Company lists · Data refreshed September 2026
Top 25 Spam filtering companies worldwide
RevenueBase identified 162 company matches for spam filtering companies worldwide as of September 2026 and tracks 2,294 professional contacts across them, including 512 with verified work emails. The United States is the largest market and San Francisco the largest hub.
This list covers company matches for spam filtering companies worldwide, 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. Country and city lists for spam filtering companies follow the table.
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.
The 25 largest spam filtering companies worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 236 contacts → | ||||
Exact match “Sublime is the new standard for email security.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase | |||||
| 2 | 200 contacts → | ||||
Exact match “Zix, an OpenText company, is a leader in email security and helps organizations overcome their greatest digital transformation challenges by providing a secure, modern workplace.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase | |||||
| 3 | 129 contacts → | ||||
Exact match “EasyDMARC is your one-stop platform that secures your email domain infrastructure and boosts email deliverability for your peace of mind.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase | |||||
| 4 | 86 contacts → | ||||
Exact match “Zivver is the all-in-one email security solution provider for managing and eliminating evolving risk – whether it’s human error, cyber threats, or data compliance.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase | |||||
| 5 | 53 contacts → | ||||
Exact match “Tessian was acquired by Proofpoint.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase | |||||
| 6 | 53 contacts → | ||||
Exact match “Cloudmark was acquired by Proofpoint.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase | |||||
| 7 | 45 contacts → | ||||
Exact match “Desenvolvimento de soluções de segurança para internet de empresas: e-mail, web, firewall e MSN” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase | |||||
| 8 | 43 contacts → | ||||
Exact match “PowerDMARC empowers organizations to combat Business Email Compromise (BEC), email spoofing, and phishing with ease.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase | |||||
| 9 | 39 contacts → | ||||
Exact match “Libraesva secures email communications for organisations, helping them eliminate email borne threats, preserve email data and provide an environment for their people to…” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase | |||||
| 10 | 39 contacts → | ||||
Exact match “Cyren, now part of Data443, protects hundreds of millions of users around the world from sophisticated and emerging email, malware, and web attacks every day.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase | |||||
| 11 | 33 contacts → | ||||
Exact match “AIR Co, Ltd.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase | |||||
| 12 | 32 contacts → | ||||
Exact match “Topsec is a leading provider of cloud based managed email security solutions.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase | |||||
| 13 | 28 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase | |||||
| 14 | 26 contacts → | ||||
Exact match “Abnormal provides total protection against the widest range of email attacks including phishing, malware, ransomware, social engineering, executive impersonation, supply chain…” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase | |||||
| 15 | 25 contacts → | ||||
Exact match “MailGuard, A GlobalGuard Company, is a global leader in email threat detection.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase | |||||
| 16 | 25 contacts → | ||||
Exact match “AnubisNetworks is an Email CyberSecurity company.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase | |||||
| 17 | 23 contacts → | ||||
Exact match “Cloudflare Area 1 is a cloud-native email security service that identifies and blocks attacks before they hit user inboxes, enabling more effective protection against spear…” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase | |||||
| 18 | 22 contacts → | ||||
Exact match “Liverton Security is a trusted cybersecurity provider specialising in secure email solutions and information security consulting.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase | |||||
| 19 | 20 contacts → | ||||
Exact match “CleanTalk is a SaaS spam protection service for Web sites.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase | |||||
| 20 | 19 contacts → | ||||
Exact match “Founded in 2003, Sendio is a venture-backed, privately held company whose products protect the email environments of enterprises and institutions from attacks and abuse, and…” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase | |||||
| 21 | 16 contacts → | ||||
Exact match “MailGate SC is a comprehensive email security solution that protects your organization from a wide range of advanced threats.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase | |||||
| 22 | 16 contacts → | ||||
Exact match “Interbel: Pioneros en Email & Ciberseguridad en España "#1 Optimizando el Email y la Ciberseguridad con Tecnología Avanzada" En Interbel, con más de 26 años de experiencia, somos…” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase | |||||
| 23 | 15 contacts → | ||||
Exact match “Libèrez vos mails!” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase | |||||
| 24 | 15 contacts → | ||||
Exact match “Spambrella is a Worldwide email content control security ‘software as a service’ (SaaS) provider.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase | |||||
| 25 | 15 contacts → | ||||
Exact match “EdgeWave is hyper-focused on delivering the World’s Safest Inboxes™ by eliminating email-borne security risks for organizations in the face of targeted, socially engineered…” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase | |||||
RevenueBase SmartSearch
Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.
