Compose.io
Compose is a private, Database-as-a-Service (DBaaS) platform for securely hosting and managing shared and dedicated MongoDB instances. Compose is used by a majority of the cloud hosting service Heroku's MongoDB users, being the only remote Mongo host for over a year. History. Compose is an alumnus of the Y Combinator business incubator, Summer 2011 class. In July 2011, Compose announced it received its first round of angel investment of $417,000 from Y Combinator, Lerer And SV Angel. Shortly thereafter, MongoHQ acquired the competing Mongo host and automated provisioning software of MongoMachines. Compose currently integrates  with 4 PaaS providers, with more slated in the future. They were named #4 in the top "10 Enterprise Cloud App Services of 2011" by "Read Write Web". In August 2014, Compose renamed their company from MongoHQ. In July 2015, Compose was acquired by IBM