synnefo is described as 'Synnefo is a complete open source cloud stack written in Python that provides Compute, Network, Image, Volume and Storage services, similar to the ones offered by AWS' and is a Cloud Computing Service in the Backup & Sync category. There are more than 25 alternatives to synnefo for a variety of platforms, including Online / Web-based, Linux, Windows, Mac and SaaS. The best alternative is OpenShift, which is both free and Open Source. Other great apps like synnefo are OpenStack (Free, Open Source), Amazon Web Services (Paid), Microsoft Azure (Paid) and Google App Engine (Freemium).
In 2006, Amazon Web Services LLC (“AWS”), an Amazon.com company, officially began offering developer customers access to in-the-cloud infrastructure services based on Amazon's own back-end technology platform.
Google App Engine is a free* platform for developing and hosting web applications in Google-managed data centers. App Engine offers fast development and deployment; simple administration, with no need to worry about hardware, patches or backups; and effortless scalability.
Internxt Drive is an open-source, zero-knowledge, encrypted cloud storage service based on absolute privacy and security. Internxt cloud uses blockchain technology so people’s data and files are fully encrypted and secure.
Apache's CloudStack is a Project backed by Citrix and designed to be a direct competitor to OpenStack. It is designed to deploy and manage large networks of virtual machines, as a highly available, highly scalable Infrastructure as a Service (IaaS) cloud computing platform.