This list uses Exact for “spam filtering companies”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.
Showing 25 of 162 spam filtering companies worldwide
See the full list, filter by size, metro and specialty, and access 512 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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Spam filtering companies worldwide at a glance
As of Sep 22, 2026Companies by employee count
Email recency is reported on each country list linked below.
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.
- Coverage
- Every country. Country and city lists for spam filtering companies are linked below.
- What qualifies
- Company records worldwide whose business descriptions match “spam 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. 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 512 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.
Spam filtering companies by location
1 lists · largest firstEvery Spam filtering companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
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 “spam filtering companies”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many spam filtering companies are there worldwide?
RevenueBase identified 162 company matches for spam filtering companies worldwide 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?
Sublime Security tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which country has the most spam filtering companies?
The United States leads with 49 companies. Every spam filtering companies list by country and city is linked on this page.
Which city has the most spam filtering companies?
San Francisco leads with 6 company records, followed by London (4) and Seoul (3).
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 512 professional contacts with verified work emails tracked across these 162 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.
Ready to reach these companies? Verified emails and direct dials for all 162 spam filtering companies worldwide. Start with a free account, no credit card.
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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.
More company lists
Company intelligence · public preview
Top 25 spam filtering companies worldwide
Find companies in any niche.
Describe the businesses you want in your own words. RevenueBase SmartSearch matches company descriptions by meaning.
RevenueBase records 162 matching company records for spam filtering companies worldwide, with 2,294 tracked contacts and 512 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 22, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 spam filtering companies worldwide
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 |  Sublime Securitysublime.securityHQ: Washington, DC, United StatesReported employees: 201-500 | Washington, DC, United States | 201-500 | Exact match | 236 contacts → |
“Sublime is the new standard for email security.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  ZIXzix.comHQ: Dallas, TX, United StatesReported employees: 501-1,000 | Dallas, TX, United States | 501-1,000 | Exact match | 200 contacts → |
“Zix, an OpenText company, is a leader in email security and helps organizations overcome their greatest digital transformation challenges by providing a secure, modern workplace.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 |  Easydmarceasydmarc.comHQ: Dover, DE, United StatesReported employees: 51-200 | Dover, DE, United States | 51-200 | Exact match | 129 contacts → |
“EasyDMARC is your one-stop platform that secures your email domain infrastructure and boosts email deliverability for your peace of mind.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  Zivverzivver.comHQ: Amsterdam-duivendrecht, NetherlandsReported employees: 51-200 | Amsterdam-duivendrecht, Netherlands | 51-200 | Exact match | 86 contacts → |
“Zivver is the all-in-one email security solution provider for managing and eliminating evolving risk – whether it’s human error, cyber threats, or data compliance.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  Tessiantessian.comHQ: Boston, United StatesReported employees: 201-500 | Boston, United States | 201-500 | Exact match | 53 contacts → |
“Tessian was acquired by Proofpoint.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 |  Cloudmarkcloudmark.comHQ: San Francisco, CA, United StatesReported employees: 51-200 | San Francisco, CA, United States | 51-200 | Exact match | 53 contacts → |
“Cloudmark was acquired by Proofpoint.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 |  MAV Tecnologiameile.com.brHQ: Belo Horizonte, BrazilReported employees: 11-50 | Belo Horizonte, Brazil | 11-50 | Exact match | 45 contacts → |
“Desenvolvimento de soluções de segurança para internet de empresas: e-mail, web, firewall e MSN” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 |  Powerdmarcpowerdmarc.comHQ: Middletown, DE, United StatesReported employees: 51-200 | Middletown, DE, United States | 51-200 | Exact match | 43 contacts → |
“PowerDMARC empowers organizations to combat Business Email Compromise (BEC), email spoofing, and phishing with ease.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  Libraesvalibraesva.comHQ: Lecco, ItalyReported employees: 11-50 | Lecco, Italy | 11-50 | Exact match | 39 contacts → |
