GEO vs SEO: what's the difference in 2026 (and why you need both)

For 20 years, "being visible online" meant one thing: showing up on Google. That's no longer true. A growing share of your customers now ask their questions to ChatGPT, Gemini or Perplexity — and those engines don't work like Google.

What is SEO?

SEO (Search Engine Optimization) covers everything that helps your site appear in Google's results: quality content, relevant keywords, a fast and well-structured site, and inbound links (backlinks) that prove your credibility. When someone types "plumber Lyon", SEO decides whether you're on page one… or page three.

What is GEO?

GEO (Generative Engine Optimization) is the equivalent for AI engines. When a user asks ChatGPT "who's the best plumber in Lyon?", the AI doesn't return a list of links: it directly recommends one or two brands. GEO is about making sure it's yours — by publishing content the AI engines understand and cite, and by building the brand authority that makes them trust you.

The key differences

	SEO (Google)	GEO (ChatGPT, Gemini…)
The result	A ranked list of links	A direct answer citing 1–3 brands
The click	The user clicks through to your site	The user reads the answer — being cited is the goal
What matters	Keywords, backlinks, technical health	Clear structured content, authority, mentions
The competition	Saturated for 15 years	Nearly empty — most businesses are absent

Do you have to choose? No — they reinforce each other

Good news: the work overlaps heavily. Well-written content, structured around the real questions your customers ask, helps you both rank better on Google and get cited by the AI engines. Generative engines partly rely on the same signals as Google (quality, authority, freshness). Investing in content feeds both channels at once.

The difference is timing. SEO is a race that started 15 years ago, where you arrive after everyone else. GEO is a race that's just beginning: the vast majority of businesses are still invisible to AI. It's a window — like SEO was in 2010.

Where to start (for a small or mid-sized business)

1. Test your situation. Ask ChatGPT and Gemini to recommend companies in your industry and your area. Does your brand show up?
2. Publish useful, regular content that answers your customers' questions — it's the raw material of both channels.
3. Build your authority (mentions, backlinks, a consistent presence) so that Google and the AI engines treat you as a reference.
4. Measure. Track your Google impressions and your presence in AI answers, month after month.

Also read: Why ChatGPT doesn't recommend your business (and how to change that)