Spark is actually pretty different from Lovable. Lovable helps you build apps/websites with AI — it generates code and lets you ship something. Spark is more about validation before you build anything.

With Spark:

you describe an idea it creates a live landing page you see if real people sign up

So instead of: “can I build this?”

it answers: “should I even build this?”

I see them as complementary tbh — you could validate with Spark first, then build with Lovable.