Contents5
Published ranges, sources included
Few agencies publish their prices. Two French sources publish recent, usable figures, and they converge. To place ours within those ranges, they are public: SEO audit from €1,500 to €3,000 and SEO and GEO engine from €4,500 to set up, excluding VAT.
The 2026 grid published by Deux.io gives, depending on the profile of the business and its site:
per month for a very small business in a local market, with a site of under 50 pages
per month for an SME in a national market, with a site of 50 to 500 pages
per month for an e-commerce site or a large site
per month for a large company in a highly competitive sector
For one-off work, the same source places a basic automated audit between 300 and 800 EUR, a full SME audit between 1,500 and 3,500 EUR, and an e-commerce audit between 4,000 and 10,000 EUR. Daily rates range from 300 to 500 EUR for junior profiles up to 850 to 1,500 EUR for seniors.
Deux.io also cites the 12 engagements with very small businesses and SMEs that Studio à Table tracked between 2024 and 2026: their monthly budget shows a median of 980 EUR before tax for a full retainer. Studio à Table has since rewritten its own page, which places an agency retainer of six months or more between 800 and 1,700 EUR per month before tax, based on 683 SEO project budgets collected by La Fabrique du Net.
What actually moves the bill
Four factors explain most of the spread, and a good quote names them:
- Scope: number of pages, number of languages, and whether the technical foundation is sound or needs repair first.
- How contested your queries are: ranking for an uncontested local query and for “car insurance” is not the same work, nor the same timeline.
- The production share: how much content per month, to which standard, reviewed by whom.
- What is actually included: technical work, content, internal linking, rank tracking, and increasingly visibility in generative engines (being cited by ChatGPT or Perplexity), which builds on the same foundations.
What AI changes in the math, and what it does not
In two years, the cost of producing text has collapsed: at the public 2026 model rates, generating 1,000 words costs a few cents of compute. Where agencies used to bill writing by the piece (80 to 800 EUR per article depending on the level, in the grid cited above), that part of the quote has changed in nature.
What AI does not change: strategy (picking the right targets), fact-checking, expert review, technical work, and the responsibility for what gets published under your brand. Unreviewed generated content can state false things with total confidence.
From the field
Nothing gets published without human review
We once had to urgently unpublish an article whose examples the model had invented, and that lesson founded our rule.
Hence the two symmetrical quote traps of 2026:
- The unchanged quote, old-world production: you are billed hand-written prices for content generated in minutes. Ask for the budget split between production, review, technical work and strategy.
- The rock-bottom quote, no review: dozens of generated pages for almost nothing, with no verification pipeline. That is exactly the content Google and generative engines are learning to discard, and the cleanup gets paid for later.
To tell an agency that has genuinely industrialised its work from one that merely added “AI” to its homepage, we detailed the 5 questions to ask an AI SEO agency in a dedicated article.
How to read an SEO quote in 2026
Check a quote against five points:
- Scope.
Demand the scope in numbers: pages, languages, content per month, and who reviews.
- Reversibility.
Ask what stays with you if you stop: content, access, tracking data. Reversibility is checked before signing, not after.
- Milestones.
Be wary of 12-month commitments without exit milestones: a provider confident in its work accepts checkpoints.
- Measurement.
Ask how results will be measured: in your own Search Console, on your target queries, not in a proprietary report.
- Verification.
At equal budget, compare what is produced AND verified: ten expert-reviewed pages beat fifty unchecked generated ones.
On transparency, we practice what we preach: the prices of our own services are published on this site, with a closed scope and a stated amount, from the SEO audit to the SEO and GEO engine. In our view that is the first test of a healthy relationship with any provider, in SEO as elsewhere.
Frequently asked questions
How much does an SEO agency cost per month for an SME?
Published grids converge on 600 to 1,500 EUR per month for a very small business and 1,500 to 3,500 EUR for an SME, with an observed median close to 1,000 EUR before tax on real engagements with small and medium businesses. Sources are linked above.
Is a one-off audit enough?
It answers “where do we stand and what to do first”, not “who does it over time”. It is an excellent entry point at a controlled budget (300 to 3,500 EUR for most cases), provided the action plan can be executed without depending on the auditor alone.
Is SEO cheaper thanks to AI?
Production, yes, clearly. The full retainer, not mechanically: value shifts to strategy, review and technical work. A price that drops somewhat while standards rise is a good signal; a price that collapses without review is not. Ask how the budget splits between production and review.
How long before results show?
In organic search the unit of time remains the month, and the first measurable effects usually take several months, depending on the site’s starting point and the competition. Any promise of precise results within weeks should raise suspicion. Agree upfront on how progress will be measured, in your own Search Console.
Sources
- Deux.io (new tab)deux.io
- Its own page (new tab)studioatable.fr
Jim · founder of Brain Plus AI
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