Email Security Providers Market Share & Usage Statistics (2026)
Microsoft Defender runs on 268,449 live websites, 37.3% of the 718,968 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 Aug 19, 2026
- #1
Mimecast
Mimecast is a cloud email security gateway that filters mail before it reaches the mailbox.
Live websites69,123Market Share9.61%Top CountryUnited States - #2
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 websites53,149Market Share7.39%Top CountryUnited States - #3
Sophos
Sophos is detected on 46,240 domains in our August 2026 rollup, 7th of 12 in Email Security on 6.43% share.
Live websites46,240Market Share6.43%Top CountryUnited States Cisco Email Security
Cisco's email security gateway, formerly IronPort, filters inbound mail for 11,136 domains.
Live websites10,798Market Share1.5%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 Defender37.34%
- JJellyfish13.42%
- Mimecast9.61%
MailChannels9.15%- BBarracuda8.95%
- Proofpoint7.39%
- …Others14.1%
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 718,968 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 718,968 detected sites, the most widely found email security tools are: Microsoft Defender (37.34% share, 268,449 sites), Jellyfish (13.42% share, 96,512 sites), Mimecast (9.61% share, 69,123 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 37.34% share, on 268,449 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 Financial Services, Construction, IT Services and IT Consulting, Hospitals and Health Care, Insurance. 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, Australia, Canada. 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 718,968 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.