Company lists · Data refreshed September 2026

Top 16 Web content filtering companies based in the United States

RevenueBase identified 32 company matches for web content filtering companies associated with the United States as of September 2026 and tracks 642 professional contacts across them, including 250 with verified work emails. Chesterton is the largest hub.

This list covers company matches for web content filtering 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 September 22, 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 Sep 22, 2026 How this list was built
32Companies
642Contacts tracked
250Verified emails
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The 16 largest web content filtering companies based in the United States

Ranked by team size
Top 16 of 32 company matches for web content filtering companies based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 22, 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 matchWashington, DC, United StatesHQ recorded Sep 22, 202651-200160 contacts →

Exact match

“DNSFilter protects every click, leveraging AI-driven content filtering and threat protection to block threats 10 days earlier than competitors and secure users everywhere they…”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
2Exact matchRedwood City, CA, United StatesHQ recorded Sep 22, 202651-200124 contacts →

Exact match

“Authentic8 helps intelligence and security teams investigate the digital world without exposing who they are, where they are, or what they are working on.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
3Exact matchHuntsville, United StatesHQ recorded Sep 22, 202651-20094 contacts →

Exact match

“Integrity Online started in the mid-'90s as a small group of loosely associated companies with the same goal: find a way to bring some sense to the Internet.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
4Exact matchSan Diego, CA, United StatesHQ recorded Sep 22, 202651-20076 contacts →

Exact match

“At Linewize, we help school districts and their communities keep children safe and thriving in their digital lives.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
5Exact matchAlexandria, VA, United StatesHQ recorded Sep 22, 202611-5023 contacts →

Exact match

“At SafeDNS, we are committed to creating a safer and more secure online environment for SMBs, enterprises, ISPs, MSPs, OEMs, and Education.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
6Exact matchChesterton, IN, United StatesHQ recorded Sep 22, 20261-1014 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
7Exact matchWaynesboro, PA, United StatesHQ recorded Sep 22, 202611-5010 contacts →

Exact match

“Compass Foundation specializes in dynamic content filtering across the entire internet.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
8Exact matchSan Francisco, CA, United StatesHQ recorded Sep 22, 20261-109 contacts →

Exact match

“Fastvue helps schools and businesses monitor, alert and report on internet usage issues.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
9Exact matchSan Francisco, CA, United StatesHQ recorded Sep 22, 202611-505 contacts →

Exact match

“Mailshell is the leading provider of Internet filtering engines and SDK for OEMs, including email reputation, anti-spam, anti-phishing, URL categorization and DNS security.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
10Exact matchEast Moline, IL, United StatesHQ recorded Sep 22, 202611-505 contacts →

Exact match

“In 1985 DerbyTech, Inc.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
11Exact matchDallas, TX, United StatesHQ recorded Sep 22, 20261-104 contacts →

Exact match

“ScoutDNS protects networks through DNS filtering of inappropriate websites, blocking malware/virus infected locations, and eliminating most web based advertisements for your users.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
12Exact matchJacksonville, FL, United StatesHQ recorded Sep 22, 202611-504 contacts →

Exact match

“BluePrint Data is a global leader in OEM Web / URL Content Filtering technologies and services offering the only Zero False Positive Guarantee available.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
13Exact matchWeatherford, TX, United StatesHQ recorded Sep 22, 20261-103 contacts →

Exact match

“CleanBrowsing is a DNS-based content filtering service.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
14Exact matchCleveland, OH, United StatesHQ recorded Sep 22, 20261-103 contacts →

Exact match

“SecureLinQ is a managed security services provider.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
15Exact matchFranklin, TN, United StatesHQ recorded Sep 22, 202651-2002 contacts →

Exact match

“Upward Mobility is a cloud-based technology startup which exists to provide consumers and organizations with access to industry leading mobile content-filtering and security…”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
16Exact matchGilbert, United StatesHQ recorded Sep 22, 20261-101 contacts →

Exact match

“We provide a router that will keep your entire family safe online.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase

Showing 16 of 32 web content filtering companies based in the United States

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Web content filtering companies based in the United States at a glance

As of Sep 22, 2026
38.9%Verified-email coverage
20.1Average contacts per company
11-50Median size (employees)
6.2%Largest-city concentration · Chesterton
Sep 22, 2026Page data refreshed

Companies by employee count

1-10
11
11-50
14
51-200
7

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 32 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 “web content filtering 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 250 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 September 22, 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 “web content filtering companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many web content filtering companies are there based in the United States?

RevenueBase identified 32 company matches for web content filtering companies associated with the United States as of September 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?

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

Which city has the most web content filtering companies?

Chesterton leads with 2 company records, followed by San Diego (2) and San Francisco (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 250 professional contacts with verified work emails tracked across these 32 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 September 22, 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.