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The SiteOne Crawler Insider’s Guide

Everything we know about SiteOne Crawler in one document: what it costs, its grades, getting a refund, getting help and what else to look at. Read it here, or keep a copy.

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ToolGPAOctober 2026

SiteOne Crawler

The Insider’s Guide

Free open-source site crawler and audit report, as an app or CLI

SiteOne Crawler, as pictured on crawler.siteone.io

Every plan, grade, refund rule and rival among technical SEO tools, read from SiteOne Crawler’s own pages.

Made by SiteOne · checked Oct 23, 2026 · toolgpa.com

3.0GPA

Contents

  1. 01WelcomeWhat it is, who it suits, its grades and the ten things to know first
  2. 02What it costsEvery plan, the free plan, ways to pay less and how prices have moved
  3. 03What it doesIts main features, where it runs, what it works with and who makes it
  4. 04Where it standsIts grades against its category, and whether to keep it or make your own
  5. 05The alternativesThe tools it is most often weighed against, side by side
  6. 06Quick answersThe questions people ask about it, each answered in a line or two
  7. 07About ToolGPAWho made this guide, what else is on the site, and how to cite it

ToolGPA put this guide together from SiteOne Crawler’s own pages, its app-store listings and our grades. Every fact in it is on SiteOne Crawler’s page too, where it is kept up to date. Checked Oct 23, 2026.

Part 01 · Overview

Welcome

What it is, who it suits, its grades and the ten things to know first

3.0

GPA, above 73 of the 83 other technical SEO tools we grade

SiteOne Crawler is a free, MIT-licensed website crawler made by the web development company SiteOne and offered as a desktop app and as a single command-line binary. A crawl produces an HTML audit report with a 0 to 10 quality score across security, performance, SEO, accessibility and best practices. The same tool can mirror a site for offline use, convert it to Markdown, generate sitemaps, run load tests and fail CI builds on set thresholds.

To get you started, here are 8 things to know about SiteOne Crawler, taken from its own pages and our grades.

The desktop app is a download you open and point at a site, and the CLI is a single binary with no runtime to install.
From our grade for ease of use
  1. 1

    Best for free site-wide audits from a desktop app or CLI

    SiteOne Crawler is a free, MIT-licensed crawler for Mac, Windows and Linux that ends each crawl with an HTML report scoring security, performance, SEO and accessibility, and it can also mirror a site, export Markdown and fail CI builds.

  2. 2

    It is free

    SiteOne Crawler has no paid plan at all. Free and open source under the MIT license: the desktop app, the command-line tool and online sharing of HTML reports.

  3. 3

    It runs on 3 platforms

    macOS, Windows and Linux.

  4. 4

    Audit report and quality score

    Each crawl ends in a self-contained HTML report with a 0 to 10 score, weighted 25% security and 20% each for performance, SEO and accessibility.

  5. 5

    Site-wide checks

    Covers SEO and OpenGraph tags, headings, redirects and 404s, security headers, SSL/TLS certificates, caching headers, content types and DNS.

  6. 6

    JavaScript rendering and screenshots

    An optional browser mode renders each page in Chromium so single-page apps are crawled, and can capture every page as an image, GIF or MP4.

  7. 7

    A 3.0 GPA, above 73 of 83

    That is against the other technical SEO tools we grade, on value, the free plan, features, ease of use and platforms.

  8. 8

    Keep it

    SiteOne Crawler is free, so making your own would save you nothing.

SiteOne Crawler at a glance

Pricing
Free
Free plan
Yes
Free trial
None stated
Runs on
macOS, Windows, Linux
Made by
SiteOne
Category
Technical SEO & Site Audits
Our grade
3.0 GPA, very good

The report card

Best for free site-wide audits from a desktop app or CLI

SiteOne Crawler is a free, MIT-licensed crawler for Mac, Windows and Linux that ends each crawl with an HTML report scoring security, performance, SEO and accessibility, and it can also mirror a site, export Markdown and fail CI builds. It only runs on your own machine, though: there's no hosted crawler, JavaScript sites need the optional browser mode, and the AI features bill through your own API key.

