| Acoustic | Pod, client ID, client secret, refresh token, database ID, from name, from address, reply-to address. Optional folder path and visibility. | Mailing template | Updates it |
| ActiveCampaign | API URL and API key | Template | Updates it |
| Airship | App key, master secret and region (US or Europe) | Email template | Updates it |
| Blueshift | User API key and region (US or EU) | Email template | Makes a new one |
| Brevo | API key. Optional sender name and email. | Transactional template | Updates it |
| Customer.io | App API key and region (US or EU) | Design Studio email. Choose HTML email or Editable Design Studio components. | Updates it |
| Emarsys | API username and secret, email category ID, contact list ID, sender name and email | Email campaign | Makes a new one |
| HubSpot | Private app access token (pat-…) | Coded template, in an “EmailLove” folder | Makes a new one |
| Klaviyo | Private API key (pk_…) | Template. Choose HTML template or Editable text and images. | Makes a new one |
| Mailchimp | API key (ending in your data center, such as -us21) | Template | Makes a new one |
| MailerLite | API token, sender name and email | Draft campaign | Updates it |
| MailerLite Classic | API key, sender name and email | Draft campaign | Updates it |
| Mailjet | API key and secret key | Template | Updates it |
| MoEngage | Workspace ID, API key, data center, sender name, and the email of the person creating it. Export as an email template or a content block. | Custom template | Makes a new one |
| Netcore | API key | Template | Makes a new one |
| OneSignal | App ID and app API key | Email template | Makes a new one |
| Pardot | Salesforce domain, business unit ID, consumer key and secret, Salesforce username, password and security token | Email template | Updates it |
| Postmark | Server API token | Template | Updates it |
| Sailthru | API key and shared secret | Template | Updates it |
| SendGrid | API key and region (Global or EU) | Dynamic template | Updates it |
| SendX | Team API key | Email template | Updates it |
| Stripo | API authentication token. Optional template folder ID. | Editable template | Makes a new one |
| Zeta | Site ID and REST API key. Optional template tags. | HTML template | Updates it |