The best alternatives to ChurnSDK are Look back, ChurnKit, and Churndown. If these 3 options don't work for you, we've listed a few more alternatives below.
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Hex— Smarter analysis, faster data science with a little AI Magic
You invest a lot to acquire new customers, make them signup and add your JS snippet to their website - that's amazing!!! But, what if they removed it 5 minutes later? You lost them and you didn't even know that...