Sitebulb Alternatives (2026): Free and Paid Options, Honestly Compared

Sitebulb is one of the most respected technical-SEO crawlers around, and it earns the reputation — its visual crawl maps and prioritised “Hints” turn a raw crawl into something you can act on. But people go looking for alternatives for consistent reasons: there is no permanent free tier, the main product is a desktop install, and pricing now runs $18/month for Lite (capped at 10,000 URLs), $42/month for Pro, and from $245/month for the cloud version at the time of writing (August 2026). For an agency running weekly client audits, that can be money well spent. If you have one site and one question — usually some version of “is my structure holding me back?” — it’s a subscription and a download for a single answer.

This is an honest comparison of the six alternatives worth considering, sorted by the job you’re actually trying to do. We build one of them, and we’ll be clear about what ours doesn’t do.

First, name the job

“Sitebulb alternative” hides three different needs, and the right pick depends on which one is yours:

1. A full technical audit — hundreds of checks, JavaScript rendering, client-ready reports. You need a heavyweight crawler, and you should expect to pay.
2. One specific answer — orphan pages, crawl depth, internal-link structure, what AI crawlers can see. A focused free tool answers this faster than a suite.
3. Continuous monitoring at scale — scheduled cloud crawls, log-file analysis, big sites. That’s a cloud platform with cloud pricing.

The six alternatives, honestly

1. Crawlmouse — free, browser-based, focused on structure

Full disclosure: this is our tool. Crawlmouse takes the narrow-but-free approach. You paste a URL and it crawls the live site in the browser — nothing to install, no trial clock, no per-seat licence. It maps the internal-link graph and returns a single A–F grade plus the specific problems behind it: orphan pages, pages buried too deep, weak hubs, thin anchor text.

One real difference worth naming: Sitebulb renders JavaScript, while Crawlmouse deliberately reads the static HTML your server returns — because that static read is what a non-rendering AI crawler (the bots behind ChatGPT, Claude, and Perplexity) sees. It surfaces links that only exist after JavaScript runs and would be invisible to those systems. Different lens, both honest: Sitebulb shows you the fully rendered site; Crawlmouse shows you the site a plain crawler sees.

What it won’t do: Sitebulb’s 300+ checks, accessibility auditing, JavaScript rendering, or client-ready PDF reports. It isn’t a replacement for a full technical audit and doesn’t pretend to be. If internal linking or AI-readiness is the question in front of you, it answers in about two minutes, free.

Pick it when: you want the internal-linking or AI-visibility verdict now, without an install or a subscription.

2. Screaming Frog SEO Spider — the closest like-for-like swap

If you want everything Sitebulb does in spirit — a deep desktop crawler that finds broken links, redirect chains, duplicate content, metadata problems, and renders JavaScript — Screaming Frog is the industry default and the closest true replacement. The free version crawls up to 500 URLs, which genuinely covers many small sites; the paid licence is £199/year (about $279 at the time of writing), which undercuts Sitebulb Pro over a year of use.

The trade-off is presentation. Screaming Frog gives you power and spreadsheet-like density; Sitebulb’s whole pitch is turning that density into prioritised, explained Hints. If you know what you’re looking at, Screaming Frog is arguably the better value. If you want the tool to explain the findings, that’s the thing you’d be giving up. We’ve written a fuller comparison in Sitebulb vs Screaming Frog and a no-install take in the Screaming Frog alternative post.

Pick it when: you want a full technical crawler, you’re comfortable reading crawl data, and £199/year (about $279 at the time of writing) beats a monthly subscription for you.

3. Ahrefs Site Audit — if you already pay for the suite

Ahrefs’ Site Audit is a cloud crawler bundled into a broader SEO suite (backlinks, keywords, rank tracking). Starter pricing begins at $29/month with meaningful limits, and the plans most teams actually use cost more. As a pure Sitebulb replacement it’s rarely the reason to subscribe — but if you already pay for Ahrefs, its Site Audit may cover enough of the job that a second crawler is redundant.

Pick it when: you already have (or need) the suite, and a good-enough cloud audit beats managing another tool.

4. JetOctopus — cloud crawling and log files at scale

JetOctopus is a cloud crawler whose real strength is log-file analysis — seeing what Googlebot actually crawls, not just what your site contains. Entry pricing is listed at €379/month on its G2 profile at the time of writing, which places it in a different budget category from Sitebulb’s desktop plans. For big sites where crawl budget is a real problem, that can be justified; for a small site’s structure question, it’s the wrong size of tool. We compare it in more depth in Sitebulb vs JetOctopus vs Oncrawl.

Pick it when: you run a large site, you need log-file truth, and the budget matches.

5. Oncrawl — enterprise crawling with a data-science bent

Oncrawl pairs cloud crawling with log analysis and lets you cross crawl data with analytics and Search Console data. Pricing is quote-based — no public price list — which tells you the intended customer: enterprise sites and technical teams, not solo site owners. It’s a genuine Sitebulb alternative only at the top end of what Sitebulb Cloud does.

Pick it when: you’re enterprise-scale and want crawl data joined to analytics data.

6. SEOnaut — free and open source, if you’ll host it yourself

SEOnaut is an open-source (MIT-licensed) auditing tool that crawls a site and reports issues ordered by severity. It’s free forever and yours to run — the honest cost is that you host and maintain it yourself, and its check depth is closer to “solid essentials” than Sitebulb’s 300 Hints. For developers who prefer owning their tools, it’s a legitimate path most roundups ignore.

Pick it when: you’re technical, you self-host by preference, and free-with-effort beats paid-with-polish.

When Sitebulb is still the right choice

An honest alternatives post should say this plainly: if you audit client sites regularly, need findings explained with severity and a fix, want visual crawl maps for reports, or care about the accessibility auditing almost nobody else bundles in — Sitebulb earns its price, and switching would cost you more in time than it saves in money. The alternatives above win on price, on focus, or on scale. None of them beats Sitebulb at being Sitebulb.

The short version

• Full audit, best value: Screaming Frog (£199/year, about $279 at the time of writing, free under 500 URLs).
• One fast, free answer on structure or AI-readiness: Crawlmouse (browser, no signup).
• Already an Ahrefs customer: use Site Audit before buying anything else.
• Big site, log files, budget to match: JetOctopus or Oncrawl.
• Developer who self-hosts: SEOnaut.
• Weekly client audits with polished reports: stay with Sitebulb.

A sensible sequence for most site owners: run the free grade first to see whether structure is even your problem — and bring in a heavier crawler only if the answer says you need one.