How about lark suite, I haven't tried, but have been meaning to, I'd you're happy with Gmail, Zoho, I'd say it's equivalent.

I like infomaniak with their UI, although if you are not in Europe it's hard to sign up and I'd love to finally sign up to purely mail, but Cloudflare email forwarding covers what I need.

Here's an outdated list. https://www.reddit.com/r/gsuitelegacymigration/s/xsimVL9oJA