Company lists · Data refreshed September 2026

Top 25 Search marketing automation platforms based in the United States

Name: Search marketing automation platforms based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 29, 2026 3,422 companies tracked

RevenueBase identified 3,422 search marketing automation platforms headquartered in the United States as of September 2026 and tracks 66,681 professional contacts across them, including 23,021 with verified work emails. New York is the largest hub.

This list covers search marketing automation platforms 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 29, 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 29, 2026 86% judged on-target in blind review

3,422Companies

66,681Contacts tracked

23,021Verified emails

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The 25 largest search marketing automation platforms based in the United States

Ranked by team size

Top 25 of 3,422 search marketing automation platforms based in the United States, ranked by team size, largest first. Data refreshed Sep 29, 2026. RevenueBase Smart Search rates how each company's information relates to search marketing automation platforms: 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	HIBU	Partial evidence	Cedar Rapids, IA, United StatesHQ checked Sep 29, 2026	1,001-5,000	4,426 contacts →
	Partial evidence “Hibu is a leading provider of technology-driven, integrated digital marketing solutions for America’s local businesses, trusted by tens of thousands of local business owners.” Source: RevenueBase Database · checked Sep 29, 2026
2	Zeta Global	Partial evidence	New York, NY, United StatesHQ checked Sep 29, 2026	1,001-5,000	2,595 contacts →
	Partial evidence “At Zeta Global (NYSE: ZETA), we help enterprise brands and agencies Achieve the Impossible™ with superintelligent marketing.” Source: RevenueBase Database · checked Sep 29, 2026
3	Constant Contact	Partial evidence	Waltham, MA, United StatesHQ checked Sep 29, 2026	1,001-5,000	1,611 contacts →
	Partial evidence “We deliver for small businesses with powerful tools to simplify and amplify digital marketing.” Source: RevenueBase Database · checked Sep 29, 2026
4	Optimizely	Strong evidence	New York, United StatesHQ checked Sep 29, 2026	1,001-5,000	1,584 contacts →
	Strong evidence “Optimizely is the AI platform for marketing, built for the experience-makers who shape how brands show up in the world.” Source: RevenueBase Database · checked Sep 29, 2026
5	Localiq	Partial evidence	New York, NY, United StatesHQ checked Sep 29, 2026	1,001-5,000	1,534 contacts →
	Partial evidence “Grow your business with digital marketing powered by AI and local expertise.” Source: RevenueBase Database · checked Sep 29, 2026
6	Appsflyer	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 29, 2026	1,001-5,000	1,516 contacts →
	Partial evidence “AppsFlyer is the Modern Marketing Cloud that helps businesses transform complex data into clarity and growth.” Source: RevenueBase Database · checked Sep 29, 2026
7	Intuit Mailchimp	Partial evidence	Atlanta, GA, United StatesHQ checked Sep 29, 2026	1,001-5,000	1,483 contacts →
	Partial evidence “The Mailchimpossibilities are endless when you create, automate, and optimize your marketing with Mailchimp.” Source: RevenueBase Database · checked Sep 29, 2026
8	Birdeye	Strong evidence	Palo Alto, CA, United StatesHQ checked Sep 29, 2026	1,001-5,000	1,343 contacts →
	Strong evidence “Birdeye is the #1 Agentic Marketing Platform for Multi-location Brands, purpose-built for multi-location brands.” Source: RevenueBase Database · checked Sep 29, 2026
9	Pubmatic	Indirect evidence	Redwood City, CA, United StatesHQ checked Sep 29, 2026	501-1,000	1,297 contacts →
	Indirect evidence “PubMatic is the leading AI-powered ad tech company delivering digital advertising performance.” Source: RevenueBase Database · checked Sep 29, 2026
10	Centro	Strong evidence	Chicago, IL, United StatesHQ checked Sep 29, 2026	501-1,000	1,178 contacts →
	Strong evidence “Basis Technologies is a global provider of workflow automation, intelligence and programmatic trading software for the marketing enterprise.” Source: RevenueBase Database · checked Sep 29, 2026
11	Mediaocean	Partial evidence	New York, NY, United StatesHQ checked Sep 29, 2026	1,001-5,000	1,050 contacts →
	Partial evidence “Mediaocean is powering the future of the advertising ecosystem with technology that empowers brands and agencies to deliver impactful omnichannel marketing experiences.” Source: RevenueBase Database · checked Sep 29, 2026
12	Logical Position	Indirect evidence	Lake Oswego, OR, United StatesHQ checked Sep 29, 2026	501-1,000	899 contacts →
	Indirect evidence “Logical Position (LP) is an Inc.” Source: RevenueBase Database · checked Sep 29, 2026
13	Moloco	Indirect evidence	Menlo Park, CA, United StatesHQ checked Sep 29, 2026	501-1,000	893 contacts →
	Indirect evidence “Moloco’s mission is to be the scaling engine for the internet economy, applying AI to help businesses of all sizes grow.” Source: RevenueBase Database · checked Sep 29, 2026
14	BASIS	Partial evidence	Chicago, IL, United StatesHQ checked Sep 29, 2026	501-1,000	891 contacts →
	Partial evidence “Basis is a global provider of media automation and programmatic advertising software and services for enterprises.” Source: RevenueBase Database · checked Sep 29, 2026
15	WEBFX	Partial evidence	Harrisburg, PA, United StatesHQ checked Sep 29, 2026	501-1,000	866 contacts →
	Partial evidence “We're here to be your digital marketing growth partner in the AI era.” Source: RevenueBase Database · checked Sep 29, 2026
