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Real-time, two-way sync for Klaviyo

Whalesync lets you connect data between Klaviyo and all your other apps. Simple, reliable, two-way sync. Without writing code.

Klaviyo
Airtable
Notion
Supabase
Google Sheets
Postgres

Empowering top operators — From startups to enterprises

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Series C
$350M
Webflow
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$330M
Descript
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$100M
Close
Deepgram
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$72M
Gorgias
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$30M
Givebutter
Series A
$50M
Clay
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$86M
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integrations

Popular Klaviyo connections

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Klaviyo

Email

Airtable

Spreadsheet
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Klaviyo

Email

Google Sheets

Spreadsheet
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Klaviyo

Email

HubSpot

CRM
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Klaviyo

Email

Notion

Spreadsheet
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Klaviyo

Email

Supabase

Database
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connector

A deeper Klaviyo integration

About

Klaviyo is where many ecommerce brands keep their customers: every subscriber is a profile with contact details, an address, and whatever custom properties the store sends along, grouped into lists and segments that drive email and SMS campaigns. With Whalesync, a Klaviyo account becomes three tables you can sync with Airtable, Notion, Google Sheets, or a database. Profiles sync both ways, custom properties and list membership included, so a row added in Airtable lands in the right Klaviyo list and an edit made in Klaviyo comes back to the sheet. Lists can be created, renamed, and deleted from the other side, while segments, consent, and Klaviyo’s predictive analytics come across read-only. Whalesync never sends a message to anyone and never deletes a profile.

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Read docs

Category

Email

Supported Objects

Profiles
Supported
Lists
Supported
Segments (read-only)
Supported
Get in Sync

Powerful features, built for reliability

Get the power of an engineering-grade data sync with the simplicity of a no-code tool. Whalesync lets you build a robust, two-way, real-time sync between your apps in minutes, all through a simple visual interface.

Real-time & historical sync

Instantly sync new changes and bring over all your historical data. Your records will be up-to-date across apps from day one.

Efficient error handling

Instant email alerts for quick issue monitoring.

Automatic API handling

Forget about rate limits. Whalesync automatically manages API traffic and retries to ensure your sync runs smoothly without breaking.

Advanced filters

Precision filtering for targeted
data sync.

Blog

Klaviyo guides

Title card reading ‘It’s Klaviyo time’ with Klaviyo underlined and the Klaviyo logo
Sep 24, 2026

Announcing Our Klaviyo Connector

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Security + Scale

Built for Enterprise

Sync your data with top-grade security, role based access control, SSO, and audit logs.

Whalesync Enterprise

Security

Enterprise-grade data safety with SOC 2 Type II, GDPR compliance, and encryption at rest monitored by Vanta.

Scale with support

Easily manage issues at scale, while knowing you have a dedicated account manager on stand by to support.

Case Study

Webflow built products 5x faster with Whalesync

How Webflow deployed Whalesync to launch three different internal products, resulting in significant time and efficiency savings and new, unique capabilities for their teams.

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$4B valuation
600+ employees
30k
Data points synced

Webflow's marketing team can more confidently manage multiple streams of data because they trust Whalesync to handle the complexity of ensuring that data is updated across multiple, different live websites.

“If Whalesync didn’t exist, we simply wouldn’t have been able to build some of these products to the same degree of capability nor achieve the same time and efficiency savings that they provide.”

Corey Moen
Staff Brand Designer, Web

Frequently asked questions

Yes! Whalesync offers true two-way sync. Unlike most apps that offer one-way syncs in two directions, Whalesync actually keeps your data in sync bi-directionally. Update data in one app and see it instantly to sync to the other (or vice-versa).

When a record syncs for the first time it becomes a record in sync. For example, if you sync 10 rows from Airtable to Webflow, you will have 10 records in sync. We do not "double-count" records across the two different apps.

Unlike other automation tools that count updates or tasks, Whalesync allows unlimited updates: those records can change as many times as you'd like.

A sync is a connection between two different apps (e.g. Salesforce & Airtable). When you turn sync on, Whalesync will continuously sync data between your apps.

A single sync includes as many data tables and field as you'd like.

You bet! We've simplified all the annoying parts of setting up a sync with Zapier. We support multi-reference fields, rich text, and images. For a full list, see our supported fields docs.

If data can't be synced (e.g. a required field is missing), Whalesync will alert you on the Issues page. This alert provides the exact error from your destination app and any other info that will help you fix the issue. In the meantime, Whalesync will continue to sync all data that doesn't have errors.

Absolutely! We love supporting organizations that are making the world a better place, so we're happy to offer a 20% discount to all nonprofits. To apply, just send us a note with proof of your nonprofit status (e.g. your 501(c)(3) determination letter) to support@whalesync.com and we'll get the discount applied to your account.

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Related connectors

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Airtable

Spreadsheet

Airtable is an easy-to-use relational database in the browser. Whalesync two-way syncs its bases with Notion, HubSpot, Webflow, and more.

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Google Sheets

Spreadsheet

Google Sheets is the free web-based spreadsheet in Google Workspace. Whalesync two-way syncs your sheets with Airtable, Notion, HubSpot, and more.

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HubSpot

CRM

HubSpot is a leading CRM platform for marketing, sales, and service. Whalesync two-way syncs its contacts and deals with Airtable, Notion, and more.

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Other connectors

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Linear

Project Management

Linear is a fast, design-centric project tracker for software teams. Request early access to two-way sync its issues with Airtable, Notion, and more.

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Coming soon

Mailchimp

Email

Mailchimp is an all-in-one email marketing platform for growing audiences. Request early access to two-way sync its contacts with Airtable and more.

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Memberstack

No-Code

Memberstack adds user logins and payments to your website without code. Whalesync two-way syncs its members with Airtable, Notion, and Google Sheets.

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Connect your tools in minutes