Chatclient is a custom AI agent builder that trains ChatGPT on your data and lets you embed a chat widget on your website. It helps businesses reduce customer support by 90% by handling customer support, lead generation, user engagement, and more. The platform supports 95+ languages and offers features like multiple data sources (website URLs, PDFs, doc files, plain text), customization of the agent's look and feel, whitelabeling to remove branding, auto-retraining to keep the agent synced with data, and integrations with tools like Slack, WhatsApp, and Zapier. Users can choose from powerful AI models including GPT-4o, Claude 3.5 Sonnet, and Gemini 1.5 Pro. Use cases include lead generation, human handoff for escalated issues, creating AI personas for user engagement, and deploying agents across multiple platforms via embed code or API. The setup process involves importing data, customizing behavior and appearance, and embedding the agent on the website.