Company lists · Data refreshed November 2026

Top 15 Website indexing software companies based in the United States

RevenueBase identified 42 company matches for website indexing software companies associated with the United States as of November 2026 and tracks 644 professional contacts across them, including 218 with verified work emails. San Francisco is the largest hub.

This list covers company matches for website indexing software 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 5, 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 5, 2026 How this list was built
42Companies
644Contacts tracked
218Verified emails
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The 15 largest website indexing software companies based in the United States

Ranked by team size
Top 15 of 42 company matches for website indexing software companies based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 5, 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 5, 202651-200117 contacts →

Exact match

“At Parallel Web Systems, we’re bringing a new web to life: it’s built with, by, and for AIs.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
2Exact matchSeattle, WA, United StatesHQ recorded Nov 5, 202651-200107 contacts →

Exact match

“SEOmoz is the world’s most popular provider of SEO software.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
3Exact matchEl Segundo, CA, United StatesHQ recorded Nov 5, 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 5, 2026 · View company records in RevenueBase
4Exact matchBellevue, WA, United StatesHQ recorded Nov 5, 202651-20091 contacts →

Exact match

“We help web publishers, service providers, and app developers monetize through Internet search solutions.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
5Exact matchMountain View, CA, United StatesHQ recorded Nov 5, 2026n/a43 contacts →

Exact match

“Search More.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
6Exact matchGlendale, CA, United StatesHQ recorded Nov 5, 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 5, 2026 · View company records in RevenueBase
7Exact matchBoston, MA, United StatesHQ recorded Nov 5, 202611-5017 contacts →

Exact match

“Index Data is a software development and consulting enterprise headquartered in Copenhagen and the United States, with offices in several countries.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
8Exact matchHouston, United StatesHQ recorded Nov 5, 202611-5016 contacts →

Exact match

“Typesense, Inc.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
9Exact matchAustin, TX, United StatesHQ recorded Nov 5, 202611-5013 contacts →

Exact match

“Search is a fundamental need of modern connected software.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
10Exact matchOrem, UT, United StatesHQ recorded Nov 5, 202611-508 contacts →

Exact match

“Perfect Search Corporation produces search appliances that can quickly index and search a wide variety of data, unstructured and structured, using proprietary algorithms that can…”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
11Exact matchCleveland, OH, United StatesHQ recorded Nov 5, 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 5, 2026 · View company records in RevenueBase
12Exact matchDenver, CO, United StatesHQ recorded Nov 5, 20261-104 contacts →

Exact match

“Finally, easy search tools for your digital product.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
13Exact matchMenlo Park, CA, United StatesHQ recorded Nov 5, 202611-503 contacts →

Exact match

“SearchForecast provides website publishing software, diagnostic tools and solutions for lead generation via search engines.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
14Exact matchBoston, MA, United StatesHQ recorded Nov 5, 20261-102 contacts →

Exact match

“ACCESS TO INFORMATION IS A HUMAN RIGHT Kazark is a Search & Discovery engine with a revolutionary and intuitive interface that better organizes content improving navigation.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
15Exact matchNeedham Heights, MA, United StatesHQ recorded Nov 5, 2026n/a1 contacts →

Exact match

“Needham Software LLC provides search, web development and machine learning software and services for companies of all sizes, from startups to the fortune 100”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase

Showing 15 of 42 website indexing software companies based in the United States

See the full list, filter by size, metro and specialty, and access 218 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Website indexing software companies based in the United States at a glance

As of Nov 5, 2026
33.9%Verified-email coverage
15.3Average contacts per company
11-50Median size (employees)
7.1%Largest-city concentration · San Francisco
Nov 5, 2026Page data refreshed

Companies by employee count

1-10
16
11-50
18
51-200
6
501-1,000
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 42 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 “website indexing software 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 218 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 5, 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 “website indexing software companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many website indexing software companies are there based in the United States?

RevenueBase identified 42 company matches for website indexing software 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?

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

Which city has the most website indexing software companies?

San Francisco leads with 3 company records, followed by Boston (2) and Los Altos (2).

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 218 professional contacts with verified work emails tracked across these 42 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 5, 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.