Overview

Screaming Frog SEO Log File Analyser is a local desktop tool for examining server access logs and understanding search and AI crawler behaviour. It is best suited to SEO practitioners who need to connect bot requests with the URLs and responses they produce. Its focused reporting and local database are strengths; the free edition’s small caps make it a limited workspace for sustained analysis.

It handles Apache, W3C Extended and Amazon Elastic Load Balancing logs, and can analyse millions of events, with capacity ultimately constrained by hard drive space. That makes it a practical choice for substantial local log work, rather than a hosted analytics service. Screaming Frog was founded in 2010 and is based in Henley-on-Thames, Oxfordshire, UK.

Key features

Bot verification

The analyser checks supported search and AI bots to establish whether requests are genuine, helping avoid decisions based on spoofed crawler traffic. This is particularly useful when interpreting bot activity as evidence of how search engines or AI services access a site.

Crawl and response reporting

Reports cover crawled URLs and crawl frequency, as well as errors, redirects, bytes downloaded and response times. The combination helps SEOs see not just what bots request, but where requests encounter response problems or consume bandwidth. It is a focused crawl diagnostic view, not a general-purpose traffic analytics product.

Match and move data

Users can import URL data and match it against log activity, including crawl information, directives or external link data. Log files can be dragged in for import, and analysis data exported to CSV or Excel. This supports comparisons with other URL datasets and onward analysis in spreadsheet workflows without implying an automated integration.

Pricing

The free plan is free and allows 1,000 log event lines across 1 project. That is enough for a small evaluation or narrow sample, but the event cap is quickly restrictive for ongoing analysis of a large site. Free technical support is included.

The paid licence costs 139.00 USD per year, billed per year, per user. It removes log-event and project limits, although practical processing capacity still depends on hard drive capacity. The licence lasts one year and requires renewal, so the annual term and per-user cost matter for teams. Paid users also receive free technical support.

There is a free trial, but no trial length is stated. The main decision is whether the free plan’s event and project caps fit the work: readers who need repeated or large-scale analysis will need the paid annual licence.

Platforms

The application runs on Linux, macOS and Windows. It installs locally and stores log event data in a local database, making it suited to users who want analysis kept on their own machine. Its scale is not unlimited in practice: the maker ties processing capacity to available hard drive space.

Who it's for

This is for SEO practitioners investigating search and AI bot crawling, especially those who need to verify crawlers, examine response behaviour and compare logs with URL datasets. It is a less natural fit for readers seeking a hosted, real-time service or a broader analytics platform; its design is specifically aimed at SEO log analysis.

Pros and cons

Useful crawler validation: verifies supported search and AI bots, reducing the risk of treating spoofed requests as real crawl activity.
Good diagnostic coverage: combines URL and frequency reporting with errors, redirects, bytes and response times.
Local data handling: keeps event data in a local database, with Linux, macOS and Windows support.
Hard free-plan ceiling: 1,000 event lines and 1 project make the free edition better for evaluation than regular large-log work.
Annual, per-user commitment: the 139.00 USD per year paid licence requires renewal, which may be less convenient for occasional or multi-user use.
Storage-bound scale: million-event analysis is possible, but processing capacity depends on hard drive capacity.

Alternatives

Choose SEOMER for web-based SEO checks with a free tier and paid top-ups, rather than a locally installed log analyser. Its free access is limited to quick page checks and daily usage.

LogLens is the alternative to consider when a web, API or self-hosted service and monthly request allowance are a better fit: its free plan includes 500K requests per month, one website and 30 days of history.

SEO Log Auditor is a free, open-source option under the MIT licence that runs locally, for readers who prefer that model over Screaming Frog’s capped free tier and paid annual licence.

Spider-Lens is another free option, with Linux, Windows, macOS, web and self-hosted platforms and no paid plans or usage limits stated.

Consider CrawlGenius Log Analyzer for a web-based alternative: its free plan allows 10,000 log lines per month, one project and a seven-day visible window.

SEO Skill Server Log Analyzer is a free alternative for readers comparing server log analysis options.

EdgeComet Log Analyzer is worth considering if an API or self-hosted option and a paid plan with up to 200K Googlebot requests, two users and 30-day data are a better match; its Professional annual plan costs 87.00 USD per year.

Log File Bot Traffic Cost Analyzer is a free alternative when the goal is bot-traffic cost analysis, with browser triage under 500 MB, CLI handling for 500 MB–50 GB and BigQuery for 50 GB or more.

For broader comparisons, browse SEO Log File Analysis Tools, SEO Crawler Software, Technical SEO Software or SEO tools.

Verdict

Choose Screaming Frog SEO Log File Analyser if you are an SEO who needs locally stored, substantial log analysis with bot verification and detailed crawl-response reporting. Its main advantage is the depth of focused diagnostics across major log formats; its main drawback is that the free tier is tightly capped and serious use requires a renewing per-user annual licence. Look elsewhere if you want a hosted analytics service or a free plan for ongoing large-scale work.

	Screaming Frog SEO Log File Analyser	ZentroSEO
Free plan	Yes	Yes
Free trial	Yes
Paid from	$11.58/mo	Free
Platforms	Linux, macOS, Windows	Web
Free plan	Yes	Yes
Log-file analysis	Yes
Keyword research		Yes
Rank tracking		Yes
Site audit		Yes
Backlink analysis		Yes
Competitor research		Yes

Screaming Frog SEO Log File Analyser vs ZentroSEO

Screaming Frog SEO Log File Analyser

ZentroSEO