As Sentinel has created their blockchain within the Cosmos ecosystem and enjoys the benefits Cosmos has to offer. It’s also build on top of Tendermint. Building a blockchain from the ground up requires building all three layers: Networking, Consensus, and Application. This takes a lot of development time to take care of and this is where Tendermint comes in. It basically takes care of the networking and consensus layer. Saving a lot of development on these two layers gives developers more time to focus on the application layer realizing the actual product they want to create. They can write the application in any language and use the Tendermint Core to replicate it on many machines across the world.
To learn more about Tendermint visit there website.