Both are legitimate. The right answer depends on how you work.
HOSTING EMAIL SUITS YOU IF
You need mailboxes at your domain and little else The team is small Volume is ordinary business correspondence Cost matters and the included mail is adequate You are comfortable setting up mail clients
A DEDICATED PROVIDER SUITS YOU IF
You need shared calendars, documents and video meetings You have a larger team and need central administration You send high volumes and deliverability is commercially critical You want mobile device management and central security policy You need very large mailboxes
THE HONEST COMPARISON
Hosting mail delivers reliably when SPF, DKIM and DMARC are correct. Most deliverability complaints trace to missing authentication rather than to the platform.
What hosting mail does not provide is the collaboration layer. If that is what you actually need, a provider is worth the cost. If you only need addresses at your domain, it is not.
ASK US
Describe your team and volume in a ticket and we will give you an honest view.