Email Hosting Providers Market Share & Usage Statistics (2026)
Microsoft 365 runs on 4,024,892 live websites, 45.4% of the 8,867,796 sites we detect using email hosting providers. Below, all 31 tools we detect in this category, ranked by live websites, with market share and 30-day adoption momentum.
Data updated Oct 19, 2026
- #1
Microsoft 365
Microsoft 365 delivers business email for 3,753,495 domains in our live crawl, first of the 31 technologies in Email & Webmail on 45.31% share.
Live websites4,024,892Market Share45.39%Top CountryUnited States - #2
Google Workspace
Google Workspace is Google's business email and collaboration suite.
Live websites3,865,837Market Share43.59%Top CountryUnited States - #3
Titan Email
Titan is a business email service that most customers get through their web host.
Live websites149,522Market Share1.69%Top CountryBrazil Yandex Mail
Companies that use Yandex Mail: 93,983 domains receive their email at Yandex in our October 2026 crawl, read from MX records.
Live websites93,983Market Share1.06%Top CountryTurkey
Proton Mail
Proton Mail is the encrypted email service run by Proton AG in Geneva.
Live websites (cleaned)46,917Market Share0.53%Top CountryUnited StatesQQ Mail
Companies that use QQ Mail: 43,458 domains point their MX records at Tencent's qq.com mail servers in our October 2026 crawl, mostly on Tencent Exmail, including 58.com, Hytera and Futu Holdings.
Live websites43,458Market Share0.49%Top CountryChina
iCloud Mail
Companies that use iCloud Mail: 35,316 domains receive their email at Apple's iCloud servers in our October 2026 crawl, mostly one-person firms.
Live websites35,316Market Share0.4%Top CountryUnited States
Mail.ru
Companies that use Mail.ru: 30,733 domains route their email to Mail.ru's VK WorkSpace servers in our October 2026 crawl.
Live websites (cleaned)30,733Market Share0.35%Top CountryRussia
Zoho Mail
362,108 domains receive their email through Zoho Mail, by our live crawl's check of every Zoho domain's MX record.
Live websites28,690Market Share0.32%Top CountryUnited States
Fastmail
Fastmail is an independent, subscription email host based in Melbourne.
Live websites24,674Market Share0.28%Top CountryUnited States
Email & Webmail Market Data
Adoption and 30-day momentum across 31 email & webmail technologies, measured from our live detection crawl.
Biggest Movers
Expert Insight: Email Hosting Providers Market Share & Momentum
Business email is a dead heat, and it is the cleanest number we publish.
Microsoft 365 runs on about 3.75M of the 8.3M live domains where we detect a mail provider, roughly 45%. Google Workspace is on about 3.63M, roughly 44%. The two are under 2 points apart, and both are read off the same signal, the domain's MX record, so neither side gets a measurement advantage. Turnover across the whole category is about 0.6% in 30 days, the lowest we publish anywhere.
Two vendors, nine tenths of the market
Microsoft 365 at about 45% and Google Workspace at about 44% hold roughly 89% of detected domains between them. Apple is third at close to 5% once you add the two rows we carry for the same product, and nothing else clears 2%. Titan Email is around 1.7%, Yandex Mail 1.1%, Yahoo and Proton under 1% each. A duopoly this tight is rare in our data, and it has held across every window we can measure.
Microsoft is inching ahead, Apple is the only other large line rising
Microsoft 365 added about 34,000 net domains over 90 days while Google Workspace lost about 23,000. Apple iCloud Mail added about 29,000 on a base of about 391,000, close to 7.5%, which is the fastest growth of any large provider and reflects custom domains on iCloud+ rather than consumer accounts. Proton Mail added about 2,700. Sender's 90-day gain of about 4,000 is nearly its whole footprint, and a handful of smaller tools look the same: they entered our detection set inside the window, so discount them.
Almost nobody changes mail provider, and here we can prove it
About 0.6% of detected domains dropped their provider over 30 days. Low churn usually makes us suspicious, because a count built on a verification record can only ever go up. This category is the exception: an MX record is live mail routing, so it changes the day a company migrates and stops resolving if it is wrong. The number is low because switching business email is genuinely rare, not because the instrument cannot see it.
Google Workspace is down on both windows, and the gap is what to watch
Google Workspace lost about 16,900 net domains over the latest 30 days and about 23,200 over 90, while Microsoft 365 gained on both. That's well under 1% of Google's base, a drift rather than an exodus, but both leaders have moved the same way on both windows, Microsoft up and Google down. Yandex Mail, Titan Email, QQ Mail and Mail.ru are down on both as well, all from much smaller bases. One limit worth knowing: a domain whose mail runs through shared hosting or a control panel often publishes no recognisable provider MX at all, so the 8.3M base is the addressable market for hosted business email rather than every domain that receives mail.
Market Share
- Microsoft 36545.39%
- Google Workspace43.59%
- Apple iCloud Mail4.41%
- TTitan Email1.69%
Yandex Mail1.06%
Yahoo Mail0.72%- …Others3.1%
Email & Webmail
FAQ.
What is Email & Webmail software?
Email & Webmail covers the tools a site can load or configure to handle this part of its stack. We detect one of the 31 email & webmail tools in this category on 8,867,796 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 & webmail platforms?
Across 8,867,796 detected sites, the most widely found email & webmail tools are: Microsoft 365 (45.39% share, 4,024,892 sites), Google Workspace (43.59% share, 3,865,837 sites), Apple iCloud Mail (4.41% share, 391,184 sites). Others we see regularly include Titan Email and Yandex Mail.
Which email & webmail tool has the largest market share?
Microsoft 365 is the most widely detected email & webmail tool at 45.39% share, on 4,024,892 sites. The largest share of those sites belongs to Construction companies, and to businesses in the 1-10 employee band.
Which industries use email & webmail software the most?
The industries with the most detected sites in this category are Construction, IT Services and IT Consulting, Business Consulting and Services, Advertising Services, Real Estate. 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 & webmail tools?
We detect the most email & webmail sites in United States, United Kingdom, Australia, Canada, Germany. 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 & webmail platform?
Start from your own size, industry and primary use case rather than from share. Microsoft 365, Google Workspace and Apple iCloud Mail 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 & webmail software?
TechnologyChecker.io detects email & webmail tools on 8,867,796 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.