Hunter.io + HubSpot: only verified leads get in
Your lead list looks “busy,” but sales is chasing ghosts. Typos, fake emails, and half-filled forms slip through, then you pay for it later with bounces, messy CRM data, and awkward follow-ups.
Marketing managers feel this when campaign reports get distorted. Sales ops deals with duplicates and bad fields. And if you run a small team, you’re the one cleaning it all up. This lead verification automation filters the noise so HubSpot only receives real, usable leads.
You’ll learn what the workflow does, what you need to run it, and how to think about customizing it for your form and qualification rules.
How This Automation Works
Here’s the complete workflow you’ll be setting up:
n8n Workflow Template: Hunter.io + HubSpot: only verified leads get in
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n0["<div style='background:#f5f5f5;padding:10px;border-radius:8px;display:inline-block;border:1px solid #e0e0e0'><img src='https://flowpast.com/wp-content/uploads/n8n-workflow-icons/form.svg' width='40' height='40' /></div><br/>n8n Form Trigger"]
n1["<div style='background:#f5f5f5;padding:10px;border-radius:8px;display:inline-block;border:1px solid #e0e0e0'><img src='https://flowpast.com/wp-content/uploads/n8n-workflow-icons/hunter.png' width='40' height='40' /></div><br/>Hunter"]
n2@{ icon: "mdi:swap-horizontal", form: "rounded", label: "Check if the email is valid", pos: "b", h: 48 }
n3["<div style='background:#f5f5f5;padding:10px;border-radius:8px;display:inline-block;border:1px solid #e0e0e0'><img src='https://flowpast.com/wp-content/uploads/n8n-workflow-icons/clearbit.svg' width='40' height='40' /></div><br/>Enrich company"]
n4["<div style='background:#f5f5f5;padding:10px;border-radius:8px;display:inline-block;border:1px solid #e0e0e0'><img src='https://flowpast.com/wp-content/uploads/n8n-workflow-icons/hubspot.svg' width='40' height='40' /></div><br/>Add lead to Hubspot"]
n5["<div style='background:#f5f5f5;padding:10px;border-radius:8px;display:inline-block;border:1px solid #e0e0e0'><img src='https://flowpast.com/wp-content/uploads/n8n-workflow-icons/clearbit.svg' width='40' height='40' /></div><br/>Enrich person"]
n6@{ icon: "mdi:cog", form: "rounded", label: "Email is not valid, do nothing", pos: "b", h: 48 }
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Why This Matters: Bad Leads Quietly Break Your Funnel
Most lead capture forms are designed to reduce friction, so you keep them short. That’s smart, until it becomes your CRM’s problem. A single missing character in an email address can turn into a bounce, which turns into reps distrusting inbound leads, which turns into slower follow-up. Then there’s the hidden time tax: someone has to check submissions, look up who the person is, guess the company size, and decide if it belongs in HubSpot at all. And honestly, that usually happens when you already have too much to do.
The friction compounds. Here’s where it breaks down in real teams.
- People submit forms with invalid or disposable emails, and they still land in HubSpot as if they were legitimate.
- Your form stays short, which means sales gets almost no context beyond a name and an email.
- Someone ends up manually reviewing submissions and enriching data, usually in a spreadsheet that goes stale quickly.
- Bad data triggers bad outreach, and that can hurt deliverability and brand perception at the same time.
What You’ll Build: Verified Form Leads Enriched Then Sent to HubSpot
This workflow acts like a bouncer for your CRM. When a new lead submits your form, n8n immediately checks the email with Hunter.io. If the email fails validation, the workflow stops and nothing gets created in HubSpot. If the email looks valid, the workflow enriches the person and company with Clearbit so you get context without making your form longer. Finally, it creates the contact/lead in HubSpot with the extra fields attached, so sales can prioritize faster and follow up with more confidence. You keep the front-end experience simple while keeping your back-end clean.
The workflow starts at a form intake trigger. Hunter.io decides if the email gets through. Clearbit fills in the blanks, then HubSpot becomes the system of record with a lead that’s actually worth working.
What You’re Building
| What Gets Automated | What You’ll Achieve |
|---|---|
|
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Expected Results
Say you collect about 20 leads a day. If you currently spend maybe 5 minutes per lead checking the email, searching LinkedIn, and guessing company info, that’s roughly 100 minutes daily. With this workflow, you spend close to zero minutes reviewing the obvious junk: the form triggers instantly, Hunter.io filters invalid emails, and Clearbit enriches the record before HubSpot ever sees it. You still review the good leads, but now you’re looking at real contacts with useful context, not a list of maybes.
Before You Start
- n8n instance (try n8n Cloud free)
- Self-hosting option if you prefer (Hostinger works well)
- Hunter.io for email verification checks.
- Clearbit to enrich person and company details.
- HubSpot to store verified leads in your CRM.
- Hunter API key (get it from your Hunter dashboard).
- Clearbit API key (get it from your Clearbit account settings).
- HubSpot private app token (create a Private App in HubSpot).
Skill level: Beginner. You’ll connect accounts, map a few fields, and test with sample submissions.
Want someone to build this for you? Talk to an automation expert (free 15-minute consultation).
Step by Step
A form submission triggers the workflow. The built-in form trigger catches each new entry the moment it’s submitted, using the production URL once you go live.
