What are some alternatives?
Pairaphrase - Web-based translation management system
Transifex - Transifex makes it easy to collect, translate and deliver digital content, web and mobile apps in multiple languages. Localization for agile teams.
Smartling - Website localization & translation
POEditor - The translation and localization management platform that's easy to use *and* affordable!
OneSky - Full Stack Localization Solution
Pootle - Multiple file formats.