A Summary: RaNA-Seq is a cloud platform for the rapid analysis and visualization of RNA-Seq data. It performs a full analysis in minutes by quantifying FASTQ files, calculating quality control metrics, running differential expression analyses and enabling the explanation of results with functional analyses. Our analysis pipeline applies generally accepted and reproducible protocols that can be applied with two simple steps in its web interface. Analysis results are presented as interactive graphics and reports, ready for their interpretation and publication.