Apollo.io to Brevo CRM via n8n: Full Outbound Pipeline Tutorial (2026)

This technical breakdown contains affiliate links. If you deploy this stack using my links, I earn a commission at no extra cost to you.

Every B2B sales team has the same problem: Apollo.io is full of qualified leads, and Brevo is your outreach engine — but getting contacts from one into the other is a manual, error-prone nightmare. You export a CSV, import it, deduplicate by hand, pray nothing is duplicated, and then manually trigger sequences. By the time your SDR has finished that process, the lead has already booked a call with a competitor.

The answer is a fully automated, real-time Apollo → n8n → Brevo pipeline that runs on autopilot 24/7. This tutorial walks through the exact production architecture — including deduplication logic, sequence triggering, and SMTP delivery automation — that eliminates manual data movement from your outbound stack entirely.

Why Native Apollo–Brevo Sync Falls Short

Both Apollo.io and Brevo offer native integrations, but they are built for simplicity — not production scale. Here is what breaks in practice:

• No deduplication logic: Native sync blindly pushes every Apollo contact to Brevo. If a prospect already exists (perhaps from a different list), you create a duplicate record and that contact receives the same email twice — an immediate trust-killer.
• No conditional routing: You cannot say "if the contact's company has 50+ employees AND is in SaaS, add them to Sequence A; otherwise, Sequence B." Native integrations have no branching logic.
• Bulk-only sync, not real-time: Most native connectors run on fixed schedules (hourly or daily). A lead who fills out a form at 9am may not be in Brevo until the next afternoon's sync batch.
• Silent failures: When an API rate limit is hit or a field mismatch occurs, native syncs fail silently. You discover the problem days later when pipeline numbers don't add up.

An n8n orchestration layer between Apollo and Brevo solves all four of these problems at once.

Click to expand

Pipeline Architecture Overview

The full pipeline has four stages:

graph TD
    A[Apollo.io — Saved Search / List] -->|Webhook or Scheduled Pull| B[n8n — Ingestion Trigger]
    B --> C{Deduplication Check via Brevo API}
    C -->|Contact Exists| D[n8n — Update Contact Fields Only]
    C -->|New Contact| E[n8n — Create Contact in Brevo]
    E --> F[n8n — Enroll in Email Sequence]
    D --> G[n8n — Skip Enrollment / Log]
    F --> H[Brevo — Automated Sequence Delivery]

Stage 1 — Ingestion: n8n pulls leads from Apollo either via a scheduled cron trigger (polling a saved search) or in real-time via a webhook when a new contact matches your Apollo sequence filters.

Stage 2 — Deduplication: Before creating anything in Brevo, n8n fires a GET /contacts/{email} request to the Brevo API. If a 200 is returned, the contact already exists and we route to an update flow. If a 404 is returned, the contact is genuinely new.

Stage 3 — Create or Update: New contacts are created with all enriched fields from Apollo (company, title, industry, headcount, LinkedIn URL). Existing contacts receive a field-merge update — no data is overwritten unless it is empty.

Stage 4 — Sequence Enrollment: New contacts matching your ICP criteria are immediately enrolled in a targeted Brevo email sequence. No manual clicking required.

Step 1: Setting Up the Apollo.io Data Source

You have two options to pull leads from Apollo into n8n:

Option A: Scheduled Apollo API Poll (Recommended for Lists)

Use Apollo's People Search API with a saved filter ID. Create a scheduled n8n Cron Node to run every 4 hours:

// n8n HTTP Request Node — Apollo People Search
Method: POST
URL: https://api.apollo.io/v1/mixed_people/search
Headers:
  Content-Type: application/json
  X-Api-Key: {{ $env.APOLLO_API_KEY }}

Body:
{
  "q_organization_domains": [],
  "page": 1,
  "per_page": 100,
  "person_titles": ["Founder", "CEO", "Head of Operations", "VP Sales"],
  "organization_num_employees_ranges": ["50,200", "201,500"],
  "person_locations": ["United States", "United Kingdom", "Canada", "Australia"]
}

The response returns a people array. Pass this into a Split In Batches node (batch size: 1) so each contact is processed individually through your deduplication logic.

Option B: Apollo Webhook (Real-Time for Sequences)

In Apollo, go to Settings → Integrations → Webhooks and register your n8n Webhook URL as the endpoint for contact.created and contact_stage.changed events. This gives you real-time pushes whenever Apollo adds or stages a contact.

Step 2: The Deduplication Logic Node

This is the most critical node in the pipeline. Before touching Brevo, you must check if the contact already exists:

// n8n HTTP Request Node — Brevo Contact Lookup
Method: GET
URL: https://api.brevo.com/v3/contacts/{{ encodeURIComponent($json.email) }}
Headers:
  api-key: {{ $env.BREVO_API_KEY }}
  Accept: application/json

Follow this with an n8n IF Node that evaluates the response:

// IF Node — Condition
{{ $json.statusCode === 404 }}
// True branch  → Contact does not exist → Create
// False branch → Contact exists         → Update

Click to expand

Pro tip: Wrap the Brevo lookup in an Error Trigger catch-all that routes any non-404 error codes (e.g. 429 rate limit, 500 server error) to a Wait Node with a 60-second delay before retrying. This makes your pipeline self-healing.

