Yes, both Notifia and Proof offer a Free Trial.
Notifia is designed for Large Enterprises, Medium Business and Small Business.
Proof is designed for Medium Business and Small Business.
Pricing for Notifia Starts at $9/Month whereas for Proof Starts at $26/Month when Billed Yearly.
Some top alternatives to Notifia includes Proof Factor, Fomo, Proof, TrustActivity, ProveSource, Fizfy, Nudgify, WiserNotify, Trustpulse and Nextsale.
Some top alternatives to Proof includes and undefined.