S2 is described as 'Object storage has been nothing short of revolutionary. S3 broke ground in 2006 with simple storage operations on named objects – and 18 years later, S3 Express One Zone even allows appends. But ultimately, object storage is all about blobs and byte ranges' and is an app in the backup & sync category. There are more than 10 alternatives to S2 for a variety of platforms, including Mac, Linux, SaaS, Self-Hosted and Web-based apps. The best S2 alternative is Talend, which is free. Other great apps like S2 are Drasi, Apache Spark, Fluvio and Apache Hadoop.