Brand Sentiment Monitoring n8n Workflow: Reddit, HN & Google News

Know what people are saying about your brand—every four hours—across Reddit, Hacker News, and Google News

This Brand Sentiment Monitoring n8n workflow automatically scans recent mentions of your brand and competitors, uses OpenAI to assess sentiment and crisis level, logs results to Google Sheets, and sends a Gmail alert only when issues are urgent.

What this workflow does

• Runs on a schedule every four hours and loads your configuration (brand/competitor names, Serper API key, alert recipient, and Google Sheets details).
• Searches the past week for mentions using:
  • Reddit via public JSON API
  • Hacker News via Algolia API
  • Google News via Serper News API
• Combines results into a single list of up to 20 formatted mentions, and stops quietly if no mentions are found.
• Calls OpenAI to return structured intelligence: overall sentiment, crisis level, scores, key concerns, and opportunities.
• Appends monitoring results (counts, sentiment, crisis level, scores, and top items) to the Google Sheets “Brand Intelligence” tab.
• Sends a Gmail alert only for crisis level: triggers alerts when Urgent or Critical; otherwise it ends after logging.

Use cases

• Catch early customer frustration or product issues discussed on Reddit/Hacker News.
• Track competitor chatter and sentiment trends for SaaS go-to-market decisions.
• Monitor brand reputation from Google News and prioritize response only when risk is high.

Technical details

• n8n nodes/tooling: if, set, code, http request, gmail, sticky note
• Integrations: OpenAI for sentiment/crisis analysis; Serper for Google News; Reddit JSON API; Hacker News Algolia API; Google Sheets logging; Gmail for urgent alerts

Setup requirements

• Add an OpenAI API credential and choose a chat model for analysis.
• Create a Serper account and paste the Serper API key.
• Connect Google Sheets OAuth2, use a tab named “Brand Intelligence”, and provide the spreadsheet ID.
• Connect Gmail OAuth for alert sending.