ToolGPA report cardSiteOne CrawlerGraded Oct 23, 2026
SubjectGradeComment
Value for moneyAFree and open source under MIT: the desktop app, the command-line binary and hosted links for sharing reports. You download it and run it on your own computer, with no paid tier on record.
Free plan and trialAFree outright, with every feature included. The only costs are your own: an SMTP server if you want reports emailed, and an LLM provider's charges if you switch the AI assistant on.
FeaturesCSite-wide checks of SEO and OpenGraph tags, headings, redirects and 404s, security headers, SSL, caching and DNS, with a 0 to 10 score, CI gates and an offline mirror. The gaps: no hosted crawler, and no Search Console or analytics data on record.
Ease of useBNo rating on record. The desktop app is a download you open and point at a site, and the CLI is a single binary with no runtime to install. JavaScript rendering is an extra mode you switch on.
Platforms and integrationsCMac, Windows and Linux, with GitHub Actions, GitLab CI, Jenkins and your choice of OpenAI, Anthropic, Gemini or a local model. A program for computers only: no web or phone version.
Grade point averageVery good, out of 4.03.0

An A is worth 4 points, a B 3, a C 2, a D 1 and an F nothing. The GPA is the average of the five.

Who SiteOne Crawler is for

  • Fits if you want a whole-site audit report without paying for a licence
  • Works for developers adding a site quality gate to a CI pipeline

Who it is not for

  • Skip it if you want crawls run in the cloud, as it runs only on your own computer or server
  • Watch out: single-page apps are crawled only in the optional browser mode, which renders them in Chromium
  • Not for you if you want AI help with no bill elsewhere, as the assistant uses your own API key or a local model
  • Tight if you want reports emailed, which needs an SMTP server of your own
  • Watch out: the desktop app comes from the project's own links, not yet the Mac App Store or Microsoft Store

Good to know

Good for

  • Developers and QA engineers auditing a whole site at no cost
  • Adding a site quality check to a CI pipeline
  • Archiving a site as an offline copy or Markdown for AI tools

Worth knowing

  • It runs on your own computer or server; there is no hosted crawler, and emailed reports need your own SMTP server.
  • The AI assistant uses your own API key or local model, so any LLM charges come from that provider.
  • Pages built by JavaScript are crawled only in the optional browser mode, which renders them in Chromium.
  • The desktop app is downloaded from the project's links; its page says it is not yet in the Mac App Store or Microsoft Store.

Part 02 · Pricing

What it costs

Every plan, the free plan, ways to pay less and how prices have moved

Free

No paid plan at all

SiteOne Crawler is free to use.

Free and open source under MIT: the desktop app, the command-line binary and hosted links for sharing reports.
From our grade for value for money

  • Free

    $0

    The desktop app and command-line crawler, run on your own computer, with free hosted links for sharing reports.

The free plan

Free and open source under the MIT license: the desktop app, the command-line tool and online sharing of HTML reports.

Read from crawler.siteone.io on Oct 23, 2026.

Part 03 · Features

What it does

Its main features, where it runs, what it works with and who makes it

3

Places it runs: macOS, Windows and Linux

Free open-source site crawler and audit report, as an app or CLI. Here is what it does, as its own site describes it, and what it covers: open source, AI features, site audit.

