Yes, both Publisher Discovery and Affilo offer a Free Trial.
Publisher Discovery is designed for Large Enterprises, Medium Business and Small Business.
Affilo is designed for Individuals, Medium Business and Small Business.
Pricing for Publisher Discovery Starts at $116/Month when Billed Yearly whereas for Affilo Starts at $39/Month.
Some top alternatives to Publisher Discovery includes AffTrack, Post Affiliate Pro, Affiliatise, OffersHub, Affilo, Affiliatics, Sir Filiate, FOSHO AFF, Affistash and AffSync.
Some top alternatives to Affilo includes Post Affiliate Pro, Affiliatise, TUNE, Promocate, iDevAffiliate, Affiliatics, Tapfiliate, Ambassador Referral Marketing, Sir Filiate and Affistash.