Summarize daily Gmail emails with Gemini and send to Slack, WhatsApp and Docs

Description

AI Daily Email Summary - Auto-Delivered to Slack, WhatsApp & Docs (Gmail + Gemini)

Summary
Stop starting your day by drowning in unread emails. This workflow runs every morning and turns your Gmail inbox into a clean, prioritized briefing — automatically organized into what needs your attention, what meetings are coming up, and what you can read later. The summary lands wherever you already live: Google Docs, Gmail, Slack, or WhatsApp.

Powered by Google Gemini 2.5 Flash, with a built-in privacy layer that scrubs passwords, OTPs, and API keys before they ever leave your n8n instance.

Key features
Prioritized daily briefing:** Gemini reads your last 24 hours of email and groups it into Action Required, Meetings & Events, and Important Updates — so you know exactly where to focus.
Deliver anywhere:** Route your summary to Google Docs (as a daily log), Gmail (as a formatted report), Slack (as a DM), or WhatsApp — toggle each channel on or off from a single config node.
Safe to use with AI:** A regex-based privacy layer scrubs sensitive patterns (OTPs, passwords, API keys, card numbers) inside n8n before anything reaches the AI model.
Zero wasted API calls:** If your inbox is empty, the workflow skips the AI step entirely and sends a clean "no emails" status instead.
Built-in error alerts:** If any step fails — expired credentials, API error — you get a diagnostic email automatically so nothing breaks silently.

How it works
Trigger: Runs on a daily schedule (fully configurable).
Fetch & clean: Pulls primary emails from the last 24 hours and scrubs sensitive patterns before processing.
Summarize: Gemini 2.5 Flash generates a formatted text summary, categorized by priority.
Deliver: Your summary is routed to whichever channels you've toggled on in the config node.
Monitor: A global error handler catches failures and emails you a crash report.

Nodes used
Gmail (Fetch, Send, Error Alert)
Google Gemini (LangChain Native Node)
Slack (Post Alert)
WhatsApp Business Cloud API
Google Docs (Create & Append)
Schedule Trigger
Error Trigger
Code (PII Scrubbing & Formatting)

Setup instructions
Credentials: Connect Gmail, Google Docs, Slack, WhatsApp, and your Google Gemini API key. (Note: You only need one Gmail OAuth2 credential. n8n will use this single connection for both fetching your inbox and sending the final summary email).
Config node & Fallback: Open ⚙️ Set Configuration and fill in your target email, Slack user ID, and WhatsApp number. (Optional: Open the "Gmail: Send Error Alert" node at the bottom and replace PASTE_FALLBACK_EMAIL_HERE with a backup admin email, ensuring you get crash reports even if the config node fails).
Toggle channels: Set each receiveOverviewIn... field to true for the platforms you want to activate.
Test: Click Test Workflow — a sample email with a dummy password is pinned to the trigger so you can see the PII scrubber and summary in action immediately.
Activate: Switch the workflow to Active and your first briefing runs on schedule.

Requirements
n8n version 1.0+
Google Gemini API key
> Note on Model Selection: This template uses gemini-2.5-flash, which is currently in preview. If it is unavailable in your region or you encounter rate limits, simply open the Generate AI Summary node and switch the model to gemini-1.5-flash.
API scopes: Gmail (readonly, send), Google Docs (write), Slack (chat:write), WhatsApp Business

Customization ideas
Change email scope:** Edit the labels in the Gmail fetch node to include Promotions, Updates, or a specific sender.
Filter by project:** Enable filterBySubject or filterBySender in the config node to build a summary focused on one client or topic.
Adjust the tone:** Edit the prompt in the Build LLM Prompt node to make summaries more detailed, more concise, or in a different language.
Change the schedule:** Update the Schedule Trigger to run twice a day, weekly, or on any cadence you need.

Use cases
Start every morning with a 60-second read of everything that matters in your inbox.
Keep a searchable daily email log in Google Docs without lifting a finger.
Stay on top of client communications even when you're away from your inbox.
Safely use AI for email management without exposing passwords or OTPs to external model providers.