Overview

Screaming Frog SEO Spider is a website crawler for technical audits, data extraction, and crawl comparison. It suits experienced SEOs and teams that need detailed site-level diagnostics; its strengths are breadth and configurable crawling, while the 500-URL free cap makes the paid licence the practical choice for larger work.

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

Key features

The crawler audits more than 300 SEO issues, including broken links, server errors, redirects, and missing, duplicated, or overly long titles and meta descriptions. That makes it useful for technical and on-page diagnosis, rather than a substitute for a broader search-marketing suite.

Integrated Chromium rendering lets it crawl dynamic JavaScript sites and frameworks such as Angular, React, and Vue.js. Teams can extract page data with CSS Path, XPath, regular expressions, or custom JavaScript, making the tool adaptable when standard crawl fields are not enough.

It connects to Google Analytics, Search Console, and PageSpeed Insights, with link-metric integrations for Majestic, Ahrefs, and Moz. Scheduling, command-line automation, exports including Google Sheets, and comparisons between crawl results or staging and production support repeatable audit workflows. Automated accessibility checks use the open-source axe rule set against Web Content Accessibility Guidelines.

Pricing

The free version is free and allows 500 URLs per crawl without signup or email capture. It is a useful way to inspect smaller sites, but saving crawls and configurations and using advanced features are restricted, so it is a limited fit for ongoing audits.

The Paid Version is 279.00 USD per year, billed $279 per year per licence. It removes the URL crawl limit, subject to allocated memory and storage, and bulk discounts apply for 5+ licences. The one-year licence requires renewal. For teams whose work exceeds the free cap or depends on saved crawl work, the paid licence is the relevant tier; smaller, occasional audits may not justify it.

Platforms

SEO Spider is available for Linux, macOS, and Windows, and lists API access. Its platform coverage suits teams working across common desktop environments; the supplied platform details do not establish a web-based version.

Who it's for

This is aimed at experienced SEOs, agencies, and brands that need configurable technical crawling and recurring audit workflows. Paid users receive technical support, with the company aiming to answer queries within 24 hours during usual business hours. Teams should also account for the privacy policy's stated checks involving username, licence key, IP address, anonymised machine ID, and timestamp; data is stored in secure data centres in the UK and US, with access restricted to authorised personnel.

Pros and cons

Pros: Broad technical checks, JavaScript rendering, flexible extraction, and crawl comparison support both diagnostics and repeatable workflows.
Pros: Integrations with analytics, search, page-speed, and link-metric APIs bring related data into the crawl workflow.
Cons: The free tier's 500-URL crawl cap and restrictions on saving and advanced features make it unsuitable for many continuing or large-site audits.
Cons: The paid licence is annual and renews after one year; its unlimited crawl limit still depends on allocated memory and storage.
Cons: Technical support is for paid users, so free users do not get that support channel.

Alternatives

Choose Ahrefs if you want a freemium option whose free plan offers limited Site Explorer and Site Audit access alongside site data; its supplied details also identify web and API platforms.

Semrush may suit teams looking for a free entry point with one demo project and 10 reports per day, or a paid SEO plan at 117.33 USD per month.

Consider Mangools for its freemium model and plans differentiated by tracked-keyword allowances: 200 on Basic and 700 on Premium.

SEO PowerSuite is another freemium option; its free plan includes one project, 500 URLs, 1,100 backlinks, and one competitor per project.

SpyFu is an alternative with a Basic plan that includes search results and data exports capped at 10k rows each, one live site tracking project, and 5k weekly tracked keyword rankings.

Serpstat offers an Individual plan with five projects, 100 daily searches, 10,000 monthly position checks, and 30,000 audit pages.

For a paid option, Botify has an Essential plan that includes SiteCrawler, HTML Extracts, and ad-hoc crawls, among other capabilities.

Dragon Metrics is a paid alternative with a free trial.

Verdict

Choose Screaming Frog SEO Spider if your team needs deep, configurable technical crawls across standard and JavaScript-rendered sites, with extraction and comparison tools to support recurring audits. Its free tier is useful for small crawls, but the 500-URL cap and saving restrictions push sustained or larger work toward the annual licence. Look elsewhere if you need a broader platform rather than a specialist crawler, or if those licence terms do not fit your workload.

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

Screaming Frog SEO Spider vs Squirrly SEO

Screaming Frog SEO Spider

Squirrly SEO