A GEO agency gets a brand cited inside AI-generated answers on ChatGPT, Claude, Gemini, Google AI Mode, and Perplexity. An SEO agency gets a brand ranked on Google's results page. The two solve different problems with different workflows. This guide compares what each delivers, what each costs, and which one to hire first.
What's the Difference Between a GEO Agency and an SEO Agency?
An SEO agency measures success by ranking position, usually a spot in the top 10 for a target keyword on Google. A GEO agency measures success differently: whether an AI system names the brand inside a generated answer. That holds whether or not the answer includes a clickable link.
The two run different playbooks because they optimize for different systems. SEO targets a ranking algorithm built on keywords, backlinks, and technical site health. GEO targets a language model that retrieves passages of text and decides which brand to name in its response. According to Ahrefs, the #1 Google result loses 58% of its clicks once an AI Overview appears above it. The study tracked 300,000 keywords from December 2023 to December 2025. Ranking first no longer guarantees the click an SEO agency was built to win. For the discipline-level comparison behind these two agency types, see AEO vs SEO: key differences.
What Each Type of Agency Actually Delivers
An SEO agency runs keyword research, technical audits, link building, and rank tracking, all aimed at moving a URL up a results page. A GEO agency runs citation monitoring across AI platforms, answer-first content production, technical fixes for AI crawler access, and entity consistency work.
Third-party sources drive most AI citations, not brand-owned pages. According to a 2025 University of Toronto study (Chen et al., arXiv:2509.08919), earned third-party coverage accounts for 63 to 95% of citations across LLMs. An agency that only edits a brand's own website is optimizing for a minority of what an AI model actually reads before answering.
GEO Agency vs SEO Agency: Side by Side
The two disciplines differ on four things: what they measure, how they work, what they cost, and what a brand loses by skipping one. Cost is where the gap is widest, because GEO pricing spans a range that SEO retainers do not.
| SEO Agency | GEO Agency | |
|---|---|---|
| Measures success by | Ranking position on Google | Brand named inside an AI-generated answer |
| Primary workflow | Keyword research, backlinks, technical audits, rank tracking | Citation monitoring, answer-first content, AI crawler access, entity consistency |
| Typical monthly cost | $3,209 on average | $2,000 to $12,000 depending on scope; OmniGro $1,500 to $5,000 |
| What's missing without it | Rankings stall, organic traffic plateaus | Brand stays invisible in AI answers even while ranking well on Google |
According to Ahrefs' 2024 SEO pricing survey of 439 providers, agencies averaged $3,209 a month, the most recent figure available. According to First Page Sage's November 2025 GEO cost breakdown, entry GEO packages run $2,000 to $3,000 for placement work alone, with no content production. The top tier runs $8,000 to $12,000 and adds content, reputation management, and PR. OmniGro covers monitoring, content, technical work, and competitor intelligence from $1,500 to $5,000 a month.
When SEO Alone Stops Being Enough
SEO alone stops being enough once the AI channel starts outperforming the one SEO feeds. According to Adobe Analytics, AI-referred ecommerce traffic converted 31 to 42% higher than non-AI traffic across the 2025 holiday season and Q1 2026.
A brand can rank on page one of Google and still be absent from every AI answer to the same query. Strong backlinks and a fast site help SEO, but neither guarantees a citation inside a ChatGPT response.
Do You Need a GEO Agency, an SEO Agency, or Both?
Most ecommerce brands need both, run as separate workflows rather than one bolted onto the other. GEO complements SEO; it does not replace it. Which one to hire first depends on where the gap actually sits, not on budget order or agency preference.
Two questions decide that order. Are key pages unindexed or not ranking at all? Start with SEO, because an AI model cannot cite what it cannot retrieve. Does the brand already rank top three on Google for its category terms but stay unnamed in the AI answer to the same query? Start with GEO, since the ranking problem is already solved and the citation problem is not. Either way, fix the technical layer first: unblocking GPTBot and ClaudeBot, server-side rendering, and schema markup pay back on both sides at once.
Some agencies offer both under one engagement. Before signing with any GEO agency, evaluate measurement infrastructure, content capability, and technical depth. For how the two disciplines fit together at a strategic level, see GEO vs SEO: key differences.
OmniGro runs SEO and GEO together for brands that want both handled by one team. Its Brand Visibility Audit shows where a brand stands in AI answers before any engagement starts.
FAQs
Can one agency handle both SEO and GEO?
Some agencies do, though few cover both with real depth in each. Ask for a citation report and a ranking report separately. If an agency can only produce one, it is not covering both disciplines.
Does ranking well on Google mean I don't need GEO?
No. A search index and an AI model's citation logic pull from different signals. Most AI citations come from third-party sources rather than a brand's own ranked pages. A top Google position and an AI citation are two separate things to win.
How much does a GEO agency cost compared to an SEO agency?
SEO agencies averaged $3,209 a month as of the last Ahrefs survey. GEO pricing runs $2,000 to $12,000 a month, and the tier decides the scope. Entry packages buy placement only; the top tier adds content and PR. OmniGro sits below the entry tier at $1,500 to $5,000 a month and includes content from the start.
How fast do results come in from each?
SEO results build gradually as a ranking and content profile compounds over months. OmniGro's own GEO pilots show initial citation lift within 2 to 3 weeks, with a full results report by week 5. The Three Squared Nine case study documents one engagement end to end, from invisible to named across four AI engines.
Should I hire a GEO agency before or after my SEO is in place?
Whichever discipline matches the actual gap goes first, as the previous section covers. Once that starting point is set, the two can run in parallel on separate budget lines. Neither has to wait for the other's contract to end.
Conclusion
Start with whichever gap is real: pages that don't rank, or pages that rank but never get cited. See how to choose a generative engine optimization agency for the evaluation questions to ask before hiring one. Or get a free AI visibility assessment to see where your brand stands today.