diff --git a/README.md b/README.md
index 834b3cb9..f50d4d95 100644
--- a/README.md
+++ b/README.md
@@ -79,6 +79,7 @@ Say thanks!
 <td>LINE<br><img src="https://edent.github.io/SuperTinyIcons/images/svg/line.svg" width="125" title="LINE" /><br>478 Bytes</td>
 <td>Viber<br><img src="https://edent.github.io/SuperTinyIcons/images/svg/viber.svg" width="125" title="Viber" /><br>719 Bytes</td>
 <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>
 </tr>
 </table>
 
diff --git a/images/android-vector-drawable/threema.xml b/images/android-vector-drawable/threema.xml
new file mode 100644
index 00000000..be5f9cb9
--- /dev/null
+++ b/images/android-vector-drawable/threema.xml
@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="512dp"
+    android:height="512dp"
+    android:viewportWidth="512"
+    android:viewportHeight="512">
+
+    <path
+        android:fillColor="url(#a)"
+        android:pathData="M 15 0 L 497 0 Q 512 0 512 15 L 512 497 Q 512 512 497 512 L 15 512 Q 0 512 0 497 L 0 15 Q 0 0 15 0 Z" />
+    <path
+        android:fillColor="#fff"
+        android:pathData="M184.412 327l-81 20 17-69c-17-22-27-50-27-79 0-79 73-143 163-143s163 64 163 143-73 143-163 143c-25 0-50-5-71-14zm25-141h-2c-4 0-7 3-6 7v65c0 4 3 7 7 7h96c4 0 7-3 7-7v-65c0-4-3-7-7-7h-2v-18c0-25-21-46-46-46s-46 21-46 46v18zm74 0h-55v-18c0-15 12-28 28-28 15 0 28 12 28 28v18z" />
+    <path
+        android:fillColor="#3FE669"
+        android:pathData="M 156 378 C 171.463972995 378 184 390.536027005 184 406 C 184 421.463972995 171.463972995 434 156 434 C 140.536027005 434 128 421.463972995 128 406 C 128 390.536027005 140.536027005 378 156 378 Z" />
+    <path
+        android:fillColor="#3FE669"
+        android:pathData="M 256 378 C 271.463972995 378 284 390.536027005 284 406 C 284 421.463972995 271.463972995 434 256 434 C 240.536027005 434 228 421.463972995 228 406 C 228 390.536027005 240.536027005 378 256 378 Z" />
+    <path
+        android:fillColor="#3FE669"
+        android:pathData="M 356 378 C 371.463972995 378 384 390.536027005 384 406 C 384 421.463972995 371.463972995 434 356 434 C 340.536027005 434 328 421.463972995 328 406 C 328 390.536027005 340.536027005 378 356 378 Z" />
+</vector>
\ No newline at end of file
diff --git a/images/reference/Threema_AppIcon_iOS.png b/images/reference/Threema_AppIcon_iOS.png
new file mode 100755
index 00000000..11431f3b
Binary files /dev/null and b/images/reference/Threema_AppIcon_iOS.png differ
diff --git a/images/reference/index.md b/images/reference/index.md
index 9eea6dbd..0514bd1a 100644
--- a/images/reference/index.md
+++ b/images/reference/index.md
@@ -163,3 +163,4 @@ Where possible this links to the organisation's brand guidelines page.
 | <img src="/images/svg/rust.svg" width="256" /> | <img src="/images/reference/Rust_programming_language_black_logo.svg" width="256" />  | https://www.rust-lang.org/policies/media-guide |
 | <img src="/images/svg/clojure.svg" width="256" /> | <img src="/images/reference/Clojure_logo.svg.png" width="256" />  | https://clojure.org/index |
 | <img src="/images/svg/coffeescript.svg" width="256" /> | <img src="/images/reference/coffeescript-logo.svg" width="256" />  | http://coffeescript.org/ |
+| <img src="/images/svg/threema.svg" width="256" /> | <img src="/images/reference/Threema_AppIcon_iOS.png" width="256" />  | https://threema.ch/press-files/5_graphics/1_icons_and_logos.zip |
diff --git a/images/svg/threema.svg b/images/svg/threema.svg
new file mode 100644
index 00000000..786632cc
--- /dev/null
+++ b/images/svg/threema.svg
@@ -0,0 +1,10 @@
+<svg
+xmlns="http://www.w3.org/2000/svg"
+aria-label="Threema" role="img"
+viewBox="0 0 512 512">
+<rect 
+width="512" height="512" 
+rx="15%" 
+fill="url(#a)"/>
+<defs><linearGradient id="a" x1="0%" y1="0%" x2="0%" y2="50%"><stop offset="0%" stop-color="#505050"/><stop offset="100%" stop-color="#323232"/></linearGradient></defs><path d="M184.412 327l-81 20 17-69c-17-22-27-50-27-79 0-79 73-143 163-143s163 64 163 143-73 143-163 143c-25 0-50-5-71-14zm25-141h-2c-4 0-7 3-6 7v65c0 4 3 7 7 7h96c4 0 7-3 7-7v-65c0-4-3-7-7-7h-2v-18c0-25-21-46-46-46s-46 21-46 46v18zm74 0h-55v-18c0-15 12-28 28-28 15 0 28 12 28 28v18z" fill="#fff"/><circle cx="156" cy="406" r="28" fill="#3FE669"/><circle cx="256" cy="406" r="28" fill="#3FE669"/><circle cx="356" cy="406" r="28" fill="#3FE669"/>
+</svg>
\ No newline at end of file