6 Best SEO Agencies in Denver (2026)

It runs a dedicated service page for generative engine optimization, separate from its traditional SEO page, covering ChatGPT, Google AI Overviews, Gemini, Perplexity and Grok. It also publishes a free GEO grader diagnostic tool.

You want an established Denver SEO shop that has built GEO into a distinct, productised service rather than an add-on.

• Separate, detailed GEO page listing query fan-out research, entity mapping, citation analysis and technical AI readiness audits
• Clutch Premier Verified with a 5.0 rating across 33 reviews
• Free GEO grader tool lets you test AI visibility before committing

• Clutch lists the team at 10 to 49 people, so very large enterprise programs may stretch capacity
• No pricing is published on the agency site itself

It runs a dedicated AI search optimization page built around a named framework aimed at earning citations in ChatGPT, Perplexity, Gemini and Google AI Overviews, with an AI visibility audit, entity authority work and citation tracking.

You want to work directly with senior specialists on search rather than through an account management layer.

• Most detailed AI search methodology of the six, with six named workstreams from audit through citation reporting
• Search-first agency operating since 2009, with SEO and paid search offered from the start
• Deliberately boutique at six specialists, so clients work directly with practitioners

• A six-person team limits capacity for large multi-brand or enterprise engagements
• Service mix is concentrated on search, so broader brand or lifecycle marketing would need another partner

Its homepage states that it implements modern systems spanning LMO, GEO and AEO to put a brand at the centre of AI answer ecosystems, and it runs a dedicated AI search optimization service page. It is one of the longest-operating agencies in the Denver market at more than 30 years.

You want a long-established Denver firm that treats AI search as an authority-building program rather than a tactical bolt-on.

• Operating since 1994, one of the longest-running agencies in the Denver metro
• Two physical Colorado offices rather than a remote-only footprint
• Explicitly names AEO and GEO as part of its AI search offering

• Clutch lists a 10,000 dollar project minimum, the highest of the Denver agencies here
• Its AI search page describes a proprietary framework rather than itemised deliverables, so scope needs defining in the sales conversation

Its AI SEO page defines both acronyms separately: GEO as optimization for AI platforms including ChatGPT, Gemini and Perplexity, and AEO as structured data, schema and voice-friendly content aimed at featured snippets and voice search. It is the only agency in this set that breaks out GEO and AEO as distinct, separately defined workstreams.

You want GEO and AEO written into the scope as clearly separate deliverables rather than bundled under a generic AI label.

• Clearest public definition of GEO versus AEO among the Denver agencies reviewed
• Offers a personalised AI SEO audit within 48 hours as an entry point
• Covers video and voice search alongside Google, Bing and generative platforms

• No founding year, team size or client names are published on its site, so track record is hard to gauge
• No verified third-party review profile was found, unlike the other five agencies here

Its solutions page lists generative engine optimization as a named service alongside search engine optimization, and describes deploying organic search and GEO tactics together with paid media. Named clients on its own site include several national franchise brands.

You run a franchise or multi-location business and need local search and GEO handled consistently across many markets.

• Operating since 1999 and the largest of these agencies, with Clutch listing 50 to 249 employees
• Names real franchise and multi-location clients publicly on its own site
• Proprietary platform for managing local marketing at scale

• Built around franchise and multi-location programs, so a single-location business is likely a poor fit
• Its site names GEO but publishes little detail on the methodology, and only four Clutch reviews are on file

Its services page states that from answer engine optimization services to paid media and demand generation it helps brands improve results, and it markets an SEO and AI visibility offering covering Google, ChatGPT, Perplexity, Gemini and Google AI Overviews. Client names published on its own about page include several national brands.

You need the website itself rebuilt or restructured as part of improving both search and AI answer visibility.

• Combines web design and development with search, useful when AI visibility problems are structural
• Publishes a recognisable client list on its own site
• Lowest Clutch hourly band of this group at 100 to 149 dollars

• Uses the AEO label but does not market GEO as a named service, so generative-engine scope should be confirmed upfront
• Only six Clutch reviews on file, a thinner track record than the older agencies here