Company lists · Data refreshed September 2026

Top 25 Startup SEO companies based in the United States

Name: Startup SEO companies based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 27, 2026 3,366 companies tracked

RevenueBase identified 3,366 startup SEO companies headquartered in the United States as of September 2026 and tracks 16,674 professional contacts across them, including 2,959 with verified work emails. New York is the largest hub.

This list covers startup SEO companies headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 27, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 27, 2026 86% judged on-target in blind review

3,366Companies

16,674Contacts tracked

2,959Verified emails

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The 25 largest startup SEO companies based in the United States

Ranked by team size

Top 25 of 3,366 startup SEO companies based in the United States, ranked by team size, largest first. Data refreshed Sep 27, 2026. RevenueBase Smart Search rates how each company's information relates to startup SEO companies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	SEO INC	Partial evidence	Carlsbad, CA, United StatesHQ checked Sep 27, 2026	n/a	825 contacts →
	Partial evidence “Since its inception in 1997, SEO Inc.” Source: RevenueBase Database · checked Sep 27, 2026
2	KPL Tech Solution Pvt. LTD	Indirect evidence	Middletown, DE, United StatesHQ checked Sep 27, 2026	201-500	390 contacts →
	Indirect evidence “Do you want to see your business on heights?” Source: RevenueBase Database · checked Sep 27, 2026
3	Boostability	Partial evidence	Lehi, UT, United StatesHQ checked Sep 27, 2026	201-500	326 contacts →
	Partial evidence “At Boostability, we're more than just an SEO company; we're your strategic partner in driving online growth.” Source: RevenueBase Database · checked Sep 27, 2026
4	Coalition Technologies	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 27, 2026	201-500	320 contacts →
	Partial evidence “Coalition Technologies is one of the leading SEO & web design agencies in the United States.” Source: RevenueBase Database · checked Sep 27, 2026
5	Mainstreethost	Indirect evidence	Amherst, NY, United StatesHQ checked Sep 27, 2026	51-200	128 contacts →
	Indirect evidence “Mainstreethost specializes in everything you need to have a successful online presence, including search engine optimization, paid search marketing, website design, social media…” Source: RevenueBase Database · checked Sep 27, 2026
6	SEOP	Partial evidence	Irvine, CA, United StatesHQ checked Sep 27, 2026	51-200	121 contacts →
	Partial evidence “SEOP is one of the leaders in the Search Engine Optimization industry and was co-founded by SEO experts that thrive on a combination of in-depth expertise and creative, forward…” Source: RevenueBase Database · checked Sep 27, 2026
7	Hennessey Digital	Partial evidence	North Hollywood, CA, United StatesHQ checked Sep 27, 2026	51-200	115 contacts →
	Partial evidence “Named to Fortune’s 50 Best Workplaces in Advertising & Marketing, Hennessey Digital is an award-winning digital marketing agency specializing in SEO for lawyers and other online…” Source: RevenueBase Database · checked Sep 27, 2026
8	Zoek Marketing	Indirect evidence	Irvine, CA, United StatesHQ checked Sep 27, 2026	201-500	108 contacts →
	Indirect evidence “As a business owner there are not many things that make you want to pull your hair out as much as figuring out how to gain new customers, phone calls, and visitors to your website.” Source: RevenueBase Database · checked Sep 27, 2026
9	Direct Online Marketing	Indirect evidence	Pittsburgh, PA, United StatesHQ checked Sep 27, 2026	11-50	89 contacts →
	Indirect evidence “Direct Online Marketing (DOM) is a digital marketing agency and Top 1% Premier Google Partner that has been helping businesses grow confidently online since 2006.” Source: RevenueBase Database · checked Sep 27, 2026
10	Seoprofy	Partial evidence	Orlando, FL, United StatesHQ checked Sep 27, 2026	51-200	89 contacts →
	Partial evidence “SeoProfy is your strategic SEO and AI visibility partner for organic and AI visibility that brings real ROI.” Source: RevenueBase Database · checked Sep 27, 2026
11	Paper Street Media	Indirect evidence	Miami, FL, United StatesHQ checked Sep 27, 2026	11-50	88 contacts →
	Indirect evidence “With more than a decade of experience Paper Street Media can help you leverage manpower and increase your capacity for marketing and web design projects.” Source: RevenueBase Database · checked Sep 27, 2026
12	BKA Content	Partial evidence	North Ogden, UT, United StatesHQ checked Sep 27, 2026	11-50	79 contacts →
	Partial evidence “BKA Content is an industry-leading SEO services and digital marketing company.” Source: RevenueBase Database · checked Sep 27, 2026
13	Fuel Online Digital Marketing Agency - SEO Company	Indirect evidence	Boston, MA, United StatesHQ checked Sep 27, 2026	51-200	79 contacts →
	Indirect evidence “Fuel Online is the definitive global authority in Generative Engine Optimization (GEO) and high-performance search strategy.” Source: RevenueBase Database · checked Sep 27, 2026
14	Victorious	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 27, 2026	51-200	77 contacts →
	Indirect evidence “Victorious is a San Francisco search agency.” Source: RevenueBase Database · checked Sep 27, 2026
15	Lawrank	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 27, 2026	51-200	75 contacts →
