Yes, both Presshub and Pressbase offer a Free Trial.
Presshub is designed for Large Enterprises, Medium Business and Small Business.
Pressbase is designed for Individuals, Medium Business and Small Business.
Pricing for Presshub Starts at $99/Month whereas for Pressbase Starts at $39/Month when Billed Yearly.
Some top alternatives to Presshub includes PressRush, Agility PR Solutions, Newswire, Meltwater, Mynewsdesk, PR Underground, PressKitHero, Covered Press and PressPilot.
Some top alternatives to Pressbase includes Mynewsdesk, Posted, Superdesk, Speedy Newsletter, Qualified, Workvivo, Blog To Social, Slog, Datanews, Nano, SharpDash and IFTTT.