n8n Workflow: Track Competitor Pages, Digest & Gmail Alerts

Track competitor page changes automatically—get an AI-ranked Gmail digest only when it matters

This n8n workflow runs daily to monitor competitor URLs from your Google Sheets, detects meaningful content changes using a text fingerprint, and then emails a ranked HTML digest via Gmail—summarized and scored by Google Gemini—only when changes meet your significance threshold.

What this workflow does

• Scheduled monitoring: Executes once per day, loading your digest recipient, significance threshold, and diff size limits.

• Read your tracked URLs: Pulls the list of URLs and stored snapshots from a Google Sheets tab named “Pages” (columns include url, name, last_hash, last_snapshot, last_checked).

• Detect real content changes: Fetches each page’s HTML, converts it to normalized readable text, then generates a hash that tolerates noisy markup differences.

• Skip unchanged pages: If the hash is unchanged, the workflow avoids unnecessary AI processing.

• Create a capped diff: For changed pages, it computes an added/removed line diff (capped by your configured maximum) before analysis.

• AI scoring + summarization: Sends the diff to Google Gemini to assign a significance score (0–5) plus category, headline, summary, and “why it matters,” then writes the verdict back to Google Sheets.

• Update snapshots: Stores the latest hash, snapshot text, and last-checked timestamp in Google Sheets.

• Email only notable updates: Aggregates results, builds a sorted HTML email digest, and sends via Gmail only if changes meet or exceed the threshold.

Use cases

• SaaS operators watching competitor pricing, packaging, and feature pages for meaningful updates.

• Competitive intelligence teams wanting daily, ranked change summaries instead of manual browsing.

• Automation engineers building a reliable “diff + AI digest” pipeline for web page monitoring.

Technical details

• Workflow logic: Uses nodes such as if, set, code, and no op to control skipping, diff handling, and aggregation.

• Digest delivery: Sends results via Gmail (or sends nothing when no significant changes are found).

• Change analysis: Uses a text fingerprint (hash) to detect changes with noise tolerance, then leverages Google Gemini to score and summarize diffs.

• Data storage: Reads and updates Google Sheets (OAuth credentials required).