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January 22, 2026

Gmail + Brevo: score leads and draft replies

Gmail + Brevo: score leads and draft replies - n8n workflow automation template
Lisa Granqvist Partner Workflow Automation Expert
Gmail + Brevo: score leads and draft replies - n8n workflow automation template
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Your inbox is lying to you. Not on purpose, but because the signals are scattered: replies live in Gmail, opens and clicks live in Brevo, and your “lead status” is usually a half-updated note somewhere else.

This Gmail Brevo automation hits founders first (because there’s never enough time), but marketing managers and agency operators feel it too. You end up missing intent, replying too late, and letting good leads cool off while you’re busy doing admin.

This workflow connects Gmail + Brevo engagement to a living lead score, then drafts the next reply in your voice. You’ll see how it works, what you need, and where teams usually trip up.

How This Automation Works

The full n8n workflow, from trigger to final output:

n8n Workflow Template: Gmail + Brevo: score leads and draft replies

The Problem: lead follow-ups fall apart across tools

Lead follow-up sounds simple until you’re doing it at speed. Someone replies in Gmail with “Sounds interesting, send pricing,” but you don’t see it for hours. Another person clicks your Brevo email three times, yet your CRM still shows them as “cold.” Then there are the messy ones: auto-replies, out-of-office messages, and unsubscribe requests that end up being treated like real interest. It’s not just time wasted. It’s momentum lost, and frankly, it’s hard to stay consistent when every signal lives in a different place.

The friction compounds.

  • Manual triage turns into constant tab switching between Gmail threads, Brevo stats, and a CRM record that may or may not be updated.
  • Replies get handled inconsistently, so prospects hear a different “voice” depending on who answered last.
  • Unsubscribes and automated replies pollute your pipeline, which means your “hot lead” list stops being trustworthy.
  • Without ongoing score decay and re-engagement rules, older leads sit there forever and new leads don’t get prioritized.

The Solution: AI triage + scoring + drafted replies in one loop

This workflow acts like an always-on sales assistant that watches two streams of truth: what people do (Brevo engagement events) and what people say (Gmail replies). When an email reply arrives, the workflow looks up the lead by email, pulls context from your lead database, and sends the message to an AI model to classify intent. It can spot unsubscribe requests, out-of-office messages, and real human responses, then decide what should happen next. If a reply deserves a response, it drafts a contextual email that matches tone, addresses objections, and signs off in a natural way. At the same time, engagement events from Brevo update metrics and lead scores so your “warm” and “hot” statuses are based on behavior, not gut feel.

The workflow starts with triggers from Gmail and Brevo, plus scheduled check-ins that keep your lead list clean. In the middle, scoring logic updates your CRM, drafts replies, and creates “human review” tasks when something looks sensitive. The output is simple: updated lead records, drafted emails ready to send (or auto-sent if you choose), and a daily performance report.

What You Get: Automation vs. Results

Example: What This Looks Like

Say you run 3 outbound campaigns and get roughly 25 replies and 200 engagement events (opens/clicks/bounces) in a week. Manually, even “quick checks” add up: about 5 minutes to read and label each reply (around 2 hours), plus another minute per event to find the right record and update it (about 3 hours). With this workflow, replies and events get classified and written back automatically, and you only review edge cases. That usually means 20 minutes a day, not a couple hours.

What You’ll Need

  • n8n instance (try n8n Cloud free)
  • Self-hosting option if you prefer (Hostinger works well)
  • Gmail for receiving replies and sending drafts.
  • Brevo (Sendinblue) to capture opens, clicks, bounces, unsubscribes.
  • NocoDB to store leads, scores, correspondence, templates.
  • OpenAI API key (get it from your OpenAI dashboard).

Skill level: Intermediate. You’ll mostly connect accounts and map fields, but you should be comfortable checking a database table structure and testing webhooks.

Don’t want to set this up yourself? Talk to an automation expert (free 15-minute consultation).

How It Works

Gmail and Brevo kick things off. A Gmail trigger listens for incoming replies, while a Brevo event trigger captures engagement events like clicks, bounces, spam flags, and unsubscribes as they happen.

Lead records get matched and enriched. The workflow locates the right lead by email in NocoDB, pulls prior correspondence and the current template, then merges that context so the next actions are based on the full thread.

AI decides what the reply “means,” then acts. The intent classification routes messages into buckets (unsubscribe, out-of-office, needs review, normal reply). For normal replies, an AI agent drafts a response that fits the tone and addresses objections, then a brief delay makes sending behavior feel less robotic.

Scores and statuses stay accurate over time. Separate scheduled runs retrieve active leads, apply score decay, update statuses (cold/warm/hot), and queue re-engagement tasks so your pipeline doesn’t quietly rot.

You can easily modify reply rules to require approval before sending, or change the scoring thresholds that define “warm” versus “hot” based on your sales cycle. See the full implementation guide below for customization options.

