Once you register at Exotel, you get a trial account. Your trial account is loaded with ₹500 worth of credits which you can use to test the features. Unfortunately, ₹500 worth of credits can be used only inside Exotel and cannot be used, for example, to buy groceries :)
The aim of the free credits in your Exotel account is to ensure you are able to test out all of our features to your heart's content before deciding to take the plunge.
How do you know if you have a trial account? If you have never paid, then you are on trial.
I have an Exotel Trial Account. How do I test it out? (or) How do I get started with my Exotel Trial account
Also, You will be seeing below banner when you have logged into the trial account,
If you need more credits for testing, Use the "Support" widget at the bottom of the screen to tell us.