add Ona as powered by NiFi

This closes #26.
diff --git a/src/pages/html/powered-by-nifi.hbs b/src/pages/html/powered-by-nifi.hbs
index df09bbd..2c9ffeb 100644
--- a/src/pages/html/powered-by-nifi.hbs
+++ b/src/pages/html/powered-by-nifi.hbs
@@ -91,6 +91,11 @@
                 <td>Insurance</td>
                 <td>Hastings Group is a fast growing, agile, digitally focused general insurance provider providing services to the UK car, van, bike and home insurance market. We have strong relationships with all major price comparison websites (PCWs) and utilise Apache NiFi to process and ingest millions of items of data.</td>
             </tr>
+            <tr>
+                <td><a href="https://ona.io/">Ona</a></td>
+                <td>International Development and Humanitarian Aid</td>
+                <td>Ona is a software engineering and design firm based in Nairobi, Kenya and Washington, DC. Our mission is to improve the effectiveness of humanitarian and development aid by empowering organizations worldwide with collective and actionable intelligence. We use Apache NiFi to ingest, process, and disseminate global health and service delivery data from diverse sources.</td>
+            </tr>
         </table>
     </div>
 </div>