What This Integration Does
This integration uses HubSpot CRM events to trigger emails sent through SendGrid’s delivery infrastructure. When a deal stage changes, a contact property is updated, or a workflow condition is met in HubSpot, the integration sends the relevant data to SendGrid, which delivers the email using your configured templates, sender authentication, and delivery optimisation.
This is for teams that manage their contacts and pipeline in HubSpot but need SendGrid’s transactional email capabilities for specific message types. HubSpot’s native email tools handle marketing campaigns well, but transactional emails — order confirmations, account notifications, onboarding sequences with dynamic content, password resets — are better served by a dedicated transactional email provider like SendGrid that offers higher deliverability guarantees, dedicated IP management, and detailed delivery analytics.
The integration bridges the gap. HubSpot holds the data and the trigger logic. SendGrid handles the delivery. Your team manages contacts in one place and gets the deliverability and template flexibility of a purpose-built email API.
The Workflow
HubSpot fires a webhook when a configured event occurs — a deal reaches a specific stage, a contact enters a workflow, a property value changes, or a form is submitted. The integration receives the webhook, extracts the contact data and event context, and makes an API call to SendGrid’s Mail Send endpoint.
The SendGrid call specifies the dynamic template ID and passes the personalisation data as template variables. SendGrid renders the template with the contact’s name, deal details, account information, or whatever dynamic content the template requires, then delivers the email through your authenticated sending domain.
For transactional emails (order confirmations, account notifications), the integration calls SendGrid immediately with no batching or delay. For marketing-style triggered emails (onboarding sequences, lifecycle campaigns), the integration can apply send-time optimisation by queuing the call with a calculated delay based on the contact’s timezone or preferred send window stored in HubSpot.
Delivery status flows back into the integration. SendGrid’s Event Webhook sends delivery, open, click, bounce, and spam report events to a callback endpoint. The integration matches these events to the originating HubSpot contact by email address and logs the delivery outcome. For bounces and spam reports, the integration can update a custom HubSpot property to flag the contact, preventing future sends to problematic addresses.
Before and After
Before: HubSpot sends all emails — marketing and transactional — through its own email infrastructure. Transactional emails share the same sending reputation as bulk campaigns, risking deliverability for time-sensitive messages. There is no dedicated IP for transactional mail. Delivery analytics for individual transactional emails are limited. When a deal closes in HubSpot, someone manually triggers the onboarding email or copies data into a separate system.
After: Marketing campaigns stay in HubSpot’s email tool. Transactional and triggered emails route through SendGrid with dedicated sending infrastructure, template-level analytics, and delivery optimisation. Deal stage changes, contact updates, and workflow triggers in HubSpot automatically fire the right SendGrid email with the right data. Bounces and spam reports feed back into HubSpot so your contact data stays clean.
Who Needs This
This integration is for teams that use HubSpot as their CRM and need SendGrid for specific email delivery requirements. It is the right fit if:
- You need transactional emails (account notifications, confirmations, receipts) sent with higher deliverability guarantees than HubSpot’s bulk infrastructure provides
- You want to use SendGrid’s dynamic templates for triggered emails while keeping all contact management in HubSpot
- You need dedicated IP addresses for transactional email to protect your sending reputation from bulk campaign volume
- Your compliance or security requirements mandate that certain email types are sent through infrastructure you control (SendGrid on your own account) rather than a CRM’s shared pool
- You want granular delivery analytics (delivery time, bounce classification, link tracking) per transactional email type
How We Build This
We start by identifying which email types should route through SendGrid versus staying in HubSpot’s native email tool. Typically, marketing campaigns stay in HubSpot while transactional, triggered, and high-priority lifecycle emails move to SendGrid. For each email type, we define the trigger event in HubSpot and the corresponding SendGrid template.
HubSpot webhook subscriptions are configured through a custom app with the required scopes. Each webhook event type (deal stage change, contact property change, workflow enrolment) is mapped to a specific SendGrid template and personalisation payload. The integration processes webhooks in a queue with deduplication logic.
SendGrid integration uses the Mail Send v3 API with API key authentication. Dynamic templates are created in SendGrid’s template editor with Handlebars syntax for variable substitution. The integration populates the personalisation object with data pulled from the HubSpot webhook payload and, where needed, supplementary data fetched from HubSpot’s API (associated company details, deal line items, custom object data).
SendGrid’s Event Webhook is configured to send delivery events to a callback endpoint. The integration parses these events, matches them to HubSpot contacts, and optionally updates HubSpot properties. Hard bounces and spam reports trigger a property update that HubSpot workflows can use to suppress future sends.
Testing covers each trigger-to-delivery path: the HubSpot event fires, the webhook is received, the SendGrid email is sent with the correct template and personalisation data, and delivery events flow back to the callback endpoint. We verify template rendering with real contact data and confirm that bounces and complaints are handled correctly.
Start Routing the Right Emails Through the Right Infrastructure
If all your emails — marketing blasts and time-sensitive notifications alike — go through the same pipe, you are trading deliverability for convenience. We build the integration that lets HubSpot manage the logic while SendGrid handles the delivery.
Get in touch to discuss your HubSpot and SendGrid integration.
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Alex
I’m a software developer and CEO of Digital Royalty, helping growing teams scale their SaaS platforms without losing quality, visibility, or control. I focus on building structured, maintainable systems with clear processes, reporting, and accountability. With over a decade of experience across agency and in-house roles, I specialise in delivering long-term, scalable solutions that support complex, evolving products.