Oracle Blockchain Cloud Service is described as 'A comprehensive distributed ledger cloud platform to provision blockchain networks, join other organizations, and deploy & run smart contracts to update and query the ledger' and is an website in the Bitcoin & Cryptocurrency category. There are four alternatives to Oracle Blockchain Cloud Service, not only websites but also apps for a variety of platforms, including SaaS, Windows, Android and iPhone. The best alternative is IBM Blockchain. It's not free, so if you're looking for a free alternative, you could try Blockbook. Other great sites and apps similar to Oracle Blockchain Cloud Service are ChainZilla.io (Paid, Open Source) and AWS Blockchain Templates (Paid).
Blockbook™ leverages Blockchain Technology, to provide you with Smart Contracts, Semi-Decentralized Cloud and a Manipulation/Tamper-Proof history and storage of your data and documents, via Blockchain Posting and Timestamping for FREE!.