	Indirect evidence “LawRank™ was founded with one goal in mind – to get attorneys on Google’s first page.” Source: RevenueBase Database · checked Sep 27, 2026
16	Agreed Technologies	Indirect evidence	Newark, DE, United StatesHQ checked Sep 27, 2026	51-200	74 contacts →
	Indirect evidence “Agreed Technologies utilizes top marketing tools to get you results.” Source: RevenueBase Database · checked Sep 27, 2026
17	Avalaunch Media	Indirect evidence	Lehi, UT, United StatesHQ checked Sep 27, 2026	11-50	68 contacts →
	Indirect evidence “Avalaunch Media is a full-service digital marketing agency nestled at the foot of Utah’s Wasatch Mountains in the burgeoning tech hub known as Silicon Slopes.” Source: RevenueBase Database · checked Sep 27, 2026
18	HFB Technologies Website Design & SEO	Indirect evidence	St George, UT, United StatesHQ checked Sep 27, 2026	11-50	60 contacts →
	Indirect evidence “HFB Technologies is a premier business enhancement firm that’s specifically geared toward making businesses succeed.” Source: RevenueBase Database · checked Sep 27, 2026
19	Cyfrow Solutions	Indirect evidence	Austin, TX, United StatesHQ checked Sep 27, 2026	51-200	59 contacts →
	Indirect evidence “At Cyfrow Solutions, we specialize in helping businesses rise to the top of Google’s search results, and stay there.” Source: RevenueBase Database · checked Sep 27, 2026
20	Webimax	Indirect evidence	Marlton, NJ, United StatesHQ checked Sep 27, 2026	11-50	58 contacts →
	Indirect evidence “WebiMax was founded on CEO Kenneth Wisnefski’s core principle of truly helping clients as more of a strategic partner than merely an outsourced vendor.” Source: RevenueBase Database · checked Sep 27, 2026
21	On The Map, INC	Strong evidence	Miami, FL, United StatesHQ checked Sep 27, 2026	51-200	57 contacts →
	Strong evidence “On The Map is based in Miami and provides SEO, online marketing and website development services and marketing strategies to offer any size business.whether a start-up or Fortune…” Source: RevenueBase Database · checked Sep 27, 2026
22	Amicus Infotech	Partial evidence	- See Locations, United StatesHQ checked Sep 27, 2026	11-50	57 contacts →
	Partial evidence “Amicus is an award winning provider of SEO (Top SEOs Award), Social Media Development & Internet Marketing and a provider of high-end Web (Red Herring Award Award) & Mobile Design…” Source: RevenueBase Database · checked Sep 27, 2026
23	Bruce Clay, INC	Indirect evidence	Simi Valley, CA, United StatesHQ checked Sep 27, 2026	11-50	55 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 27, 2026
24	180 Marketing	Indirect evidence	Bend, OR, United StatesHQ checked Sep 27, 2026	11-50	54 contacts →
	Indirect evidence “180 Marketing has helped large and small online retailers increase revenues through effective search engine optimization campaigns utilizing specialized, proprietary methodologies.” Source: RevenueBase Database · checked Sep 27, 2026
25	PCG Digital	Indirect evidence	Manasquan, NJ, United StatesHQ checked Sep 27, 2026	11-50	51 contacts →
	Indirect evidence “At PCG, we pride ourselves on the relationships we have built with our clients.” Source: RevenueBase Database · checked Sep 27, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: startup SEO companies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names startup SEO companies.
Partial evidence: Its own public description names part of startup SEO companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name startup SEO companies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 3,366 startup SEO companies based in the United States

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Startup SEO companies based in the United States at a glance

As of Sep 27, 2026

17.7%Verified-email coverage

5.0Average contacts per company

1-10Median size (employees)

3.4%Largest-city concentration · New York

Sep 27, 2026Page data refreshed

Companies by employee count

1-10

2,543

11-50

691

51-200

201-500

501-1,000

10001+

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 3,366 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among startup SEO companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United States whose own description of what they do matches “startup SEO companies”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names startup SEO companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among startup SEO companies, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 2,959 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 27, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Startup SEO companies by metro

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names startup SEO companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many startup SEO companies are there based in the United States?

RevenueBase identified 3,366 startup SEO companies headquartered in the United States as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

SEO INC, headquartered in Carlsbad, tops this list with the largest team on record.

Which city has the most startup SEO companies?

New York leads with 116 headquartered companies, followed by Los Angeles (101) and Houston (65).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 2,959 verified decision-maker contacts tracked across these 3,366 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 27, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.