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Omnisend Shopify Not Syncing

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Ongoing Shopify Updated November 13, 2026Based on 4 user reportsHow we research

Quick answer

Initial Omnisend sync takes up to an hour and history up to 24 hours. After that, check the app is connected, the app embed is on and remember some mismatches are expected.

Most likely fix: Check connection and timing

How to fix it

Try these in order — the most common fix is first.

  1. 1. Check connection and timing

    1. Confirm the store is connected in Omnisend
    2. Confirm the Omnisend app is installed in Shopify admin
    3. Wait up to 1 hour (24 hours for history); new orders appear within about 3 minutes
    Did this fix it?

  2. 2. Enable the app embed

    1. Shopify admin > Online Store > Themes > Customize > App embeds
    2. Turn on the Omnisend embed and save
    Did this fix it?

  3. 3. Understand expected differences

    1. CSV, Zapier and Google Forms contacts stay in Omnisend only
    2. Upload those contacts to Shopify directly if needed
    3. Turn on tag sync in connected store settings for manual tags
    Did this fix it?

  4. 4. Avoid duplicates and deletion

    1. Update email or phone in Omnisend first before changing in Shopify
    2. Do not uninstall the app while troubleshooting; uninstall starts a 16-day account deletion
    Did this fix it?

Symptoms

Contacts, orders or products missing, counts differ from Shopify, or tags do not appear.

Why it happens

  • Initial import still running
  • App not installed or store not connected
  • Shopify 2.0 app embed disabled
  • Contacts added by CSV or Zapier only exist in Omnisend
  • Non-subscribed customers counted in Omnisend but not Shopify marketing
  • Tag sync toggle off, or automated tags (only manual tags sync)

This guide also covers

  • omnisend shopify not syncing
  • omnisend orders not syncing
  • omnisend contacts not syncing

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