Stuck Rocket IPA w/ mostly Apollo and Atlas hops, but a bit of a Cluster addition at flame out...and, this time, no Challenger or Columbia

[Assuming that you're referring to Sierra Space and their https://en.wikipedia.org/wiki/Dream_Chaser#Crewed_version]

Note that the Crew version still seems to be aspirational. And the base-model Cargo version isn't exactly flying in the fast lane, either - "[first] demonstration mission is planned for launch no earlier than 2025."

And note that it took SpaceX almost 10 years to go from Demo-1 of their Cargo Dragon to Demo-1 of their Crew Dragon.

Sierra's Dream Chaser Cargo System variant was due to launch on the second Vulcan test flight this year, but it was recently announced that it wouldn't be ready for that. It's now vaguely scheduled for 2025.

The crew version of Dream Chaser is kinda on hold as they try to get the cargo version flying (they say they're still working on it, but I guess the cargo version is first priority): it'll take a bunch of work to get it completed and certified, but it should be less than starting from scratch.

Once flying, they've got a NASA contract to run 6 resupply missions to the ISS (assuming they can get it flying in time before ISS is deorbited), plus a single flight contract with the UN (!)

Both Dream Chaser and Starliner are proposed as crew transports for Blue Origin's Orbital Reef station.