I have used both. Zerodha is excellent in terms and user interface and customer care. HDFC portal still needs to be refreshed time and again to see the current rates. customer service of HDFC is at par with SBI
Ratings:
Brokerage - Average Account Maintenance Fees - Above Average Website Usability - Very Poor Research Capabilities - Very Poor Customer Service - Very Poor Overall Experience - Very Poor
Ratings:
Brokerage - Average
Account Maintenance Fees - Above Average
Website Usability - Very Poor
Research Capabilities - Very Poor
Customer Service - Very Poor
Overall Experience - Very Poor