> ## Documentation Index > Fetch the complete documentation index at: https://docs.getsmartalex.com/llms.txt > Use this file to discover all available pages before exploring further. # What is conversational AI? > Conversational AI is technology that understands and generates natural language across voice and text. Learn how it works, the listen, understand, decide, act, speak pipeline, and how businesses use conversational AI to answer calls, qualify leads, and book appointments. **Conversational AI is technology that understands and generates natural human language**, across both voice and text, so people can speak or type to a computer the way they would to a real person. Instead of pressing buttons or matching exact keywords, the caller just says what they want, and the system works out the meaning and responds. Older automation was rigid: press 1 for sales, press 2 for support, or a chatbot that only replied when you typed the exact right phrase. Conversational AI removes that friction. It listens to open-ended, messy, human speech, understands intent in context, and holds a back-and-forth conversation that moves toward an outcome. For a business, that outcome is usually practical: a booked appointment, a qualified lead, a payment taken, a question answered, a call routed to the right person. Conversational AI is what makes those things happen automatically, around the clock, on the phone and in chat. *** ## How conversational AI works Under the hood, every conversation runs through the same short loop. The system listens, works out what you mean, decides what to do, acts if needed, and speaks back. Then it repeats until the conversation is done. ```mermaid theme={null} flowchart LR A[Person speaks or types] --> B[Listen] B --> C[Understand] C --> D[Decide] D --> E[Act] E --> F[Speak or reply] F --> A ``` The system captures what the person says and converts speech to text in real time, or reads a typed message on a chat channel. It interprets intent and meaning: what the person actually wants, not just the literal words they used. It reasons over your knowledge base, business rules, and the conversation so far to choose the best next response or action. When the moment calls for it, it does something real: books an appointment, sends a payment link, transfers to a colleague, or updates your CRM. It generates a natural reply and speaks it back in a lifelike voice, or writes it in chat, and the loop continues. SmartAlex runs its own voice engine built on curated, high-accuracy speech, language, and voice models, kept abstracted behind the platform. You get the accuracy and natural voices without ever touching or managing the underlying models. *** ## Conversational AI vs older phone menus and chatbots The real leap is from matching to understanding. | | Phone menu or basic chatbot | Conversational AI | | ------------- | ------------------------------------- | --------------------------------------------------- | | Input | Press a key, or type an exact keyword | Natural speech and everyday language | | Understanding | Fixed menus and rigid rules | Intent, context, and memory of the conversation | | Response | Scripted and identical every time | Generated, natural, and on topic | | Actions | Little more than routing | Books, pays, transfers, follows up, updates systems | | Channels | One at a time | Voice, SMS, WhatsApp, email, and web chat | Conversational AI still follows your rules and stays on script where it matters. The difference is that it can understand a caller who phrases things in an unexpected way, instead of dead-ending them in a menu. *** ## Conversational AI for business Once a system can understand and act, it stops being a novelty and starts doing real work. Common uses across industries: * Answer every call, day or night, with no hold music and no missed voicemail. * Qualify and capture leads straight into your CRM while the caller is still on the line. * Book appointments, viewings, and callbacks against a live calendar. * Take payment by sending a secure card link mid-conversation through your connected payment provider. * Route or warm-transfer to the right person the moment a human is genuinely needed. * Follow up automatically by SMS, WhatsApp, or email after the conversation ends. * Answer repetitive questions accurately from your own knowledge base. Where it fits depends on your industry, but the pattern is the same everywhere: capture more of the conversations you are already paying to generate. Qualify buyers, book viewings, and never miss an enquiry. Handle bookings, reschedules, and after-hours calls. Intake new matters and screen callers before they reach a fee earner. Cover the phone so you can stay on the tools. *** ## SmartAlex is conversational AI for phone and chat SmartAlex is conversational AI applied to the two places customers actually reach you: the phone and live chat. You build an AI agent by describing what it should do in plain language to Alex, the in-app assistant, then put it live on a phone number or embed it on your site as a widget. From there the agent listens, understands, decides, acts through its connected tools, and speaks, exactly like the loop above. Because the agent can act, not just talk, it plugs into the systems you already use: calendars, CRM, email, messaging, payments, and your own APIs. It answers in a natural voice on calls and in text on chat, and everything it does is logged so you can review calls and outcomes. Want to build conversational AI into your own product? The live programmatic surfaces today are the [MCP server](/mcp/overview) and [Custom HTTP Tools](/guides/http-tools/overview). A REST API and TypeScript SDK are in private beta, so contact support for early access. You can start on the Free plan at \$0 with one agent and in-browser voice, no card required. When you add a phone number and live minutes, the Professional plan is \$99/month. See full [pricing](/pricing) for plans and add-ons. *** ## Frequently asked questions Software that understands natural human language and responds in kind, across voice and text, so people can talk or type to it the way they would to a person. A basic chatbot matches keywords and follows a fixed script. Conversational AI understands intent and context, holds a real back-and-forth, and can take actions like booking or paying. Chat is one channel it runs on, not the whole thing. Both. SmartAlex puts the same conversational AI on live phone calls and on web chat, so a caller and a website visitor get an equally natural experience. The voice is natural and responsive enough to feel like a real conversation. You choose how the agent introduces itself, and it can transfer to a human whenever a caller needs one. With the right tools switched on it can book appointments, send payment links, capture leads into your CRM, transfer calls, and follow up by message. See [agent tools](/essentials/agent-tools) for the full list. *** ## Related How AI voice assistants answer and act on live calls. The always-on front desk for your business phone line. What an agent is and how to configure one. Plans, minutes, and add-ons.