Open365 vs Professor Messer

A side-by-side look at Open365 and Professor Messer. For an in-depth review of either product, follow the links below.

Open365

Office & Productivity

Open365 is an open-source alternative to Microsoft 365 and Google Workspace, providing core productivity apps like word processing, spreadsheets, presentations, email, calendar, contacts, and more. It is free, customizable, and focused on privacy and data ownership.

opensourceprivacycollaborationdocumentsspreadsheetspresentationsemailcalendarcontacts

Full review → Alternatives

Professor Messer

Education & Reference

Professor Messer is a free online training resource that provides videos, notes, and practice exams to help prepare for IT certifications like A+, Network+, Security+, Linux+, and more.

anetworksecuritylinuxit-certificationsexam-preptraining-videos

Full review → Alternatives