When comparing Nikola vs Assemble, the Slant community recommends Assemble for most people. In the question“What are the best static site generators?” Assemble is ranked 14th while Nikola is ranked 20th.
Ranked in these QuestionsQuestion Ranking
Pro HTML input
Nikola posts may be written in a variety of formats. You can write posts in HTML, with all the expressive power of HTML and CSS, and still have the benefits of a site-wide theme and navigation structure.
Pro Host on any web server
Nikloa sites are static files, and thus may be hosted on any web server that allows you to upload your own files. This lets you use simple and inexpensive hosting providers and still have a reliable site.
Pro Write in reStructuredText and Markdown
You have better choices for markup than raw HTML.
Pro Free open-source software (MIT license)
Pro No dependencies on Ruby, Python... just JavaSctipt!
Pro Built on node.js
Pro Powered by a popular template engine Handlebars
Handlebars is the default template engine for Assemble, but you can add any template any you want.
Pro Highly customizable
Pro Markdown support
Pro Highly extensible
Assemble can be extended with plugins/middleware, helpers and mixins.
Pro Nested layout support
Assemble makes it easy to work with layouts. Layouts are used to "wrap" pages with common page elements, such as a header, footer etc. You can even nest layouts!
Pro Use mainstream build tools Grunt or Gulp
Con Documentation can be hard to navigate
Especially for someone new to Assemble, it can be difficult to find what you're looking for in the documentation.