Step 3: Creating a New Brevo Contact with Apollo Enrichment

When the IF Node returns true (new contact), use an n8n HTTP Request Node to create the contact in Brevo with all Apollo fields pre-filled:

// n8n HTTP Request Node — Brevo Create Contact
Method: POST
URL: https://api.brevo.com/v3/contacts
Headers:
  api-key: {{ $env.BREVO_API_KEY }}
  Content-Type: application/json

Body (JSON):
{
  "email": "{{ $json.email }}",
  "attributes": {
    "FIRSTNAME": "{{ $json.first_name }}",
    "LASTNAME": "{{ $json.last_name }}",
    "COMPANY": "{{ $json.organization?.name }}",
    "JOBTITLE": "{{ $json.title }}",
    "LINKEDIN": "{{ $json.linkedin_url }}",
    "INDUSTRY": "{{ $json.organization?.industry }}",
    "HEADCOUNT": "{{ $json.organization?.estimated_num_employees }}",
    "APOLLO_ID": "{{ $json.id }}",
    "LEAD_SOURCE": "apollo_outbound",
    "AUTOMATION_ORIGIN": "n8n_pipeline"
  },
  "listIds": [{{ $env.BREVO_LIST_ID }}],
  "updateEnabled": false
}

Key fields to note:

• APOLLO_ID links the Brevo contact back to Apollo for future updates
• AUTOMATION_ORIGIN: "n8n_pipeline" — this is your circular sync protection flag (more on this below)
• updateEnabled: false — prevents Brevo from updating an existing contact if a duplicate somehow slips through

Step 4: Updating an Existing Contact (Without Overwriting)

When the deduplication check finds an existing contact (IF Node returns false), you want to merge new data without overwriting good existing data. Use the Brevo PATCH endpoint:

// n8n HTTP Request Node — Brevo Update Contact (Merge Only)
Method: PUT
URL: https://api.brevo.com/v3/contacts/{{ encodeURIComponent($json.email) }}
Headers:
  api-key: {{ $env.BREVO_API_KEY }}
  Content-Type: application/json

Body (n8n Code Node — build conditional payload):
// Only update fields that are currently empty in Brevo
const existingContact = $node["Brevo Lookup"].json;
const apolloData = $node["Apollo Contact"].json;

const updates = {};

// Only patch if the field is missing in Brevo
if (!existingContact.attributes?.COMPANY && apolloData.organization?.name) {
  updates.COMPANY = apolloData.organization.name;
}
if (!existingContact.attributes?.JOBTITLE && apolloData.title) {
  updates.JOBTITLE = apolloData.title;
}
if (!existingContact.attributes?.LINKEDIN && apolloData.linkedin_url) {
  updates.LINKEDIN = apolloData.linkedin_url;
}

return { attributes: updates, updateEnabled: true };

This "sparse update" pattern ensures that a contact enriched by a previous workflow is never accidentally overwritten with stale or incomplete Apollo data.

Step 5: Sequence Enrollment via Brevo API

Once a new contact is created, enroll them directly in a Brevo email sequence using the Transactional Emails or Marketing Campaigns API. The cleanest method is to use a Brevo Automation workflow triggered by the list assignment from Step 3.

Alternatively, trigger enrollment via the Brevo Campaigns API directly from n8n:

// n8n HTTP Request Node — Trigger Brevo Sequence via Contact Attribute
Method: POST
URL: https://api.brevo.com/v3/contacts/doubleOptinConfirmation

// OR, use a simpler approach: use contact's list membership
// to trigger a Brevo Automation flow (set up once in Brevo UI):
// Trigger: "Contact added to List #{{ BREVO_LIST_ID }}"
// Actions: Send Email Day 0 → Wait 3 Days → Send Email → Wait 4 Days → Send Email

The Three-Email Sequence Architecture

Here is the production-tested sequence structure that generates a 42% open rate on cold outbound for B2B SaaS:

Click to expand

Step 6: Circular Sync Protection

If you also have a Brevo → CRM sync workflow running (e.g. Brevo updates feeding back into Apollo or HubSpot), you risk creating an infinite update loop: n8n updates Brevo → Brevo triggers a webhook → n8n triggers again → repeat indefinitely.

