Deepcrawl is now Lumar. Read more.

Ultimate speed. Maximum flexibility.
The #1 website crawler.

  • The fastest crawler on the market — crawl speeds up to 450 URLs/second (non-rendered) & 350 URLs/second (rendered)
  • Consistently upgraded and enhanced with new releases
  • Close alignment with the latest Google crawling behaviors

Crawler quality matters.

Crawling software is a foundational aspect of SEO and website intelligence platforms — like Lumar’s Analyze, Monitor, and Protect. Website crawlers traverse a website’s pages to collate the raw data required for sophisticated website analytics and serve as the first step in understanding and optimizing a website’s technical health and organic search performance.

Our crawler is the cornerstone of Lumar’s website intelligence and technical SEO platform — and it’s consistently upgraded and enhanced with new releases to ensure fast, accurate, scalable crawls, and alignment with the latest search engine developments.

Super-fast crawling Lumar
Ultra-Fast Website Crawling

Built for speed. Lumar’s site crawler leverages best-in-class serverless architecture design to drastically enhance website crawling speeds (as fast as your infrastructure allows).

For enterprise websites housing hundreds of thousands (or millions) of pages, Deepcrawl’s ultra-fast crawling provides a major, time-saving boon for SEO, digital marketing, and developer teams, who previously could have waited days for a full website crawl to complete. Our latest crawler release allows for crawl speeds of up to 450 pages per second (and 350 pages per second for rendered content)—that’s very fast!

Flexible & customizable website crawls

Get the exact data you need. Our crawler offers extensive flexibility in data collection. The information that can be captured in Lumar crawls expands beyond traditional technical SEO metrics, paving the way for new built-in metrics and reporting options within the Lumar platform.

Users have access to 250 built-in reports in Lumar Analyze , 200+ automated tests in Protect, and the ability to design countless custom extractions to collect data on just about any aspect of your website you can imagine. This flexibility allows for new use cases to be developed via Lumar’s crawler, with our recently released GraphQL API providing easy implementation for developers.

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What makes Lumar’s crawler the best on the market?

Constantly improving

Lumar’s engineers and product team are always at work behind the scenes to ensure our crawler and our full platform offering are up-to-date with the latest search engine developments.

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Improved rendering & parsing

Accurately identify rendering issues that may impact search performance. Our crawler takes full advantage of Google’s industry-leading rendering and parsing engine to ensure JavaScript-rendered pages are viewed in line with search engines’ own capabilities and users can accurately identify rendering issues that may impact their search performance.

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Close alignment with the latest Google Search behaviors

Lumar’s crawling technology is built to align with Google’s own search engine crawling behaviors. We regularly release new versions of our crawler to Deepcrawl users, helping to ensure website teams get an accurate, up-to-date picture of how search engines view their domains.

How Lumar users uncover their websites’ full potential


  • Fandom

    “Lumar Monitor has literally saved us hours a week. Instead of going to each site one by one and asking if work has been completed, I can quickly see if anything has been done and see the results and progress since then. It’s been a huge time saver and helped us see at a glance who’s been doing what. It’s been a huge, huge help.”

    Joshua Taylor Titsworth, Senior Analyst, Fandom.com

  • Arriva Dark
    arriva uk customer testimonial review for Lumar website intelligence platform

    “Lumar is a change enablement tool that’s helped us drive a +50% increase in digital conversion and +10% increase in search engine visibility”

    Dave Cain, Head of Digital Marketing, Arriva

  • client testimonial for lumar's tech seo saas platform - cox auto

    “The extra insights we get from our calls with Lumar have been really valuable. The support we get really is like having an extension of our internal team.”

    Chris Nichols, Senior Manager, Enterprise SEO & Product Management

  • Arriva
    arriva uk customer testimonial review for Lumar website intelligence platform

    “Lumar has saved us an enormous amount of time. So much so, we estimate without the tool, and to cover the vast array of SEO analytics and insights highlighted within Lumar, we would have needed to employ another full-time member of staff within our digital team.”

    Dave Cain, Head of Digital Marketing, Arriva UK Bus

  • Catenamedia
    lumar customer review for technical seo analytics tool

    “Lumar is fundamental when it comes to technical audits, as the tool carries out an in-depth analysis of each one of our brands. It provides insightful data that helps to shape our decisions. I love how easy it is to connect Lumar with Google Analytics, Google Search Console, and Majestic data for each of our brands. Lumar congregates all that data and makes my life a lot easier. Definitely valuable in helping us to identify the highest priority issues in a data set.”

    David McAdam, Technical SEO Strategist

  • Cox automotive

    “Lumar is obviously top-of-the-line, with a lot of cutting-edge aspects to the technology. But it was also really important for us to find someone that would be a partner for us. The extra services are a big part of why we chose Lumar.”

    Matthew Grabiak, Principal SEO Product Manager

  • Fandom

    “Lumar Monitor is everything any agency or enterprise-level company needs to quickly track and look at updates, recommendations, trends, and issues. If you have hundreds of sites, it’s a way to look at things at-a-glance and know exactly what’s going on — and what issues you need to be paying attention to.”

    Joshua Taylor Titsworth, Senior Analyst, Fandom.com

  • Heine
    lumar customer review testimonial for technical seo platform

    “Lumar Protect is a very reliable tool. We used Protect, for example, to check if anything is redirecting where it shouldn’t be. Before, I had to check everything manually but, with Lumar, you can set up tests beforehand and really see what happens. It’s a great relief to know there is something that will notify me if anything has changed.”

    Sebastian Simon, Senior SEO Manager, heine

Lumar is the website intelligence platform of choice for leading enterprise brands

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Our team is your team. Collaborate with our experts.

  • associate tech seo at lumar - emily
    Emily Whalen Associate Technical SEO
  • senior technical SEO at lumar - james
    James Leisy Senior Technical SEO
  • senior technical seo at lumar - jamie indigo
    Jamie Indigo Senior Technical SEO
  • senior tech seo at lumar - michelle
    Michelle Race Senior Technical SEO
  • natalie stubbs - senior tech seo at lumar
    Natalie Stubbs Senior Technical SEO
  • Chris Steele
    Chris Steele Senior Technical SEO
  • Ashley Berman Hale VP, Professional Services
  • senior technical seo expert at Lumar - Anne Berlin
    Anne Berlin Senior Technical SEO
  • technical seo at lumar - brad
    Brad Passarelli Technical SEO
  • senior tech seo expert at lumar - chris spann
    Chris Spann Senior Technical SEO

Start building better online experiences today

Lumar is the intelligence & automation platform behind revenue-driving websites.