###` Measuring the value of API integrations can be challenging, but it's essential for understanding their impact on your business. To start, gather core data such as retention rates, upgrades, and downgrades to figure out how well your integrations are working. You can collect this data by tracking users who use your API and comparing them to those who don't. By analyzing these metrics, you can gauge the effectiveness of your integration strategy and make informed decisions about future investments. For example, Acuity Scheduling used data from their business intelligence platform to compare active users with and without Zapier integrations, revealing that integrations were sticky and led to higher retention rates. Similarly, Typeform saw a 32% increase in daily sign-ups thanks to Zapier, while Unbounce and Streak also improved adoption by highlighting integration recommendations and adding new features, respectively. By taking a data-driven approach, you can unlock the full potential of your API integrations and acquire stickier, engaged customers who depend on your product.