Step-by-Step Implementation Guide

Step 1: Configure the Schedule and Email Triggers

Set up the triggers that launch daily, hourly, inbound email, and Brevo event flows.

  1. Open Daily Schedule Trigger and configure the schedule parameters to run your daily lead processing.
  2. Open Hourly Schedule Trigger and set the hourly cadence for top-lead prioritization.
  3. Open Gmail Incoming Trigger to capture inbound replies from your Gmail account. Credential Required: Connect your Gmail credentials.
  4. Open Brevo Event Trigger to listen for engagement events. Credential Required: Connect your Brevo (Sendinblue) credentials.

Step 2: Connect the Lead Database (NocoDB)

This workflow relies on NocoDB for lead records, scoring, and analytics storage. Connect credentials across all NocoDB actions.

  1. Open Retrieve Active Leads and connect your NocoDB credentials. Credential Required: Connect your NocoDB credentials.
  2. Repeat the credential connection for other database nodes such as Retrieve Top Leads, Lookup Lead via Email, Record Interaction, Modify Lead Score, and Store Analytics Data.
  3. Verify that database tables and fields exist for outreach logs, engagement events, lead status, and analytics before running the workflow.

⚠️ Common Pitfall: This workflow uses 20+ NocoDB nodes across multiple paths. If any one node is missing credentials or points to the wrong base, executions will fail downstream.

Step 3: Configure Batch Processing and Lead Scoring

These nodes handle lead iteration, score decay, and re-engagement queuing from the daily schedule.

  1. Open Batch Processing Loop and confirm the batch size for processing lead records.
  2. Open Compute Score Decay and ensure the code logic matches your scoring model.
  3. Open Write Lead Scores to update the lead records after decay calculations.
  4. Open Re-engagement Needed? and verify the conditions for when leads should be sent to Queue Re-engagement.

Step 4: Prepare Outreach Context and Templates

This step builds the data context used to craft personalized outreach.

  1. Confirm Retrieve Top Leads feeds into Iterate Leads to process priority prospects.
  2. Check Fetch Product Details, Fetch Prior Correspondence, and Fetch Current Template to ensure each returns the expected data.
  3. Validate data shaping in Aggregate Product List, All Correspondence, and Current Template Summary before they flow into Merge Data Streams and Aggregate Records.
  4. Open Assign Outreach Fields and confirm the final field mapping used by Craft Personalized Email.

Step 5: Set Up AI Content and Reply Generation

Configure the OpenAI nodes that classify intent and generate personalized email content.

  1. Open Craft Personalized Email and connect your OpenAI credentials. Credential Required: Connect your OpenAI credentials.
  2. Open Intent Classification AI and connect your OpenAI credentials. Credential Required: Connect your OpenAI credentials.
  3. Open Compose AI Reply and connect your OpenAI credentials. Credential Required: Connect your OpenAI credentials.
  4. Verify that Aggregate For Reply feeds into Compose AI Reply before the Human-like Delay and Send AI Reply sequence.

If AI output appears generic, add more fields in Assign Outreach Fields to enrich the prompt context.

Step 6: Configure Reply Parsing and Routing

Inbound replies are parsed, classified, and routed to specific lead actions.

  1. Open Parse Reply Data and review the code logic for extracting sender details and content.
  2. Verify that Lookup Lead via Email connects to Intent Classification AI, then to Route by Reply Type.
  3. Confirm that Route by Reply Type sends results to Mark Pending Review, Mark Unsubscribed Lead, Mark Out-of-Office, and the reply context path (Fetch Previous Exchange and Retrieve All Products).
  4. Ensure Mark Pending Review routes into Create Review Task and then Alert Sales Team.

Step 7: Track Engagement Events and Metrics

Engagement events are ingested from Brevo and used to update lead engagement metrics.

  1. Review Parse Event Payload to ensure the code extracts the correct identifiers.
  2. Confirm that Locate Lead Record feeds into Lead Located? before logging in Record Engagement Event.
  3. Verify that Compute Score Update and Update Engagement Metrics correctly update engagement data.
  4. Check the conditional cleanup in Special Action Required? and its action in Remove Table Row.

Step 8: Configure Outreach Delivery and Logging

This sequence sends messages and logs results to keep lead status current.

  1. Open Dispatch Initial Outreach and configure the HTTP request settings for your email delivery endpoint.
  2. Open Send AI Reply and connect Gmail credentials for outbound reply delivery. Credential Required: Connect your Gmail credentials.
  3. Confirm the logging chain Dispatch Initial Outreach → Log Outreach Activity → Modify Lead Status.
  4. Verify the analytics chain Collect Results → Create Analytics Report → Send Status Message → Store Analytics Data. Credential Required: Connect your Gmail credentials on Send Status Message.

