Connect HubSpot to WarmySender

Overview

You can connect HubSpot to WarmySender today. The connection runs on two building blocks that ship with every paid WarmySender plan: an open REST API (so you can read and write data) and real-time, signed webhooks (so WarmySender tells you the moment something happens — a reply, a send, an open). You wire those two sides to HubSpot with a no-code automation bridge — Zapier, Make, or n8n — or with HubSpot's own workflow webhooks, or a small custom endpoint if you have a developer.

Let's be upfront: WarmySender does not have a one-click native HubSpot app in the HubSpot marketplace yet. There's no "Export to WarmySender" button inside HubSpot and no OAuth "Connect HubSpot" toggle in WarmySender. The supported, fully documented path is API + webhooks + a no-code bridge — and it does everything most teams need: pull your HubSpot contacts into WarmySender, and push WarmySender activity back onto your HubSpot records.

Here's what you can do once it's wired up:

WarmySender is a 4-pillar outreach platform — Cold Emailing, Email Warmup, LinkedIn Outreach, and Multichannel sequences. The HubSpot connection feeds all of them: contacts you import can enter an email campaign, a LinkedIn sequence, or a blended multichannel sequence, and every channel's reply and engagement events can flow back to HubSpot.

Why teams run HubSpot outreach through WarmySender

If you already have HubSpot, here's what WarmySender adds on top:

How to connect HubSpot to WarmySender — the 3 steps

The connection always follows the same three steps, whichever bridge you pick. You set up an API key, add a webhook, then connect the two sides to HubSpot.

Step 1 — Create a WarmySender API key

This is how your bridge (Zapier, Make, n8n, or your own code) reads and writes data in WarmySender — for example, creating prospects from HubSpot contacts.

  1. In WarmySender, open Settings › API.
  2. Create a new API key and give it a clear name (something like "HubSpot bridge").
  3. Copy the key and store it somewhere safe — you'll paste it into your bridge tool. Treat it like a password.

API access is included on every paid plan, so there's nothing extra to buy. The full reference — authentication, endpoints, and examples — lives at API & webhooks reference.

Step 2 — Add an outbound webhook

A webhook is how WarmySender tells your bridge the instant something happens — most importantly when a prospect replies, but also when an email is sent, opened, or clicked, when an address bounces, or when someone unsubscribes.

  1. In WarmySender, open Settings › Webhooks and create a new webhook.
  2. Paste in the receiving URL from your bridge (Zapier, Make, and n8n each give you a unique webhook URL — see Step 3).
  3. Pick the events you care about. For HubSpot, most teams start with reply, send, open, and click, plus bounce and unsubscribe to keep the CRM clean.
  4. Save. WarmySender shows you a signing secret once — store it. Your bridge uses it to confirm each notification genuinely came from WarmySender.
  5. Use the test button on the webhook to send a sample event end-to-end and confirm your bridge receives it.

Every webhook is signed (HMAC), so your receiver can verify it's authentic and ignore anything that isn't. Delivery is reliable: if your endpoint is briefly unreachable, WarmySender automatically retries with backoff.

Step 3 — Connect the two sides to HubSpot

Now you join WarmySender to HubSpot. Pick whichever option fits your team — all three are fully supported.

Option A (recommended) — A no-code bridge: Zapier, Make, or n8n

This is the path most teams use. The bridge sits in the middle and translates between WarmySender and HubSpot — no code required.

  1. In Zapier, Make, or n8n, create a flow that starts from a webhook (Zapier's "Webhooks by Zapier › Catch Hook", Make's "Custom webhook", or n8n's "Webhook" node). Copy the URL it gives you and paste it into your WarmySender webhook from Step 2.
  2. Add a HubSpot step to the same flow: for example, "Create or update contact" when a prospect replies, or "Create engagement / note" to log the reply on the contact's timeline. The HubSpot connectors in Zapier, Make, and n8n cover contacts, deals, notes, and tasks.
  3. To go the other direction — HubSpot into WarmySender — start a flow from a HubSpot trigger (for example, "contact added to a list") and add a step that calls the WarmySender API (using your Step 1 key) to create the prospect and enroll them in a campaign.
  4. Turn the flow on. From now on it runs automatically.

Step-by-step walkthrough with example mappings: HubSpot integration guide.

