If you have more than one flow live in Klaviyo, it’s normal to wonder whether the same person can qualify for multiple messages at once.
The short answer: yes, they can. A single profile can trigger multiple flow-eligible behaviors in a short window, and whether they actually receive all of those messages depends on your trigger setup, filters, and Smart Sending settings.
This comes up most often when someone:
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views a product, then adds it to cart, then starts checkout
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qualifies for both a welcome flow and an abandonment flow
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is eligible for both email and SMS in the same journey
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re-triggers the same behavior multiple times in a short period
First: qualifying for multiple flows is not the same as receiving every message
Klaviyo can queue the same person for flow messages more than once if they repeat the trigger action, like viewing multiple products or taking the same behavior repeatedly.
But that does not automatically mean every message will send. Smart Sending is designed to help prevent subscribers from receiving too many messages at once from active flows and campaigns, and each channel has its own Smart Sending window.
When overlap is most likely
Overlap usually happens when two or more flows respond to the same moment in the customer journey.
A common example is abandonment. One shopper can:
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view a product
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add it to cart
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start checkout
If you have browse abandonment, added-to-cart abandonment, and checkout abandonment all live without guardrails, that one shopper can qualify for more than one flow.
For Shopify specifically, Klaviyo’s default abandoned cart flow is triggered by Checkout Started, while the Added to Cart flow targets shoppers who have not started checkout yet.
What to do about it
The best fix is not “turn fewer flows on.” It’s to create a clear hierarchy and add guardrails.
1. Prioritize the higher-intent flow
If someone has started checkout, that is usually a stronger signal than just viewing a product or adding something to cart. In practice, that means your lower-intent flows should exclude people who have already moved into a higher-intent one.
2. Use Smart Sending as a safety net
Smart Sending is a good default when you have multiple active flows and campaigns, because it limits how often someone can receive messages in a given window.
A few important notes:
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Smart Sending windows are separate by channel.
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The default window is 16 hours for email and 24 hours for SMS and push.
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Messages skipped due to Smart Sending are not automatically rescheduled.
3. Add flow filters to control entry and re-entry
If the issue is repeated entry, add a profile filter like:
Has not been in this flow in the last X days
That helps limit how often someone can enter the same flow again.
Klaviyo also notes that this specific option is not available for list- and segment-triggered flows, since those only trigger once per recipient.
4. Add message-level filters when frequency is the real problem
If you want to keep a flow live but limit how often someone gets a specific message, Klaviyo recommends using an additional filter on the message itself, such as checking whether someone has already received that subject line within the last X days.
5. Be intentional with email + SMS
SMS can absolutely work alongside email in abandonment flows, but Klaviyo recommends keeping SMS controlled: use quiet hours, send only to people with consent, and only send 1 SMS per recipient in an abandoned cart reminder flow for US recipients.
A simple rule of thumb
If two flows could logically apply to the same person within the same session or same day, assume overlap is possible and build your filters accordingly.
A good audit question is:
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Is this a lower-intent flow or a higher-intent flow?
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What should happen if someone qualifies for both?
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Do I want Smart Sending to be the backstop, or do I want explicit flow filters to decide who gets what?
Related community threads
If you want to see how other Klaviyo users are handling this, these threads are worth bookmarking:
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Excluding customers already in the flow / repeat abandoners — good for re-entry limits and suppression logic.
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Optimizing welcome + abandonment flows: filtering & discount strategy — helpful if you’re trying to avoid overlap between lifecycle and abandonment flows.
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New vs. returning customers split in abandoned cart — useful if part of your overlap issue is that one flow is doing too much for too many audiences.
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Best practices for abandoned cart emails — broad practical advice from other users.
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Conditional split: high value vs. low value cart — useful if you want one flow with smarter routing instead of multiple overlapping ones.
Helpful Klaviyo resources
If you want the official docs behind this setup, start here:
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Understanding Smart Sending in Klaviyo — best starting point for message frequency control.
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Troubleshooting why a profile is scheduled in a flow multiple times — useful if you’re debugging repeat entry.
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How to optimize your flow sending frequency — guidance on timing and spacing messages.
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How to create an abandoned cart flow — baseline setup for checkout abandonment.
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How to create an abandoned “Added to Cart” flow for Shopify — helpful if you’re separating cart vs. checkout intent on Shopify.
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How to add SMS to your abandoned cart flow — useful for coordinating email + SMS without over-messaging.
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Getting started with flows — good refresher on triggers, delays, and filters.
Bottom line
More than one Klaviyo flow can absolutely qualify for the same person. The fix is not to avoid building flows. The fix is to decide which flow should win, use Smart Sending as a backstop, and add clear filters so lower-priority flows step aside when a higher-priority one applies.
If you’ve run into this in your own account, drop your flow setup in the comments. The most useful examples are usually the messy real-world ones.
