People search for the best SEO agencies, the top SEO companies in the USA and SEO firms. There is no single answer, because the right agency depends on your site, your market and your budget. What you can check is how many verified reviews an agency has, how big its team is, and what its work consists of.
Use the table as a starting point for a shortlist of three, then ask each for examples like your site and a plan you can read.
How we made this list of SEO companies in the USA
Most lists of SEO agencies rely on the agency's own claims. We used a short set of checks that anyone can repeat on Clutch:
- A US headquarters as listed on Clutch.
- At least 30 reviews and a rating of 4.5 or higher. Review count is shown next to every score, because a perfect rating from one client says little.
- SEO as the largest single service share on the agency's profile.
- A spread of sizes, from 10 to 49 people up to 250 to 999, so there is a fit for small and large buyers.
We did not use awards, press mentions or the agency's own client lists. Clutch's team bands and service shares are what the agencies reported, and Clutch checks business registration and not results.
The best SEO agencies in the USA: an honest answer
Readers ask for the best SEO agencies, the best SEO companies in the USA, the top-ranked and highest-ranked SEO companies, and the leading and biggest SEO firms. We do not rank agencies, because the facts we can check do not name one winner. They do show where agencies differ:
- Most reviews: WebFX with 454 on Clutch, then SmartSites with 370 and Ignite Visibility with 175.
- Highest rating: Titan Growth at 5.0 from 34 reviews, then WebFX, SmartSites, SeoProfy and SEO Brand at 4.9. A higher score from fewer reviews says less.
- Most SEO-focused mix: Victorious reports SEO as 75% of its work, with SEO Brand, SeoProfy and Straight North at 70%.
- Smallest team: SEO Inc. lists 10 to 49 people. The largest bands, 250 to 999, are WebFX, SmartSites and Ignite Visibility.
- Longest in business: WebFX lists 1995, and SEO Inc. and Straight North list 1997.
So the best fit for you is the agency that suits your site, your budget and your need for attention, and can show proof. Highest rated SEO companies and top SEO agencies are starting points and not answers. Many agencies also call themselves award-winning. We did not use awards, because they are the agency's own claims and the criteria are rarely public.
Ignite Visibility
Clutch rates Ignite Visibility 4.8 out of 5 from 175 reviews. It lists a San Diego, California headquarters, a 2013 founding year and a team band of 250 to 999. SEO is about 30% of its service mix, with advertising, email, pay-per-click, social media, web design and web development at about 10% each. Ask which of those teams works on your account.
SEO Brand
Clutch rates SEO Brand 4.9 from 109 reviews. It lists a Boca Raton, Florida headquarters, a 2006 founding year and a team band of 50 to 249. SEO is 70% of its mix, with content, pay-per-click and web development at 10% each, and its industry mix is spread across retail, finance, e-commerce, hospitality, manufacturing and others.
SeoProfy
Clutch rates SeoProfy 4.9 from 99 reviews. It lists an Orlando, Florida headquarters, a 2012 founding year and a team band of 50 to 249. SEO is 70% of its mix. Its industry focus is unusual: gambling is 30% and e-commerce 20% of what it reported. Ask whether it has worked in your industry.
SEO Inc.
Clutch rates SEO Inc. 4.7 from 34 reviews. It lists a Mt. Juliet, Tennessee headquarters, a 1997 founding year and a team band of 10 to 49. SEO is 60% of its mix, with pay-per-click at 25% and conversion optimization at 10%. It is the smallest team here, so ask about capacity and who handles your account.
SmartSites
Clutch rates SmartSites 4.9 from 370 reviews, and lists a Paramus, New Jersey headquarters, a 2011 founding year, 15 US locations and a team band of 250 to 999. SEO is about 50% of its mix and pay-per-click about 30%. Ask for examples in your industry and the share of the team that does SEO.
Straight North
Clutch rates Straight North 4.7 from 142 reviews. It lists a Chicago, Illinois headquarters with a second location in Charlotte, North Carolina, a 1997 founding year and a team band of 50 to 249. SEO is 70% of its mix, with pay-per-click at 10% and content, social media, web design and web development at 5% each. Its industry mix is wide, from business services and finance to manufacturing and home services.
Titan Growth
Clutch rates Titan Growth 5.0 from 34 reviews. It lists a San Diego, California headquarters, a 2004 founding year and a team band of 50 to 249. SEO is 60% of its mix, with pay-per-click at 20% and content and web design at 10% each. The review base is small for a perfect score, so read the individual reviews.
Victorious
Clutch rates Victorious 4.8 from 119 reviews. It lists a San Francisco, California headquarters, a 2013 founding year and a team band of 50 to 249. SEO is 75% of its mix, with content marketing at 20% and web development at 5%, so it is the most SEO-focused agency in this list.
WebFX
Clutch rates WebFX 4.9 from 454 reviews, the most of the nine. It lists a Harrisburg, Pennsylvania headquarters, a 1995 founding year and a team band of 250 to 999. SEO is 60% of its mix, with AI consulting, advertising and pay-per-click at 10% each. At that size, a team is assigned to you. Ask who will do the work and how much senior time the account gets.
SEO agency, SEO company, SEO provider or SEO consultant: what is the difference?
The words overlap, and buyers in the United States and America at large use them as one. SEO providers and SEO service providers is the general term. An SEO agency or SEO company gives you a team. An SEO consultant advises, and may not do the work. A search engine optimisation firm (the UK spelling) is the same thing as an SEO firm. An SEO management company usually runs the whole program for a monthly fee.
Ask whichever kind you hire to say, in writing, what it will do, who will do it and how you will see the result. For a software company or an online store, add that you want examples in your industry.
What separates these agencies
- Review depth. Counts run from 34 to 454, and the score means more as the count grows. Read recent reviews and their sub-scores.
- Size. A large agency has more specialists. A smaller one may give you more senior attention. Neither is better in every case.
- Mix of services. Most are SEO-led, with different shares of paid search, content and web work. Check that the mix matches your need.
- Industry experience. Some report a narrow industry focus and others a wide spread. Ask for work in your sector.
How to choose an SEO agency in the USA
Work through these before you sign:
- Ask for case studies that fit. Look for your industry, your size and your kind of site.
- Ask how success is measured. Rankings and traffic are not results. Ask whether reports connect to leads or sales that you can check in your own accounts.
- Ask who does the work. Find out whether the people on the pitch are the people on your account.
- Read the contract. Watch for long lock-ins and for terms with no way out.
- Be careful with promises. No one can promise a top ranking, and an agency that does is selling something it cannot deliver.
- Check the plan. A written, itemized plan with what is and is not included is easier to compare than one total.
SEO services in the USA: what you are buying
Most agencies sell a mix of these, in different proportions: technical fixes that help search engines read your site, pages and content built around what buyers search for, mentions and links from other sites, local search work for businesses with a real address, and reports. Our SEO services page explains how we plan each part. If you need SEO done behind your own agency, see our white label SEO page. For a SaaS SEO agency in the USA, see our SaaS marketing page, and for B2B SEO services and a B2B SEO company, see our B2B SEO page.
A note about us, and how this guide was made
This guide is published by PromotEdge International, an international strategy, technology, marketing and design company. We sell SEO, so we compete with agencies on this list, and for that reason we are not in it and hold no place in it. Our delivery team is in India. No agency paid for a place here.
If you want to compare us with these agencies, our SEO page says what we do, how we report and who does the work.
Facts we rely on: see our company facts for what we state about ourselves and where each fact comes from.