diff --git a/README.md b/README.md
index 4c6d731..7a07cbd 100644
--- a/README.md
+++ b/README.md
@@ -113,3 +113,4 @@ by Utilizing Pre-Experiment Data (Microsoft)](https://exp-platform.com/Documents
 * [LaunchDarkly](https://launchdarkly.com/features/experimentation/)
 * [JetLab](https://tryjetlab.com/)
 * [GrowthBook](https://www.growthbook.io/)
+* [SaaS A/B Test Sample Size Calculator](https://trial-to-paid-conversion-sample-size-calculator.vercel.app/)