Hey Jasmine, good question - I just realized this isn’t mentioned in the app!

You can add up to 8 variations for a broadcast/newsletter. Any more than that, and you will likely struggle to get statistical significance from the test. Here’s what it looks like when you add variants in the content tab when building your broadcast:

Hope that answers your question! I’ve actually never used all 8 splits for one test, so if you have chance to share what you’re testing with this many variants it would be cool to hear what you’re doing :) 

Cheers!