Yes, both InboxPro and Consider offer a Free Trial.
InboxPro is designed for Large Enterprises, Medium Business and Small Business.
Consider is designed for Freelancers, Medium Business and Small Business.
Pricing for InboxPro Starts at $7.49/User/Month when Billed Yearly whereas for Consider Starts at $10/User/Month.
Some top alternatives to InboxPro includes GMass, AutoPitch, SmartWriter, Mixmax, Ghostwrite, Qualified, SmartReach.io, Workvivo, Sigmail, IFTTT and Consider.
Some top alternatives to Consider includes Salesforce Email Studio, Gist, automation.re, Qualified, Workvivo, InboxPro, Flowall, Pascal Workflow, Sociocs, Drag, Quickflow and Loop Email.