{"id":41246,"date":"2022-01-07T12:40:41","date_gmt":"2022-01-07T17:40:41","guid":{"rendered":"https:\/\/www.litmus.com\/?p=41246"},"modified":"2025-12-11T11:47:18","modified_gmt":"2025-12-11T16:47:18","slug":"email-client-market-share-december-2021","status":"publish","type":"post","link":"https:\/\/www.litmus.com\/blog\/email-client-market-share-december-2021","title":{"rendered":"Email Client Market Share in December 2021: Is MPP Adoption Slowing Down?"},"content":{"rendered":"\n\n\t
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New year, same us\u2014we\u2019re back! It\u2019s time for our monthly recap of email client market share where we look back at what shifts took place for the previous.<\/p>\n

What happened in December 2021? Let\u2019s take a closer look.<\/p>\n

Top email clients<\/h2>\n

Before we begin, we\u2019d like to recall that a few months ago, we introduced a new grouping for Apple clients<\/a> that nests Apple iPhone (iOS Mail), Apple Mail (macOS Mail), Apple iPad (iPadOS Mail), and Apple Mail Privacy Protection (MPP-impacted opens) under the category \u201cApple\u201d. To learn why, check out this blog post<\/a>.<\/p>\n

And\u2014as we always like to note\u2014there are two things we\u2019d like to point out: 1) MPP hides device data so we can\u2019t differentiate between iOS, iPadOS, or macOS, and 2) the new OSes also don\u2019t differentiate between MPP and non-MPP in the user agent data it passes.<\/p>\n

That said, the top 3 email clients for December 2021 are Apple, Gmail, and Outlook.<\/p>\n\"Top\n

    \n
  1. Apple: 57.4%<\/li>\n
  2. Gmail: 30.4%<\/li>\n
  3. Outlook: 4.1%<\/li>\n
  4. Yahoo Mail: 2.5%<\/li>\n
  5. Google Android: 2.0%<\/li>\n
  6. Outlook.com: 1.0%<\/li>\n
  7. Samsung Mail: 0.4%<\/li>\n
  8. Windows Live Mail: 0.1%<\/li>\n
  9. Web.de: 0.04%<\/li>\n
  10. GMX: 0.04%<\/li>\n<\/ol>\n

    Apple\u2019s overall market share went up over three percentage points, from 54.2% to 57.4%. As a result, the rest of the email clients are seeing a slight decrease. Gmail dropped from 31.6% to 30.4%, and Outlook from 4.7% to 4.1%.<\/p>\n

    Let\u2019s take a closer look at what\u2019s happening with Apple:<\/p>\n

      \n
    1. Apple Mail Privacy Protection: 41.0%<\/li>\n
    2. Apple iPhone (iOS Mail): 10.7%<\/li>\n
    3. Apple Mail (macOS Mail): 5.0%<\/li>\n
    4. Apple iPad (iPadOS Mail): 0.6%<\/li>\n<\/ol>\n

      Apple Mail Privacy Protection\u2019s share continues to climb, which isn\u2019t a surprise as Apple\u2019s Mail Privacy Protection (MPP) adoption increases. In October, Apple Mail Privacy Protection was at 14.4%<\/a>, and in November 2021 it grew to 26.2%<\/a>\u2014a near 82% increase. As for December, Apple Mail Privacy Protection\u2019s share was 41%\u2014nearly a 57% increase from the previous month. As the growth from month-to-month slows down a bit, we\u2019re wondering: Could MPP adoption be normalizing?<\/p>\n

      As a result, Apple iPhone (iOS Mail) decreased its share from 20.51% to 10.72%, as did Apple Mail (macOS Mail) from 6.79% to 4.96% and Apple iPad (iPadOS Mail) from 0.74% to 0.64%.<\/p>\n

      Want more data and trends? Check out our new and improved email client market share<\/a> site, which includes Apple\u2019s Mail Privacy Protection (MPP) data, pre- and post-MPP launch.<\/p>\n

      Opens by environment<\/h2>\n

      Although MPP launched in September 2021, the data we\u2019re able to see on MPP with Litmus Email Analytics<\/a> is considered early data. December 2021 marks the fourth month we\u2019ve been tracking MPP stats.<\/p>\n\"Opens\n

        \n
      1. Apple Mail Privacy Protection: 40.6%<\/li>\n
      2. Webmail: 35.6%<\/li>\n
      3. Mobile: 13.7%<\/li>\n
      4. Desktop: 9.1%<\/li>\n
      5. Other: 1%<\/li>\n<\/ol>\n

        Apple Mail Privacy Protection has now taken the top spot for reading environment, surpassing webmail which was traditionally in the lead. As we mentioned earlier, MPP adoption will continue to increase as time passes.<\/p>\n

        We watched this closely over the past few months. To recap what happened<\/a>: from September to October, Apple Mail Privacy Protection\u2019s share grew from 6.6% to 14.2% (a 115% increase). Then from October to November, we also saw a smaller jump, from 14.2% to 25.9% (an 82% increase). From November to December, we saw an increase too, though less significant\u2014from 25.9% to 40.6% (a 57% increase). Month-to-month growth appears to be slowing down here too when we look at opens by environment, a trend we pointed out earlier when looking at Apple clients.<\/p>\n

