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PerfDelta VS DebugBear

Compare PerfDelta VS DebugBear and see what are their differences

PerfDelta

Website speed test with Core Web Vitals competitor benchmarks

Rating
0 reviews
Pricing
Freemium $29 / Monthly (Solo, 25 monitored URLs, net plus VAT)
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Alternatives Is it good?
DebugBear

Track site speed and Core Web Vitals

Rating
0 reviews
Pricing
Paid Free trial $125 / Monthly
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Alternatives Is it good?
Netumo
Ensure healthy website performance, uptime, and free from vulnerabilities. Automatic checks for SSL Certificates, domains and monitor issues with your websites all from one console and get instant notifications on any issues. sponsored

Which is more popular?

Website Speed popularity
100% vs 0%
alternatives listed
8 vs 163

Base details

Website, pricing, platforms and company facts side by side.

PerfDelta
DebugBear
Website perfdelta.com debugbear.com
Pricing
Freemium $29 / Monthly (Solo, 25 monitored URLs, net plus VAT) Official pricing
Paid Free trial $125 / Monthly Official pricing
Platforms
Web REST API MCP
—
Company Startup from Germany · 1 - 9 employees —
Listed in
Website Speed Website Monitoring Website Performance Monitoring SEO Tools +1
Website Monitoring Performance Monitoring SEO Monitoring SEO Tools SEO Auditing SEO Performance Monitoring SEO +4

About PerfDelta and DebugBear

In their own words, as submitted to SaaSHub.

PerfDelta
DebugBear

PerfDelta is a website speed test and Core Web Vitals monitoring tool built around comparison. Google PageSpeed Insights tests one URL and returns one score. PerfDelta tests several pages of a site, places the results next to competitors and a benchmark of every domain tested so far, and stores...

Read more about PerfDelta

Monitor the performance of your website and benchmark against the competition. Get alerted in Slack or by email when there's a problem. Continuously test the speed of your website in a controlled lab environment and get in-depth reports to optimize your site. DebugBear is built on top of...

Read more about DebugBear

Features and specs

What each product offers, as listed by its team.

PerfDelta 10 features
DebugBear 5 features
  • Competitor benchmarking
    Competitor comparison with up to two domains and delta badges per metric
  • Real-user data (CrUX)
    Real-user field data from the Chrome UX Report (LCP, INP, CLS, FCP, TTFB)
  • Lighthouse lab data
    Lighthouse lab metrics per page, worst first
  • Multi-page scan
    Three pages per run on mobile and desktop, from the sitemap or chosen manually
  • AI recommendations
    AI fix recommendations tailored to the detected tech stack
  • Tech stack detection
    CMS, framework, server, CDN
  • Monitoring
    Monitoring of 25 to 500 URLs daily or weekly, every 6 hours from Agency
  • MCP server
    MCP server and REST API in all paid plans (free account: one scan every 24 hours)
  • Agent briefs
    Markdown work orders for coding agents such as Claude Code or Cursor, with prioritized fixes, stable IDs, affected files and acceptance criteria
  • Performance budgets
    Performance budgets per project and URL: status in the report, a warning before the limit, an email when one is crossed, CI check via MCP
  • Performance Monitoring
    DebugBear offers extensive performance monitoring capabilities, allowing developers to track and enhance website speed and performance metrics over time.
  • Core Web Vitals
    The tool provides detailed insights into Google's Core Web Vitals, helping to optimize user experience by adhering to industry standards.
  • Automated Testing
    Automated testing features in DebugBear facilitate regular site checks without manual intervention, ensuring that performance standards are consistently met.
  • Collaboration Tools
    DebugBear includes collaboration tools that enable team members to share insights, reports, and progress, fostering a collaborative environment for performance optimization.
  • Historical Data
    It provides historical data tracking, allowing users to understand long-term performance trends and the impact of changes over time.

Possible disadvantages

  • Cost
    DebugBear can be relatively expensive for small businesses or individual developers, potentially making it less accessible for those with limited budgets.
  • Complexity
    The extensive features and detailed data can be overwhelming for users without a technical background, potentially increasing the learning curve.
  • Integration Limitations
    There may be some limitations in integrating DebugBear with certain other third-party tools or platforms that development teams use, which can affect workflow efficiency.
  • Limited Customization
    Some users may find that the level of customization available in the tool is not as high as they would like for certain specific use cases or reporting formats.

Videos

Walkthroughs and reviews on video.

PerfDelta 1 video + Add
DebugBear 0 videos + Add

Website Speed Test: Is Your Site Slower Than Your Competitors?

No DebugBear videos yet. You could help us improve this page by suggesting one.

Category popularity

How often each product is chosen within a category, 0–100% relative to the other.

Score bands 0–20 21–40 41–50 51–60 61–100
PerfDelta
DebugBear
100% 100%
Website Speed
0% 0%
6% 6%
Website Monitoring
94% 94%
8% 8%
SEO Tools
92% 92%
10% 10%
Website Performance Monitoring
90% 90%

Questions & Answers

As answered by people managing PerfDelta and DebugBear.

What makes your product unique?

PerfDelta's answer

PageSpeed Insights tests one URL and shows one score. PerfDelta tests three pages per run, puts the results next to up to two competitors and a benchmark of every domain tested so far, and keeps the history of every measurement.

Why should a person choose your product over its competitors?

PerfDelta's answer

The free speed test that shows whether your Core Web Vitals beat your competitors'. It uses the same Google data sources as PageSpeed Insights, plus several pages per run, competitor comparison, a cross-domain benchmark, stored history and monitoring. Compared with GTmetrix, real-user CrUX field data is shown before lab data, and a competitor comparison is included in the free test.

How would you describe the primary audience of your product?

PerfDelta's answer

SEO agencies and freelancers who report Core Web Vitals to clients and need a competitor view. In-house SEO and web teams at e-commerce, SaaS and publishing companies who watch key templates after releases. Technical SEO consultants who need field data, lab data, affected files and tech stack in one report. Developers who run scans from AI agents via MCP or from their own tools via REST.

What's the story behind your product?

PerfDelta's answer

PerfDelta was built because PageSpeed Insights tells you how fast your site is, but not whether you're faster than the sites you compete with. Founder Christian Schreiber has worked on SEO and web performance for more than 15 years and launched PerfDelta in Berlin in 2026.

Which are the primary technologies used for building your product?

PerfDelta's answer

  • Plain PHP, no framework
  • Google PageSpeed Insights API (Lighthouse lab data)
  • Chrome UX Report (field data at the 75th percentile)
  • Mistral AI language model for optimization notes
  • MCP server (Streamable HTTP) and REST API
  • Paddle as merchant of record

User comments

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Alternatives to PerfDelta and DebugBear

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