Hey guys ! Can anyone suggest a SMS and e-mail service API that's cost effective and suitable for India?

Not sure what is the cheapest right now, but I had good experience working with Mandrill for emails https://mandrillapp.com/api/docs/

For sending emails, both Mandrill and Sendgrid are easy to set up and not very expensive. The cheapest good option I think is Sendy. https://sendy.co/

I also find https://www.sendinblue.com while searching. Let me know your opinion on it.