What are some alternatives?
When comparing Collabio and Google Drive - Docs, you can also consider the following products
Microsoft Office - From desktop to web for Macs and PCs, Office delivers the tools to get work done. View product information or sign in to Office 365.
Adobe Acrobat DC - Make your job easier with Adobe Acrobat DC, the trusted PDF creator. Use Acrobat to convert, edit and sign PDF files at your desk or on the go.
WPS Office - Would you need Office Word, Excel or PowerPoint for Home, business or School? WPS.com would give you right version for you.
PDFelement - All-in-one PDF editor
PDF Expert - Download a free trial of PDF Expert - the best PDF software for your Mac. Enjoy advanced reading layouts, powerful PDF editing and classical annotation tools.
Pages - Pages for Mac is a word processor that offers tools needed to create documents.