Freemium | Monthly | Free Trial - No credit card required |
| Freemium | Pay-as-you-go | Free website scan and INP Debugger tools |
| Subscription | Annual | Paid subscription tiers (tiers not publicly disclosed) |
Go-to-market motion3 records
Distribution channels4 records
Marketing channels9 records
DebugBear product offering
Product offeringCore offering
DebugBear is a SaaS web performance monitoring platform that continuously measures, diagnoses, and tracks Core Web Vitals (INP, LCP, CLS, TTFB, FCP) for client websites. It combines scheduled Synthetic Lighthouse lab tests, Real-User Monitoring (RUM) of actual visitor experiences, and Google CrUX data ingestion in a single dashboard, with alerting, API access, video exports, and AI-agent fix prompts to help agencies, developers, and enterprises optimize page speed and SEO performance.
Product overview
DebugBear is a web performance monitoring platform offering Real-User Monitoring (RUM) and Synthetic Monitoring as its two core products. The platform integrates Google CrUX data monitoring and provides various free tools including an INP Debugger, Website Speed Test, and Site Speed Chrome Extension. Key features include request waterfall visualization, warm load testing, bundle size monitoring, and AI agent prompts for optimization. The products work together to help startups, agencies, and enterprises keep websites fast by tracking Core Web Vitals, identifying performance bottlenecks, and providing actionable recommendations. The platform has been operating since 2018 and has generated tens of millions of page speed reports.
Differentiator
Problem solved
Functional benefit
Products and services
- Real-User Monitoring (RUM) Tracks actual visitor experience across a website in real time, providing Core Web Vitals metrics (INP, LCP, CLS, TTFB, FCP), INP element-level breakdown, script attribution, and per-page view analysis. Aimed at website operators and agencies that need to measure field performance rather than synthetic results.
- Synthetic Monitoring Runs scheduled lab tests of a website and tracks Google Lighthouse scores, with detailed technical reporting and performance recommendations. Aimed at developers, agencies, and enterprises that need continuous lab-based performance monitoring with alerting.
- Google CrUX Monitoring Monitors visitor performance data from Google's Chrome User Experience Report (CrUX) for industry benchmarking and tracking CrUX-based Core Web Vitals scores over time. Aimed at teams that need field data and competitive benchmarking without instrumenting their own RUM collection.
- INP Debugger Free public tool that automatically identifies clickable page elements on a website, simulates interactions, and reports which interactions are slow. Aimed at individual developers and website owners who want to diagnose INP issues without signing up for the platform.
- Website Speed Test Free public website speed testing tool that delivers a Core Web Vitals assessment, request waterfall visualization, and Lighthouse scores for any URL without requiring signup. Aimed at individual website owners, developers, and prospects evaluating the platform.
- Site Speed Chrome Extension Chrome browser extension that displays Core Web Vitals and INP metrics for the website currently being viewed. Aimed at developers and website operators who want on-demand performance insight while browsing.
Quantifiable outcome
- CoinStats updated 15,000 pages and saw 'Good URLs' and impressions increase 3x after implementing Core Web Vitals optimizations guided by DebugBear
- +3 more outcomes
Companies that use DebugBear
Customer profileNamed customers7 records
Segments6 records
Ideal customer profiles3 records
DebugBear technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- Yes
- API docs
- API detail
Core technology
AI maturity
App detail
Integration2 records
Feature10 records
DebugBear partnerships and signals
Strategic signalPartnerships
Ten partnerships are on record, tiered minor.
- Iron/OutminorNetherlands-based web performance consulting agency. Helps businesses deliver better digital experiences through performance audits, implementation plans, and proactive performance monitoring systems. Works with DebugBear as a recommended partner.
- Joshua Clare-FlaggminorUK-based independent web performance consultant offering Core Web Vitals audits with actionable reports and prioritized implementation roadmaps. Can also implement recommendations directly.
- DOS atelierminorPortugal-based digital agency focused on creating fast, reliable websites and improving performance of existing sites. Works with clients to optimize website speed and user experience.
- Perf ReviewsminorSpain-based website performance analysis firm providing detailed performance reports and ongoing support to tackle Core Web Vitals issues alongside client teams.
- BoostBuddyminorSlovenia-based optimization agency specializing in WordPress, Webflow, and Shopify websites. Focused specifically on passing Core Web Vitals assessments.
- SiteCareminorUS-based WordPress performance optimization partner offering ongoing, iterative improvements to keep WordPress sites running fast, reliable, and optimized for every user on a monthly retainer basis.
- Aymeric BouillatminorFrance-based independent web performance consultant focused on cache optimization and Core Web Vitals. Uses pragmatic approach prioritizing actions by impact and feasibility balance.
- Space DinosaursminorFull-service digital agency with 10+ years helping companies grow revenue through website performance optimization, user experience improvements, and conversion rate optimization for retail websites.
- Aaron T. GroggminorIndependent web performance specialist with nearly 30 years of experience across diverse organizations including nonprofits, small businesses, boutique agencies, and multinational conglomerates.
