Klaviyo Trustpilot Integration: Setup, Use Cases & Best Practices (2025)
Email Marketing · Social Proof

Klaviyo Trustpilot Integration: Setup, Use Cases & Best Practices

10 min read By Sendora Team

Customers trust other customers more than brand promises. By connecting Trustpilot with Klaviyo, you can automatically embed real reviews into your emails and SMS — turning passive feedback into active persuasion that drives conversions at every stage of the customer journey.

What This Guide Covers
  • Step-by-step setup of the Trustpilot ↔ Klaviyo integration
  • How to insert Trustpilot review widgets into Klaviyo campaigns
  • Filtering options — star ratings, product vs. service reviews
  • Use-case campaigns that drive ROI (welcome, cart abandonment, win-back)
  • Troubleshooting common issues and best practices

Why Integrate Trustpilot with Klaviyo?

Integrating Trustpilot with Klaviyo transforms customer reviews from static web content into dynamic, revenue-driving marketing assets. Instead of manually pasting testimonials, you automatically feature the freshest reviews in flows and campaigns — adding authenticity while reducing the friction of trust-building.

Dynamic Social Proof

The Trustpilot widget auto-updates to display your most recent reviews matching your filters — star rating, product type, or keywords.

Lifecycle Relevance

Embed 5-star product reviews in abandoned cart flows, or highlight service reviews in post-purchase emails — at the exact moment it matters.

Conversion Lift

Emails with embedded star ratings and customer quotes consistently see higher click-through rates and improved purchase conversion.

Scalable Trust

Every message reinforces credibility — without any extra manual work. Klaviyo handles distribution, Trustpilot delivers the validation.

How to Set Up the Klaviyo Trustpilot Integration

The integration takes four steps: connect your accounts, customise your widget, link the data feed, and embed the widget into campaigns. Here’s exactly how to do it.

1

Connect Trustpilot with Klaviyo

  • In Klaviyo, go to Settings → Account → API Keys
  • Create a Private API Key — name it, select Metrics and Campaigns, then click Create
  • Copy the key immediately (Klaviyo only shows it once)
  • In Trustpilot Business, go to Integrations → Marketing → Klaviyo, paste the key, and click Connect
⚠ Important Save your Private API Key immediately after creation — Klaviyo won’t show it again. Store it securely in a password manager.
2

Customise Your Widget

  • In Trustpilot, go to Integrations → Marketing → Klaviyo → Customise your widget
  • Choose Product Reviews (enter SKUs) or Service Reviews
  • Select a layout, then filter by tags, star ratings, or number of reviews
  • Changes save automatically
Note Only one widget can be active at a time. Any changes to the widget apply across all campaigns using it — plan accordingly before editing live campaigns.
3

Connect the Data Feed

  • Copy the Data Feed URL from Trustpilot
  • In Klaviyo, go to Settings → Other → Web Feeds → Add Web Feed
  • Paste the URL, set Request Method = GET and Content Type = XML
  • Save the feed and note the name you give it — you’ll need it in Step 4
4

Add the Widget to Your Campaigns

  • In Klaviyo, create or edit a campaign and add a Text block
  • In Trustpilot, copy the widget code
  • In Klaviyo, paste it into the Text block’s Source code, replacing ##FEED_NAME## with your Web Feed name
  • Preview the email, finalise your campaign, and send — or run an A/B test first

What Data Actually Syncs Between Trustpilot and Klaviyo

A common misconception: the Trustpilot integration does not push review data into Klaviyo customer profiles. The native integration is widget-based only — no review text or star rating is written to profile properties. That means you can’t segment on “left a 5-star review” without extra setup.

If you need deeper control, you have two options:

Trustpilot API

Developers can use the Service Review API to pull review data and pass it into Klaviyo as custom properties or metrics. This unlocks segmentation on review behaviour — like sending loyalty points to 5-star reviewers.

Zapier Integration

Non-technical teams can set up a Zap that pushes “New Review Submitted” into Klaviyo as a custom event — unlocking segmentation and automation without writing any code.

Quick Rule If your goal is displaying reviews in emails, the native widget is enough. If you want to act on review behaviour — rewarding reviewers, triggering flows, or segmenting by rating — you’ll need the API or Zapier approach.

Top 5 Campaign & Flow Use Cases with Trustpilot Reviews

Embedding Trustpilot reviews into Klaviyo isn’t just cosmetic — it’s a strategy that drives measurable retention and conversions. Align reviews with lifecycle flows and you reassure customers exactly when they need it most.

