What's your favorite newsletter platform? Beehiiv or Substack?

Hey PH 👋

I'm about to start a new newsletter for SaaS founders, indie hackers, and marketing folks.

Trying to decide between Beehiiv and Substack for the launch.

If you've run a newsletter before, I'd love to hear:

Which platform do you use?

Why did you choose it?

Anything you wish you knew before starting?

Open to other suggestions too. Curious what's working for you all right now.