When comparing Harp vs JBake, the Slant community recommends JBake for most people. In the question“What are the best static site generators?” JBake is ranked 26th while Harp is ranked 29th. The most important reason people chose JBake is:
Localhost server is included and can be used to preview content during editing process.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Compiles assets on request
Rather than regenerate the whole site when a file changes, Harp only reloads what is necessary, keeping the compile time fast.
Pro Supports popular languages
Harp supports a large variety of languages, including Jade, CoffeeScript, Stylus and Sass. See the full list here.
Pro Server included
Localhost server is included and can be used to preview content during editing process.
Pro Blog Aware
RSS feed, archive and tag support. Posts/Topics are a first-class citizen in jbake.
Pro Runs on / Control from the JVM
The site generator is just a specific usage of the JBake Java API. As such, jbake is easily integrated into other JVM software.
Pro Typical inputs
Markdown, asciidoc, plain HTML is supported
Pro Open Source (MIT License)
boosts permissive MIT License.
Cons
Con Limited extensibility
There are no plugins available to extend the functionality or language support of Harp.
Con Runs on the JVM
JVM is a double-edged sword (startup time, memory usage, CPU overhead, ...) which might be considered overkill for a static site generator.