Step 9: Test and Activate Your Workflow

Run controlled tests to ensure each path works before going live.

  1. Manually execute Daily Schedule Trigger and confirm leads flow through Batch Processing Loop to Create Analytics Report.
  2. Trigger a test email to Gmail Incoming Trigger and verify it routes through Parse Reply Data, Intent Classification AI, and Route by Reply Type.
  3. Send a test event to Brevo Event Trigger and verify that Record Engagement Event and Update Engagement Metrics update the database.
  4. When results look correct, toggle the workflow to Active for production use.
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Common Gotchas

  • Gmail permissions can be picky. If sending fails, check your connected Gmail credential in n8n first, then confirm the mailbox still allows API access.
  • If you’re using Wait nodes or external processing, timing varies. Bump up the wait duration if downstream nodes fail on empty responses.
  • Brevo webhooks only help if events map cleanly to a lead. If “Locate Lead Record” can’t match an email, inspect the webhook payload fields and your NocoDB email column formatting.

Related Workflows

If your team also needs faster lead qualification from form fills, JotForm + HubSpot: score leads and route fast pairs well, because you can score and route at capture time, then let Gmail + Brevo handle the conversation and engagement loop.

For teams doing outbound prospecting and list building, Google Sheets + LinkedIn, smarter prospect lists is a clean “top of funnel” add-on. Build the list in Sheets, then feed the best prospects into this scoring and reply workflow.

When LinkedIn outreach is part of your nurture motion, LinkedIn + Google Sheets: leads scored and messaged helps you keep messaging consistent before people ever hit your inbox, so the handoff into Gmail feels seamless.

Need smarter inbox behavior but you’re starting from form-based leads? Jotform to Gmail, smarter replies for better leads focuses on reply quality and speed, then you can layer in Brevo engagement scoring once email campaigns ramp up.

Finally, if you want a human to be notified instantly when something important lands, HighLevel + Slack: never miss a Gmail reply again is great for sales teams that still want a “tap on the shoulder” for urgent replies while automation handles the rest.


Quick reference:

Frequently Asked Questions

How long does it take to set up this Gmail Brevo automation?

About 60–90 minutes if your Gmail, Brevo, and NocoDB accounts are ready.

Do I need coding skills to automate Gmail lead scoring?

No. You’ll mainly connect accounts, map a few fields, and test with sample replies and events.

Is n8n free to use for this Gmail Brevo automation workflow?

Yes. n8n has a free self-hosted option and a free trial on n8n Cloud. Cloud plans start at $20/month for higher volume. You’ll also need to factor in OpenAI API costs (usually a few cents per day at small volumes).

Where can I host n8n to run this Gmail Brevo automation?

Two options: n8n Cloud (managed, easiest setup) or self-hosting on a VPS. For self-hosting, Hostinger VPS is affordable and handles n8n well. Self-hosting gives you unlimited executions but requires basic server management.

Can I customize this Gmail Brevo automation workflow for approval-only sending?

Yes, but you’ll want to change the behavior around “Compose AI Reply” and “Send AI Reply.” Many teams keep drafting automatic, then route anything “high risk” through “Mark Pending Review” so a human approves before it sends. You can also tighten the “Route by Reply Type” logic so anything negative, legal-sounding, or unclear always becomes a review task.

Why is my Gmail connection failing in this workflow?

Most of the time it’s an expired or revoked credential in n8n, so reconnect Gmail and retry “Send AI Reply.” If it fails only sometimes, check for sending limits on the mailbox and make sure you’re not firing bursts from the hourly outreach run. Also confirm the workflow is listening to the same inbox you’re replying from, because mismatched accounts causes confusing “missing thread” issues.

How many leads can this Gmail Brevo automation handle?

If you self-host, there’s no fixed execution limit (it depends on your server). On n8n Cloud, capacity depends on your plan, but most small teams can comfortably handle hundreds of leads and several thousand events a month with a basic setup, since engagement events are lightweight and replies are the heavier part.

Is this Gmail Brevo automation better than using Zapier or Make?

Often, yes. This workflow relies on branching, classification, score decay, and “review task” routing, and those flows get expensive or awkward in simpler automation tools. n8n also gives you the option to self-host, which matters once Brevo starts firing lots of events. Zapier or Make can still be fine for a basic “Brevo event → update a row” setup, just not for the full AI triage loop. If you’re unsure, Talk to an automation expert and you’ll get a straight answer.

Set this up once and your lead scores, statuses, and next replies stop drifting out of sync. The workflow handles the repetitive parts so you can focus on the conversations that actually close deals.

Need Help Setting This Up?

Our automation experts can build and customize this workflow for your specific needs. Free 15-minute consultation—no commitment required.

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Lisa Granqvist

Workflow Automation Expert

Expert in workflow automation and no-code tools.

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