100% free and open source · updated as search and AI change

Open-source SEO and GEO software that runs on your computer

Free desktop programs for search engines and AI answers: crawling, rankings, keyword research, index checks and server log analysis, for Google as well as ChatGPT, Gemini, Perplexity and AI Overviews. Updated continuously as search engines and AI assistants change, and your data never leaves your computer.

Download free See the programs

100% free and open source · Windows, macOS & Linux · No account, no limits

The OctopusOn SEO family

One program for every SEO job

Each program does one job well, with the same look, shortcuts and exports. More are on the way.

100% free · open source

SEO Crawler

A free SEO spider and site audit tool: crawl like a search engine, render JavaScript, find broken links and redirects, and get an explainable SEO score.

Learn more 100% free · open source

Log Analyser

Which bots really crawl your site, how often, and what they hit — from your server logs.

Learn more 100% free · open source

SERP Checker

Check rankings on Google, Bing and Yandex, track keyword positions and get a keyword difficulty you can explain.

Learn more 100% free · open source

SEO Keyword Research

Find keyword ideas, group them into clusters one page can target and map them to your site.

Learn more 100% free · open source

Index Checker

Find the URLs search engines still index but your site no longer serves, and get redirect rules ready to deploy.

Learn more
Why OctopusOn SEO

Open, local and always up to date

No subscriptions, no URL limits, no uploads.

100% free and open source

No paid version, no trial, no limits. Every line of code is on GitHub: read it, audit it, build it yourself or contribute.

SEO and GEO in one place

Classic rankings next to AI visibility: AI crawlers, AI referrals and the sources AI answers draw on.

Always up to date

Search engines and AI assistants change every month; the programs follow with frequent releases, each documented in the changelog.

Your data stays local

Logs, crawls and keyword lists are stored and analysed on your computer. Nothing is uploaded.

A command line for every program

Every feature also runs from the terminal: script monthly reports, schedule crawls and export to Excel.

Fast on large sites

Rust engines handle hundreds of millions of log lines and crawls of large sites on an ordinary laptop.

100% free and open source

Free forever. APIs are optional

There is no paid version, no trial and no limit: every program is free and open source. Search APIs are an optional extra for more data: bring your own keys, or use one OctopusOn connection for all of them.

100% free

Free

Crawling, log analysis, scoring and every report run locally at no cost and with no limits.

  • No account needed
  • No URL or project limits
Optional

Your own API keys

Connect the providers you already pay for and strengthen the analysis with their data.

  • DataForSEO, Serper, SerpApi, Yandex Search API and Wordstat
  • Google Search Console and Ads with your own Google sign-in
  • Budgets and a cost estimate before every run
Optional

One OctopusOn connection

Skip the sign-ups: connect once at my.octopuson.com and every program uses every supported API with prepaid credits.

  • Pay per request, no subscription
  • One balance for all programs
  • Choose your key or credits per source
Get credits
Optional · OctopusOn credits

Estimate what your work costs in credits

Only if you choose OctopusOn credits for search APIs. The programs themselves are 100% free; with your own API keys you pay the providers directly and use no credits.

  • Google result page via Serper1.4 credits / query
    700
  • Google, Bing or Yandex result page via DataForSEO2.7 credits / query
    810
  • Yandex result page via Yandex Search API5.4 credits / query
    540
  • Google result page via SerpApi20.3 credits / query
    0
  • Search volumes via DataForSEO (Google Ads)101 credits / 1,000 keywords
    505
  • Yandex Wordstat request0.2 credits / request
    44
Estimated total2,599 credits≈ $2.60

Estimates at the providers' current list prices. The exact price of every request is shown in the program before it runs and at my.octopuson.com.

Buy credits

Frequently asked questions

Are the programs really free?

Yes, 100%. There is no paid version, no trial and no limit on sites, URLs or log lines, and the code is open source. You only pay if you choose to: search API providers for your own keys, or OctopusOn credits for one connection to all of them.

Is the code open source?

Yes. Every program's code is on GitHub under the MIT and Apache 2.0 licences. You can read it, build it yourself and contribute.

What is GEO?

Generative Engine Optimization: making your content visible in AI answers from ChatGPT, Gemini, Perplexity and Google's AI Overviews. The programs show which AI crawlers read your pages, which AI assistants send you visitors and how search results look in the age of AI.

Do I need API keys?

No. Everything that runs on your computer is free. Search APIs are optional: connect your own keys, or use all of them with OctopusOn credits through one connection at my.octopuson.com.

Do I need to install every program?

No. Each program is a separate download; install only the ones you need. They share the same look and data formats.

Does my data leave my computer?

No. Everything is stored and analysed locally. The programs only contact the services you configure, such as search APIs or crawler IP lists.

Which systems are supported?

Windows 10 and 11, macOS 11 or newer (Apple Silicon and Intel) and current Linux distributions.

Pick a program and get your first report in minutes

Every program is free for Windows, macOS and Linux.

Download free