Crash tested kennel for small dogs

I’m looking for a crash tested kennel for my two small dogs and I’m not sure what to get. I see a lot of talk about the sleepypod, but I don’t know of any other good brands to look into. I do not want a harness. Also, what is the different between a crash tested kennel and a crash tested carrier? Is a kennel better to have than a carrier?

Thank yall!