16	Activecampaign	Strong evidence	Chicago, IL, United StatesHQ checked Sep 29, 2026	1,001-5,000	863 contacts →
	Strong evidence “ActiveCampaign is the AI-first autonomous marketing platform built to transform how marketers, agencies, and entrepreneurs work.” Source: RevenueBase Database · checked Sep 29, 2026
17	Applovin	Indirect evidence	Palo Alto, CA, United StatesHQ checked Sep 29, 2026	201-500	733 contacts →
	Indirect evidence “AppLovin helps businesses of any size reach over a billion people who play mobile games every day.” Source: RevenueBase Database · checked Sep 29, 2026
18	simpli.fi	Partial evidence	Fort Worth, TX, United StatesHQ checked Sep 29, 2026	501-1,000	680 contacts →
	Partial evidence “Simpli.fi is a real-world media platform that connects digital intent with physical movement, helping brands reach audiences in the right place, at the right moment, to drive…” Source: RevenueBase Database · checked Sep 29, 2026
19	Wildnet Technologies	Partial evidence	New York, NY, United StatesHQ checked Sep 29, 2026	201-500	590 contacts →
	Partial evidence “Wildnet Technologies - Best Digital Marketing Agency \| White Label Services for Growing Agencies \| Results-Driven AI SEO Services We don't just run campaigns-we build growth…” Source: RevenueBase Database · checked Sep 29, 2026
20	Optimove	Partial evidence	New York, NY, United StatesHQ checked Sep 29, 2026	501-1,000	588 contacts →
	Partial evidence “Optimove, the creator of Positionless Marketing, frees marketing teams from the limitations of fixed roles, giving every marketer the power to execute any marketing task instantly…” Source: RevenueBase Database · checked Sep 29, 2026
21	Adobe Marketo	Partial evidence	San Jose, CA, United StatesHQ checked Sep 29, 2026	1,001-5,000	572 contacts →
	Partial evidence “Adobe Marketo Engage offers the leading Engagement Platform that empowers marketers to build brand value, grow revenue, and prove impact.” Source: RevenueBase Database · checked Sep 29, 2026
22	Viant Technology	Partial evidence	Irvine, CA, United StatesHQ checked Sep 29, 2026	201-500	418 contacts →
	Partial evidence “Viant Technology Inc.(NASDAQ: DSP) is a leader in AI-powered programmatic advertising, dedicated to driving innovation in digital marketing.” Source: RevenueBase Database · checked Sep 29, 2026
23	Localedge	Indirect evidence	Buffalo, NY, United StatesHQ checked Sep 29, 2026	501-1,000	383 contacts →
	Indirect evidence “LocalEdge, a Hearst Media Services Company, offers a full suite of online advertising products and services for any size business and budget across the country.” Source: RevenueBase Database · checked Sep 29, 2026
24	Hightouch	Strong evidence	San Francisco, CA, United StatesHQ checked Sep 29, 2026	201-500	358 contacts →
	Strong evidence “Hightouch is an Agentic Marketing Platform powered by the industry-leading Composable CDP.” Source: RevenueBase Database · checked Sep 29, 2026
25	Deltax	Indirect evidence	New York, NY, United StatesHQ checked Sep 29, 2026	201-500	357 contacts →
	Indirect evidence “DeltaX is an enterprise-grade full-stack cross-channel advertising solution.” Source: RevenueBase Database · checked Sep 29, 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: search marketing automation platforms. 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 search marketing automation platforms.
Partial evidence: Its own public description names part of search marketing automation platforms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name search marketing automation platforms. 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 3,422 search marketing automation platforms based in the United States

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Search marketing automation platforms based in the United States at a glance

As of Sep 29, 2026

34.5%Verified-email coverage

19.5Average contacts per company

1-10Median size (employees)

6.3%Largest-city concentration · New York

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

2,127

11-50

917

51-200

252

201-500

501-1,000

1,001-5,000

5,001-10,000

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 3,422 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 search marketing automation platforms, 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 “search marketing automation platforms”. 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 search marketing automation platforms), 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 search marketing automation platforms, 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, 23,021 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 29, 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.

Search marketing automation platforms 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 search marketing automation platforms, 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 search marketing automation platforms are there based in the United States?

RevenueBase identified 3,422 search marketing automation platforms 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?

HIBU, headquartered in Cedar Rapids, tops this list with the largest team on record.

Which city has the most search marketing automation platforms?

New York leads with 215 headquartered companies, followed by San Francisco (125) and Los Angeles (83).

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 23,021 verified decision-maker contacts tracked across these 3,422 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 29, 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.