diff --git a/README.md b/README.md
index 922d8664..6d858865 100644
--- a/README.md
+++ b/README.md
@@ -148,6 +148,7 @@ Say thanks!
 <td>Workato<br><img src="https://edent.github.io/SuperTinyIcons/images/svg/workato.svg" width="125" title="Workato" /><br>489 Bytes</td>
 <td>Sketch<br><img src="https://edent.github.io/SuperTinyIcons/images/svg/sketch.svg" width="125" title="Sketch" /><br>491 Bytes</td>
 <td>Dribbble<br><img src="https://edent.github.io/SuperTinyIcons/images/svg/dribbble.svg" width="125" title="Dribbble" /><br>967 Bytes</td>
+<td>Flattr<br><img src="https://edent.github.io/SuperTinyIcons/images/svg/flattr.svg" width="125" title="Flattr" /><br>347 Bytes</td>
 </tr>
 </table>
 
diff --git a/images/reference/flattr.svg b/images/reference/flattr.svg
new file mode 100644
index 00000000..9346c111
--- /dev/null
+++ b/images/reference/flattr.svg
@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Generator: Adobe Illustrator 22.0.1, SVG Export Plug-In . SVG Version: 6.00 Build 0)  -->
+<svg version="1.1" id="acee6827-fb4f-403b-b377-5b47bf217d61"
+	 xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px" viewBox="0 0 950.5 250"
+	 style="enable-background:new 0 0 950.5 250;" xml:space="preserve">
+<title>flattr-black-full-web</title>
+<path d="M29.5,125c0-56.8,46.1-102.9,102.9-102.9c0.5,0,40.8,0,55.6,0l-29.8,29.8l13.7,13.7l61.5-63H193h-60.7
+	C64.8,2.7,10,57.4,10,125v95.1l19.5-17.9v-1C29.5,198.7,29.5,125.7,29.5,125z"/>
+<path d="M254.7,29.9l-19.5,17.9v1c0,2.5,0,75.5,0,76.2c0,56.8-46.2,102.9-102.9,102.9c-0.5,0-40.8,0-55.6,0l29.8-29.8l-13.7-13.7
+	l-61.5,63h40.3h60.7c67.6,0,122.3-54.8,122.3-122.3V29.9z"/>
+<path d="M368,36.6h97v16.3h-78.9v69.2h67.7v16.3h-67.7v82.6H368L368,36.6z"/>
+<path d="M496.2,36.6h17.8v149.2c0,17.3,7.9,19.9,14.7,19.9c1.5,0,3-0.1,4.4-0.3v16c-2.2,0.3-4.4,0.5-6.6,0.5
+	c-11,0-30.4-3.4-30.4-32.3L496.2,36.6z"/>
+<path d="M632.4,139.4h7.3v-3.4c0-25.4-13.9-34.1-32.8-34.1c-21.8,0-37.2,12.6-37.2,12.6l-8.4-13.6c0,0,17.3-14.9,47-14.9
+	c31.7,0,49.3,17.6,49.3,50.6V221h-17v-14.4c0-3.7,0.2-7.4,0.5-11h-0.5c0,0-11,28.6-44,28.6c-22,0-44.9-12.9-44.9-39.1
+	C551.6,140.4,609.6,139.4,632.4,139.4z M599.3,208.9c25.2,0,40.4-26.2,40.4-49V154h-7.6c-20.7,0-62.2,0.8-62.2,29.9
+	C569.9,196.3,579.6,208.9,599.3,208.9L599.3,208.9z"/>
+<path d="M702.9,105.5h-17.3V90.6h17.6v-38h17.6v38h33.1v14.9h-33v65.6c0,31,19.7,34.9,29.6,34.9c2,0,4-0.2,6-0.5v16
+	c-2.5,0.4-5.1,0.6-7.6,0.5c-15.2,0-45.9-5-45.9-49L702.9,105.5z"/>
+<path d="M790.8,105.5h-17.3V90.6h17.6v-38h17.6v38h33v14.9h-33v65.6c0,31,19.7,34.9,29.6,34.9c2,0,4-0.2,6-0.5v16
+	c-2.5,0.4-5.1,0.6-7.6,0.5c-15.2,0-45.9-5-45.9-49L790.8,105.5z"/>
+<path d="M873.7,89h17.6v23.3c0,5.8-0.5,10.5-0.5,10.5h0.5c6.3-19.9,21-35.1,41.7-35.1c2.4,0,4.8,0.3,7.1,0.8v17.6
+	c-2.2-0.3-4.4-0.5-6.6-0.5c-18.7,0-32.5,14.7-38.3,34.1c-2.5,8.3-3.7,17-3.7,25.7v55.6h-17.8L873.7,89z"/>
+</svg>
diff --git a/images/reference/index.md b/images/reference/index.md
index 8ad07f63..1505e897 100644
--- a/images/reference/index.md
+++ b/images/reference/index.md
@@ -116,3 +116,4 @@ Where possible this links to the organisation's brand guidelines page.
 | <img src="/images/svg/dribbble.svg" width="256" />  | <img src="/images/reference/dribbble-ball-icon.png" width="256" /> | https://dribbble.com/branding |
 | <img src="/images/svg/w3c.svg" width="256" /> | <img src="/images/reference/w3c.png" width="256" />  | https://www.w3.org/Consortium/Legal/logo-usage-20000308 |
 | <img src="/images/svg/google_scholar.svg" width="256" /> | <img src="/images/reference/google_scholar.ico" width="32" />  | https://scholar.google.com/ |
+| <img src="/images/svg/flattr.svg" width="256" /> | <img src="/images/reference/flattr.svg" width="32" />  | https://commons.wikimedia.org/wiki/File:Flattrlogo250.svg |
diff --git a/images/svg/flattr.svg b/images/svg/flattr.svg
new file mode 100644
index 00000000..45b244dd
--- /dev/null
+++ b/images/svg/flattr.svg
@@ -0,0 +1,6 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+aria-label="Flattr" role="img"
+viewBox="0 0 512 512"><rect
+width="512" height="512"
+rx="15%"
+fill="#FFF"/><path d="M112 254c0-77 63-140 141-140h76l-41 40 19 19 84-86H252c-92 0-167 75-167 167v131l27-25v-1-105zM420 124l-27 25v105c0 78-63 141-141 141h-76l41-40-19-19-84 86h138c93 0 168-75 168-167V124z"/></svg>
\ No newline at end of file
diff --git a/radius.html b/radius.html
index 3f09a1de..bf33faa0 100644
--- a/radius.html
+++ b/radius.html
@@ -85,7 +85,7 @@
 			'workato',    'sketch',      'vlc',        'google_maps','access',       'ethereum',
 			'opencast', 'stackexchange', 'qq',         'vegetarian', 'gogcom',       'strava',
 			'ko-fi',      'untappd',     'vivino',     'apereo',     'hackerone',    'imgur',
-			'bitwarden',  'bandcamp',    'dribbble',   'w3c', 'google_scholar'
+			'bitwarden',  'bandcamp',    'dribbble',   'w3c', 'google_scholar',      'flattr'
 		 ];
 
 		var container = document.querySelector('.icons');