Screaming Frog is the industry standard for technical SEO crawling. IATO is the cloud-native, AI-powered alternative. Here's an honest comparison to help you choose.
Screaming Frog SEO Spider is a desktop application that has been the go-to crawler for SEO professionals since 2010. It's powerful, mature, and deeply configurable. However, it requires a local installation, consumes your machine's resources during crawls, and has no built-in sitemap editor, AI features, or API.
IATO is a cloud-based platform launched in 2025 that combines website crawling with visual sitemap editing, AI-powered content restructuring, and a full developer platform. It runs entirely in the browser with no downloads required.
| Capability | Screaming Frog | IATO |
|---|---|---|
| Platform | Desktop (Windows, Mac, Linux) | Cloud (browser-based) |
| Max crawl size | Unlimited (limited by your RAM) | 250,000 pages per session |
| JavaScript rendering | ✔ (Chromium) | ✔ Browser-based |
| Visual sitemap editor | ✘ | ✔ Drag-and-drop with AI |
| AI-powered restructuring | ✘ | ✔ Claude, GPT-4, BYOK |
| REST API | ✘ | ✔ 440+ endpoints |
| TypeScript SDK | ✘ | ✔ Published on npm |
| MCP server for AI agents | ✘ | ✔ 105 tools |
| Team collaboration | ✘ (file-based) | ✔ Multi-workspace |
| Scheduled crawls | ✘ (manual only) | ✔ Daily, weekly, monthly |
| Google Search Console | ✔ | ✔ |
| Redirect map export | ✘ | ✔ |
| Price (annual) | £199/yr (~$250) | Free Trial available; Pro from $49/mo |
Raw crawl power. Screaming Frog can crawl millions of pages if your machine has enough RAM. For enterprise sites with 500K+ pages, its desktop architecture means you're limited only by hardware, not a platform cap.
Configuration depth. After 14+ years of development, Screaming Frog offers extremely granular crawl configuration: custom extraction, regex filters, advanced robots.txt handling, and over 100 audit checks. Power users who need low-level control will find more knobs to turn.
Industry trust. Screaming Frog is used by virtually every SEO agency and has extensive third-party documentation, tutorials, and community support. It's a known quantity.
No download, no resource drain. IATO runs entirely in the cloud. You don't need to install software, manage Java dependencies, or dedicate your laptop's RAM to a crawl. Start a 50,000-page crawl and close your browser — it keeps running.
Crawling + planning in one tool. Screaming Frog tells you what your site looks like. IATO also lets you plan what it should look like. The visual sitemap editor with AI assistance means you can go from audit to restructuring plan without switching tools or exporting data.
AI-native features. IATO's AI Sitemap Assistant can restructure your site based on plain-language instructions. The AI Taxonomy Builder classifies content automatically. No other crawler offers this level of AI integration.
Developer platform. With 440+ REST API endpoints, a TypeScript SDK, and an 105-tool MCP server, IATO is built for automation. Screaming Frog has no API — everything must be done through the GUI.
Team-friendly. Multi-workspace support, cloud-stored results, and shareable project links make IATO practical for agencies and distributed teams. Screaming Frog stores everything in local files.
You need to crawl 500K+ page sites regularly, require extremely granular crawl configuration, work solo and don't need collaboration features, or your workflow is deeply built around Screaming Frog's export formats and integrations.
You want cloud-based crawling without installing software, need to go from audit to restructuring plan in one workflow, want AI assistance for content governance, need API/SDK access for automation, or work in a team that needs shared access to crawl data.
Learn more about the concepts behind these tools: What is Technical SEO?, Understanding Crawl Depth, and our step-by-step Technical SEO Audit Guide. If you're evaluating tools for a migration project, see our Site Migration Guide.
500 pages per crawl, full API access, AI sitemap assistant. No credit card required.
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