Unbabel is a new kind of online translation service that “provides human quality translation at one-fifth the going rate.”
Unbabel also has released a REST-based API [application programming interface] with which companies can integrate translation directly into their workflow. The service says it currently has nearly 3,000 translators and are translating over 25,000 words per day for over 30 paying customers. Go to http://www.unbabel.com for more info.
