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Top SEO Companies Denver, CO

businesses screened
485
qualified
68
listed
3

Denver has hundreds of businesses calling themselves SEO agencies, and many Denver addresses turn out to be mailbox suites, virtual offices or teams overseas. This list comes from a review of the SEO agencies we could find in the Denver metro: what they publish, what they’ve proven, what clients say, and how they rank for their own city.

The short answer For local service businesses, start with Epidemic Marketing. For established mid-size organizations, Webolutions. For B2B and consumer brands, V9 Digital.

Read all three →

Reviewed by Andrew Eagar, fractional SEO · Reviewed · Next review January 2027

No agency paid to be listed or can pay to change its position. I run a fractional SEO practice, which some businesses hire instead of an agency, so I don't rank myself here. How we reviewed

Side by side

Compare Denver’s top SEO agencies

AgencyBest forStarting priceSEO case studiesGoogle ratingMedian tenureContract
Epidemic Marketing Home services, local businesses Not published Several 5.0 (72) 13.8 yrs Not published
Webolutions Healthcare, manufacturing, associations Not published Several 4.7 (30) 9.8 yrs Not published
V9 Digital B2B, consumer and multi-location brands $3,500/mo Several Not published 3.8 yrs Not published

Prices and terms as published on each agency's site, October 2026. Tenure is the median from LinkedIn company data.

The three

The three agencies, reviewed

Top pickBest for local service businesses

Epidemic Marketing

5.0 on Google (72) · 5.0 on Clutch (3) · Speer Blvd · Founded 2009

Why we picked them

  • Top 10 for 12 of 12 Denver SEO searches we checked, more than any other qualified agency.
  • 72 Google reviews at 5.0, eleven of them from the past year, many citing traffic, leads and rankings.
  • Dated case studies, e.g. a tree service's organic clicks up 16% to 11.8K in January to June 2026 against the prior period.

What clients say

Reviewers most often credit them with more traffic, leads and rankings, and praise the team's responsiveness. We started seeing more traffic and better leads pretty quickly. — Fon J., Google, 2026

Watch-outs

It calls itself "Denver's #1 SEO" agency, and its "award winning" claim rests on UpCity badges. All three Clutch reviews arrived within three days in July 2025. No published prices or contract terms, and only the founder is named on the site.

2 · Established mid-size organizations

Webolutions

4.7 on Google (30) · 4.8 on Clutch (10) · Greenwood Village (flexible workspace) · Founded 1994

Why we picked them

  • Dated, multi-year case studies, e.g. a cardiology practice's January organic visits up from 5,440 in 2016 to 89,896 in 2023.
  • A long-serving team: founded in 1994, 21 on LinkedIn with a median tenure of 9.8 years.
  • Named in 7 of 15 AI-assistant answers we tested, and 30 Google reviews at 4.7.

What clients say

Reviewers praise website rebuilds and long relationships, and several credit them with gains in search visibility. We've seen strong gains in search visibility, organic traffic, and overall website performance. — Terra S., Google, 2026

Watch-outs

Its main address is a Venture X flexible workspace in Greenwood Village. Published prices are multi-channel ranges from $4,000 a month, not an SEO plan. LinkedIn headcount is down about 12% in two years, and most reviews are about websites.

3 · B2B and consumer brands

V9 Digital

5.0 on Clutch (33) · Downtown (mailing address) · 25 on LinkedIn

Why we picked them

  • Named in 8 of 15 AI-assistant answers we tested, more than any other qualified agency.
  • 33 Clutch reviews at 5.0; one law-firm client reports new SEO users up 121% in 2024.
  • Published average retainers of $3,500 to $15,000 a month, and 14 staff named on its site.

What clients say

Clutch reviewers praise on-time delivery and responsiveness across SEO, social media and ads work. Volume Nine brought a high level of technical expertise and personal attention to the project. — Joe W., Clutch, 2024

Watch-outs

The site gives a downtown mailing address only, and its Google listing is unclaimed with no reviews. It publishes a "15 Best SEO Companies in Denver" list that ranks itself first. Case-study figures are percentages without starting numbers or dates.

Free agency audit

Not sure your agency is earning its retainer?

I've spent years inside SEO agencies, so I know where the hours go and where they don't. Give me read-only access and your last three reports, and I'll grade the work against what you were promised: what shipped, what it earned, and what's missing.

