Creation of chatbots for Telegram, Viber, WhatsApp

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Creating chatbots for Telegram, Viber, WhatsApp — implementation options:
1) Simple FAQ bot (answers to questions, menu, buttons)
2) Sales bot with a catalog and order processing
3) Integrated bot (CRM, inventory, payments, SMS/Email notifications)
4) Multichannel bot (simultaneous operation in Telegram + Viber + WhatsApp) with analytics and mailings

Stage 1: Analysis and task setting
• Requirement gathering: bot goals, target audience, interaction scenarios (dialogs).
• Defining necessary integrations (CRM, product database, payments, SMS service, etc.).

Stage 2: Designing dialogs and UX
• Creating a dialog map (flow) for key scenarios — ordering, support, FAQ.
• Selecting messages, buttons, user data validations.

Stage 3: Development and platform setup
• Connecting Telegram Bot API, Viber REST API, WhatsApp Business API (or provider).
• Setting up webhooks, session storage, error handling.

Stage 4: Testing and launch
• Testing on real scenarios, fixing bugs, optimizing UX.

What is needed from you:
• Clear technical specifications or description of main scenarios/frequent questions.
• Product/service data in any electronic format (Excel/CSV/Google Sheets).
• Access: Telegram bot token, access to Viber account (or creation), access to WhatsApp Business API/provider or phone number for connection.
• Access to CRM/website or API (if integrations are needed).
• Branding materials (logos, texts, images) and contact information for messages.