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Are your marketing emails driving as many sales as they could? Successful brands are strengthening campaigns with authentic reviews and UGC, pushing more subscribers to the point of purchase. Here’s how to bring that same impact to your emails with the REVIEWS.io advanced Klaviyo integration.
Please Note:
Account details may vary. The feature is now part of the subscription

Marketing emails are only as strong as the trust they build. And while polished copy and slick designs help, today’s consumers are far more influenced by what other customers have to say.

Why? Because real customer experiences carry more weight than polished brand messaging.

In fact, 82% of consumers say they’d be more likely to purchase from a brand that incorporates UGC into its marketing.

The REVIEWS.io Klaviyo integration makes it easy to bring that authenticity into every email flow, so your campaigns don’t just look good - they build trust and drive action.

Summary

  • Authentic reviews and UGC help build trust in every email and turn subscribers into buyers.
  • The REVIEWS.io Klaviyo integration lets you add shoppable galleries, review blocks, and social proof graphics to email campaigns with ease.
  • Review data can trigger automated workflows, from referral offers after positive feedback to proactive support for unhappy customers.
  • Attributes collected during reviews flow into Klaviyo, enabling smarter segmentation and personalized messaging.
  • As a Klaviyo Elite Partner, REVIEWS.io delivers best-in-class functionality and reliable performance you can trust.

How can I add UGC to my Klaviyo campaigns?

The easiest way to add UGC to your campaigns is to set up the REVIEWS.io Klaviyo integration

In just a few clicks, you can showcase authentic reviews and customer photos that build trust and drive higher click-through rates.

  • Simple setup: code is generated for you, so you can add review and UGC blocks directly through Klaviyo’s editor.
  • Dynamic updates: galleries and review content refresh automatically with your latest submissions.
  • Verified authenticity: only genuine customer reviews and media are pulled into your emails.

Once connected, you have a number of ways to display review content in Klaviyo emails:

1. Dynamic shoppable UGC galleries

Create shoppable UGC galleries from verified customer photos and Instagram content, then embed them into Klaviyo emails.

How to use it:

  • Add a gallery to abandoned cart flows to show real customers enjoying the product the shopper left behind.
  • Include a gallery in post-purchase emails to inspire add-on purchases with authentic cross-sell content.
  • Use seasonal or themed UGC (e.g. summer looks) to make promotions feel community-driven.

Why it works:

  • Customers relate more to authentic lifestyle visuals than polished brand assets.
  • Shoppable galleries create an interactive experience that guides subscribers straight back to checkout.
  • Because they update dynamically, you’re always showing your most influential, up-to-date content without lifting a finger.

2. Product review blocks

Automatically display text reviews, star ratings, and review counts alongside product images inside your emails.

How to use it:

  • In promotional emails, add a product review block under each featured item to provide immediate social proof.
  • In back-in-stock notifications, include ratings and top reviews to give customers confidence to act quickly.
  • In browse abandonment emails, show reviews for the exact product the subscriber was viewing.

Why it works:

  • Star ratings and review snippets reduce buying hesitation and address common objections.
  • Seeing peer validation within the email itself keeps customers moving toward purchase without needing extra clicks.
  • Every product featured becomes a “trust-rich” listing rather than just another SKU.

3. Social proof graphics

Turn your best reviews into branded graphics using our Social Proof Editor, then drop them into Klaviyo emails as attention-grabbing visuals.

How to use it:

  • Add a review graphic at the top of a promotional email to instantly hook the reader.
  • Use them in win-back emails to remind lapsed customers what others love about your brand.
  • Test graphics as hero images in A/B tests to see how they impact open-to-click performance.

Why it works:

  • Visual reviews stand out in crowded inboxes and stop the scroll.
  • They reinforce your brand identity while keeping the customer’s voice front and center.
  • By highlighting your strongest feedback, you create immediate credibility that boosts click-through rates.
product social proof block

With REVIEWS.io’s advanced Klaviyo integration, you can showcase authentic reviews and UGC in emails, turning every send into a trust-led driver of engagement.

How can review data improve my Klaviyo flows?

When synced with Klaviyo, review data becomes a powerful tool for automation and personalization - helping you send the right message, to the right customer, at the right time.

1. Send review requests through Klaviyo

With REVIEWS.io, you have two options for sending review requests.

You can use REVIEWS.io Flow to build custom sequences, or, if you prefer - you can send review invitations from Klaviyo

This option brings all your customer communications into one platform, so every email is consistent and measurable.

How it works:

  • Add review requests into your existing Klaviyo flows.
  • Customize the design to match your brand identity.
  • Track open rates, clicks, and completions alongside your other campaigns.

Benefits:

  • Customers experience review requests as a seamless part of your brand journey.
  • You gain a clear view of performance, making it easier to optimize both marketing and review collection.

2. Trigger intelligent flows from review events

Every review captured in REVIEWS.io can act as a trigger for a post-review flow in Klaviyo, allowing you to respond automatically based on customer sentiment.

How it works:

  • Positive reviews can trigger thank-you emails, loyalty rewards, or referral offers.
  • Neutral reviews can trigger educational content or onboarding support.

Benefits:

  • Customers feel heard and valued in real time.
  • You turn happy reviewers into advocates, while proactively supporting those less satisfied.
  • Each review becomes an opportunity for engagement instead of passive feedback.

3. Personalize campaigns with review attributes

With REVIEWS.io Attributes, you can collect valuable customer data during the review process - like hair type, pet breed, or product preferences.

This then flows directly into Klaviyo for detailed segmentation.

How it works:

  • Sync it with customer profiles in Klaviyo.
  • Use it to create hyper-targeted segments (e.g. launch products to customers who’ve shown interest in that category).

Benefits:

  • Customers receive offers and recommendations tailored to their needs.
  • Personalization feels authentic and relevant, not generic.
  • Highly targeted segmentation leads to stronger engagement and conversion rates.
Syncing review data with Klaviyo unlocks automation and personalization, helping you send the right message to the right customer at the right time.

Bring trust into every Klaviyo flow

Email remains one of the most effective channels in eCommerce. But only when it inspires action. By combining Klaviyo with REVIEWS.io, you can make every send more authentic, more personal, and more profitable.

As an Elite Partner, we work closely with Klaviyo to ensure this integration offers best-in-class functionality and long-term reliability. 

That means you can confidently use review data to strengthen your customer relationships and drive results.

Already a REVIEWS.io customer? Simply set up the Klaviyo integration and start experimenting with UGC galleries, product review blocks, and automated flows. If you need support, our team is here to help.

New to REVIEWS.io? Book a demo today to see how verified customer voices can transform your email marketing.

Frequently asked questions

What is UGC in email marketing?

UGC (User-Generated Content) refers to authentic photos, videos, and reviews created by real customers. Including UGC in your emails adds credibility, strengthens trust, and encourages subscribers to convert.

How do you get permission to use UGC?

Always ask customers for permission before using their content. With REVIEWS.io, this is built into the workflow. You can automatically request usage rights when customers submit photos or tag your brand on social media.

Does UGC improve email marketing performance?

Yes. UGC increases engagement, click-through rates, and conversions by showcasing real experiences that resonate more than branded imagery or copy alone.

What is a Klaviyo partner?

A Klaviyo partner is an approved technology provider offering certified integrations with Klaviyo. As an Elite Partner, REVIEWS.io delivers seamless functionality, expert support, and reliable data syncing for top-tier performance.

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