“Libraesva secures email communications for organisations, helping them eliminate email borne threats, preserve email data and provide an environment for their people to…” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  Cyren By Data443data443.comHQ: Research Triangle Park, NC, United StatesReported employees: 201-500 | Research Triangle Park, NC, United States | 201-500 | Exact match | 39 contacts → |
“Cyren, now part of Data443, protects hundreds of millions of users around the world from sophisticated and emerging email, malware, and web attacks every day.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | AIR Company Limitedair.co.jp HQ: 吹田市, JapanReported employees: 51-200 | 吹田市, Japan | 51-200 | Exact match | 33 contacts → |
“AIR Co, Ltd.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 |  Topsec Cloud Solutionstopsec.comHQ: Sandyford, IrelandReported employees: 11-50 | Sandyford, Ireland | 11-50 | Exact match | 32 contacts → |
“Topsec is a leading provider of cloud based managed email security solutions.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Boxitoboxito.com.mx HQ: MexicoReported employees: 11-50 | Mexico | 11-50 | Exact match | 28 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 14 | Abnormal Securityabnormalsecurity.com HQ: San Francisco, CA, United StatesReported employees: 501-1,000 | San Francisco, CA, United States | 501-1,000 | Exact match | 26 contacts → |
“Abnormal provides total protection against the widest range of email attacks including phishing, malware, ransomware, social engineering, executive impersonation, supply chain…” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 |  Mailguard A Globalguard Companymailguard.com.auHQ: Melbourne, AustraliaReported employees: 51-200 | Melbourne, Australia | 51-200 | Exact match | 25 contacts → |
“MailGuard, A GlobalGuard Company, is a global leader in email threat detection.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 |  Anubisnetworksanubisnetworks.comHQ: Lisbon, PortugalReported employees: 11-50 | Lisbon, Portugal | 11-50 | Exact match | 25 contacts → |
“AnubisNetworks is an Email CyberSecurity company.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 |  Cloudflare Area 1 Securitycloudflare.comHQ: San Francisco, CA, United StatesReported employees: 51-200 | San Francisco, CA, United States | 51-200 | Exact match | 23 contacts → |
“Cloudflare Area 1 is a cloud-native email security service that identifies and blocks attacks before they hit user inboxes, enabling more effective protection against spear…” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 |  Liverton Security Limitedlivertonsecurity.comHQ: Wellington, United KingdomReported employees: 11-50 | Wellington, United Kingdom | 11-50 | Exact match | 22 contacts → |
“Liverton Security is a trusted cybersecurity provider specialising in secure email solutions and information security consulting.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 |  Cleantalk INCcleantalk.orgHQ: Carson City, NV, United StatesReported employees: 1-10 | Carson City, NV, United States | 1-10 | Exact match | 20 contacts → |
“CleanTalk is a SaaS spam protection service for Web sites.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 |  Sendio Technologies, INCsendio.comHQ: Newport Beach, CA, United StatesReported employees: 11-50 | Newport Beach, CA, United States | 11-50 | Exact match | 19 contacts → |
“Founded in 2003, Sendio is a venture-backed, privately held company whose products protect the email environments of enterprises and institutions from attacks and abuse, and…” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 |  Mailgatemailgatesc.comHQ: Greenwood, IN, United StatesReported employees: 11-50 | Greenwood, IN, United States | 11-50 | Exact match | 16 contacts → |
“MailGate SC is a comprehensive email security solution that protects your organization from a wide range of advanced threats.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 |  Interbelinterbel.esHQ: Barcelona, SpainReported employees: 11-50 | Barcelona, Spain | 11-50 | Exact match | 16 contacts → |
“Interbel: Pioneros en Email & Ciberseguridad en España "#1 Optimizando el Email y la Ciberseguridad con Tecnología Avanzada" En Interbel, con más de 26 años de experiencia, somos…” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 |  Hornetsecurityaltospam.comHQ: Bordeaux (33000), FranceReported employees: 11-50 | Bordeaux (33000), France | 11-50 | Exact match | 15 contacts → |
“Libèrez vos mails!” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 |  Spambrellaspambrella.comHQ: Dover, DE, United StatesReported employees: 51-200 | Dover, DE, United States | 51-200 | Exact match | 15 contacts → |
“Spambrella is a Worldwide email content control security ‘software as a service’ (SaaS) provider.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 |  Edgewaveedgewave.comHQ: La Jolla, CA, United StatesReported employees: 51-200 | La Jolla, CA, United States | 51-200 | Exact match | 15 contacts → |
“EdgeWave is hyper-focused on delivering the World’s Safest Inboxes™ by eliminating email-borne security risks for organizations in the face of targeted, socially engineered…” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 162 company matches
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Spam filtering companies: dataset insights
September 22, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
162 records in the displayed employee bands.