You'll get a one-page scorecard and a 30-minute call with a straight answer: keep, fix or replace. If they're not delivering, I'll show you what fractional SEO would look like instead.

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Choosing an agency instead? Send me the proposals and I'll tell you which one I'd sign.

Sample scorecard
Scope vs. delivery
B
Results vs. spend
C
Work quality
C
Reporting
D
Ownership and risk
A

Verdict: Fix

Illustrative example, not a real client.

First-party data

The Denver SEO market in numbers

21%
publish their pricing
44%
show SEO case studies with real numbers
10%
rank top 10 for their own Denver searches
13 of 68
get named by AI assistants for Denver SEO
Published SEO prices start at a median of $837 a month Lowest published monthly SEO plan, for the 14 of 68 qualified agencies that publish one

Teal: agencies on this list. Grey: other qualified Denver agencies (not named).

About one in five of Denver's 68 qualified agencies publishes a monthly price. Just seven rank in the top 10 for their own Denver SEO searches.

Before you sign

What we saw that you should watch for

None of these rules an agency out on its own, but each is worth a question before you sign.

  • "Denver" addresses that are mailboxes At least 33 Denver SEO listings we screened gave mailbox suites or virtual-office addresses, and several belong to firms run from India, Pakistan or Singapore. Ask where the people doing your work are based.
  • Bought and sold links At least 11 agencies we screened sell backlinks, guest posts or "link inserts", and two more endorse a link marketplace. Paid links break Google's guidelines; ask how links are earned.
  • Ranking guarantees Four agencies we screened guarantee rankings, one promising a refund if you aren't in Google's top 3 within 12 months. Nobody controls Google's rankings; treat promises like this as a red flag.
  • "#1 in Denver" and self-ranking lists Several Denver agencies call themselves the city's #1 or publish "best SEO companies in Denver" lists that rank themselves first. Check who wrote a list, this one included.
  • AI answers aren't a vetting The agency AI assistants named most often for Denver failed our screen for selling guest posts and link inserts. Check any AI recommendation the way you would any other.
  • National firms with a Denver page At least 7 of the 24 firms in the top 10 for the Denver SEO searches we checked are national companies with a city landing page. That isn't wrong, but don't assume local knowledge.
  • Review drives Several agencies we reviewed collected a burst of reviews within a few days or weeks. Read what reviews describe and when they were written, not just the average.

Method

How we reviewed

Every agency went through the same three rounds, each looking harder at fewer agencies.

  1. Screen. Names SEO as a service, has a Denver-area office, active in the last 12 months, names real people, has client reviews. Guaranteed rankings or paid link schemes rule an agency out.
  2. Qualify. Proof of results, rankings for their own Denver searches, reputation, transparency, SEO depth and awards.
  3. Deep dive. For the top 10: review text, team stability on LinkedIn, and 15 AI-assistant answers.

No agency paid to be included, and none was contacted. We re-check each quarter. Send a correction · Full methodology

Three of 485 made the list

Found in Denver485

Offer SEO232

Passed the screen68

Deep-dive finalists13

Listed3

FAQ

Questions, answered

How much does an SEO company cost in Denver?

Among agencies that publish a price, monthly SEO plans start between $100 and $3,500, with a median of about $800. Most agencies quote after a call.

How do I choose an SEO agency in Denver?

Ask for case studies with real numbers from businesses like yours, the contract length and exit terms, and who will do the work. Check whether the team is actually in Denver.

Do I need a Denver-based SEO company?

Not necessarily, but many firms that claim a Denver address use a mailbox or work elsewhere. If local knowledge matters to you, confirm where the team is.

Is SEO still worth it with AI search?

Yes. In our tests, the qualified Denver agencies AI assistants named most were also among the few that rank in the top 10 for their own city.

Is hiring an agency my only option?

No. Many businesses hire a fractional SEO instead: one senior specialist working directly on the account, with less overhead.

Photo of Andrew Eagar

About the reviewer

Andrew Eagar

Andrew Eagar has worked in SEO since 2008. He has been Director of SEO at four agencies, built SEO departments from the ground up and led teams of more than 20 SEOs, on brands including Twitter, Amazon, S&P Global, PGA Tour, Allstate and Seagate. He has contributed to Moz and Clutch, and today runs The Fractional SEO in Virginia. LinkedIn