Herb Mail to Grow List

Hi Will, 

Chiming in here while you await responses from other Community members!  

It looks like a similar question was asked a few years ago, but we did not have much background with that site/platform at the time: 

I can see that we still do not have a native integration with this tool, but I found some other articles from the Herb.co side of things that may be useful!

• What are the benefits of HerbMail's Klaviyo integration?
• How do I integrate Herbmail into Klaviyo?
• How do I integrate Herb Reconnect into Klaviyo?
• HerbMail Success Guide: Turning Emails into $$$
• How do I set up an email sequence in Klaviyo?

From my review, the general benefits of using HerbMail to grow your lists are the following: 

• ​​​​​​HerbMail identifies high-intent visitors on your site—even across different devices and browsers—and captures their data. Connecting it to Klaviyo pushes these newly resolved identities straight into your Klaviyo audience lists in real time.

• HerbMail uncovers data from users who browse your store but leave before filling out a standard newsletter pop-up, it opens up a completely new pipeline for list acquisition.

• When a visitor who's email address you already have in Klaviyo visits your site, but Klaviyo doesn't recognize them (i.e. they're on a new device, cleared browser cookies, etc.), and HerbMail does recognize them, HerbMail connects the dots for Klaviyo, letting Klaviyo know that this session is from the existing identity in Klaviyo. 

Important note: List growth depends on whether the contacts are legally and properly opted in to receive marketing. Klaviyo requires permission-based lists; identity resolution alone should not be treated as blanket email consent. Use clear consent practices, a dedicated welcome or re-engagement flow, and monitor bounce and engagement rates closely. Therefore the integration may increase the number of identifiable, high-intent prospects and improve conversions—but actual list growth will depend on HerbMail’s data-collection and consent model, your implementation, and visitor volume.