Integrations

Email marketing: Brevo, Klaviyo and Mailchimp

Brevo

Updated: 2026-09-17

Step 1: create an API key

Brevo

  1. Open the account menu at the top right and go to SMTP & API.
  2. Open API keys and click Generate a new API key.
  3. Name it "Metrara" and copy the key.

Klaviyo

  1. Open the account menu and go to Settings, API keys.
  2. Click Create Private API Key and name it "Metrara".
  3. Choose Read-only access and copy the key.

Mailchimp

  1. Open your profile menu and go to Extras, API keys.
  2. Click Create A Key and copy it.
  3. The key ends with your data center, for example -us5. Copy the whole key.

Step 2: paste it in Metrara

Agency users

  1. Go to Manage, choose your business and open Access keys.
  2. Under Mail system, choose Brevo, Klaviyo or Mailchimp.
  3. Paste the key in the API key field and click Save.

Client users

  1. Open Connections in the menu.
  2. In the Email marketing block, paste the key in the field of your email system and click Save.

What you see after connecting

Under Email:

  • Statistics: list growth, opens and clicks.
  • Campaigns: results per campaign.
  • AI analysis: what works in your subject lines and send times.
  • Jump on: moments worth sending a newsletter.
  • Newsletter: write your next newsletter with Metri.

Good to know

  • The open rate also counts opens that Apple Mail registers automatically, so it tends to be high. Clicks are a more reliable measure.
  • Revenue per campaign is only shown for systems with e-commerce tracking, such as Klaviyo.
  • List growth builds up from the moment you connect.