n8n Workflow: Detect Competitor Changes with Google Sheets, Gemini & Telegram

Detect meaningful competitor page changes—then brief you with Telegram alerts using Google Sheets, Gemini & Telegram

This n8n workflow monitors your competitor watchlist in Google Sheets, detects significant content changes on their pages, and uses Gemini to classify what changed and how it may impact your business—before sending high-impact alerts to Telegram.

What this workflow does

• Runs every weekday morning and loads the active competitor watchlist plus historical page snapshots from Google Sheets.
• Fetches and fingerprints page content for each active competitor, normalizes it, and compares it to the latest stored snapshot.
• Calculates a content-change ratio and only continues when the change exceeds your configured threshold. The latest snapshot is saved for future comparisons.
• Pulls recent Google News results to add timing/context for the change (news is context only, not proof of the website change).
• Analyzes before-and-after evidence with Gemini to classify the change, estimate impact and confidence, and return evidence excerpts, implications, recommended action, and what to monitor next.
• Validates the AI output by parsing the returned JSON, checking score ranges and change type, and verifying that the evidence excerpts actually exist in the captured before-and-after page text.
• Records verified moves and sends an email strategy brief, plus high-impact Telegram alerts when results warrant attention.

Use cases

• SaaS operators tracking competitor pricing, feature pages, or release notes for meaningful updates
• Automation engineers building a reliable “change detection + AI triage” pipeline in n8n
• Teams that want evidence-backed insights (Gemini claims verified against captured page text)

Technical details (n8n)

• Workflow logic includes if and code nodes for thresholding, validation, and scoring
• HTTP request to fetch competitor pages
• Telegram for alerts and messaging
• Email send to deliver the strategy brief
• Uses a sticky note for workflow documentation