diff --git a/README.md b/README.md
index 4fbd8d6b..2749182f 100644
--- a/README.md
+++ b/README.md
@@ -84,6 +84,8 @@ Say thanks!
 <td>Mailchimp<br><img src="https://edent.github.io/SuperTinyIcons/images/svg/mailchimp.svg" width="125" title="Mailchimp" /><br>1010 Bytes</td>
 <td>Threema<br><img src="images/svg/threema.svg" width="125" title="Threema" /><br>774 Bytes</td>
 <td>Mattermost<br><img src="images/svg/mattermost.svg" width="125" title="Mattermost"/><br>621 Bytes</td>
+<td>Protonmail<br><img src="images/svg/nameofservice.svg" width="125" title="Protonmail" /><br>438 Bytes</td>
+
 </tr>
 </table>
 
diff --git a/images/reference/index.md b/images/reference/index.md
index 5241339e..042b649c 100644
--- a/images/reference/index.md
+++ b/images/reference/index.md
@@ -180,8 +180,9 @@ Where possible this links to the organisation's brand guidelines page.
 | <img src="/images/svg/orcid.svg" width="256" /> | <img src="/images/reference/orcid.png" width="256" />  | https://orcid.org/ |
 | <img src="/images/svg/javascript.svg" width="256" /> | <img src="/images/reference/javascript.png" width="256" />  | https://commons.wikimedia.org/wiki/File:Unofficial_JavaScript_logo_2.svg |
 | <img src="/images/svg/google_drive.svg" width="256" /> | <img src="/images/reference/google_drive.jpg" width="256" /> | https://developers.google.com/drive/api/v2/branding |
+| <img src="/images/svg/protonmail.svg" width="256" /> | <img src="/images/reference/protonmail.jpg" width="256" /> | https://protonmail.com/media-kit#Logos |
 | <img src="/images/svg/ansible.svg" width="256" /> | <img src="/images/reference/ansible.svg" width="256" />  | https://www.ansible.com/logos |
 | <img src="/images/svg/sentry.svg" width="256"/> | <img src="/images/reference/sentry.svg" width="256" /> | https://sentry.io/branding/ |
 | <img src="/images/svg/microsoft.svg" width="256"/> | <img src="/images/reference/microsoft.png" width="256" /> | https://news.microsoft.com/mssurfacehub_logo_stacked_c-white_rgb/ |
 | <img src="/images/svg/behance.svg" width="256" />	| <img src="/images/reference/behance.png" width="256" />	| https://www.behance.net/ |
-| <img src="/images/svg/gojek.svg" width="256"/> | <img src="/images/reference/gojek.svg" width="256" /> | https://www.gojek.com/id/terms-of-service/ |
+| <img src="/images/svg/gojek.svg" width="256"/> | <img src="/images/reference/gojek.svg" width="256" /> | https://www.gojek.com/id/terms-of-service/ |
\ No newline at end of file
diff --git a/images/reference/protonmail.png b/images/reference/protonmail.png
new file mode 100644
index 00000000..52a723ba
Binary files /dev/null and b/images/reference/protonmail.png differ
diff --git a/images/svg/protonmail.svg b/images/svg/protonmail.svg
new file mode 100644
index 00000000..8f815895
--- /dev/null
+++ b/images/svg/protonmail.svg
@@ -0,0 +1,6 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+aria-label="ProtonMail" role="img"
+viewBox="0 0 512 512"><rect
+width="512" height="512"
+rx="15%"
+fill="#8A90C7"/><g fill="#fff"><path d="M259 77s-108-6-131 114v79s0 12 23 29c28 17 91 68 108 68s74-51 102-69c23-16 23-28 23-28v-79C361 71 259 77 259 77zm68 159H185v-45c11-57 74-57 74-57s57 0 68 57v45z"/><path d="M259 384l-34-12-97-68v120s0 11 17 11h222c11 0 17-11 17-11V304l-97 69-28 11z"/></g></svg>