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