Microsoft Blockchain on Azure allows companies to deploy distributed ledger applications with minimal blockchain knowledge. Microsoft is the biggest software company in the world, and its BaaS solution has a number of advantages. Clients are able to quickly create a fully configured blockchain network, allowing them to on focus on building their applications. Customers are charged for the storage, networking, and computing resources that they consume.

Dragonchain is a blockchain platform developed by Disney. It was originally called the Disney Private Blockchain Platform. In 2016, Disney made the project open-source and shifted control of it to the Dragonchain Foundation.
It has a hybrid architecture that combines private and public blockchain elements. It's designed to make it easier for enterprises to develop smart contract powered DApps. They aim to facilitate business integration into blockchain.

Blockapps is a Blockchain-As-A-Service company that is part of the ConsenSys portfolio. Their platform provides a development environment that allows DApp creators to run a web app with a blockchain backend.