IBM Cloudant is described as 'NoSQL JSON document store that’s optimized for handling heavy workloads of concurrent reads and writes in the cloud; a workload that is typical of large, fast-growing web and mobile apps' and is a Cloud Hosting service in the online services category. There are more than 25 alternatives to IBM Cloudant, not only websites but also apps for a variety of platforms, including Linux, Self-Hosted, SaaS and Mac apps. The best IBM Cloudant alternative is Heroku. It's not free, so if you're looking for a free alternative, you could try Redis or CouchDB. Other great sites and apps similar to IBM Cloudant are Google App Engine, Amazon Web Services, Valkey and DiceDB.