Overview

Screaming Frog SEO Spider is a desktop website crawler for technical SEO and accessibility audits. It is best suited to experienced SEOs and teams that need detailed crawl data; its broad checks and integrations make it a strong audit tool, though the free crawl cap and paid licence put larger work beyond its no-cost tier.

It audits more than 300 SEO issues, from broken links and server errors to redirect behavior and page metadata. Automated accessibility checks use the open-source axe rule set against Web Content Accessibility Guidelines. The maker, Screaming Frog, was founded in 2010 and is based in Henley-on-Thames, Oxfordshire, UK.

For category-wide comparisons, see SEO Audit Software, SEO Analytics Software, SEO tools, Technical SEO Software, and SEO Crawler Software.

Key features

The crawler checks broken links, server errors and redirects, and identifies missing, duplicated or overly long titles and meta descriptions. That range makes it useful for finding common technical and on-page problems across a site, rather than just tracking search performance.

Integrated Chromium rendering lets it crawl dynamic JavaScript pages, including sites built with Angular, React and Vue.js. This is a meaningful advantage for teams auditing modern front ends, where a crawler that cannot render pages may miss content. For extraction, users can apply CSS Path, XPath or regular expressions, and run custom JavaScript during crawls.

Connections to Google Analytics, Search Console and PageSpeed Insights APIs bring those data sources into the workflow; link metrics integrations include Majestic, Ahrefs and Moz APIs. Scheduled crawls, command-line automation, exports to destinations including Google Sheets, and comparisons between crawls or staging and production support repeat audits. The combination is powerful for an established SEO workflow, but is more capability than a casual site owner may need.

Accessibility checks use axe rules to automate checks against WCAG. They can contribute to an audit, but are not a substitute for a full accessibility assessment.

Pricing

The free version is free and allows up to 500 URLs per crawl, with no signup or email capture. That is a useful way to inspect a smaller site, but saving crawls and configurations and using advanced features are restricted, so it is not a practical replacement for the paid workflow on recurring or larger audits.

The paid licence is 279.00 USD per year, billed $279 per year per licence. It provides an unlimited crawl limit, subject to allocated memory and storage, and is a one-year licence requiring renewal. Bulk discounts apply to purchases of 5 or more licences. This tier suits professionals who regularly crawl larger sites or need the restricted features; the per-licence annual term is less attractive for occasional audits. Technical support is for paid users, with the company aiming to answer queries within 24 hours during usual business hours.

Platforms

Screaming Frog SEO Spider is available for Windows, macOS and Linux, and offers API access. The API option can suit teams integrating crawl work into broader processes, while desktop support across the three operating systems covers common SEO team setups.

Who it's for

This is a strong fit for experienced SEO practitioners, agencies and brands conducting technical audits, especially those working with JavaScript-rendered sites, repeat crawls or multiple analytics and link data sources. Smaller site owners can start with the free 500-URL crawl, but should look elsewhere if they need a simple, fully featured audit without a paid licence. The maker describes the product as designed for experienced SEOs, a positioning reflected in its extraction and automation options.

Pros and cons

Pros: Broad technical checks across links, server responses, redirects and metadata help surface issues in one crawl.
Pros: Chromium rendering and support for Angular, React and Vue.js make it relevant to JavaScript-heavy sites.
Pros: Custom extraction, API integrations, scheduling and crawl comparisons support detailed and repeatable audit work.
Cons: The free tier stops at 500 URLs per crawl and restricts saving and advanced features, limiting its usefulness for ongoing professional work.
Cons: The $279 annual licence renews yearly, and unlimited crawl size still depends on memory and storage.
Cons: Technical support is reserved for paid users, so free users do not receive that support channel.

Alternatives

WebSite Auditor is worth considering for users who want a freemium option with a free 500-URL, one-project tier and a paid Professional plan at 149.00 USD per year; its free plan does not include paid report exports.

A1 Website Analyzer is another freemium option for Windows and macOS users who want a free mode that continues after its 30-day evaluation period, with 500 page URLs per website.

TechSEO360 may suit Windows or macOS users who prefer a fully functional 30-day trial followed by a free tier capped at 500 pages.

Website Crawler is a web- and API-based option for teams that prefer metered crawling, with a free Basic plan allowing 10 pages per day and a Starter tier at 10.00 USD per month for 2,000 pages per month.

CrawlRaven is an alternative for users focused on Google Search Console insights and keyword and page performance, with a free plan for one website.

Geolify is an alternative for users whose needs center on brand audits and prompt monitoring, with a free plan covering one brand and three audits per month.

SEO Crawler is a web- and API-based choice for users who need a free manual crawl limited to one domain and 100 URLs, with paid plans for higher limits and automation.

SiteGuru is a web-based alternative for users seeking a site-audit service with a Small plan at 49.00 USD per month.

Verdict

Choose Screaming Frog SEO Spider if you are an experienced SEO or agency that needs deep technical crawls, JavaScript rendering and repeatable workflows. Its range of checks and extraction options are the central reasons to choose it; the 500-URL free ceiling and annual paid licence make it a weaker fit for occasional or small-site users who need more than a limited sample crawl.

	Screaming Frog SEO Spider	Sonaril
Free plan	Yes
Paid from		$29/mo
Platforms	api, Linux, macOS, Windows	api
Free plan	Yes
Site audit	Yes	Yes
Backlink analysis	Yes	Yes
API access	Yes	Yes
Paid from		$29/mo
Keyword research		Yes
Rank tracking		Yes
Competitor research		Yes

Screaming Frog SEO Spider vs Sonaril

Screaming Frog SEO Spider

Sonaril