Migrate / Mailjet to Klaviyo
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Migrate from Mailjet to Klaviyo
Pick a Mailjet list and a Klaviyo list. OpenContact reads the contacts from Mailjet, keeps a copy, and writes them to Klaviyo. No export file, no upload.
What gets copied
- Subscribed contacts are copied into the Klaviyo list.
- Unsubscribed, bounced, complained or suppressed contacts are not added to the list. They stay excluded.
- Custom fields: Mailjet contact properties become Klaviyo profile properties. Fields that already exist are reused, matched by name, and values are converted to the field type.
- Saved segments are not copied. Rebuild them in Klaviyo from the tags or fields they use.
Check first, then move
- Connect Mailjet (API key + secret) and Klaviyo (Private API key).
- Choose the source list and the destination list.
- Check what will happen. The preview copies nothing. It shows the source count, how many of the first 100 contacts would be copied, excluded or skipped, which custom fields will be created, and how tags arrive.
- Confirm that your Klaviyo plan can take the contacts, then start. Follow fetched, pushed and failed totals as it runs. Pause and resume at any time.
Good to know
Moving to Klaviyo
- Klaviyo keeps one contact per person, so the destination count can be lower than the source total when people are in several lists.
After the move
Sync rules keep Mailjet and Klaviyo consistent from now on, and suppression stays honored in both. See suppression sync.
Questions
Will unsubscribed Mailjet contacts be re-subscribed in Klaviyo?
No. Unsubscribed, bounced, complained and suppressed contacts are not added to the list. They are excluded at the destination where the tool allows it, and their status is updated in OpenContact. A migration never makes someone mailable who was not mailable before.
What if some contacts fail to copy?
They do not stop the migration. Each failure is kept with its reason. When it finishes you can download the failed contacts as CSV or retry just those contacts, without reading Mailjet again.
Can I move more than one list from Mailjet?
Yes. Use Move a whole account: each list is matched to a Klaviyo list with the same name, and the lists move one at a time.
Will my automations in Klaviyo fire during the migration?
OpenContact does not run sync rules or verification during a migration. Check your own automations in Klaviyo before you start.
Related
List migration · Mailjet · Klaviyo · Mailjet to mailchimp · Email pricing explained · All migrations