TEARDOWN 123 · REVIEWED 2026-08-16
Sitebulb
Sitebulb crawls the specific website you point it at using an automated browser that renders each page the way a real browser would, then runs a library of 300+ pre-built checks to surface and prioritize technical SEO issues. It ships as desktop software or a cloud-hosted crawler for larger, scheduled audits, with built-in Google Search Console, Analytics, and Sheets integrations.
Crawling with an automated browser and comparing the raw page source against what actually renders on screen is a known, open pattern — matching Sitebulb's 300+ analysis Hints and cloud scheduling is a multi-week project, not a data moat.
What you lose building it yourself
- ✕300+ hand-tuned issue-detection Hints
- ✕Crawl-map visualizations and cloud scheduling
- ✕Handling hundreds of thousands of URLs without your machine choking
Why people still pay
The math is about maintenance, not features: a weekend script needs someone to keep extending its rules engine and babysitting large crawls on your own hardware indefinitely, while a subscription shifts that ongoing upkeep onto Sitebulb.
A NARROWER SITE CRAWLER
An AI coding tool can wire up Playwright to crawl a handful of pages, render them like a browser, and flag basic technical issues — that part is a real, buildable weekend project. Matching Sitebulb's 300+ built-in checks, crawl-map visuals, and scheduled cloud crawls of hundreds of thousands of URLs is a much larger undertaking. Tier B here means real engineering work, not a missing data source.
StackPlaywright or Puppeteer (headless Chrome) for crawling and JS rendering · a custom rules engine for issue checks · a CSV or JSON export for the final report.
Build a command-line crawler in Python using Playwright. Given a start URL and a max-page limit, crawl same-domain internal links only. For each page, fetch both the raw HTML response and the fully rendered DOM after JavaScript execution, and flag pages where they differ meaningfully. Check each page for: missing/duplicate title tags, missing meta descriptions, broken internal links (4xx/5xx), and redirect chains over 2 hops. Respect robots.txt with a 1s delay. Output a single CSV report grouped by issue type.
Similar tools
Free alternative: Screaming Frog — its free tier covers crawling and technical auditing up to 500 URLs for free; nothing free replicates Sitebulb's automated visualizations and prioritized audit scoring, which is what you're actually paying for
Vendor's own claim
"Sitebulb uses an Evergreen Chromium rendering engine, just like Google. So you can view each page as Googlebot does."
sitebulb.com/features/evergreen-googlebot-crawler/ · RETRIEVED 2026-08-16
QUESTIONS
Is there a free plan?
No free tier — Sitebulb offers a 14-day free trial (no credit card required, equivalent to the Pro plan), after which it falls back to a paid Lite, Pro, or Cloud subscription.
Does Sitebulb use AI to write the audit findings?
No — the 300+ 'Hints' are a deterministic, rule-based system built by Sitebulb, not AI-generated. The only AI-facing feature is an announced connector that would let an AI assistant query your own audit data directly, which is waitlist-only as of August 2026.
What's the actual difference between Desktop and Cloud?
Desktop runs crawls on your own machine and is capped by its plan (10,000 URLs on Lite, 500,000 on Pro). Cloud runs crawls on Sitebulb's servers instead, removing project limits and adding scheduling and team collaboration, starting at $125/month for 2+ users.