The gaps: no hosted crawler, and no Search Console or analytics data on record.
From our grade for features
Audit report and quality score
Each crawl ends in a self-contained HTML report with a 0 to 10 score, weighted 25% security and 20% each for performance, SEO and accessibility.
Site-wide checks
Covers SEO and OpenGraph tags, headings, redirects and 404s, security headers, SSL/TLS certificates, caching headers, content types and DNS.
JavaScript rendering and screenshots
An optional browser mode renders each page in Chromium so single-page apps are crawled, and can capture every page as an image, GIF or MP4.
CI/CD quality gate
The --ci option fails a build when scores fall below set thresholds, with JUnit XML output and annotations for GitHub Actions.
Offline clone and Markdown export
Saves a static mirror of a whole site, assets included, or converts its pages to Markdown and an llms.txt file.
Optional AI assistant
With your own key for OpenAI, Anthropic or Gemini, or a local model, adds per-page SEO rewrites, spelling checks and a site summary.

Where it runs

  • macOS
  • Windows
  • Linux

What it works with

  • GitHub Actions
  • GitLab CI
  • Jenkins
  • OpenAI
  • Anthropic
  • Google Gemini
  • Ollama
  • LM Studio

SiteOne Crawler is made by SiteOne.

Part 04 · Standing

Where it stands

Its grades against its category, and whether to keep it or make your own

73/83

Other technical SEO tools it is graded above

SiteOne Crawler's GPA of 3.0 is higher than 73 of the 83 other technical SEO tools we grade, and level with 7.

It stands best on free plan and trial (A, above 62 of 83) and worst on platforms and integrations (C, above 3).

SiteOne Crawler has no paid plan.

On features, ease of use and platforms it scores 2.3 out of 4. Nothing scores higher for less, though at least one tool matches that score at a lower price.

Each grade against the category

Every bar is all 84 technical SEO tools we grade, cut by the letter each got. SiteOne Crawler’s own letter is outlined.

  • AValue for moneyAbove 54 of 83
  • AFree plan and trialAbove 62 of 83
  • CFeaturesAbove 10 of 83
  • BEase of useAbove 62 of 83
  • CPlatforms and integrationsAbove 3 of 83

Price against what you get

Each dot is one of 73 technical SEO tools. Further left costs less; higher up scores better on features, ease of use and platforms. SiteOne Crawler is the marked dot.

D1.0C2.0B3.0A4.0Free$2$5$20$50$200$500$2k$5kMore for lessCosts more, scores moreCosts less, scores lessCosts more, scores lessSiteOne CrawlerYellow Lab ToolsGoogle Search Console

What paid plans start at, a month (each step along is roughly double) →

Keep it, or make your own?

Whether this is something you could build for yourself with an AI app builder, and what you would give up.

Keep it

SiteOne Crawler is free, so making your own would save you nothing.

And it is not the kind of software a weekend replaces. It is one of the better ones too: its GPA of 3.0 is higher than 73 of the 83 other technical SEO tools we grade.

What you could not

  • A crawler that checks every page of a site.
  • Apps for macOS, Windows and Linux that stay in step with each other.
  • It plugs into other products, GitHub Actions, GitLab CI and Jenkins among them.
  • AI features, unless you pay a model provider for each request yourself.

What this rests on. SiteOne Crawler’s listing: what it does, where it runs, what it plugs into and what it costs. It is a judgement about the kind of software this is. We have not built a replacement for it, and making your own means looking after it too. How we decide, and every tool’s verdict.

Part 05 · Alternatives

The alternatives

The tools it is most often weighed against, side by side

Screaming Frog SEO Spider, Sitebulb, Beam Us Up, Visual SEO Studio and Unlighthouse

The 5 tools SiteOne Crawler is most often weighed against, with where each one differs from it.

Part 06 · Questions

Quick answers

The questions people ask about it, each answered in a line or two

12

Questions, each answered in a line or two

The short version of everything above, for when you only need the answer. Each one is told in full in its part of the guide.

Is SiteOne Crawler free?

Yes. SiteOne Crawler is free to use.

How much does SiteOne Crawler cost?

SiteOne Crawler lists one plan. Free: $0.

What platforms does SiteOne Crawler work on?

SiteOne Crawler is available on macOS, Windows and Linux.

