HubSpot CRM vs Zendesk Sell: Which is best for you?

Overall, Hubspot is a great tool for a $1m+ business that is looking to increase functionality in their business as it relates to customer service, lead acquisition and management, product delivery, taking payments, and more.

Also, it is not the best for Email Marketing Campaigns for some reason that is beyond my understanding. If you compare that functionality, in my experience, Outreach (again, for some reason beyond my understanding) can send massive amounts of emails, without compromising the company's email domain.

The software is good in managing sales, I like the report making which you can use to create a report that can be exported for offline reading and analyzing of sales data

Cannot use it alone, it has to integrate with other Zendesk products, but only with Zendesk products. And customisation can be a real headache, as it needs to be completely setup before getting its full potential.