Collabora Online offers Free Trial, but Documents To Go does not.
Documents To Go is designed for Individuals, Medium Business and Small Business.
Collabora Online is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Documents To Go Starts at $6.99/Month whereas for Collabora Online Starts at $2/user/month when yearly.
Some top alternatives to Documents To Go includes PSISafe, Microsoft Word, Google Docs, Qualified, Workvivo, Storydoc, iWork, SoftMaker Office, OfficeSuite, WPS Office, WordPerfect Office and Slick.
Some top alternatives to Collabora Online includes Nextcloud, ONLYOFFICE, ownCloud.online, ownCloud, LibreOffice, Qualified, OfficeSpace Software, Workvivo, OfficeFiles, Ability Office and OfficeSuite.