Mailbrew is described as 'helps you keep up with your favorite topics through automated newsletters using multiple sources like Reddit, YouTube, Twitter, RSS feeds and more. Simply pick your sources and create your own digests with ease'. There are seven alternatives to Mailbrew for Online / Web-based and SaaS. The best alternative is Blogtrottr, which is free. Other great apps like Mailbrew are Feedbutler (Free), Feedsub.com (Free), BlogInMail (Paid) and RSSMailer (Freemium).
Turn your websites into a daily digest. BlogInMail helps you keep up with your favorite blogs and websites through a simple daily email that combines any new updates from any website you follow, including Twitter profiles and blogs.