Overview

Screaming Frog SEO Spider is a website crawler for technical SEO audits and accessibility checks. It suits experienced SEOs and teams that need detailed site-level diagnostics; its depth is compelling, but larger crawls require a paid licence.

It audits more than 300 SEO issues, including broken links, server errors, redirects, and problems with page titles and meta descriptions. 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 headquartered in Henley-on-Thames, Oxfordshire, UK.

For broader comparisons, browse SEO Analytics Software, SEO Audit Software, SEO Crawler Software, Technical SEO Software, and SEO tools.

Key features

The crawler checks links, server responses, redirects, and page metadata, identifying missing, duplicated, or overly long titles and descriptions. That makes it useful for diagnosing technical and on-page problems across a site, rather than only monitoring search performance.

Integrated Chromium rendering allows crawls of JavaScript-driven pages and frameworks including Angular, React, and Vue.js. This is valuable when a site's important content is rendered dynamically, though teams that do not need that depth may not benefit from the tool's more technical approach.

For custom analysis, it extracts data with CSS Path, XPath, or regular expressions, and supports custom JavaScript during crawling. It also connects to Google Analytics, Search Console, and PageSpeed Insights, with link-metric integrations for Majestic, Ahrefs, and Moz. These options let SEO teams bring crawl findings alongside other site metrics, but they assume users know what data they need to collect and how to interpret it.

Crawls can be scheduled, exported to destinations including Google Sheets, run through the command line, and compared with earlier crawls or between staging and production. Those capabilities suit repeat audits and release checks, not just one-off site scans.

Pricing

The Free plan is free and allows up to 500 URLs per crawl, with no signup or email capture. It is a practical way to audit smaller sites or evaluate the crawler, but saving crawls and configurations and using advanced features are restricted.

The Paid Version costs 279.00 USD per year, billed at $279 per year per licence. It removes the fixed crawl-size cap, although crawl capacity remains subject to allocated memory and storage. The one-year licence requires renewal; bulk discounts apply to five or more licences. This is the fit for ongoing professional work and larger sites, but the per-licence term matters for teams budgeting multiple seats.

A Paid licence is also described as offering unlimited URLs, with custom pricing. The paid tier is the clear choice when the free cap or restricted features get in the way; the free tier remains useful for small, occasional audits.

Platforms

SEO Spider is available for Linux, macOS, and Windows, and supports API access. Its desktop-platform availability suits teams working across those operating systems; the product is not presented as a web-only crawler.

Who it's for

This is a strong fit for experienced SEOs, agencies, and brands conducting technical audits, especially when JavaScript rendering, custom extraction, integrations, or repeatable crawl automation matter. The free version can serve smaller sites and newcomers who want to learn from a bounded crawl, but its 500-URL limit and restricted saving and advanced features make it a poor substitute for a full professional workflow.

Technical support is for paid users, and the company aims to answer queries within 24 hours during usual business hours. The privacy policy says use may involve checks of a username, licence key, IP address, anonymised machine ID, and timestamp; data is stored in secure UK and US data centres with access restricted to authorised personnel.

Pros and cons

Pros: Broad technical checks cover links, server errors, redirects, and common metadata faults across more than 300 SEO issues.
Pros: Chromium rendering, custom extraction, integrations, and crawl comparisons support complex audits and recurring workflows.
Pros: The free version needs no signup and can crawl 500 URLs.
Cons: The free tier restricts saving crawls and configurations and omits advanced features, limiting its usefulness for ongoing work.
Cons: The paid licence renews yearly, is priced per licence, and its uncapped crawl size still depends on allocated memory and storage.
Cons: Technical support is reserved for paid users.

Alternatives

Netpeak Spider is worth comparing for Windows and macOS users who want a freemium crawler; its free plan also caps crawls at 500 URLs and includes five threads and two devices per user.

Ahrefs may suit readers seeking a broader web-based SEO platform: its free plan offers limited Site Explorer and Site Audit access, while its listed platforms include web and API.

Semrush is another freemium option, with a free allowance of one demo project and 10 reports per day.

Moz Pro is an alternative with a free trial and monthly plans, including a $49.00 USD per month Starter plan for individuals managing one website.

SiteGuru may fit teams looking for a web-based option with a Small plan at $49.00 USD per month, covering five websites and 5,000 pages per site.

WooRank offers a freemium alternative with web, API, and extension platforms; its Silver plan is $69.99 USD per month for one user and 100 Review Generations per month.

Click Insights is a paid alternative with a free trial; its Basic plan starts at $12.00 USD per month and includes 100 daily tracked keywords and five projects.

SEO PowerSuite is another freemium option, with a free plan that supports one project, 500 URLs, 1,100 backlinks, and one competitor per project.

Verdict

Choose Screaming Frog SEO Spider if technical crawling is central to your SEO work and you need JavaScript rendering, flexible extraction, integrations, and repeatable audits. Its free tier is a useful starting point, but the 500-URL cap and feature restrictions make the $279.00 USD yearly licence the practical choice for larger or continuing work. Look elsewhere if you need a less technical, web-based approach or do not want a per-licence annual renewal.

	Open SEO Crawler	Screaming Frog SEO Spider
Free plan	Yes	Yes
Free trial	No
Paid from	Free
Platforms	Linux, macOS, self-hosted, Web, Windows	api, Linux, macOS, Windows
Free plan	Yes	Yes
Site audit	Yes	Yes
Competitor research	Yes
Backlink analysis		Yes
API access		Yes

Open SEO Crawler vs Screaming Frog SEO Spider

Open SEO Crawler

Screaming Frog SEO Spider