Screaming Frog vs Sitebulb vs Semrush vs Visaro

You're on a client call and the latest technical SEO audit looks better than the last one. Your developer released a template fix on Thursday. Then the client asks, "Does that mean all the service pages are fixed?" The report shows fewer issues, but it doesn't say which pages were checked. Your SEO has the crawl open, the developer has the release ticket, and you're trying to answer a reasonable question without making a promise you can't back up.

Now think about the same agency preparing for a site migration. Nobody is asking for a client portal that morning. The SEO needs to compare staging and live pages and find out whether a new template has dropped something important. The right tool for that investigation might not be the one you'd choose to manage the following six months of client work.

Screaming Frog SEO Spider, Sitebulb, Semrush Site Audit and Visaro Website Audit cover much of the same ground: broken links, redirects and issues that can keep pages out of search. We've compared all four to see where each has the edge, whether you need a tool for the job in front of you or for the audits your team runs week after week. Let's start with what each tool does best and who it's likely to suit.

 

Where Each Product Fits

Feature Comparison

The same feature name can mean different things. JavaScript rendering may come built into the crawler, depend on the plan or need a separate renderer. Custom extraction varies in which page elements you can collect and how you can select them. Here's how the four tools compare on the main audit features.

How Much Control Do You Have Over the Crawl?

Take the same group of service pages. If some are absent from the navigation, a crawl that follows links from the homepage might miss them. Screaming Frog and Sitebulb can both work from a supplied URL list. Semrush can also take a list, or scope Site Audit to the relevant section of the site. Visaro Website Audit discovers pages from links and sitemaps within the approved scope and reports on crawl coverage and exclusions. The question for each is the same: did it reach the pages you actually need to check? A larger crawl doesn't help if the key pages aren't in it.

The difference is more pronounced if the service-page template adds or changes a directive in JavaScript. The licensed Screaming Frog Spider includes Chromium rendering and can store the original and rendered HTML. Sitebulb's Chrome Crawler puts changes to elements such as meta robots, canonicals and links into its Response vs Render report. Semrush offers rendering on Guru and Business SEO Toolkit plans. Visaro can inspect rendered output, but needs a configured external rendering endpoint. On this particular check, Sitebulb is useful if you want the differences surfaced for you; Screaming Frog is useful if you want to inspect the two versions yourself. With Visaro, make sure the renderer is part of the setup you are assessing.

The same template might carry a marker that tells you which version a page is using. That's a useful distinction between an audit check and custom extraction. Screaming Frog can pull out that marker using XPath, CSS or regex and can also run custom JavaScript. Sitebulb supports CSS-based extraction, including attribute values, and Visaro offers reusable CSS or regex rules. Semrush's standard reports give you plenty of page attributes, but we couldn't verify an equivalent custom extractor. If the marker is important to the diagnosis, the ability to collect it matters more than the breadth of the standard audit report.

How Does Each Tool Explain the Same Finding?

The underlying problem is an unintended noindex directive on service pages that should be eligible for search. Screaming Frog lets you filter to noindex URLs in its Directives tab and inspect the affected pages. Sitebulb puts those URLs into its Indexability report, where Hints add context about the directives and related issues. In Semrush, Issues and Crawled Pages give you the affected URLs and guidance alongside other checks on the page. Visaro's URL Review brings the directive together with robots access and canonical evidence; the Fix Queue can group affected URLs when they belong to the same correction.

Those differences matter because not every noindex on a site is a mistake. You may be happy for some pages to stay out of search. Screaming Frog's filters are useful when an SEO wants to narrow down a large set of URLs and make that judgement directly. Sitebulb's explanations make it easier for a colleague to see why a finding deserves a closer look. Semrush's issue views suit a team already monitoring the client in the same project. Visaro's grouping earns its place once you know which pages share the problem and want to treat them as one piece of work. None of the products can decide which pages the client wants in search from the directive alone.

What Counts as a Confirmed Fix?

For a fair recheck, the original pages need to be reachable on the later run and no longer serve the unwanted directive. Screaming Frog's licensed database mode can compare saved crawls, including changes at URL level. Sitebulb compares audits and lets you open the URL lists behind the change. Marking a Hint fixed is a useful record of what someone did, not a new observation about the site. Its separate Re-Audit Failed URLs feature is for URLs that failed during the crawl, not a substitute for rechecking pages that loaded but carried noindex.

Semrush also compares crawls and has a single-page re-audit, which is useful if the issue comes down to one URL. Visaro offers baseline comparisons as well as a targeted Verify Fix recrawl tied to the group of URLs on a Fix Queue action. So there is a practical distinction between comparing two runs, refreshing one page and verifying the pages attached to an assigned fix. For the client on the call, any of those routes can produce useful evidence. If two pages weren't reached, though, the agency can only confirm the result for the pages it checked.

None of those crawl results on its own says whether Google has put the pages back in its index. Screaming Frog and Sitebulb can bring in Google URL Inspection data through an authorised Search Console connection. That's a different source from the crawler. Keeping the two separate means you can confirm the technical correction without claiming a search result you haven't seen yet.

