Sync with your email tool
Reviewed on 5 October 2026
If you already send your newsletters from Mailchimp, MailerLite, ActiveCampaign, Kit or Brevo, you can keep doing it. OnBio sends them your subscribed contacts, unsubscribes and tags.
Connect a tool with an API key
- 1. Click Email in the side menu and open Integrations.
- 2. Click Connect on the tool and paste the API key. In ActiveCampaign, also paste the API URL. In Kit, the list is one of your forms.
- 3. Choose the list under Destination list and click Use this list.
What happens next
OnBio sends the changes every 15 minutes. Each subscribed contact appears in your tool with their name. Tags arrive as tags in Mailchimp, ActiveCampaign and Kit, as groups in MailerLite and as lists in the OnBio folder in Brevo. Each unsubscribe in OnBio is reflected in the next cycle.
Keep in mind
- Sync goes only from OnBio to the tool. What you change there does not come back.
- You can only have one tool connected at a time.
- In Mailchimp you do not need a key. Click Connect and authorise OnBio with your account.
- If the tool rejects the access, follow email tool disconnected.
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