Yes, both Riverside.fm and Zencastr offer a Free Trial.
Riverside.fm is designed for Large Enterprises, Medium Business and Small Business.
Zencastr is designed for Individuals, Large Enterprises, Medium Business and Small Business.
Pricing for Riverside.fm Starts at $7.50/Month when Billed Yearly whereas for Zencastr Starts at $18/Month when Billed Yearly.
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.
Some top alternatives to Zencastr includes StreamYard, SquadCast, Spreaker, Buzzsprout, Qualified, Workvivo, Riverside.fm, Anchor, Sounder, Casted and intrakt.