# Classic API compatibility

If you are currently using the Classic API and wish to migrate to Next-gen, please first consult the following table in order to properly assess the impact of your migration.

| Next-gen v1.0                    | Classic                                              | Compatibility              |
| -------------------------------- | ---------------------------------------------------- | -------------------------- |
| Campaigns                        | Mailing                                              | Compatible                 |
| N/A                              | Mailing with type 'recurring'                        | Only available in Classic  |
| N/A                              | Mailing with type 'absplit'                          | Only available in Classic  |
| List                             | List                                                 | Compatible                 |
| Contact                          | List / Record                                        | Compatible                 |
| Custom Attribute                 | List / Fields                                        | Compatible                 |
| Segment                          | List / Sublist                                       | Compatible                 |
| Suppressed Email                 | SuppressionList                                      | Compatible                 |
| Transactional Email              | Relay                                                | Compatible                 |
| Transactional Email through SMTP | N/A                                                  | Only available in Next-Gen |
| Log                              | Mailing / Log<br />List / Log<br />Relay / Log<br /> | <br />Compatible           |
| Report                           | Mailing / Log<br />List / Log<br />Relay / Log<br /> | <br />Compatible           |
| Account                          | Client                                               | Compatible                 |
| Sub-Account                      | Client                                               | Compatible                 |
| User                             | User                                                 | Compatible                 |
| Form                             | N/A                                                  | Only available in Next-Gen |
| Domain                           | Client                                               | Compatible                 |
| Logo                             | N/A                                                  | Only available in Next-Gen |
| Sender                           | N/A                                                  | Only available in Next-Gen |
| N/A                              | TemplateV2                                           | Only available in Classic  |
| N/A                              | Trigger                                              | Only available in Classic  |
| N/A                              | Permission                                           | Only available in Classic  |
| N/A                              | Campaign                                             | Only available in Classic  |

Cakemail Next-gen also provides a way to add a **Login to Cakemail** or **Login to Email Marketing** from inside your app or control panel.

Its implementation differs from that of Cakemail Classic, and instructions can be found in the [Login to Next-gen from inside your app](https://docs.cakemail.com/api/guides/partners-login-to-api-from-app) guide.