Zendesk Support offers Free Trial, but Brevo does not.
Zendesk Support is designed for Large Enterprises, Medium Business and Small Business.
Brevo is designed for Individuals, Freelancers, Large Enterprises, Medium Business and Small Business.
Pricing for Zendesk Support Starts at $19/user/month when yearly whereas for Brevo Starts at $8.08/month when yearly.
Some top alternatives to Zendesk Support includes Zoho Desk, ManageEngine ServiceDesk Plus, Deskero, Support Hub, HelpDesk, Desky, Help Scout, Salesforce Service Cloud, ReadyDesk, Sitehelpdesk, HESK and BoldDesk.
Some top alternatives to Brevo includes Pipedrive, Campaigner, Moosend and SMTP.