When comparing Eleventy vs Nikola, the Slant community recommends Nikola for most people. In the question“What are the best static site generators?” Nikola is ranked 10th while Eleventy is ranked 23rd. The most important reason people chose Nikola is:
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.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
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)
Cons
Con Introduces breaking changes between major versions.
Ok, it's beta software, I guess, though it is 2-3 years old? Still less than v1.0.0. But still, they introduce breaking changes in a patch or minor level bump? Not even documented, discussed, or acknowledged in bug reports.
Con Not well documented.
There is some documentation. But the current capabilities are not well documented. Common use cases are not explained. The documentation is self-contradictory. Changes to code functionality not reflected in documentation.