The best open source alternative to Zety is Reactive Resume, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 50 alternatives to Zety and three of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Zety are HackMyResume (Free, Open Source) and Resumake (Free, Open Source).
Create polished résumés and CVs in multiple formats from your command line or shell. Author in clean Markdown and JSON, export to Word, HTML, PDF, LaTeX, plain text, and other arbitrary formats. Fight the power, save trees. Compatible with FRESH and JRS resumes.