Meteor is described as 'set of new technologies for building top-quality web apps in a fraction of the time' and is an app in the Development category. There are more than 50 alternatives to Meteor for a variety of platforms, including Mac, Windows, Linux, Online / Web-based and Self-Hosted solutions. The best alternative is ExpressJS, which is both free and Open Source. Other great apps like Meteor are Ruby on Rails (Free, Open Source), GUN (Free, Open Source), RxDB (Free, Open Source) and remoteStorage (Free, Open Source).
An open protocol for per-user storage OWN YOUR DATA Everything in one place – your place. Use a storage account with a provider you trust, or set up your own storage server. Move house whenever you want. It's your data.
5apps helps both developers and users to get the most out of the Web as a software platform. 5apps Deploy is a turn-key deployment and hosting platform for client-side web apps. 5apps Storage is a new kind of cloud storage for the Web, based on an open protocol.
Realm enables any development team, no matter the size, to include difficult-to-build features like two-way data sync and realtime collaboration. Devote more time to what makes your app truly unique and less time to maintaining services.
deepstream.io is a clusterable realtime server that handles persistent tcp and websocket connections. It offers data-sync, pub/sub and request/response. It's available for Linux, Mac and Windows and comes with clients in JS, Java and many others.