GEO and SEO are often presented as rivals. They're not. They're two different jobs that share a lot of infrastructure, and most B2B SaaS teams need to do both - just not in equal measure, and not with the same tactics.
What is SEO?
Search engine optimisation is the practice of making web pages rank in search engine results pages (SERPs), primarily Google. The unit of success is a click on a blue link.
What is GEO?
Generative engine optimisation is the practice of making your brand, product and claims appear inside the answers generated by AI assistants - ChatGPT, Perplexity, Claude, Gemini and Google's AI Overviews. The unit of success is a citation, a mention or a recommendation inside the generated answer. The user often never visits your site.
How is GEO different from SEO?
The biggest difference is what gets ranked. SEO ranks pages. GEO ranks claims. An AI model doesn't pick "the best page on pricing strategy" and link to it - it composes an answer from extracted passages across many sources. To win in GEO, you need pages that contain clean, stand-alone, attributable claims, not just pages that rank.
The second difference is authority. SEO authority is largely a function of backlinks. GEO authority is closer to PR: third-party reviews, listicles, podcast mentions, Reddit threads and G2 entries carry as much weight as a backlink, sometimes more. If a page on your site is the only place your product is mentioned, AI tools have nothing to corroborate.
Where do GEO and SEO overlap?
Most of the technical layer is shared. Crawlability, server-side rendering, sitemaps, fast TTFB and clean HTML are required for both. Schema markup helps both. Quality content with a real author helps both. If your SEO foundations are solid, you've already done most of the technical work for GEO.
What changes is what you write and how you earn external signal. See on-site optimisation for GEO for the on-page side, and off-site authority for GEO for the external side.
Do I still need SEO if I'm doing GEO?
Yes. Search is not disappearing. Google still drives the majority of B2B research traffic for most SaaS categories, and pages that rank in Google are disproportionately likely to be cited by AI tools - because AI tools lean heavily on the top of the SERP when constructing answers.
The right mental model: GEO and SEO compound. A page that ranks well on Google is more likely to be quoted by ChatGPT. A page that is well-structured for AI citation is more likely to earn featured snippets and AI Overviews placement.
How should B2B SaaS teams split their time?
A practical starting split for a small B2B SaaS team in 2026:
- 50% on content that serves both - genuinely useful guides, comparison pages, product pages with clear positioning and FAQs.
- 25% on technical hygiene that serves both - schema, crawlability, internal linking.
- 25% on off-site authority that disproportionately helps GEO - getting on G2 and Capterra, earning listicle inclusions, building a Reddit and LinkedIn presence.
You'll notice almost nothing in that split is GEO-only or SEO-only. That's the point.
When does GEO matter more than SEO?
GEO matters disproportionately when your buyer's research starts in an AI tool rather than Google - which is increasingly common for technical and senior buyers. If your ideal customer is a CTO, a head of data or a lead engineer, assume they're asking ChatGPT or Claude before they ever open a Google tab.
For more on getting started, read what is GEO or jump straight to the first week in GEO.