You cannot tell which company is best as it depends on each individual's perspective and the services, package that each company provides. However, there are some companies like Integra Web services, www.seo.in and so on who provide good services.

http://www.integrawebservices.com

www.seo.in

Check out the pricing, features and methodologies of each company and choose what would be best for you.

Here are number of good SEO service providers, you can check with any of them:

http://www.pagetraffic.in/

http://www.ishir.com/

https://www.profitbysearch.com/

http://www.isglobalweb.com/

Hope this will help you.

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