Eliminate delay in triggering welcome flow after double opt-in?

Hi @scottm, 

First of all, thanks for setting up the question so nicely and having all the screenshots.  Not only does it make it easier to understand, I think it’ll be helpful for future visitors of this thread. 👍

In your setup, it looks like your “Welcome Flow” is a “Segment Triggered” Flow.  I’m not sure what other rules you have with your Segment, but any Segment triggered Flow can have up to 15 minutes delay as Klaviyo processes Segment periodically.  So depending on what moment the users Subscribe, it might catch it at just the wrong time where it can take 13-15 minutes until they receive their first message.  A bit more detail about Segment Triggered Flows are here if you want the details:

• How a segment-triggered flow works

You can see in that section, it points out:

Customers enter segments through actions (e.g., placing an order or opening an email) as close to real-time as possible. However, if you have a higher volume of customers entering segments, you may see a brief delay (up to one hour) in these updates. 

However, if you switch your Segment Triggered Flow to a List Triggered Flow, then the emails will come almost instantaneously.  In your example, they will get their email closer to the “11:29AM” mark then waiting for it to be process into the “All Subscribers Segment” at 11:40AM.

I’m not sure what other conditions or rules you have for your “All Subscribers Segment” - I assume you’re combining various Lists into one Segment. Alternatively, I recommend you do the opposite, put all your emails into one list (e.g. Newsletter) with different custom properties of each source value (e.g. use the $source value) and then Segment people out of this main List.  So instead of combining multiple Lists into one Segment, you have one Main List (e.g. “Newsletter”) that can then have multiple Segments for your various use cases down the road.  

Give that a try and see if that works.