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Penumbra Flow Reviews 

1
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TrustScore 3.5 out of 5

3.7

Advertising Agency
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Company details

  1. Advertising Agency

Written by the company

Penumbra Flow is an email marketing agency for DTC ecommerce brands. We help Shopify stores turn more of their existing customers into repeat buyers. Every engagement begins with an LTV and retention cohort analysis. We dig into your Klaviyo and Shopify data to see how each customer cohort behaves, where first-to-second order conversion stalls, how much of your revenue depends on your top customers, and whether your flows are driving real repeat purchases or just taking credit for orders that would have happened anyway. From there we fix what the data points to, across the whole customer journey and not just the inbox.

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3.7

Average

TrustScore 3.5 out of 5

1 review

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3.7

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1 review in the last 12 months

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Rated 5 out of 5 stars

Felt like an extension of our team.

We had a great experience working with Viktor and Juan on our email marketing. They’re dedicated, thoughtful professionals who brought a lot of care and enthusiasm to us.

Clear communication, personal approach, and willingness to think along with us made the collaboration a pleasure. They truly felt like an extension of our team.

We look back on our time together with great appreciation and would highly recommend Viktor and Juan.

13 October 2026
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