How to Build an AI Customer Support Chatbot That Also Upsells Products

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Developers can build a fully functional AI customer support chatbot in roughly 4 to 6 hours using OpenAI's GPT-4o, the n8n workflow engine, and a Pinecone vector database. The bot handles common support queries and can suggest relevant products or upgrades to customers without any human agent involvement. It uses retrieval-augmented generation (RAG) to pull product data from a vector store, enabling contextually accurate responses. Customer interactions can be delivered via Twilio SMS, WhatsApp, or a Bubble-powered web widget. The estimated cost is largely pay-as-you-go, with free tiers available for most tools including Pinecone and n8n self-hosted.

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