Email Security Providers Market Share & Usage Statistics (2026)
Microsoft Defender runs on 286,844 live websites, 37.4% of the 767,806 sites we detect using email security providers. Below, all 12 tools we detect in this category, ranked by live websites, with market share and 30-day adoption momentum.
Data updated Oct 19, 2026
- #1
Jellyfish
Companies that use Jellyfish: 95,075 domains route their mail through Namecheap's Jellyfish filter in our October 2026 crawl, including Namecheap itself, Ha-Meem Group and Adron Homes.
Live websites (cleaned)95,075Market Share12.38%Top CountryUnited States - #2
Mimecast
Companies that use Mimecast: 72,817 domains route their mail through it in our October 2026 crawl, including HP, CVS Health and Sanofi.
Live websites72,817Market Share9.48%Top CountryUnited States - #3
MailChannels
Companies that use MailChannels: 67,894 domains filter inbound mail through it in our October 2026 crawl, most of them DreamHost customers.
Live websites67,894Market Share8.84%Top CountryUnited States Barracuda
Companies that use Barracuda: 67,327 domains route inbound mail through Barracuda's email gateway in our October 2026 crawl, including Tupperware, Havells and Mankind Pharma.
Live websites67,327Market Share8.77%Top CountryUnited States
Proofpoint
Proofpoint filters inbound mail for 53,149 domains in our live crawl, 7.39% of Email Security and inside the same band as Mimecast (69,123), Barracuda (64,320) and Sophos (46,240).
Live websites56,902Market Share7.41%Top CountryUnited States
Sophos
Sophos is detected on 46,240 domains in our August 2026 rollup, 7th of 12 in Email Security on 6.43% share.
Live websites49,072Market Share6.39%Top CountryUnited StatesHornetsecurity
Companies that use Hornetsecurity: 44,890 domains route inbound mail through it in our October 2026 crawl, including Miele, MANN+HUMMEL and KSB.
Live websites44,890Market Share5.85%Top CountryGermanyCisco Email Security
Cisco's email security gateway, formerly IronPort, filters inbound mail for 11,136 domains.
Live websites11,215Market Share1.46%Top CountryUnited States
SpamTitan
Companies that use SpamTitan: 1,740 domains send their inbound mail through TitanHQ's spam filter in our October 2026 crawl, including Nikki Beach, Levain Bakery and Mirvish Productions.
Live websites1,740Market Share0.23%Top CountryUnited StatesValidity
Companies that use Validity: in our October 2026 crawl, 1,195 domains carry a Validity domain-verification record, most of them the one its Sender Certification program requires.
Live websites (cleaned)1,195Market Share0.16%Top CountryUnited States
Email Security Market Data
Adoption and 30-day momentum across 12 email security technologies, measured from our live detection crawl.
Biggest Movers
Market Share
- MMicrosoft Defender37.36%
- JJellyfish12.38%
- Mimecast9.48%
- MailChannels8.84%
- BBarracuda8.77%
- Proofpoint7.41%
- …Others15.8%
Email Security
FAQ.
What is Email Security software?
Email Security covers the tools a site can load or configure to handle this part of its stack. We detect one of the 12 email security tools in this category on 767,806 live sites. A detection means we found the technology on the site, which is not the same as a paid account.
What are the most popular email security platforms?
Across 767,806 detected sites, the most widely found email security tools are: Microsoft Defender (37.36% share, 286,844 sites), Jellyfish (12.38% share, 95,075 sites), Mimecast (9.48% share, 72,817 sites). Others we see regularly include MailChannels and Barracuda.
Which email security tool has the largest market share?
Microsoft Defender is the most widely detected email security tool at 37.36% share, on 286,844 sites. The largest share of those sites belongs to various companies, and to businesses in the 1-10 employee band.
Which industries use email security software the most?
The industries with the most detected sites in this category are Construction, Financial Services, IT Services and IT Consulting, Real Estate, Hospitals and Health Care. Industry mix follows where these tools get installed, so a category carried by website builders or agency templates will lean toward the verticals those platforms serve rather than the vendor's target buyer.
Which countries have the highest adoption of email security tools?
We detect the most email security sites in United States, United Kingdom, Germany, Canada, Australia. Country here is the company's registered location in our enriched data rather than where the site is served from, so read it as a ranking of markets rather than a measure of any single one.
How do I choose the right email security platform?
Start from your own size, industry and primary use case rather than from share. Microsoft Defender, Jellyfish and Mimecast are the three we detect most often in this category, which tells you what is common, not what fits you. Compare their integrations, pricing tiers and support commitments against the workflow you actually run, and check each vendor's own documentation for current capabilities.
How many companies use email security software?
TechnologyChecker.io detects email security tools on 767,806 live sites. That is a count of sites carrying the technology, not a count of paying customers, and a site running two tools in this category is counted under each. We crawl 2 billion+ URLs across 29.9M live business domains each sweep.
What is the source of this data?
TechnologyChecker.io's web crawling and technology detection platform. We've logged 2.12 billion total detections over 20+ years, covering 40,000+ technologies across the 29.9M live business domains we successfully crawl each sweep. Detection methods include JavaScript analysis, HTTP headers, HTML patterns, DNS records, and certificate transparency logs.