Umbraco Alternatives for Online

WordPress is an open source content management solution based on PHP maintained by Automattic which is also being offered as hosted solution.

Blogger is a blog-publishing service that allows multi-user blogs with time-stamped entries.

ProcessWire is a free PHP open source CMS with a great API built to save you time and make development fun at any scale.

ImpressPages is an open-source PHP framework with built-in content editor.

concrete5 is an open-source content management system (CMS) for publishing content on the World Wide Web and intranets.

Tiki Wiki CMS Groupware or simply Tiki, originally known as TikiWiki, is a free and open source Wiki-based content management system and online office suite written primarily in PHP.

Weebly is a web-hosting service featuring a drag-and-drop website builder.

django CMS is a free and open source content management system platform for publishing content.

Squarespace is a SaaS-based content management system-integrated website builder, blogging platform, hosting service and domain name registrar.

Redaxscript is a modern, ultra lightweight and rocket fast Content Management System.

SilverStripe is a free and open-source Content Management System (CMS) and framework for setting up and maintaining websites and web applications.

Textpattern is a free and open-source content management system (CMS) based on PHP and MySQL.

Fork is an easy to use open source CMS using Symfony Components.

Grav is an easy to use, yet powerful, opensource CMS that requires no database.

LiveJournal is a Russian social networking service.

Contao (TYPOlight) is a free content management system (CMS) for medium to large websites.

Web Start Today is a premium Do-It-Yourself (DIY) website builder.

CMS Made Simple (CMSMS) is a free, open source (GPL) content management system (CMS) to provide developers, programmers and site owners a web-based development and administration area.

TYPO3 is a free and open source web content management system written in PHP.

ExpressionEngine is a flexible, feature-rich content management platform.

uCoz is a free web hosting with a built-in content management system.

Novius OS is a content management system (CMS) open source.

Cargo makes tools to design and build unique websites.

Habari is a free and open source blog engine written in PHP and currently supports MySQL, SQLite and PostgreSQL for the database backend.

postach.io turns an Evernote notebook into a blog or website.

ALLYOU is an online portfolio building platform.

Craft CMS is a content management system for developers, designers, and web professionals that blends flexibility, power, and ease of use for clients.

Pimcore provides free and open-source customer experience management, digital asset management, product information management, multi-channel publishing and e-commerce software.

blogstrap.py is a simple Blog using web.py and bootstrap3.