Bitter is a serif font. It goes well with Open Sans, Source Sans Pro, Gotham and Helvetica Neue. If you're thinking about using Bitter then try 26px for headers. Give 20px a shot for content.

People commonly tag it as blog, writing, design, agency, app, portfolio, marketing, tech, designer and code. You can get it from Font Squirrel and Google Web Fonts.

In action

6 Bitter samples