Handshake AI: Turn Conference Contacts into Gmail Follow-ups

Turn every conference handshake into an automatic Gmail follow-up

Handshake AI watches for Telegram handshake cards, photos, and voice notes—and then automatically extracts the contact, researches them, logs them in Google Sheets, drafts a personalized Gmail email, and sends you an interactive Telegram review card (with reminders and action buttons).

What this workflow does

• Triggers automatically from a Telegram message/callback, a daily 9:00 schedule, a Sunday 18:00 schedule, or a self-call when one photo contains multiple handshake cards.
• Accepts only allowed chat IDs: until allowedChatId is set, it only replies with your guide and your chat ID.
• Understands the input: for photos it downloads the image from Telegram and uses OpenAI to extract one or more contact records; for voice notes it downloads and transcribes via Groq, then uses OpenAI to extract the contact; for text it uses OpenAI to structure the contact details.
• Prevents duplicates & enriches leads by checking Google Sheets for an existing match, then running OpenAI web search to research the person and generate a lead score plus a personalized follow-up message.
• Creates Gmail drafts (or replaces them when an email address is available), updates the contact row in the Google Sheets “Contacts” tab, and posts a Telegram summary card with actions like showing/sending/rewriting the draft, snoozing, marking status, WhatsApp/LinkedIn links, and saving a vCard.

Use cases

• Capture handshake cards at conferences and turn them into Gmail follow-ups without manual copying.
• Batch-process multiple cards from a single photo and review everything in Telegram.
• Speed up SaaS lead follow-up after events with a researched, scored outreach message.

Technical details (n8n)

• Automation nodes: if, set, code, gmail, switch, telegram.
• Uses OpenAI for extraction, contact structuring, lead research, scoring, and message generation.
• Uses Groq for voice transcription before OpenAI extraction.
• Integrates Google Sheets (duplicate checking + “Contacts” tab updates).