        Most popular mobile opens<\/h2>\n

        When looking at mobile opens, the top 3 remain the same, as it has for months prior.<\/p>\n\"Most\n

          \n
        1. Apple iPhone (iOS Mail): 77.6%<\/li>\n
        2. Google Android: 14.5%<\/li>\n
        3. Apple iPad (iPadOS Mail): 4.6%<\/li>\n<\/ol>\n

          In December, we\u2019re seeing similar shifts to what we saw in November. Apple saw a small decrease (from 85.5% to 77.6%), while Google Android and Apple iPad saw some growth, from 9.3% to 14.5% and 3.1% to 4.6%, respectively.<\/p>\n

          Most popular webmail opens<\/h2>\n

          What about webmail? The top 3 webmail clients are still Gmail, Yahoo Mail, and Outlook.com.<\/p>\n\"most\n

            \n
          1. Gmail: 89.6%<\/li>\n
          2. Yahoo Mail: 7.2%<\/li>\n
          3. Outlook.com: 2.9%<\/li>\n<\/ol>\n

            Similar to last month, not much has happened aside from Gmail increasing slightly, from 89.2% to 89.6%. Yahoo Mail fell a small amount, from 7.4% to 7.2%, while Outlook.com also dropped, from 3.2% to 2.9%.<\/p>\n

            Wondering why we categorize Gmail as webmail? Learn how Gmail opens are reported in Email Analytics<\/a>.<\/p>\n

            Most popular desktop opens<\/h2>\n

            The same story goes for desktop: the top 3 remain the same, with Apple Mail (macOS Mail) at the top, followed by Outlook in second, and Windows live mail in third.<\/p>\n\"Most\n

              \n
            1. Apple Mail (macOS Mail): 54%<\/li>\n
            2. Outlook: 44.7%<\/li>\n
            3. Windows Live Mail: 1.1%<\/li>\n<\/ol>\n

              We\u2019re continuing to see a decrease with Apple Mail (macOS Mail), in line with the decrease we saw when looking at each Apple email client. As for Outlook, its share grew from 40.4% to 44.7%. Windows Live Mail has been growing slowly but steadily by 0.1% over the past few months, but in December, it grew by 0.2 percentage points.<\/p>\n

              Light Mode vs. Dark Mode opens<\/h2>\n

              Dark Mode usage became available for us to track a few months ago, starting in September 2021. Something we\u2019d like to note: Our Dark Mode data is based only on the Apple Mail app for iOS 13, macOS 13, iOS 14, macOS 14, iPadOS 14, iOS 15, iPadOS 15, and Apple Mail privacy-impacted devices.<\/p>\n\"Light\n

                \n
              1. Light Mode: 74.3%<\/li>\n
              2. Dark Mode: 25.7%<\/li>\n<\/ol>\n

                Light Mode continues to reign as the popular setting, with 74.3% of all emails being opened in a light mode setting in December 2021. Over the course of our tracking, its usage has fluctuated within a small range, anywhere from 73% to 75%. For example, Light Mode was 73.7% in September, 74.4% in October, and 73.1% in November. In December, it\u2019s back up at 74.3%, with Dark Mode at 25.7%.<\/p>\n

                Get to know your<\/i> audience<\/h2>\n

                While email client market share provides powerful insights about the industry as a whole, the true value lies with your<\/i> audience. Get to know your<\/i> subscribers, and use email client market share as a supplementary tool in your arsenal.<\/p>\n

                Over time, small shifts lead to big changes. Stay tuned next month as we share our findings and continue to track the impact of MPP.<\/p>\n

                Where did we get all this data?<\/strong> Our email client market share stats are pulled from over a billion email opens, anonymously collected and aggregated with Litmus Email Analytics<\/a> from November 1-30, 2021. It highlights global trends across all industries and verticals. Some email clients may be over- or under-represented, particularly with mobile and webmail. This is due to image blocking or image caching, most notably with Gmail. Still curious? Learn how we get this data<\/a>.<\/p>\n

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                \"apple-mail-audience\"<\/td>\n\n

                Get insights into <\/b>your<\/i><\/b> audience\u2014with Litmus Email Analytics<\/b><\/strong><\/p>\n

                Get visibility into your audience\u2014Apple Mail and otherwise\u2014so you can see how much your program is being impacted by MPP, adapt for the future, and continue to create more effective campaigns, faster.<\/p>\n

                Book a demo<\/a><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

                 <\/p>\n \t\t\t<\/div>\n \t\t<\/div>\n \t<\/div>\n <\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

                View the top email clients by email opens from December 2021. And find out how it\u2019s changed and how that affects your email marketing program.<\/p>\n","protected":false},"author":25,"featured_media":41251,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"tags":[10251,681],"blog_category":[57,118],"class_list":["post-41246","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","tag-email-client","tag-email-client-market-share","blog_category-observations","blog_category-stats"],"yoast_head":"\nEmail Client Market Share in December 2021 - Litmus<\/title>\n<meta name=\"description\" content=\"View the top email clients by email opens from December 2021. 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