Join the Klaviyo ecosystem

You will learn

If you’re here, you’re interested in building a standout app with Klaviyo, and we’re excited to help you get featured in our Integration Directory!

In this guide, you will:

Discover the benefits of building with Klaviyo.
Explore apps that enhance the Klaviyo experience.
Learn how our app submission and review process works.
Get answers to common integration questions.

What is a Klaviyo app?

Klaviyo apps are web apps that extend Klaviyo’s functionality. Our customers turn to public apps hosted on Klaviyo’s App Marketplace to solve their specific business needs. Klaviyo apps drive strong business outcomes for merchants by using Klaviyo’s APIs to automate customer journeys. For example, an app may request access to update a customer’s profile data via Klaviyo’s Profiles API so that it can add custom profile properties (e.g., loyalty program points) for better segmentation.

Why build with Klaviyo?

By building with Klaviyo, you’ll tap into a network that offers limitless partner-to-merchant and partner-to-partner opportunities. We work with over 170,000 top merchants and over 5,000 innovative agency and system integrator partners offering solutions to creators around the world.

Our philosophy is simple: We are an open platform and encourage all partners who can benefit our mutual and future customers to integrate with us.

Looking to boost your brand visibility, customer engagement, and revenue? Discover how Grid & Pixel and other businesses do just that with custom Klaviyo apps:

Standout Klaviyo apps

Klaviyo is a data-first platform designed to make it easy for businesses to know their customers and grow faster. We value and prioritize partners who offer strong customer-centric integrations.

Within the categories below, learn about some standout integrations built with Klaviyo’s powerful APIs (see all available directory categories for more information).

Rewards & loyalty

Rewards & loyalty apps are management software that incentivize customers to engage with products and/or services of a specific brand by offering rewards for purchasing products.

Smile.io’s app is powered by Klaviyo’s Campaigns, Flows, and Segments APIs to:

Welcome new members
Send reward program emails directly from Klaviyo.
Automate loyalty messaging
Build custom flows using program events like points earned or redeemed.
Reward VIPs
Segment lists based on program data such as VIP tier or points balance.
Incentivize reviews
Strengthen customer relationships by motivating shoppers to leave product reviews.

Shipping

Shipping and returns play a critical role in the post-purchase customer journey. Over 2800 brands use Loop’s integration to fully personalize their shipping notifications.

Automated status notifications
Automatically notify customers of return status updates.
Personalized recommendations
Use Klaviyo to send personalized return instructions and recommendations based on customer purchase history and return patterns.
Enhanced customer retention
Create targeted Klaviyo campaigns to incentivize customers to opt for exchanges instead of returns.

Support & help desk

Support & help desk software enables customer support to manage customer-care related issues.

Zendesk helps 6900+ brands deliver personalized interactions with customers. Key features include the ability to:

Deliver faster ticket responses
Sync replies from Klaviyo SMS & emails to Zendesk and host all customer conversations in one place.
Win back dissatisfied customers
Configure a winback flow triggered from the “Ticket Resolved” metric that uses ticket content and tagging to personalize interactions.
Convert tickets into sales
Leverage insight from Klaviyo in Zendesk and turn responses from email/SMS marketing efforts into revenue generating interactions.

Building a Klaviyo app for the first time?

We have interactive API documentation, targeted integration guides, and a developer community to help you build a best-in-class app with Klaviyo. Below are some high-level steps to get started:

Follow our developer Get Started series.
Learn about our app listing requirements so that you are aware of what requirements your app will have to meet.
Map out your use cases and the relevant data connections to and from Klaviyo.
Test your integration by sending data to, and retrieving data from, Klaviyo. Check that your API calls have successfully sent data to Klaviyo via the UI.

Ready to submit your app?

The resources below offer guidance to prepare your app for our Integration Directory:

Klaviyo app listing requirements
Confirm that your app complies with our app listing requirements.
Create help docs for your integration
Create help docs that will benefit customers using your app.
Pass your app review
Learn best practices to cut down review time and boost your app’s changes of approval.

Once you’re ready to submit, follow our Submit your app for review guide.

App submission and review process

To be published on Klaviyo’s Integration Directory, all public apps must undergo an app review. After you’ve submitted your app, our team will follow up via email if the app has been approved or requires additional changes before approval. For more information on the review process, see our Submit your app for review guide.

Support resources

App publishers are required to provide users with clear, up-to-date support resources for their users. We have help doc templates available so that you can include the 3 different types of help content for your customers: an installation guide, a data reference, and a use-case how-to.