Yes, both Upland InterFAX and Nextiva offer a Free Trial.
Upland InterFAX is designed for Large Enterprises, Medium Business and Small Business.
Nextiva is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Upland InterFAX Starts at $9.95/Month whereas for Nextiva Starts at $18.95/User/Month when Billed Yearly.
Some top alternatives to Upland InterFAX includes Nextiva, mFax, HelloFax, eFax, OpenText RightFax Fax Server, eFax Corporate, MyFax, FAX.PLUS, Fax Rocket, Fax.to and iFax.
Some top alternatives to Nextiva includes uContact, Call Center Studio, Grasshopper, Dialpad Contact Center, Vonage Contact Center, RingCentral Contact Center, ipSCAPE and OmniOMS Customer Communication Management Suite.