The email gets verified before anything else happens. Hunter.io checks the submitted email address and returns a status you can trust for filtering.
Only “good” emails move forward. An If condition evaluates Hunter’s result. Invalid entries go to a “do nothing” path, so HubSpot stays clean.
Clearbit enrichment fills in context, then HubSpot gets the lead. First the person profile is enriched, then organization details, and the combined data is used to create the lead/contact in HubSpot with mapped fields.
You can easily modify the qualification logic to require things like a company size, industry, or a non-free email domain based on your needs. See the full implementation guide below for customization options.
Step-by-Step Implementation Guide
Step 1: Configure the Form Trigger
Set up the intake form that initiates the lead enrichment workflow.
- Add the Form Intake Trigger node as the workflow trigger.
- Set the Path to
0bf8840f-1cc4-46a9-86af-a3fa8da80608. - Set the Form Title to
Contact usand Form Description toWe'll get back to you soon. - Add a form field with the label What's your business email?.
What's your business email? because downstream expressions reference it.Step 2: Connect Email Verification
Validate incoming emails before enrichment and CRM creation.
- Add the Email Verification Lookup node and connect it after Form Intake Trigger.
- Set the Operation to
emailVerifier. - Set the Email field to
{{ $json['What\'s your business email?'] }}. - Credential Required: Connect your hunterApi credentials.
Step 3: Set Up Email Validation Routing
Route valid emails to enrichment and invalid emails to a safe endpoint.
- Add the Validate Email Status node and connect it after Email Verification Lookup.
- Configure the condition to compare Left Value
{{ $json.status }}with Right Valuevalidusing equals. - Connect the true output to Enrich Contact Profile.
- Connect the false output to Invalid Email No-Op.
{{ $json.status }} will fail and route all data to Invalid Email No-Op.Step 4: Enrich and Create CRM Lead
Enrich the person and organization data before creating the HubSpot lead.
- Add Enrich Contact Profile and set Resource to
person. - Set the Email field to
{{ $json.email }}in Enrich Contact Profile. - Credential Required: Connect your clearbitApi credentials to Enrich Contact Profile.
- Add Enrich Organization Details and set Domain to
{{ $json.employment.domain }}. - Credential Required: Connect your clearbitApi credentials to Enrich Organization Details.
- Add Create HubSpot Lead and connect it after Enrich Organization Details.
- Set Authentication to
oAuth2and set Email to{{ $('Validate Email Status').item.json.email }}. - Map Job Title to
{{ $('Enrich Contact Profile').item.json.employment.title }}, First Name to{{ $('Enrich Contact Profile').item.json.name.givenName }}, Last Name to{{ $('Enrich Contact Profile').item.json.name.familyName }}, Company Name to{{ $('Enrich Contact Profile').item.json.employment.name }}, and Company Size to{{ $json.metrics.employees }}. - Credential Required: Connect your hubspotOAuth2Api credentials.
Step 5: Test and Activate Your Workflow
Verify the full flow from form submission to CRM lead creation.
- Click Execute Workflow and submit the form in Form Intake Trigger with a valid business email.
- Confirm Email Verification Lookup returns
statusasvalidand that Validate Email Status routes to the true path. - Check that Enrich Contact Profile and Enrich Organization Details return data and that Create HubSpot Lead creates the contact in HubSpot.
- Toggle the workflow to Active to run it in production.
Troubleshooting Tips
- Hunter.io credentials can expire or be rate-limited. If verification suddenly returns errors, check your Hunter dashboard usage and then update the API key inside n8n.
- If you’re using Wait nodes or external rendering, processing times vary. Bump up the wait duration if downstream nodes fail on empty responses.
- Default prompts in AI nodes are generic. Add your brand voice early or you’ll be editing outputs forever.
Quick Answers
About 30 minutes if your API keys are ready.
No. You’ll mostly connect accounts and map fields to HubSpot.
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 Hunter.io and Clearbit API costs, which depend on your usage and plan.
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.
Yes, and you probably should. You can swap the form intake trigger for Typeform, Google Forms, or SurveyMonkey, then keep the same Hunter.io check and HubSpot create step. The most common tweak is the “Validate Email Status” If node, where you can also require business emails (no gmail.com), specific countries, or a minimum company size. You can also reroute the “Invalid Email No-Op” path into Google Sheets for review instead of ignoring it.
Usually it’s an expired or wrong token from a HubSpot Private App. Regenerate the token, confirm the app has the right CRM scopes (contacts and any custom objects you write to), then update the credential in n8n. If it fails only sometimes, check HubSpot API limits and confirm you aren’t sending empty required fields after Clearbit enrichment.
On self-hosted n8n, volume is mostly limited by your server and API rate limits from Hunter.io, Clearbit, and HubSpot.
Often, yes, because the filtering logic is the whole point here. n8n makes it straightforward to branch on Hunter’s verification result, stop cleanly on invalid entries, and enrich in multiple steps without paying extra for each path. You also get a self-host option, which matters when form volume climbs and per-task pricing starts to sting. Zapier and Make can absolutely do this too, but you’ll usually feel the cost sooner, and complex field mapping gets tedious. If you’re unsure, Talk to an automation expert and we’ll sanity-check your setup.
Once this is running, HubSpot stops filling up with junk. You get cleaner data, better follow-up, and a funnel that finally reflects reality.
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.