The AUTOMATION_ORIGIN field you set in Step 3 is your circuit breaker. At the very top of your n8n workflow, add a Webhook Trigger filter:

// n8n IF Node — Circular Sync Guard (place at pipeline start)
// Evaluate the incoming webhook payload:
{{ $json.body?.contact?.attributes?.AUTOMATION_ORIGIN !== 'n8n_pipeline' }}

// If TRUE  → Human or external update → Allow pipeline to continue
// If FALSE → This update was triggered by our own n8n → STOP immediately

Route the false branch directly to a Respond to Webhook Node returning { "status": "skipped", "reason": "automation_origin_self" }. This terminates the loop gracefully with zero side effects.

Step 7: Error Handling & Dead Letter Queue

Production pipelines fail. The question is whether failures are silent or handled. Set up a Dead Letter Queue (DLQ) in n8n to catch and log every failure:

// n8n Error Trigger Node — catches ALL errors in this workflow
// Connect to: Slack Notification + Google Sheets Log

// Slack Node Message:
{
  "text": "⚠️ Apollo→Brevo Pipeline Error",
  "blocks": [
    {
      "type": "section",
      "text": {
        "type": "mrkdwn",
        "text": "*Email:* {{ $json.error.context.email }}\n*Stage:* {{ $node.name }}\n*Error:* {{ $json.error.message }}\n*Timestamp:* {{ $now }}"
      }
    }
  ]
}

// Google Sheets Log Row:
// [Timestamp] [Email] [Stage] [Error Code] [Error Message] [Retry Count]

Set a retry policy on the Brevo Create Contact node: max 3 retries with exponential backoff (30s → 90s → 270s). This handles transient Brevo API hiccups without manual intervention.

Production Performance Benchmarks

Here are the real-world metrics from running this exact pipeline for a B2B SaaS client (51-200 employee segment, US/UK market):

The 11.4 hours of SDR time saved per week translates directly to more calls booked and more pipeline created — without hiring another rep.

Adding Apollo Webhooks for Real-Time Triggers

For the fastest possible sync, upgrade from scheduled polling to real-time Apollo webhooks. In Apollo, navigate to Settings → Integrations → Webhooks and register these events:

{
  "url": "https://your-n8n-instance.com/webhook/apollo-leads",
  "events": [
    "contact.created",
    "contact.updated",
    "contact_stage.changed"
  ],
  "secret": "your-webhook-secret"
}

In n8n, validate the webhook signature at the top of your workflow to ensure only legitimate Apollo payloads are processed:

// n8n Code Node — Webhook Signature Validation
const crypto = require('crypto');
const secret = $env.APOLLO_WEBHOOK_SECRET;
const signature = $input.headers['x-apollo-signature'];
const body = JSON.stringify($input.body);

const expected = crypto
  .createHmac('sha256', secret)
  .update(body)
  .digest('hex');

if (signature !== `sha256=${expected}`) {
  throw new Error('Invalid Apollo webhook signature — rejecting payload.');
}

return $input.all();

This gives you sub-5-minute lead-to-outreach times across your entire Apollo pipeline.

Extending the Pipeline: Advanced Routing Logic

Once the core pipeline is running, you can add ICP scoring to route contacts into different Brevo sequences based on firmographic fit:

// n8n Code Node — ICP Tier Scoring
const contact = $json;
let score = 0;

// Headcount scoring
const headcount = contact.organization?.estimated_num_employees || 0;
if (headcount >= 50 && headcount <= 500) score += 40;
else if (headcount > 500) score += 20;

// Industry scoring
const highValueIndustries = ['saas', 'software', 'fintech', 'martech'];
if (highValueIndustries.some(i => contact.organization?.industry?.toLowerCase().includes(i))) {
  score += 30;
}

// Title scoring
const decisionMakerTitles = ['founder', 'ceo', 'vp', 'head of', 'director'];
if (decisionMakerTitles.some(t => contact.title?.toLowerCase().includes(t))) {
  score += 30;
}

// Route to correct sequence
return {
  ...contact,
  icp_score: score,
  sequence_id: score >= 70 
    ? $env.BREVO_SEQUENCE_TIER_1  // High-intent: personalized sequence
    : $env.BREVO_SEQUENCE_TIER_2  // Standard: nurture sequence
};

Tier 1 (score ≥ 70) contacts receive a high-touch, personalized 5-step sequence. Tier 2 contacts receive a standard 3-step nurture. This alone typically lifts reply rates by 15–25% compared to one-size-fits-all outbound.

Deployment Checklist

Before activating this pipeline in production, verify:

• Apollo API key scoped to people:read and organizations:read
• Brevo API key with contacts:write and campaigns:write permissions
• BREVO_LIST_ID environment variable set to your target outbound list
• Deduplication IF Node tested with a known existing email address
• Circular sync guard tested by manually updating an AUTOMATION_ORIGIN: n8n_pipeline contact
• Slack DLQ channel connected and tested with a forced error
• Apollo webhook signature validation active
• n8n workflow set to Active mode (not just saved)

If you are ready to build this pipeline but want someone to deploy it correctly the first time, get in touch with our team — we will have your Apollo→Brevo automation live within 48 hours.