Top 20 Call center company in India:

1. Infosys Technology
www.infosys.com

2. Tata Consultancy Services
www.tcs.com

3. Wipro Technologies
www.wipro.com

4. Genpact
www.genpact.com

5. Tech Mahindra
www.techmahindra.com

6. HCL Technologies
www.hcltech.com

7. Mastek
www.mastek.com

8. WNS Global Services
www.wnsgs.com

9. Hexaware Technologies
www.hexaware.com

10. EXL Service
www.exlservice.com

11. 24/7 Customer
www.247customer.com

12. Cambridge
www.cambridgeworldwide.com

13. ITC Infotech
www.itcinfotech.com

14. KPIT Cummins infosystems
www.kpitcummins.com

15. Patni
www.patni.com

16. Zensar Technologies
www.zensar.com

17. MindTree
www.mindtree.com

18. Mphasis
www.mphasis.com

19. Aditya Birla Minacs
www.minacs.adityabirla.com

20. FirstSource Solutions
www.firstsource.com

21. Cross-Tab
www.cross-tab.com

Accenture www.accenture.com and IBM www.ibm.com/in head the list published as an advertising feature by IAOP in the current Fortune 500 issue of Fortune magazine.