- HallwayminorUK-based Shopify agency using evidence-led optimization with senior-only delivery. Uses DebugBear to pinpoint performance bottlenecks and turn insights into measurable Core Web Vitals and conversion improvements. Shopify partners since 2013.
Scale indicators3 records
Recent moves6 records
Expansion highlights5 records
DebugBear competitors and assessment
Company assessmentDirect peers
- Treo: Treo is a Core Web Vitals monitoring SaaS providing site audit, synthetic testing, and competitor benchmarking with a focus on SEO teams and agencies. It overlaps directly with DebugBear's SEO-and-marketing segment and competes for the same organic acquisition keywords.
- Catchpoint: Catchpoint is an enterprise observability platform offering synthetic monitoring, RUM, and WebPageTest-style infrastructure testing. It is a direct peer in the synthetic + RUM monitoring space but at a larger enterprise scale, often competing with DebugBear for larger accounts.
- SpeedCurve: SpeedCurve is a SaaS platform for synthetic and real user web performance monitoring with a strong focus on Core Web Vitals, design metrics, and competitive benchmarking. It is the most direct competitor to DebugBear, serving the same developer, agency, and marketing personas with comparable synthetic + RUM dashboards.
- Calibre: Calibre is a Core Web Vitals and page speed monitoring SaaS that combines synthetic testing, RUM, and Lighthouse audits with team collaboration features. It targets developers, agencies, and product teams with a similar feature set to DebugBear, including budget enforcement and performance regression alerts.
- GTmetrix: GTmetrix is a website speed testing and monitoring service built on Lighthouse that offers scheduled tests, performance scoring, and alerting. It overlaps with DebugBear's synthetic monitoring product and free speed test positioning for SMB and developer users.
Broad incumbents
- Cloudflare Web Analytics: Cloudflare provides free Web Analytics with Core Web Vitals for any site on its network, plus paid RUM and observability features bundled with its CDN/edge platform. It is a broad incumbent whose free offering directly pressures DebugBear's free tool funnel.
- New Relic: New Relic is a broad observability platform with browser monitoring that captures Core Web Vitals and front-end performance data. As a broad incumbent, it competes for enterprise monitoring budgets that might otherwise be allocated to a specialist like DebugBear.
- Datadog: Datadog is a broad cloud observability platform whose Real User Monitoring (RUM) product includes Core Web Vitals and front-end performance metrics. It is a broad incumbent that bundles web performance into a wider APM/security portfolio, competing with DebugBear at the enterprise tier.
- Akamai mPulse: Akamai mPulse is a real user monitoring solution integrated with Akamai's CDN and edge security portfolio. It competes at the enterprise tier where Akamai's CDN footprint gives it structural advantages in serving large media and ecommerce customers similar to The Independent.
Emerging players
- Sentry: Sentry is a developer-first application monitoring platform that has expanded into front-end performance and Web Vitals tracking alongside its core error monitoring product. It overlaps with DebugBear on developer-oriented web performance instrumentation, particularly for engineering teams.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat5 records
Key risks6 records
Key highlights7 records
Customer concentration
DebugBear social profiles
Digital presenceDebugBear compliance and trust
Trust signalCompliance1 record
DebugBear financial estimates
Financial estimateRevenue estimate
Valuation estimate
DebugBear leadership team
Management profileNumber of profiles
Profiles5 records
DebugBear funding detail
Funding detailFunding overview
Funding rounds1 record
Investors1 record
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
DebugBear 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 DebugBear
What does DebugBear do?
DebugBear is a SaaS web performance monitoring platform that continuously measures, diagnoses, and tracks Core Web Vitals (INP, LCP, CLS, TTFB, FCP) for client websites. It combines scheduled Synthetic Lighthouse lab tests, Real-User Monitoring (RUM) of actual visitor experiences, and Google CrUX data ingestion in a single dashboard, with alerting, API access, video exports, and AI-agent fix prompts to help agencies, developers, and enterprises optimize page speed and SEO performance.
Is DebugBear a public or private company?
DebugBear is a private company. It is classified as founder individual operated bootstrapped and is currently operating.
When was DebugBear founded?
DebugBear was founded in 2018. It employs 1 to 10 people.
Where is DebugBear based?
DebugBear is headquartered in Farnborough, United Kingdom, in the Europe region.
How does DebugBear make money?
One revenue line is on record: saaS Subscription - Core Web Vitals Monitoring.
Who are DebugBear's main competitors?
Direct peers on record are Treo, Catchpoint, SpeedCurve, Calibre and GTmetrix. Broad incumbents are Cloudflare Web Analytics, New Relic, Datadog and Akamai mPulse. Sentry is listed as an emerging player.
Does DebugBear have an API?
Yes. DebugBear's API allows developers to trigger synthetic tests, access real user monitoring data, and receive webhook alerts when tests finish. The API documentation is available at /docs/api. Developer documentation is at www.debugbear.com/docs/api.
What industry is DebugBear in?
DebugBear's product category is Web Performance Monitoring. Its primary akta.pro industry code is HDABAJAH, Digital Experience Monitoring (DEM: RUM/Synthetic). Its NAICS code is 5182 and its SIC code is 7372.