Deepcrawl is now Lumar. Read more.
DeepcrawlはLumarになりました。 詳細はこちら

Site Speed Metrics

Improve website performance and reduce costs, with truly actionable insights to identify and prioritize site speed issues at scale.

Graphical representation of Lumar's Site Speed Metrics

The speed of your site has a significant impact on its success. With Google confirming page experience as a ranking factor, and slower pages causing visitors to switch to competitors, it directly impacts conversion and bounce rates, and ultimately revenue. Add to this that slow sites likely have higher content and resource storage costs, and it’s clear that the speed of your site can seriously impact your bottom line. 

Lumar gives you not only full Lighthouse performance reporting at scale, but critically the details you need to understand the issues and take action, while improving collaboration across web development teams. All of which helps drive a high-performing, revenue-driving site that delivers a great experience. 

Super-fast website crawling with Lumar's crawler - crawl speeds up to 450 URLs per second
Get fast, actionable insights

Lumar’s ultra-fast, ultra-scalable, and ultra-flexible crawler provides Lighthouse reporting at scale, allowing you to identify site speed issues across your site, fast. Our flexible project approach also allows you to run ad-hoc, targeted crawls as required, so you can get the insights you need, when you need them.

Get truly actionable data

Lumar health scores and high-level dashboard overviews show you where to focus your attention. Drill down into granular details to find the exact issues that need addressing, get clear explanations of how to resolve issues, and details of potential time and byte savings.

Graphic representing Lumar's Site Speed Health Scores, showing an overall health score, and scores for FCP, LCP and TBT with trend lines
Graphic representing Lumar's Site Speed Top Changes, showing Slow Server Response Time decreasing by 2%, Legacy Javascript decreasing by 1% and Test Compression Issues down by 1%. The graphic also shows trend lines for each report.
Prioritize effectively

Aggregated site speed issues help identify the biggest opportunities, and understand potential time and byte savings across your site. Sort, filter, and segment issues to focus in on the issues that will have the greatest impact.

Collaborate effectively

Get the information you need to write clear acceptance criteria for dev tickets, eliminating back and forth and ensuring issues are resolved quickly.

Graphical representation of Analyze top issues for Total Blocking Time, showing three metrics and a trend line showing improvement over time.
Lumar Protect - Automated SEO QA testing
Streamline processes

Improve collaboration across web teams to streamline processes, reduce time to rectify issues, and avoid preventable errors being introduced to your site.

Graphical representation of Lumar Analyze.
Lumar Analyze

Identify, prioritize and fix issues fast with logically organized reports, health scores, charts and dashboards to give you all the insights you need to boost website performance. Explore Lumar Analyze.

Graphical representation of Lumar Monitor.
Lumar Monitor

Mitigate the risk of lost traffic or revenue with customizable dashboards and alerts across all your domains, geographies or important site sections—in one place. Explore Lumar Monitor.

Graphical representation of Lumar Protect for automated QA testing
Lumar Protect

Save time and money by identifying and fixing issues before they hit your live site, with regular template testing on staging or dev sites, or fully automated QA testing. Explore Lumar Protect.

How Lumar users uncover their websites’ full potential


  • Photo of Arturs Cavniss, Technical SEO Lead at Bensons for Beds.
    Bensons for Beds Logo

    “Lumar’s a huge time saver and really easy to use. I can see all issues in one place, know where to focus as everything’s broken down in a super logical way, and easily stay on top of progress with in-built tasks. Plus, the alerts catch any major issues before they lose us traffic or revenue. If you’re looking to boost your site’s technical health, Lumar and its amazing team have got your back.”

    Arturs Cavniss, Technical SEO Lead

  • Met Office Logo

    Lumar’s accessibility metrics have been a game changer. With its user-friendly design and comprehensive classification and description of issues, it has allowed us to quickly take action to improve our website’s accessibility and overall health, and it has been rewarding to watch our health scores steadily improve on the platform as a result.

    Heather Bidwell, SEO Manager

  • Fandom
    Fandom logo

    “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

  • Lumar heart

    “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.”

    Senior SEO Manager, European Fashion Retailer

  • Fandom
    Fandom logo

    “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

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

customer logo customer logo twitch news media publisher customer logo motley fool saas customer logo canva

Start building better online experiences today

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