Overview

Screaming Frog SEO Log File Analyser is a locally installed desktop tool for examining server access logs through the lens of search and AI bot activity. It is best suited to SEO practitioners who need to connect crawler requests with URL and response behaviour. Its focus is useful and specific, but the free tier is too limited for sustained work on a substantial site.

Log data is stored in a local database, rather than handled as a hosted service. The analyser accepts Apache, W3C Extended and Amazon Elastic Load Balancing logs, and can process millions of events; practical capacity depends on available hard drive space. That makes storage a real consideration for large analyses, but the local workflow suits teams that want log events kept on their own machine.

Key features

Bot verification

The analyser can verify supported search and AI bots as genuine, helping distinguish actual crawler visits from spoofed requests. That is valuable when crawl decisions depend on knowing which bots are reaching the site, rather than treating every request that claims to be a crawler as legitimate. Verification is limited to supported bots, so it is not a general-purpose check of all log traffic.

Crawl and response reporting

Reports cover crawled URLs, crawl frequency, response errors, redirects, bytes downloaded and response times. Taken together, those measures show both where bots go and what happens when they request pages. The reporting is well aimed at crawl diagnostics; readers looking for wider traffic or product analytics should choose a broader tool.

Matching and file handling

Users can import data with a URLs column and match it against log data, including crawl information, directives or external-link data. This can put request activity in context with other URL sets, though the usefulness depends on having that data ready to import. Log files can be brought in by drag and drop, and analysis can be exported to CSV or Excel for further work.

Pricing

The Free plan is free and allows 1,000 log event lines across one project. It is enough to assess the workflow or examine a small sample, but the event cap makes it a poor fit for regular analysis of large logs. Free technical support is included.

The Paid plan costs 139.00 USD per year. It provides unlimited log events, subject to hard drive capacity, and unlimited projects, on a per-user licence. Each licence lasts one year and requires renewal, so teams should account for a separate licence for each user and recurring annual cost. Paid users also receive free technical support. A free trial is available.

Platforms

The desktop application is available for Linux, macOS and Windows. Its local installation and database make it a fit for users who prefer desktop log analysis, rather than a web-based workflow.

Who it's for

This is a strong fit for SEO specialists who need to investigate search and AI bot crawling, validate supported bots, and compare requests with other URL data. Its reporting and local processing are more relevant to that work than to general log monitoring. The free tier suits a limited evaluation; anyone handling ongoing or high-volume analysis will need the paid licence and enough local storage.

Pros and cons

Useful bot verification: Checking supported search and AI bots as genuine helps filter spoofed requests from crawl analysis.
Focused crawl diagnostics: URL, frequency, error, redirect, byte and response-time reporting gives SEO users several practical angles on crawler behaviour.
Local data handling: Log events are stored in a local database, while imports and CSV or Excel exports support a file-based workflow.
Free tier is tightly capped: 1,000 event lines and one project are suitable for sampling, not substantial recurring log analysis.
Paid use is per user: The annual licence renews and requires available hard drive capacity for larger event volumes, which matters for teams and large log archives.

Alternatives

SEO Log Auditor is the better fit for readers who want a free, open-source, locally run alternative, though it has no free trial. Log File Bot Traffic Cost Analyzer offers a free workflow split by log size, from browser triage under 500 MB to exact CLI analysis at 500 MB–50 GB and BigQuery for 50 GB or more. LogLens is a web, API and self-hosted option with a free tier capped at 500K requests per month, one website and 30 days of history, alongside real-time analytics and bot and AI crawler detection.

Nirengi Log Analyzer is a free macOS alternative for users on macOS 14.4 or later who want no subscription or in-app purchase. SEOMER is a web-based alternative with limited daily usage on its free plan and a 5.00 USD one-time 5,000 TOK top-up. Crawl Lab is a free web option with no sign-up, no paid tier and no server-side size limit. Patrick Stox Log File Analyzer is a free web tool that needs no signup, supports multiple files and streams large logs in chunks. Crawler Log Analyser is another free Linux option.

For related software, browse SEO Log File Analysis Tools, Technical SEO Software, SEO Crawler Software and SEO tools.

Verdict

SEO practitioners who need a locally stored, detailed view of search and AI bot crawling should put Screaming Frog SEO Log File Analyser on their shortlist. Bot verification, response reporting and URL matching make it purpose-built for crawl investigation. Look elsewhere if you need a useful free allowance for large logs, a shared team licence, or a web-first workflow.

	Alpha Crawler	Screaming Frog SEO Log File Analyser
Free plan	Yes	Yes
Free trial	No	Yes
Paid from	Free	$11.58/mo
Platforms	self-hosted, Web	Linux, macOS, Windows
Free plan	Yes	Yes
Site audit	Yes
Log-file analysis		Yes

Alpha Crawler vs Screaming Frog SEO Log File Analyser

Alpha Crawler

Screaming Frog SEO Log File Analyser