SpiderOak
SpiderOak is a US-based collaboration tool, online backup and file hosting service that allows users to access, synchronize and share data using a cloud-based server, offered by a company of the same name. Its first offering, its online backup service later branded "SpiderOak ONE", launched in December 2007. SpiderOak is accessible through an app for Windows, Mac and Linux computer platforms, and Android, N900 Maemo and iOS mobile platforms. According to SpiderOak, the software uses encrypted cloud storage and client-side encryption key creation, so SpiderOak employees cannot access users' information. SpiderOak differentiates itself from its competition by this kind of encryption, in provision for syncing files and folders across multiple devices, and in automatic de-duplication of data. Some components of SpiderOak are open-source; in 2009, the company announced its intent for the SpiderOak One client's code to be fully open-source in the future. As of 2016, the SpiderOak One client's source code is only available open-source for mobile platforms, with no current plans to make the desktop client's code open-source. SpiderOak used to provide an open-source password manager named Encryptr, which was discontinued in March 2021. The source code for SpiderOak's group messaging application Semaphor is published to allow auditing. (Wikipedia).
