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About CometWeb

I build CometWeb on my own, so an audit ends in a fix.

I’m Maciej Zmitrukiewicz. I build CometWeb Insight, an app that checks a website’s performance, SEO, accessibility, security and estimated carbon footprint, then turns the results into a task list. I also publish open-source projects.

Check your website with Insight Write to me

CometWeb is a brand run by one person. I read every message sent to hello@cometweb.io myself.

The story

From building websites to a tool that helps people improve them.

Insight grew out of a question that came back with every site: what in this report should be fixed first, and how do you check that the fix worked.

The start

The idea came from working on websites.

The idea for CometWeb took shape during inQUBE Academy. That’s where I moved from web services to building my own SaaS product. Today, that product is CometWeb Insight.

  • Websites and apps for clients since 2018
  • inQUBE Academy and a change of direction
  • CometWeb Insight as my own product
How CometWeb started at inQUBE Academy, wroclaw.pl (Polish)
The focus

The audit is where the work starts.

Performance, SEO and accessibility results still need interpreting before anyone can act on them. Insight turns them into issues, priorities and tasks for the person making the fix.

  • Issues from five areas in one list
  • A priority on every issue
  • A task for the person shipping the fix

An automated audit helps find issues. Manual accessibility review and penetration testing stay with specialists.

After shipping

A result should be something you can check.

Once changes are live, you run the analysis again. A re-test of the same scope shows what changed and what still needs attention.

  • A re-test of the same scope
  • The status of every task after changes
  • A report you can share with a link

Comparisons and result history are on paid plans.

What I’m building

Insight sits at the centre of CometWeb.

I’m building it for agencies, freelancers and teams responsible for websites. The browser extension and the MCP server work with the same results.

Open source

Five projects with open code.

I publish them in the CometWeb-io organisation on GitHub. Each has its own repository, licence and a description of its limits.

All open-source projects CometWeb-io on GitHub
Principles

Results you can trust.

Four things I hold to, in the product and on this site.

  • Measure, fix, re-test

    An audit ends in a task list, and a fix ends in a re-test of the same scope.

    See the Insight demo

  • An explained method

    I document data sources and how scores are calculated. Lab measurements, real-user data and estimates each serve a different purpose.

    Read the methodology

  • Clear limits

    Insight points to issues worth checking. WCAG certification, penetration tests and ranking guarantees stay with specialists, and CO₂e is reported as an estimate.

    See what Insight checks

  • My own site first

    I test each method on cometweb.io first and publish the result even when it makes me look bad. In the September benchmark my page lost on LCP to the fastest page in the comparison, 5.8 s to 2.2 s.

    Read the benchmark
Contact

You write directly to the founder.

Write
hello@cometweb.io

A question about a result, an idea for a feature or a conversation about working together. I reply in person, in English or Polish.

Contact form
What CometWeb is
  • CometWeb is a brand and a product name.
  • One person runs it, with no registered company behind it.
  • The open-source projects use the MIT or Apache-2.0 licence.

See what Insight finds on your website.

Create an account or tell me what you’re working on. I can help you work out whether Insight fits your needs.

Get started with Insight Let’s talk
  1. Create an accountFree plan, no card.
  2. Check a siteA public URL is enough.
  3. Write to meI reply in person.