{"slug": "i-built-an-ai-that-answers-calls-and-whatsapp-messages-for-your-business", "title": "I built an AI that answers calls and WhatsApp messages for your business", "summary": "An entrepreneur has developed Estera, an AI agent designed to answer calls and WhatsApp messages for businesses such as restaurants, real estate agencies, and medical clinics. The tool ensures no customer goes unanswered by handling calls after hours, replying to WhatsApp messages within seconds, and booking appointments directly into calendars. Early case studies with businesses in Europe and the US show appointments being booked automatically.", "body_md": "Hey everyone,\n\nI've spent the last few months building something I personally felt the need for as an entrepreneur: an AI agent that makes sure no customer ever goes unanswered.\n\nIt's called Estera ([tryestera.com](https://tryestera.com)), and I built it for restaurants, real estate agencies, medical, law firms and hotels. Basically, businesses where every missed call means lost revenue.\n\nWhat it actually does:\n\nAnswers calls automatically when your team can't: nights, weekends, peak hours, after hours\n\nReplies on WhatsApp in under 5 seconds, 24/7\n\nBooks appointments directly into your calendar, no back-and-forth needed\n\nSpeaks naturally, with a human-sounding voice, adapted to your brand\n\nWe launched recently and already have case studies with medical clinics, real estate agencies and restaurants from all over Europe and US where they find appointments already booked in their calendar.\n\nIf you run a business in any of these industries and want to try it out, I'm happy to answer questions. Any feedback is welcome, we're early stage and building based on real needs.\n\nThanks!", "url": "https://wpnews.pro/news/i-built-an-ai-that-answers-calls-and-whatsapp-messages-for-your-business", "canonical_source": "https://dev.to/fredy/i-built-an-ai-that-answers-calls-and-whatsapp-messages-for-your-business-156l", "published_at": "2026-08-12 12:30:15+00:00", "updated_at": "2026-08-12 12:47:50.257037+00:00", "lang": "en", "topics": ["artificial-intelligence", "ai-products", "ai-agents"], "entities": ["Estera"], "alternates": {"html": "https://wpnews.pro/news/i-built-an-ai-that-answers-calls-and-whatsapp-messages-for-your-business", "markdown": "https://wpnews.pro/news/i-built-an-ai-that-answers-calls-and-whatsapp-messages-for-your-business.md", "text": "https://wpnews.pro/news/i-built-an-ai-that-answers-calls-and-whatsapp-messages-for-your-business.txt", "jsonld": "https://wpnews.pro/news/i-built-an-ai-that-answers-calls-and-whatsapp-messages-for-your-business.jsonld"}}