There are plenty of good options out there! Many use Cloudflare, though they are another giant. I’ve been happy with dsec and freedns, and would recommend both.

Ive used freedns for over a decade; it’s simple and straightforward. Their free tier is plentiful, and their subscription costs are reasonable.

I recently moved my self-hosted services to dsec so I could better automate SSL certs. It’s been nice and easy too!