Yes, both vMix and Flowplayer offer a Free Trial.
vMix is designed for Large Enterprises, Medium Business and Small Business.
Flowplayer is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Pricing for vMix Starts at $60 whereas for Flowplayer Starts at $25/Month.
Some top alternatives to vMix includes Livestorm, Switcher Studio, BoxCast, StreamYard, Streamlabs OBS, Streamster, Stream Club, Streann Studio, YouStreamer, Present Live and Wisecast.
Some top alternatives to Flowplayer includes JW Player, StreamVoodoo, mpvPlayer, TeamTV, Streamster, Stream Club, Streamfizz, YouStreamer, Streams and api.video.