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HubSpot’s Sequences API is read and enroll only — it does not expose endpoints to create sequences or email templates. That means when you use HubSpot as the sending platform for AI Sequences, Avina cannot build the sequence for you the way it does for Outreach, Salesloft, Instantly, Lemlist, or Smartlead. Instead, the flow is:
  1. You build an empty sequence shell in HubSpot (the sequence, its steps, its delays, its sender settings).
  2. Avina writes per-contact personalized copy into custom properties on the Contact and Company records.
  3. You reference those custom properties as personalization tokens in the sequence’s email templates, so HubSpot merges Avina’s AI-drafted copy at send time.
This is more work than the other platforms, but it’s a one-time setup per sequence.

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Prerequisites

  • A Sales Hub Professional or Enterprise (or Service Hub equivalent) subscription — required for sequences.
  • Sequences and Edit property settings permissions on the HubSpot user doing the setup.
  • A personal email inbox connected to HubSpot (team/conversations inboxes can’t send sequence emails).
  • The Avina ↔ HubSpot integration connected. See the HubSpot overview if you haven’t done this yet.

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Step 1 — Create custom properties for Avina’s drafts

For each email step in your sequence, you’ll need one property to hold the subject line and one to hold the body, on either the Contact or the Company record (Contact is the most common choice).
1

Open the property editor

In HubSpot, click the settings icon in the top nav → Properties in the left sidebar.
2

Select the object

Click the Select an object dropdown and choose Contact properties (repeat later for Company properties if your sequence merges company-level copy too).
3

Create the body property for step 1

Click Create property, then:
  • Property label: Avina — Email Body 1
  • Field type: Multi-line text
  • Click Create property.
4

Create the subject property for step 1

Click Create property again:
  • Property label: Avina — Email Subject 1
  • Field type: Single-line text
  • Click Create property.
5

Repeat for every sequence step

Repeat the two steps above for every email step your sequence will have (e.g., Email Body 2, Email Subject 2, and so on). Each Avina step needs its own property pair.
Keep the labels in a consistent pattern (Avina — Email Body {n} / Avina — Email Subject {n}). Avina matches on the label when writing drafts, and a consistent naming convention makes it obvious which property belongs to which step.

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Step 2 — Create the sequence shell in HubSpot

1

Open Sequences

In HubSpot, navigate to Automations → Sequences (or Sales → Sequences).
2

Create a new sequence

Click Create sequence in the top right, select Start from scratch, and click Create sequence.
3

Name the sequence

Click the pencil icon at the top of the sequence editor and give it a descriptive name. This is the exact name you’ll select in Avina when wiring up the AI Sequence.
4

Add an Automated email step

Click the + icon → Automated email. Click Create template to build the step 1 template in-place.
5

Insert Avina's personalization tokens into the template

In the template editor:
  1. Click in the Subject field, then click the Personalize dropdown → Contact property → search for Avina — Email Subject 1 → Insert.
  2. Click into the body, then click the Personalize dropdown → Contact property → search for Avina — Email Body 1 → Insert.
Leave a fallback value blank unless you want HubSpot to send a default message if Avina hasn’t written a draft yet for that contact.
6

Save the template

Save the template and attach it to the step. Set the delay (for step 1, this is typically zero).
7

Repeat for every step

Add an Automated email step for each subsequent step, inserting Avina — Email Subject {n} and Avina — Email Body {n} as the tokens. Set delays between steps as you would for any normal sequence.
8

Configure sender, timing, and unenrollment

Configure the sequence’s default send times, sender, and automatic unenrollment triggers as usual. Save the sequence.
Use Automated email steps (not Manual email task steps) for any step where Avina’s draft should go out without rep intervention. Manual-email-task steps pause the sequence and require a human to click send.

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Step 3 — Wire the sequence up in Avina

1

Create a new AI Sequence

In Avina, navigate to Sequences → Create Sequence.
2

Pick HubSpot as the sending platform

When prompted for the sending platform, pick HubSpot.
3

Select your HubSpot sequence

Instead of Avina creating a new HubSpot sequence, you’ll see a picker listing the sequences that exist in your connected HubSpot org. Select the one you created in Step 2.
4

Match Avina's steps to your HubSpot properties

For each step, confirm the Contact (or Company) property pair Avina should write into. Avina populates these properties every time a contact is enrolled into the sequence.
5

Activate

Activate the AI Sequence. When a signal triggers enrollment, Avina will:
  1. Draft personalized subject + body for each step based on the signal context.
  2. Write the drafts to the custom properties on the Contact (and Company) record.
  3. Enroll the contact into the HubSpot sequence.
  4. HubSpot’s Automated email step reads the personalization token at send time, merging Avina’s draft into the outgoing email.

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What to do if you change the sequence

Because Avina doesn’t manage the HubSpot sequence shell, edits flow in one direction only:
  • Adding a step in HubSpot: create the matching Avina — Email Subject/Body {n} properties first, then add the Automated email step referencing them. Finally, in Avina, re-select the sequence so Avina picks up the new step.
  • Deleting or renaming a sequence in Avina: the corresponding HubSpot sequence is not deleted. Go to HubSpot and delete or rename it manually.
  • Changing step order: if you reorder steps in HubSpot, make sure the property tokens match the new order (step 1 template references Body 1, step 2 references Body 2, etc.), otherwise Avina’s drafts will end up in the wrong email.

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Troubleshooting