Yes, both Captivate and Riverside.fm offer a Free Trial.
Captivate is designed for Individuals, Large Enterprises, Medium Business and Small Business.
Riverside.fm is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Captivate Starts at $17/Month when Billed Yearly whereas for Riverside.fm Starts at $7.50/Month when Billed Yearly.
Some top alternatives to Captivate includes Podsite, PodBean, Buzzsprout, Qualified, Workvivo, Moonbeam, Podplayer, Blogcast, Podcastle, Sounder, Podcastpage and Podely.
Some top alternatives to Riverside.fm includes StreamYard, Clips by Riverside.fm, Stream Club, Streann Studio, SquadCast, Rumble Studio, Qualified, Streamfizz, Workvivo, Streamr, Zencastr and RSS.