'''Sails.js''', (or simply '''Sails'''), is thea most popular[[Model–view–controller|Model-View-Controller]] (MVC) [[web application framework]] fordeveloped atop the [[Node.js]] environment,<ref>{{Cite book|url=https://books.google.com/books?id=01hLDAAAQBAJ|title=Sails.js Essentials|last=Shahid|first=Shaikh|publisher=Pakt|year=2016|isbn=9781783554546|___location=Birmingham, UK|pages=|oclc=944986529|via=Google Books (Preview)}}</ref>{{Rp|1}} released as [[free and open-source software]] under the [[MIT License]]. It is designed to make it easy to build custom, enterprise-grade Node.js [[web application]]s and [[API]]s.<ref name="SailsJS">{{cite web|url=https://sailsjs.com|title=Sails.js home page}}</ref> Emulating the MVC architecture of other frameworks, like Ruby on Rails, it offers similar pattern and familiarity, reducing the cognitive burden when switching between other frameworks/languages.