0 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Email recency for this list is measured across the whole country list rather than for Worldwide, so it is reported there. Company counts and contact totals on this page are exact for Worldwide, over 162 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 22, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Spam filtering companies by location
1 lists · largest firstEvery Spam filtering companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
Questions about this company list
What does Exact match mean for spam filtering companies?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many spam filtering companies did RevenueBase find worldwide?
The saved snapshot records 162 matching company records, 2,294 tracked contacts and 512 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 22, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
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Cite this list
RevenueBase Data Team. Top 25 spam filtering companies worldwide. Snapshot: September 22, 2026. https://revenuebase.ai/companies/browse/spam-filtering-companies.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
More company lists
Company intelligence · public preview
Top 25 spam filtering companies worldwide
RevenueBase records 162 matching company records for spam filtering companies worldwide, with 2,294 tracked contacts and 512 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 22, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 spam filtering companies worldwide
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 | Sublime Securitysublime.security HQ: Washington, DC, United StatesReported employees: 201-500 | Washington, DC, United States | 201-500 | Exact match | 236 contacts → |
“Sublime is the new standard for email security.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | ZIXzix.com HQ: Dallas, TX, United StatesReported employees: 501-1,000 | Dallas, TX, United States | 501-1,000 | Exact match | 200 contacts → |
“Zix, an OpenText company, is a leader in email security and helps organizations overcome their greatest digital transformation challenges by providing a secure, modern workplace.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Easydmarceasydmarc.com HQ: Dover, DE, United StatesReported employees: 51-200 | Dover, DE, United States | 51-200 | Exact match | 129 contacts → |
“EasyDMARC is your one-stop platform that secures your email domain infrastructure and boosts email deliverability for your peace of mind.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | Zivverzivver.com HQ: Amsterdam-duivendrecht, NetherlandsReported employees: 51-200 | Amsterdam-duivendrecht, Netherlands | 51-200 | Exact match | 86 contacts → |
“Zivver is the all-in-one email security solution provider for managing and eliminating evolving risk – whether it’s human error, cyber threats, or data compliance.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Tessiantessian.com HQ: Boston, United StatesReported employees: 201-500 | Boston, United States | 201-500 | Exact match | 53 contacts → |
“Tessian was acquired by Proofpoint.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Cloudmarkcloudmark.com HQ: San Francisco, CA, United StatesReported employees: 51-200 | San Francisco, CA, United States | 51-200 | Exact match | 53 contacts → |
“Cloudmark was acquired by Proofpoint.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | MAV Tecnologiameile.com.br HQ: Belo Horizonte, BrazilReported employees: 11-50 | Belo Horizonte, Brazil | 11-50 | Exact match | 45 contacts → |
“Desenvolvimento de soluções de segurança para internet de empresas: e-mail, web, firewall e MSN” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Powerdmarcpowerdmarc.com HQ: Middletown, DE, United StatesReported employees: 51-200 | Middletown, DE, United States | 51-200 | Exact match | 43 contacts → |
“PowerDMARC empowers organizations to combat Business Email Compromise (BEC), email spoofing, and phishing with ease.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | Libraesvalibraesva.com HQ: Lecco, ItalyReported employees: 11-50 | Lecco, Italy | 11-50 | Exact match | 39 contacts → |
“Libraesva secures email communications for organisations, helping them eliminate email borne threats, preserve email data and provide an environment for their people to…” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Cyren By Data443data443.com HQ: Research Triangle Park, NC, United StatesReported employees: 201-500 | Research Triangle Park, NC, United States | 201-500 | Exact match | 39 contacts → |
“Cyren, now part of Data443, protects hundreds of millions of users around the world from sophisticated and emerging email, malware, and web attacks every day.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | AIR Company Limitedair.co.jp HQ: 吹田市, JapanReported employees: 51-200 | 吹田市, Japan | 51-200 | Exact match | 33 contacts → |
“AIR Co, Ltd.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Topsec Cloud Solutionstopsec.com HQ: Sandyford, IrelandReported employees: 11-50 | Sandyford, Ireland | 11-50 | Exact match | 32 contacts → |
“Topsec is a leading provider of cloud based managed email security solutions.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Boxitoboxito.com.mx HQ: MexicoReported employees: 11-50 | Mexico | 11-50 | Exact match | 28 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 14 | Abnormal Securityabnormalsecurity.com HQ: San Francisco, CA, United StatesReported employees: 501-1,000 | San Francisco, CA, United States | 501-1,000 | Exact match | 26 contacts → |
