Just three years ago, doing SEO properly meant one of two things: giving up your evenings or signing an agency quote. For a small business, a freelancer or a law firm, the choice was easy. Most of the time, nothing got done.
In 2026, AI tools have changed the game. Not because they’re magic, but because they’re very good at the most expensive part of SEO: repetitive, meticulous work.
Spoiler: agencies aren’t going away. But their role is changing.
SEO is mostly execution
Look at a typical SEO engagement: the strategy takes a few days. The rest is execution:
- auditing hundreds of pages one by one;
- rewriting titles and meta descriptions;
- adding alt text to images;
- fixing redirects, duplicates and misfiled categories;
- rolling content out in several languages.
It’s slow, it’s tedious, and it’s exactly what AI does quickly and well.
What AI does as well as an agency
Technical audits. Connected to your site through your CMS or a crawler like Screaming Frog, an AI spots in minutes what would take a human days: empty pages, broken tags, duplicate content, images with no description.
Bulk work. Rewriting 300 meta descriptions, generating consistent alt text, reorganizing content: what used to take a week now takes an afternoon.
Multilingual sites. This may be the most dramatic gain. Translating, and above all adapting, a site into several languages used to be a huge expense. AI makes it affordable.
Assisted writing. Outlines, heading structure, FAQs, rewording: AI is an excellent starting point. As long as you proofread, and rewrite in your own voice.
A real example: ADD Avocat
I work with ADD Avocat, a French law firm based in Spain. Its audience: French people dealing with an inheritance, a divorce or a separation on the other side of the Pyrenees.
On a project like this, AI makes a real difference:
- structuring content around the questions clients actually ask (“how does inheritance work in Spain for French citizens?”);
- building a consistent French-Spanish bilingual site without doubling the budget;
- optimizing pages (titles, metas, internal linking) with the same rigor as an agency.
But what gives the content its value is the lawyer’s expertise. AI structures and speeds things up. The legal substance comes from a professional. And no tool replaces that.
What AI doesn’t do (yet)
It doesn’t know your business. It can optimize a page, but it doesn’t know which services pay, which clients you want to attract, or what sets you apart.
It executes… mistakes included. One bad instruction on a site with thousands of pages can do serious damage. Always validate before applying. I wrote about this in AI for SEO: the Swiss army knife that sometimes cuts the wrong way.
It doesn’t build your reputation. Backlinks, partnerships, authority: that’s still human work, built on relationships.
It doesn’t write for you. I tried to automate my blog with AI, and two months later I had zero articles published. Content that performs has a voice, a point of view and real experience behind it.
So, agency or AI?
Both, but not for the same things.
- Do the audit and basic fixes yourself, with AI. It’s fast and cheap.
- Keep your agency (or freelancer) budget for strategy: positioning, high-value content, link building.
- Always validate before executing. AI is a brilliant, tireless intern. But you’re the project manager.
Agencies selling generic audits should be worried. Those bringing strategy and expertise will be able to do more with less.
To get started, here’s where to begin an SEO project on an existing site without breaking everything, and the tools I use every day.
And you: how far have you gone in handing your SEO over to AI?