Does SiteOne Crawler have an Android app?

No Android app was listed when its pages were read on Oct 23, 2026. SiteOne Crawler is listed for macOS, Windows and Linux.

Does SiteOne Crawler have an iPhone app?

No iPhone app was listed when its pages were read on Oct 23, 2026. SiteOne Crawler is listed for macOS, Windows and Linux.

Is SiteOne Crawler open source?

Yes. SiteOne Crawler is open source, according to its own site.

What does SiteOne Crawler integrate with?

SiteOne Crawler's listing names GitHub Actions, GitLab CI, Jenkins, OpenAI, Anthropic, Google Gemini, Ollama and LM Studio.

Who makes SiteOne Crawler?

SiteOne Crawler is made by SiteOne.

What are the alternatives to SiteOne Crawler?

The closest alternatives to SiteOne Crawler in our directory are Screaming Frog SEO Spider, Sitebulb, Beam Us Up, Visual SEO Studio and Unlighthouse.

How does SiteOne Crawler compare with other technical SEO tools?

SiteOne Crawler's GPA of 3.0 is higher than 73 of the 83 other technical SEO tools we grade, and level with 7.

Is SiteOne Crawler good value for money?

ToolGPA grades SiteOne Crawler A for value for money. SiteOne Crawler has no paid plan.

Could I make my own version of SiteOne Crawler?

SiteOne Crawler is free, so making your own would save you nothing. And it is not the kind of software a weekend replaces.

Where this guide comes from

The prices, plans, platforms and features were read from SiteOne Crawler’s own pages on Oct 23, 2026, and the grades were given on Oct 23, 2026. Graded from this listing, whose facts were read from SiteOne's own pages on 23 October 2026. Not based on using the product, and shorter than our full reviews.

Every tool we list gets five grades, A to F, each with its reason, and a GPA that averages them. How each is decided is at toolgpa.com/grades. This guide is ToolGPA’s own work; it is not made, paid for or approved by SiteOne. Prices change, so check crawler.siteone.io before you buy.

Part 07 · About

About ToolGPA

Who made this guide, what else is on the site, and how to cite it

3,189

Tools graded, in 94 categories

ToolGPA grades software the way a school report grades a pupil: five subjects, a letter for each with the reason written beside it, and a GPA that averages them. Prices, plans and platforms are read from each maker’s own pages and dated, so you always know how fresh a figure is.

Every grade, review and ranking on ToolGPA is our own judgement. No company can pay for a grade or change one. Every tool on the site has a guide like this one, free to download and pass on. It all lives at toolgpa.com.

  • 3,189

    tools graded

  • 94

    categories

  • 426

    price changes on record

  • 579

    apps priced in 12 countries

What else is on toolgpa.com

Scan for the live page

Prices and grades as they are today

Quoting this guide?

Please name ToolGPA and link to the live page, so readers can check the figures for themselves:

ToolGPA, "SiteOne Crawler: The Insider's Guide", checked Oct 23, 2026. https://toolgpa.com/tools/siteone-crawler

Know someone choosing between technical SEO tools?

Send them this guide: toolgpa.com/tools/siteone-crawler/guide

ToolGPA elsewhere: youtube.com/@toolgpa

See our other guides

The best-graded technical SEO tools after SiteOne Crawler, each with an Insider's Guide of its own.

ToolGPA

Choosing software? Every tool graded, every price dated.

Compare tools at toolgpa.com ›

Everything in this guide is ToolGPA’s own summary of what SiteOne Crawler’s pages, its app-store listings and public reviews said on the dates shown. Grades are our judgement under the rules at toolgpa.com/grades. Every grade, review and ranking on ToolGPA is our own judgement. No company can pay for a grade or change one. SiteOne Crawler is a trademark of its owner, and this guide is not made, paid for or approved by SiteOne. Prices and plans change: check crawler.siteone.io before you buy.