Quick price ranges (2026)
Starter rule-based chatbot on a single channel (website OR WhatsApp): ₹15,000-₹40,000 one-off. Mid-tier conversational AI with GPT-5 or Claude 4.7 across 2-3 channels: ₹75,000-₹1.5L. Full agentic chatbot with Razorpay/Zoho integration and multi-language voice: ₹2-3L. Recurring: ₹15K-30K/month for LLM tokens, hosting, and ongoing prompt tuning.
What drives the price
Three biggest cost variables: (1) Channels — WhatsApp Business API has per-template fees (₹0.8631/marketing message as of Jan 2026); website chat is free to operate. (2) LLM tokens — Claude Opus 4.7 produces 35% more tokens than GPT-5 on similar tasks; Sarvam's free credits cover early-stage SMBs. (3) Integrations — every CRM, payment gateway, calendar, or ERP connection adds development hours.
Hidden costs to watch
WhatsApp Business API verification + Meta-approved BSP markup (₹2K-5K/month base). LLM input/output token costs at scale (a busy clinic chatbot doing 5,000 conversations/month can hit ₹8K-15K in tokens alone). Annual prompt-engineering retainer if you want the bot to keep improving.
What we charge
ZentroTECH bundles starter chatbots into the lead-engine website package starting at ₹1.5L for a Koramangala / HSR Layout SMB. Full Indian-language voice + chat + CRM bundle runs ₹3-5L. Quote within 1 business day after free 30-min audit.