Automate Klaviyo & SendGrid

Stop paying for mismatched spreadsheets. Sync data between Klaviyo and SendGrid in real-time, so you can manage your operations without the busywork.

Get This Workflow Built

Custom API Integration

Secure Data Transfer

Done-For-You Setup

How the Data Flows

graph LR
    subgraph Source ["Klaviyo"]
        T1(["Fetch Custom Actions"])
    end
    
    subgraph Middleware ["Enterprise Integration Core"]
        W[CRON API
Poller] --> V{Validation
& Auth}
        V -->|Fail| DLQ[Dead Letter
Queue]
        V -->|Pass| Map[Data Mapping
& Transformation]
        Map --> Retry[Rate Limiting
& Retries]
    end
    
    subgraph Target ["SendGrid"]
        A1(["Create or Update Contact"])
    end

    T1 -->|JSON Payload| W
    Retry -->|Authenticated API POST| A1

    style Source fill:transparent,stroke:#cbd5e1,stroke-dasharray: 5 5
    style Target fill:transparent,stroke:#cbd5e1,stroke-dasharray: 5 5
    style Middleware fill:#f8fafc,stroke:#94a3b8,stroke-width:2px
    style T1 fill:#3b82f6,stroke:#fff,stroke-width:2px,color:#fff
    style W fill:#1f2937,stroke:#fff,stroke-width:1px,color:#fff
    style V fill:#1f2937,stroke:#fff,stroke-width:1px,color:#fff
    style Map fill:#1f2937,stroke:#fff,stroke-width:1px,color:#fff
    style Retry fill:#1f2937,stroke:#fff,stroke-width:1px,color:#fff
    style DLQ fill:#ef4444,stroke:#fff,stroke-width:1px,color:#fff
    style A1 fill:#e11d48,stroke:#fff,stroke-width:2px,color:#fff

When Klaviyo and Sendgrid operate separately, customer engagement metrics can become fragmented. For instance, if a user subscribes to a newsletter in Klaviyo, that data may not be reflected in Sendgrid, leading to missed opportunities for targeted email campaigns. The marketing team may find themselves manually entering subscriber information into Sendgrid, wasting valuable hours and increasing the risk of human error, such as duplicate entries or incorrect email addresses.

Top Ways to Automate Klaviyo & SendGrid

Automated Customer Segmentation: Effortlessly sync customer data between Klaviyo and SendGrid to create targeted segments based on behavior and preferences, ensuring your messaging is always relevant and timely.
Streamlined Campaign Management: Automate the process of transferring campaign data and performance metrics between platforms, allowing for real-time analysis and quicker adjustments to optimize your marketing efforts.
Triggered Email Campaigns: Set up automated workflows that trigger personalized email campaigns in SendGrid based on customer actions tracked in Klaviyo, enhancing engagement and driving conversions without manual intervention.

How to Build the Klaviyo → SendGrid Sync

In Klaviyo, set up a Standard Webhook under the 'Webhooks' section to trigger on the 'Subscribe' event. Configure the webhook to send a POST request to your designated endpoint.
In the webhook settings, specify the payload to include relevant user data such as 'email', 'first_name', and 'last_name'. This will ensure that all necessary subscriber information is captured.
On your server, create an endpoint that listens for incoming POST requests from the Klaviyo webhook. This endpoint should parse the incoming JSON payload to extract the 'email', 'first_name', and 'last_name' fields.
Once the data is extracted, format it according to Sendgrid's REST API requirements. Construct a POST request to the Sendgrid endpoint: 'https://api.sendgrid.com/v3/marketing/contacts'. Include the extracted data in the request body as JSON.
Send the POST request to Sendgrid to insert the new contact. Ensure that you include the necessary authentication headers, such as your Sendgrid API key.

Developer Warnings & API Gotchas

Ensure that the email address is validated before sending it to Sendgrid. Invalid email formats can lead to failed API calls and unnecessary error handling.
Pay attention to the data types in the payload. Klaviyo may send 'first_name' and 'last_name' as strings, but if Sendgrid expects them in a different format, the API call will fail.
Be cautious of duplicate entries in Sendgrid. If a user subscribes multiple times, Klaviyo will trigger the webhook each time, so implement a check to prevent sending the same email address to Sendgrid more than once.

Supported API Operations

We leverage official, stable endpoints to ensure secure data transfer. No deprecated legacy routes.

When this happens in Klaviyo... Fetch Custom Actions

Do this in SendGrid Create or Update Contact
When this happens in Klaviyo... Get List

Do this in SendGrid Find List by Name
When this happens in Klaviyo... Get Metric

Do this in SendGrid Send Email
When this happens in Klaviyo... Get Tag

Do this in SendGrid Send Email (Legacy)

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I can see you're looking at mapping Klaviyo to SendGrid. Tell me about your current setup—what's the specific bottleneck you're trying to automate right now?