Full disclosure: I've never used any other enrichment tool. But I was looking for one and Cleanlist appears.

Since, I'm a complete noob in this lead gen world I booked a called with Levon to help me with onboarding. He is just the nicest guy. Not only he helped me onboard, he patiently answered all my (rather stupid) questions.

There's definitely a leaning curve here (or maybe that's just me). But I still feel the UI very polished. And above all the belief of the founder in this product. As others have mentioned, this is a steal LTD.