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January 2026 · Available on all plans.
Historical note · January 2026 · Describes Brew as of January 2026. For current behavior, see Integrations.

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What Shipped

Keep your sending infrastructure where it is and use Brew for the creative work. Connect the ESP you already run, and every Brew email can go straight into it. Export it as a reusable template for your own campaigns and flows, or, for Customer.io, have it delivered through your account directly.

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Two Ways an Email Lands

Export as a reusable template: eleven destinations. From any email, Send → Export Template renders the design to production HTML and applies the preview text. It also rewrites Brew’s unsubscribe placeholders to the provider’s own tag format, and creates a reusable template in your account’s library.
  • One-click OAuth: Klaviyo (CODE template), Mailchimp, Brevo, HubSpot
  • API key: Braze, Iterable, OneSignal, SendGrid (dynamic template), Postmark, Mailgun, Mailjet
Send directly through your ESP: Customer.io. Customer.io connects as a delivery provider rather than a template target. You design in Brew, click Send → through Customer.io, and it delivers through your account. It doesn’t push a template. To reuse a design as a Customer.io template you export the HTML and import it into Design Studio manually. See the Customer.io Page for that flow.

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How It Works

1

Connect the ESP

In Integrations, click the provider. Klaviyo, Mailchimp, Brevo, and HubSpot authorize over one-click OAuth.Brew never sees a password or API key. The rest take an API key or two from the provider’s dashboard.
2

Open an email and choose how to send

Open the email in Brew and click Send in the top right. Pick Export Template to push it into the provider’s template library, or (Customer.io) send it through your connected account.
3

Review and go

Name the template, review the subject and preview text, then export or send. You keep execution (campaigns, flows, journeys) in the platform you already trust.

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Get Started

Connect an Integration, then open any email and pick Send.