diff --git a/README.md b/README.md
index 4cf88dc9..350cbb66 100644
--- a/README.md
+++ b/README.md
@@ -144,6 +144,7 @@ Table of Contents
   * [stackahoy.io](https://stackahoy.io) — 100% free. Unlimited deployments, branches and builds
   * [travis-ci.org](https://travis-ci.org/) — Free for public GitHub repositories
   * [wercker.com](http://wercker.com/) — Free for public and private repositories
+  * [semaphoreci.com](https://semaphoreci.com/) — 100 private builds/month, unlimited for Open Source
   * [shippable.com](https://app.shippable.com/) — 150 private builds/month, free for 1 build container, private and public repos
   * [appveyor.com](http://www.appveyor.com/) — CD service for Windows, free for Open Source
   * [github.com](https://github.com/ligurio/Continuous-Integration-services) — Comparison of Continuous Integration services