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The company launched Facebook for Work in beta testing last January, and it now has over 450 companies trying it out - including big corporations like Heineken and the Royal Bank of Scotland - but India has emerged as its top country.
The platform aims to streamline business communication by giving users a separate Facebook account where they talk and collaborate with coworkers.
"Rolling out Facebook at Work to companies in India is a significant milestone," Julien Codorniou, the exec leading the project, said in a statement. "As the workplace transforms, businesses want new ways for co-workers to collaborate effectively and be more productive. We are excited at the high rate of adoption globally and I look forward to working with all businesses in India."