Option B — HubSpot workflow webhooks

If you'd rather drive things from HubSpot, HubSpot's own workflows can send a webhook to WarmySender's API when a contact meets a condition (for example, enters a list or reaches a lifecycle stage). Point a HubSpot workflow webhook action at a small receiver that calls the WarmySender API to create and enroll the prospect.

Option C — A small custom endpoint

If you have a developer, you can skip the bridge entirely: stand up a small endpoint that receives WarmySender's signed webhooks and calls the HubSpot API directly (and, the other way, calls the WarmySender API when something changes in HubSpot). This gives you the most control. The signing-secret verification and the full event list are in the API & webhooks reference.

Is there a native HubSpot app? (the honest answer)

Not yet. There is no one-click WarmySender app in the HubSpot marketplace, no "Connect HubSpot" OAuth button, and no automatic background sync that mirrors every contact or property without you setting up a flow. We'd rather tell you that plainly than imply something we don't ship.

What you get instead is arguably more flexible: an open API and real-time signed webhooks that you connect with the no-code tool you probably already use. It takes a little setup once, and then it runs on its own. You can import HubSpot contacts, and you can push replies, sends, opens, and clicks back into HubSpot as activities or property updates — which is what most teams actually want from a CRM connection.

Why this is safe and reliable

Frequently asked questions

Is there a native HubSpot app for WarmySender?

Not yet — there's no one-click app in the HubSpot marketplace and no OAuth "Connect HubSpot" button. The supported way to connect HubSpot to WarmySender today is through our REST API and real-time webhooks, bridged with Zapier, Make, or n8n (or HubSpot's own workflow webhooks, or a small custom endpoint). You can import HubSpot contacts into WarmySender and push send, open, and reply events back into HubSpot as activities or contact-property updates.

Do I need Zapier?

No — Zapier is just one of several bridges. You can use Make or n8n instead (n8n can be self-hosted, which some teams prefer for privacy). You can also drive the connection from HubSpot's own workflow webhooks, or have a developer build a small custom endpoint that talks to both APIs directly. Pick whichever you're most comfortable with.

Can I sync contacts both ways?

Yes. You can pull HubSpot contacts into WarmySender (create them as prospects and enroll them in a campaign via the WarmySender API), and you can push WarmySender activity back into HubSpot (log replies, opens, and clicks on the matching contact, or update a contact property). You set up one flow per direction in your bridge — they're independent, so you can do one, the other, or both.

Which plan do I need?

Any paid plan. API access and webhooks are included on every paid WarmySender plan, starting at $14.99/mo — there's no separate integrations fee. You'll also need an account with your bridge of choice (Zapier, Make, and n8n all have free or low-cost tiers).

Does it work with Make or n8n?

Yes. Make and n8n work the same way as Zapier: create a flow that starts from a webhook, paste that webhook URL into WarmySender's Settings › Webhooks, then add a HubSpot step. For the other direction, start the flow from a HubSpot trigger and add a step that calls the WarmySender API. Self-hosted n8n keeps all the data on your own infrastructure if that matters to you.

Will replies show up in HubSpot?

Yes, once you've built the flow for it. When a prospect replies — over email or LinkedIn — WarmySender fires a signed reply webhook. Your bridge catches it and writes it to HubSpot the way you choose: as a note or engagement on the contact's timeline, a task for a rep to follow up, or a property update. Because the reply event includes the prospect's details, your bridge can match it to the right HubSpot contact.

Is it secure?

Yes. Every webhook is HMAC-signed so your receiver can verify it genuinely came from WarmySender. Your API key is scoped to your own workspace and can be revoked at any time. Nothing is written to HubSpot except the steps you explicitly build into your flow, and your bridge connects to HubSpot using HubSpot's own secure authentication.

What about Salesforce or Zoho?

The same approach works for any CRM. WarmySender's API and webhooks aren't HubSpot-specific — Zapier, Make, and n8n all have Salesforce and Zoho connectors, so you wire them up exactly the same way: WarmySender events flow out through a webhook into the CRM, and CRM contacts flow into WarmySender through the API. See the API & webhooks reference for the full event list and endpoints.

How long does it take to set up?

A first working flow usually takes about 15-20 minutes once you have your API key and a bridge account: create the key, add the webhook, build one flow, send a test event. From there you can add more flows (the reverse direction, extra events) as you need them.

Want help wiring up a specific HubSpot flow? Email [email protected] with what you're trying to sync and we'll point you to the right setup.