Which broker offers zero brokerage trading?

Zerodha online discount brokerage firm offers the cheapest trading plan by offering zero brokerage delivery trading and trading in other segments at a flat Rs. 20 per order brokerage. Angel One is another top brokerage firm that offers exactly same brokerage plan. Prostocks is another top discount broker that offers nil brokerage delivery trading, and charges Rs. 15 flat brokerage on equity intraday, derivatives, commodity, and currency trading.