What are the best free alternatives to premium enterprise SEO crawlers when you need to audit a two-hundred-thousand-page website over the weekend.
Download run
Fan-out diagram
The searches the AI actually ran for this prompt.
SEED QUERY
What are the best free alternatives to premium enterprise SEO crawlers when you need to audit a two-hundred-thousand-page website over the weekend.
4 real searches · 1 real-search pass
best free open source SEO website crawlers 200000 URLs SiteOne Crawler Crawl4AI Screaming Frog free limits 2026Google ↗
OBSERVEDComparison
SiteOne Crawler documentation crawl limits SEO crawler open sourceGoogle ↗
OBSERVEDInstruction
Crawl4AI documentation sitemap crawling concurrency SEO auditGoogle ↗
OBSERVEDInstruction
Screaming Frog SEO Spider free version 500 URL limit officialGoogle ↗
OBSERVEDOther / navigational
Badge and edge weight = share of passes that produced the query. Hover a query for its intent and routing format.
Query classes
Google's semantic query class for every sub-query: what kind of answer each search is after, simulated vs real.
ChatGPT real searches (4)
Classes come from the query-classifier (a local Laya model). 4 of 4 calls are low-confidence (under 50%) — hover a query in the table to see its confidence.
Searches and sources
ChatGPT4 real searches · gpt-6
best free open source SEO website crawlers 200000 URLs SiteOne Crawler Crawl4AI Screaming Frog free limits 2026 Google ↗
SiteOne Crawler documentation crawl limits SEO crawler open source Google ↗
Crawl4AI documentation sitemap crawling concurrency SEO audit Google ↗
Screaming Frog SEO Spider free version 500 URL limit official Google ↗
- Official website · crawler.siteone.io
- GitHub · github.com
- Official website · freecrawl.net
- GitHub project search · github.com
- Official website · scrapy.org
- Documentation · docs.scrapy.org
- Official website · crawl4ai.com
- GitHub · github.com
- Best SEO Crawler Tools 2026: Compared by Use Case · barracudaseo.com
- Free & Open-Source Web Crawlers Compared (2026) · magpiescraper.com
- 8 Free Screaming Frog Alternatives and Crawl Limits · screpy.com
- What can I use for free in Ahrefs? · help.ahrefs.com
- How are Crawl Credits in Site Audit spent? · help.ahrefs.com
- LibreCrawl source code · github.com
Queries
4 queries · click a column to sort
| Query / type | Search | Intent | Query class | Routing format | Cluster | Freq ↓ | Weight |
|---|---|---|---|---|---|---|---|
best free open source SEO website crawlers 200000 URLs SiteOne Crawler Crawl4AI Screaming Frog free limits 2026 OBSERVED | Google ↗ AI Mode ↗ | — | Comparison | — | — | 1x of 1 | |
SiteOne Crawler documentation crawl limits SEO crawler open source OBSERVED | Google ↗ AI Mode ↗ | — | Instruction | — | — | 1x of 1 | |
Crawl4AI documentation sitemap crawling concurrency SEO audit OBSERVED | Google ↗ AI Mode ↗ | — | Instruction | — | — | 1x of 1 | |
Screaming Frog SEO Spider free version 500 URL limit official OBSERVED | Google ↗ AI Mode ↗ | — | Other / navigational | — | — | 1x of 1 |