Where Do the Fix and the Client Report Live?

When the same template affects several pages, you usually need one person to own the correction and a record of which pages it covers. Screaming Frog provides the crawl evidence to carry into whatever system already owns the work. Sitebulb Cloud lets colleagues look at the same audit and its Hints rather than passing files around. Semrush can send an issue directly to Trello with a link back to Site Audit, which can be the most convenient option if that's already where your developers work. Visaro keeps the owner, due date and affected URLs in the audit workspace. Its advantage is that someone opening the action has the original evidence to hand without needing to match a separate ticket to a crawl export.

The reporting difference isn't that one tool can share results and the others can't. Screaming Frog can feed a scheduled Google dashboard through its exports, and Sitebulb Cloud has a direct Data Studio connector. Semrush offers PDF and spreadsheet exports in Site Audit and can use the wider My Reports tool for scheduled reporting. Visaro offers selected audit exports, scheduled packs and controlled client views. A dashboard can suit a client who wants to follow issue trends across several months. A focused view of the affected pages and their rechecks is more useful when the client wants to know what their agency actually fixed.

What the Licence Needs to Cover

The paid tools are not priced around the same thing. Screaming Frog licences are per person, and paid crawl size depends on the resources of the machine running the Spider. The free edition's 500-URL limit is useful to know, but so is the difference in features: you won't assess rendering, saving crawls or custom extraction using that edition. With Sitebulb the decision is also about who needs access and where the crawl runs. A Desktop Lite licence, a Pro licence and a shared Cloud setup are different purchases, especially if you need scheduling or the structured data and hreflang reports.

With Semrush you need to allow for both the size of a run and how often you repeat it. Pro and Guru SEO Toolkit both list up to 20,000 pages per audit, but monthly allowances of 100,000 and 300,000 respectively. Four 20,000-page runs would use 80,000 pages before you count the rest of the sites you look after. Visaro is set up with you, so agree which sites and checks the service needs to cover and whether your sites require JavaScript rendering. Price the same work across all four options, including any task or reporting tools you'd still pay for. An entry price on its own won't tell you what it costs to deliver the audit.

What the Wider Visaro Suite Adds

The client may ask why those service pages came before everything else in the audit. That question takes you beyond the crawler. The SEO can use authorised Search Console data in SEO & Keyword Insights to look at how the pages have appeared in search. If Agency Server is already tracking the site, the team can check whether the pages feature in recorded enquiry journeys. A page that supports a service the client wants to grow may deserve earlier attention than a low-value archive with the same technical warning. The evidence helps explain the priority; it doesn't prove that fixing the warning generated an enquiry.

That review might also lead to work of a different kind. You could ask a developer to correct the template and ask a content strategist to revise the title and description of a priority page. For a supported metadata change on a connected WordPress site, Visaro Push and Site Connector give you an approval and delivery route. The template correction still goes through the developer's normal release process. Visaro Reporting can help bring the relevant evidence into the same branded client update, with the two jobs described separately.

That wider connection is worth looking at if you're building an ongoing service rather than buying a crawler for a single project. It lets the person looking after the account explain why a page was chosen, show what the agency did and agree what to look at next, without treating a technical fix as the end of the conversation.

Which Tools Would Work for You?

Look at a recent job where the audit took more work than you expected. Was it difficult to collect the right data, to explain the finding or to get a clear answer after release? If the investigation was the bottleneck, look at Screaming Frog's crawl and extraction controls or Sitebulb's guided reports and shared audit access. If your agency already has Semrush, take one representative site through Site Audit and check whether it covers the scope, rendering and follow-up you need before committing to another subscription.

If the crawl was straightforward but your team lost time briefing developers, chasing the recheck or writing the client update, put Visaro Website Audit on your shortlist. Walk through the job with the people who would actually do it. Can the developer see enough to start without another call? Can the SEO see what still needs checking? Can the account manager answer the client's question without asking both of them to stop what they're doing?

You may find that you want a specialist crawler for migrations and unusual investigations, and Visaro for ongoing audits and delivery. If you use both, give each a defined job and decide where the action and its sign-off will be recorded. You don't gain much by keeping two copies of the same backlog.

How the Products Score for Different Agencies

For a full-service agency, we give up to four points for crawl and diagnosis, three for assigning and verifying fixes, and three for client reporting. For a technical SEO specialist focused on complex crawls and migrations, we reweight the same marks to seven, two and one, then round. These are our judgements based on documented features, not speed tests or value-for-money ratings.

The higher score is only useful if it reflects the work you sell. A migration specialist might put Screaming Frog first, while a consultancy that spends more time explaining audit evidence might prefer Sitebulb. If your current Semrush plan already covers the job, that may matter more to you than a point on the table.

For a one-to-one Visaro demo, bring a finding from a recent client audit and the update you eventually sent. We can use those to show where Visaro would fit into your work and what you'd still want to do elsewhere.