AI Visibility · Tool Comparison
Screaming Frog and 3LA both analyse which AI bots crawl your site — and as of 2026, they use strikingly similar verification methods. The difference is how they run. Screaming Frog is a powerful offline desktop crawler you point at exported logs. 3LA classifies and scores AI-crawler traffic in real time, server-side, as part of a three-layer audit.
Short version: Choose Screaming Frog’s Log File Analyser if you want deep, offline desktop analysis of crawl and log data with granular technical control. Choose 3LA if you want real-time, server-side AI-crawler classification and scoring combined with live citation testing across five AI models. Screaming Frog is the technical analyst’s desktop tool. 3LA is the always-on monitoring and scoring layer.
What Screaming Frog does well
Screaming Frog is a deserved staple of technical SEO, and its Log File Analyser is one of the most respected tools for understanding crawler behaviour. It rewards technical users with depth and control.
The Log File Analyser ingests your server log files and shows exactly which bots hit your site, how often, which URLs they request, and where they encounter errors. The 2026 release added AI-bot verification — confirming whether a crawler claiming to be GPTBot, ClaudeBot or PerplexityBot is genuine, using official IP ranges pulled from JSON sources, reverse DNS and ASN checks. It groups AI bots, ships with presets for the major AI crawlers, and gives you the granular, exportable detail that technical SEOs value. As a desktop application, it offers complete control over how you slice the data.
Where Screaming Frog is ahead of us today: depth of offline log analysis, granular technical filtering, and the maturity of its crawl tooling. Notably, its 2026 bot-verification approach — IP ranges, rDNS, ASN — is the same methodology we consider best practice. If deep, hands-on technical log analysis is what you need, Screaming Frog is excellent.
What 3LA does differently
The verification methods overlap, so the honest difference is not what each tool checks — it is how and when. Screaming Frog is an offline desktop application: you export logs, load them, and analyse them in sessions. 3LA runs server-side in real time, classifying and scoring AI-crawler traffic continuously as it happens.
That difference matters in two ways. First, 3LA’s crawler analysis is always on — it does not depend on you remembering to export and load logs. Second, crawler data in 3LA is one layer of a larger picture: it sits alongside live citation testing across ChatGPT, Claude, Gemini, Perplexity and Mistral, and feeds a three-layer score covering human, search and AI. Screaming Frog tells you, in depth, who crawled you. 3LA tells you who crawled you, whether they then cite you, and how your content scores across all three layers — continuously.
Head-to-head
| Capability | Screaming Frog | 3LA |
|---|---|---|
| Log file analysis depth | Deep, granular | Real-time classification |
| AI-bot verification (IP/rDNS/ASN) | Yes (2026) | Yes |
| Real-time server-side monitoring | Offline desktop | Always on |
| Live citation testing (5 AI models) | No | Core feature |
| Three-layer score (human/search/AI) | No | LayerScore (L1/L2/L3) |
| Granular technical filtering | Extensive | Dashboard views |
| Setup | Desktop app + log export | No export, runs live |
Screaming Frog wins on offline analytical depth and granular control. 3LA wins on real-time monitoring and connecting crawler data to citation outcomes and scoring. The deep desktop filtering we do not replicate is a different product model, not a limitation — 3LA is built to run continuously rather than in analytical sessions.
Who should choose which
Choose Screaming Frog if
- You are a technical SEO who lives in log data
- You want deep, granular offline analysis
- You prefer a desktop tool with full control
- One-off deep audits suit your workflow
- Crawler analysis is a standalone need
Choose 3LA if
- You want always-on crawler monitoring
- You want crawler data tied to citation outcomes
- You want a three-layer score, not just logs
- You operate in the Nordic market or in English
- You prefer no log export — it runs server-side
The strongest setup: use both
Screaming Frog and 3LA are complementary rather than competing — one for deep periodic analysis, one for continuous monitoring.
Use Screaming Frog’s Log File Analyser for deep, hands-on technical audits when you need to investigate crawler behaviour in granular detail offline. Then use 3LA for the always-on layer: real-time AI-crawler classification, live citation testing across five models, and a three-layer score that connects who crawls you to whether they cite you. Screaming Frog is the deep-dive session; 3LA is the continuous signal between sessions.
Screaming Frog analyses logs in depth, offline. 3LA monitors and scores in real time, server-side. Investigate with Screaming Frog, monitor continuously with 3LA.
Screaming Frog shows who crawled you. 3LA shows whether they then cite you. Test it in 45 seconds.
Run a free 3LA auditFrequently asked questions
Is 3LA a replacement for Screaming Frog’s Log File Analyser?
Not exactly. Screaming Frog is a deep offline desktop tool for granular log analysis. 3LA does real-time, server-side AI-crawler classification as one layer of a broader audit that also tests citation across five AI models. They suit different workflows — deep periodic analysis versus continuous monitoring — and work well together.
Both verify AI bots with IP ranges and rDNS — what’s the difference?
The verification methodology is genuinely similar; Screaming Frog added it in its 2026 release using IP ranges, reverse DNS and ASN checks. The difference is execution: Screaming Frog runs offline on exported logs in sessions, while 3LA runs the same class of verification server-side and continuously, tied to scoring and citation testing.
Does 3LA require me to export server logs?
No. Unlike Screaming Frog’s desktop Log File Analyser, which ingests exported log files, 3LA’s crawler analysis runs server-side in real time. There is no export step — classification happens continuously as crawlers hit your site.
Can I use Screaming Frog and 3LA together?
Yes, and it is a strong combination. Use Screaming Frog for deep, granular offline log audits when you need to investigate in detail, and 3LA for continuous real-time crawler monitoring, citation testing and three-layer scoring between those deep dives.