🛒
Cart Abandonment — Overcome Objections
Showcase 5-star product reviews in your abandoned cart flow to address hesitation and push undecided buyers over the line. Pairing reviews with urgency (low stock, expiring discount) works especially well.
📦
Post-Purchase — Request Reviews + Build Loyalty
Embed a live widget and invite customers to add their own review. Showing existing social proof in the same email increases submission rates — it signals others are already participating.
👋
Welcome Flow — Establish Credibility Fast
Highlight service reviews that demonstrate your reliability in welcome emails. New subscribers are evaluating whether to trust your brand — let other customers do the persuading for you.
🔄
Win-Back — Rebuild Trust with Inactive Buyers
Use positive testimonials to re-engage subscribers who haven’t purchased in 90+ days. Reviews remind lapsed customers what they liked about your brand without sounding like a hard sell.
🎯
Promotions — Combine Urgency with Validation
Add recent customer praise alongside discount offers or flash sales. Reviews validate the purchase decision at the exact moment someone is weighing whether the deal is worth it.

Measuring the ROI of Klaviyo Trustpilot Integration

Adding reviews isn’t just about aesthetics — it’s about proving value to stakeholders. Track these four metrics to quantify the impact of social proof on your Klaviyo campaigns.

CTR
Compare campaigns with reviews vs. without
CVR
Measure completed purchases after embedding reviews
RPR
Revenue per recipient — assess flow performance with reviews
★
Review submission rate — track participation growth over time
Pro Tip Run an A/B test inside Klaviyo — one version with embedded reviews, one without. Even a small lift in CTR compounds significantly at scale. Use Klaviyo’s built-in reporting suite to track each variant over at least 7 days before calling a winner.

Troubleshooting the Klaviyo Trustpilot Integration

Most integration issues come down to API keys, widget configuration, or data feed settings. Here’s what to check when things don’t work as expected.

Problem Likely Cause Fix
Widget not showing in email Incorrect feed name in widget code Confirm ##FEED_NAME## is replaced with your exact Klaviyo Web Feed name
API connection failing Invalid or expired Private API Key Generate a new API Key in Klaviyo with Metrics and Campaigns permissions
Reviews not updating Web Feed not refreshing or cached Check the Feed URL is correct and re-save the Web Feed in Klaviyo settings
Only old reviews showing Widget filter too restrictive Loosen star rating or keyword filters in Trustpilot widget settings
Widget broken on mobile Layout not responsive Preview on mobile in Klaviyo before sending; choose a single-column widget layout
Cannot trigger flow on review submission Native integration is widget-only Use Zapier or the Trustpilot API to push “Review Submitted” as a Klaviyo custom event

Best Practices for Success

  • Keep review snippets concise — under 150 characters for email clarity
  • Use star icons for instant trust recognition before the subscriber reads a word
  • Verify you have permission to display reviews before publishing
  • Always test on mobile to ensure widgets display correctly across devices
  • Only display 4–5 star reviews in emails — low ratings do the opposite of build trust

Frequently Asked Questions

Do I need a specific Trustpilot plan to use the Klaviyo integration? +
Yes. The Klaviyo integration is available on Trustpilot Business plans that include marketing integrations — Plus, Premium, Advanced, and Enterprise.
Can I choose which reviews appear in my Klaviyo emails? +
Yes. Use filters to show only 4–5 star reviews, product-specific reviews, or reviews that include certain keywords. This keeps your email social proof relevant and positive.
Will the Trustpilot widget slow down my email loading times? +
No. Trustpilot’s widget is lightweight and designed to load quickly within Klaviyo campaigns without impacting deliverability or rendering speed.
Can I use Trustpilot reviews in Klaviyo SMS campaigns? +
Yes. While the widget is email-focused, you can extract review snippets and star icons for SMS messages — giving you quick social proof in a text format.
How often do reviews refresh in Klaviyo campaigns? +
Reviews refresh automatically, ensuring your campaigns always display the most recent feedback matching your filter settings — no manual updates needed.

Key Takeaways

  • Dynamic social proof: Embed auto-updating Trustpilot reviews directly into Klaviyo emails — no manual work.
  • Filter for relevance: Choose reviews by star rating, product vs. service type, or specific keywords.
  • Boost lifecycle flows: Add reviews to welcome, cart abandonment, post-purchase, and win-back campaigns.
  • Extend with Zapier or API: Unlock “Review Submitted” triggers and profile-level segmentation beyond the native widget.
  • Measure the impact: Track CTR, conversion rate, and revenue per recipient to prove ROI to stakeholders.

Struggling to prove the ROI of your reviews?

We’ll help you set up the Klaviyo Trustpilot integration and build flows that turn customer feedback into conversions — book a free audit today.

Book Your Free Audit →
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