“Abnormal provides total protection against the widest range of email attacks including phishing, malware, ransomware, social engineering, executive impersonation, supply chain…” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Mailguard A Globalguard Companymailguard.com.au HQ: Melbourne, AustraliaReported employees: 51-200 | Melbourne, Australia | 51-200 | Exact match | 25 contacts → |
“MailGuard, A GlobalGuard Company, is a global leader in email threat detection.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | Anubisnetworksanubisnetworks.com HQ: Lisbon, PortugalReported employees: 11-50 | Lisbon, Portugal | 11-50 | Exact match | 25 contacts → |
“AnubisNetworks is an Email CyberSecurity company.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | Cloudflare Area 1 Securitycloudflare.com HQ: San Francisco, CA, United StatesReported employees: 51-200 | San Francisco, CA, United States | 51-200 | Exact match | 23 contacts → |
“Cloudflare Area 1 is a cloud-native email security service that identifies and blocks attacks before they hit user inboxes, enabling more effective protection against spear…” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Liverton Security Limitedlivertonsecurity.com HQ: Wellington, United KingdomReported employees: 11-50 | Wellington, United Kingdom | 11-50 | Exact match | 22 contacts → |
“Liverton Security is a trusted cybersecurity provider specialising in secure email solutions and information security consulting.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Cleantalk INCcleantalk.org HQ: Carson City, NV, United StatesReported employees: 1-10 | Carson City, NV, United States | 1-10 | Exact match | 20 contacts → |
“CleanTalk is a SaaS spam protection service for Web sites.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Sendio Technologies, INCsendio.com HQ: Newport Beach, CA, United StatesReported employees: 11-50 | Newport Beach, CA, United States | 11-50 | Exact match | 19 contacts → |
“Founded in 2003, Sendio is a venture-backed, privately held company whose products protect the email environments of enterprises and institutions from attacks and abuse, and…” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Mailgatemailgatesc.com HQ: Greenwood, IN, United StatesReported employees: 11-50 | Greenwood, IN, United States | 11-50 | Exact match | 16 contacts → |
“MailGate SC is a comprehensive email security solution that protects your organization from a wide range of advanced threats.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Interbelinterbel.es HQ: Barcelona, SpainReported employees: 11-50 | Barcelona, Spain | 11-50 | Exact match | 16 contacts → |
“Interbel: Pioneros en Email & Ciberseguridad en España "#1 Optimizando el Email y la Ciberseguridad con Tecnología Avanzada" En Interbel, con más de 26 años de experiencia, somos…” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Hornetsecurityaltospam.com HQ: Bordeaux (33000), FranceReported employees: 11-50 | Bordeaux (33000), France | 11-50 | Exact match | 15 contacts → |
“Libèrez vos mails!” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Spambrellaspambrella.com HQ: Dover, DE, United StatesReported employees: 51-200 | Dover, DE, United States | 51-200 | Exact match | 15 contacts → |
“Spambrella is a Worldwide email content control security ‘software as a service’ (SaaS) provider.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | Edgewaveedgewave.com HQ: La Jolla, CA, United StatesReported employees: 51-200 | La Jolla, CA, United States | 51-200 | Exact match | 15 contacts → |
“EdgeWave is hyper-focused on delivering the World’s Safest Inboxes™ by eliminating email-borne security risks for organizations in the face of targeted, socially engineered…” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 162 company matches
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Spam filtering companies: dataset insights
September 22, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
162 records in the displayed employee bands.
0 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Email recency for this list is measured across the whole country list rather than for Worldwide, so it is reported there. Company counts and contact totals on this page are exact for Worldwide, over 162 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 22, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Spam filtering companies by location
1 lists · largest firstEvery Spam filtering companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
Questions about this company list
What does Exact match mean for spam filtering companies?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many spam filtering companies did RevenueBase find worldwide?
The saved snapshot records 162 matching company records, 2,294 tracked contacts and 512 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 22, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
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Cite this list
RevenueBase Data Team. Top 25 spam filtering companies worldwide. Snapshot: September 22, 2026. https://revenuebase.ai/companies/browse/spam-filtering-companies.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