There are some absolutely MASSIVE business process outsourcing companies in the Philippines! Want to know who are the biggest? Does size matter to you? Take a look at our list of the top ten outsourcing companies in the Philippines. Some of these companies have hundreds of thousands of employees worldwide offering a wide variety of services for large, Fortune 500 companies.

The source of this list is from Pasig City Rep. Roman Romulo as reported by Manila Standard Today. The top firms list is “based on their combined revenues of P250 billion ($5.9 billion) in 2013.” Below are the top 45 BPO and Call Center companies in the Philippines:

1. STAFFVIRTUAL - STAFFVIRTUAL provides outsourcing and human resources management solutions that connect companies with affordable staff in the Philippines at massive scale. STAFFVIRTUAL specializes in performing Customer Support, Back Office, IT, Content Marketing, Legal and Recruitment services for global brands, startups and SMBs.

2. Convergys Philippines Services Corp. (Php19.830 billion) - Convergys Corporation is a corporation based in Cincinnati, Ohio, that sells customer management and information management products, primarily to large corporations.

3. 24/7 Customer Philippines Inc. (Php13.061 billion) - The company's customer engagement platform assists several hundred million visitors across all channels, and engages in 1.5 billion conversations annually, most of which are automated.

4. JPMorgan Chase Bank N.A.-Philippine Global Service Center (Php11.789 billion) - JPMorgan Chase & Co. is a leading global financial services firm and one of the largest bankinginstitutions in the United States , with operations worldwide.

5. Telephilippines Inc. (Php8.722 billion) - DBA "Teleperformance Philippines", this company is a leading provider of outsourced customer experience management services in the country. The company began operations in the Philippines in 1996.

6. Sutherland Global Services Philippines Inc. (Php8.080 billion) - Global provider of world class innovative, analytics-driven business solutions and services.

7. Hewlett-Packard AP (Hong Kong) Ltd. (Php7.081 billion) - The Hewlett-Packard Company was an American multinational information technology company headquartered in Palo Alto, California.

8. Stream International Global Services Philippines Inc. (Php6.924 billion) - Stream Global Services (formerly known as Global BPO Services Corp.), was a BPO company acquired by Convergys thru a definitive merger, with more than 37,000 employees in 22 countries in 50 contact centers; it managed more than 100 million voice, e-mail, and chat contacts a year.

9. Teletech Offshore Investments B.V. (Php6.590 billion) - TeleTech Holdings, Inc. is a global business process outsourcing company headquartered in Englewood, Colorado.

10. IBM Daksh Business Process Services Philippines Inc. (Php6.307 billion) - International Business Machines Corporation is an American multinational technology and consulting corporation, with corporate headquarters in Armonk, New York.