OpenStax vs zyBooks

OpenStax is a nonprofit education initiative of Rice University that publishes free, openly licensed textbooks and related materials for introductory courses. Subject matter experts write the textbooks, which are peer-reviewed for accuracy and updated regularly. Books can be read online on the web, Android or iOS, or downloaded as free PDFs; low-cost print editions are also offered. Most titles are accessible without an account, although a small number require sign-in. Students can highlight, take notes and create study guides, with a free student account required for some features. Educators with a free account can access test banks, PowerPoint slides, solutions manuals and customization tools. OpenStax Assignable lets instructors assign readings, assessments and supporting materials through an LMS, with automatic grading and gradebook synchronization. It supports LTI 1.3 and Blackboard, Canvas, D2L Brightspace and Moodle. Textbooks cost nothing. Assignable starts at $15, paid once, billed per student per semester; instructors use it free, and a two-week trial begins on the first day of access. Institutional pricing is by contact.

zyBooks is interactive digital courseware designed as an alternative to textbooks in STEM courses. Instructors can add custom content, create sections and chapters, and set course content and pacing. LMS integration is optional: zyBooks supports LTI 1.3 single sign-on and grade passback, with documentation for Canvas, Blackboard, Brightspace, and Moodle; activity scores can also be downloaded as CSV files. Security course materials include labs for practicing malware creation, network analysis, and vulnerability assessment. The maker describes accessibility against WCAG 2.2 A/AA, Revised Section 508, and EN 301 549, and offers accessibility modes and chapter PDFs. Access is by paid subscription, with a free evaluation available to instructors.