For billing alone, Tally is simpler and does the job well. But Odoo POS system becomes the better choice when you need more than just billing, it manages inventory in real time, tracks customer purchase history, handles multi-store operations, and integrates loyalty programs smoothly. Odoo point of sale software updates stock automatically with every sale and works offline when internet drops. Small businesses outgrow Tally once they need to manage stock across locations or want customer insights. Odoo gives you all that without maintaining separate systems for billing and inventory.