I've found cal.com to be a more pleasant experience than calendly. The interface looks more polished, it has a ton of integrations and it works really well.

I could in theory self-host it but I'd rather use a service with a proper team to maintain it.

The free tier does everything I need. I'd be more than willing to pay ~€5/month for it to contribute to its sustainability, but there is no paying tier that makes sense to me as an individual an occasional contractor.