Company lists · Data refreshed November 2026

Top 25 Semantic search optimization tools companies based in the United States

RevenueBase identified 218 company matches for semantic search optimization tools companies associated with the United States as of November 2026 and tracks 1,883 professional contacts across them, including 537 with verified work emails. San Francisco is the largest hub.

This list covers company matches for semantic search optimization tools companies associated with the United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed November 6, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Nov 6, 2026 How this list was built
218Companies
1,883Contacts tracked
537Verified emails
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The 25 largest semantic search optimization tools companies based in the United States

Ranked by team size
Top 25 of 218 company matches for semantic search optimization tools companies based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchSan Francisco, CA, United StatesHQ recorded Nov 6, 2026201-500210 contacts →

Exact match

“Lucidworks makes search a superpower-ensuring the right information reaches the right people at the right time.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2Exact matchSan Francisco, United StatesHQ recorded Nov 6, 202651-200111 contacts →

Exact match

“Writesonic runs your marketing for the AI-search era.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3Exact matchEl Segundo, CA, United StatesHQ recorded Nov 6, 202651-200106 contacts →

Exact match

“SearchStax - the Search Experience Company - enables marketers and developers to deliver fast, relevant website search experiences.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4Exact matchNew York, NY, United StatesHQ recorded Nov 6, 202651-20083 contacts →

Exact match

“Passionfruit is the world's first AI-powered, end-to-end SEO/GEO growth engine that has proven to drive an average of 50% revenue growth for its clients.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5Exact matchSan Francisco, United StatesHQ recorded Nov 6, 2026n/a67 contacts →

Exact match

“site:https://Gloc.al (in process of re-branding) Glocal SEO Platform 2025 raised USD plus USD startup valued currently on USD $8.5 million by retail investors of…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchChicago, IL, United StatesHQ recorded Nov 6, 202651-20062 contacts →

Exact match

“seoClarity is an enterprise search intelligence platform that merges SEO and AI search optimization to keep global brands visible across a fragmented search landscape.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchAltadena, CA, United StatesHQ recorded Nov 6, 202611-5058 contacts →

Exact match

“Your AI-powered SEO Co-Pilot Summary: Scalenut is an AI-powered SEO platform that helps businesses drive organic traffic and build sustainable businesses.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact matchSheridan, WY, United StatesHQ recorded Nov 6, 202651-20048 contacts →

Exact match

“WEBCEO LLC, founded in produces the world-famous WebCEO SEO Platform with 24 tools and white-label functionality.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact matchSunnyvale, CA, United StatesHQ recorded Nov 6, 202611-5033 contacts →

Exact match

“Founded by Dr.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchSeattle, WA, United StatesHQ recorded Nov 6, 202611-5027 contacts →

Exact match

“Your website was built for humans.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchGlendale, CA, United StatesHQ recorded Nov 6, 202611-5024 contacts →

Exact match

“Since its inception in 1998, Submit Express has helped thousands of companies with their search engine marketing (SEM) needs, from search engine submission to search engine…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchAustin, TX, United StatesHQ recorded Nov 6, 202611-5022 contacts →

Exact match

“Get hired today.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchWorthington, OH, United StatesHQ recorded Nov 6, 202611-5020 contacts →

Exact match

“DemandSphere is an enterprise SEO and content intelligence platform with 250+ enterprise customers around the world, including luxury apparel brands, ecommerce marketplaces…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchWestlake Village, CA, United StatesHQ recorded Nov 6, 202611-5020 contacts →

Exact match

“Opened in 2010 by our CEO: Eric Sachs - Local Search Engine Optimization (SEO) and Social Media company based in Southern California.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchLakewood, CO, United StatesHQ recorded Nov 6, 202611-5018 contacts →

Exact match

“Welcome to CSP Agency, your elite partner in GEO & SEO.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchSan Francisco Bay, CA, United StatesHQ recorded Nov 6, 20261-1013 contacts →

Exact match

“Transforming Organic marketing with AI🤖 We're Consumable AI, a forward-thinking digital marketing company dedicated to driving organic growth for brands and companies in an…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact matchCupertino, CA, United StatesHQ recorded Nov 6, 202611-5012 contacts →

Exact match

“Search is broken for consumers, marketers, and e-commerce sites.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact matchDes Plaines, IL, United StatesHQ recorded Nov 6, 202611-5010 contacts →

Exact match

“HawkSearch is an intelligent search and recommendations platform that powers success for any size business across all industries.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact matchRichardson, TX, United StatesHQ recorded Nov 6, 202611-5010 contacts →

Exact match

“Language Computer Corporation (LCC) is a privately-owned U.S.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact matchSan Francisco, CA, United StatesHQ recorded Nov 6, 20261-109 contacts →

Exact match

“Search Strategy Solutions is a group of search-industry veterans with broad experience in the many disciplines of search including: data and metadadata, taxonomy and…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchScottsdale, AZ, United StatesHQ recorded Nov 6, 202611-509 contacts →

Exact match

“RivalFlow finds exactly what's missing from your pages and writes the perfect content to optimize them, in your voice and placed right where it belongs.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22Exact matchRehoboth Beach, DE, United StatesHQ recorded Nov 6, 20261-106 contacts →

Exact match

“Alli AI is the AI Search Visibility Platform.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23Exact matchCleveland, OH, United StatesHQ recorded Nov 6, 202611-506 contacts →

Exact match

“As a true industry pioneer, providing some of the world’s most powerful, flexible and scalable search solutions since 1981, Thunderstone Software LLC has developed hard-to-match…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24Exact matchPark City, UT, United StatesHQ recorded Nov 6, 202611-506 contacts →

Exact match

“Huckabuy is a fast-growing tech startup based in Park City, Utah.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25Exact matchSan Diego, CA, United StatesHQ recorded Nov 6, 202611-505 contacts →

Exact match

“Built for scale.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

Showing 25 of 218 semantic search optimization tools companies based in the United States

See the full list, filter by size, metro and specialty, and access 537 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Semantic search optimization tools companies based in the United States at a glance

As of Nov 6, 2026
28.5%Verified-email coverage
8.6Average contacts per company
1-10Median size (employees)
6.9%Largest-city concentration · San Francisco
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
144
11-50
58
51-200
12
201-500
3
10001+
1

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 218 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Company records associated with the United States whose business descriptions match “semantic search optimization tools companies” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 537 professional contacts with verified work emails across the full matched dataset. 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 November 6, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “semantic search optimization tools companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many semantic search optimization tools companies are there based in the United States?

RevenueBase identified 218 company matches for semantic search optimization tools companies associated with the United States as of November 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Lucidworks tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most semantic search optimization tools companies?

San Francisco leads with 15 company records, followed by New York (12) and Miami (6).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 537 professional contacts with verified work emails tracked across these 218 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on November 6, 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 SmartSearch, 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.