How To Find Companies Using Klaviyo

🔍 Quick Overview For Those in a Rush

As always, we advise you to read the full article to get the most out of it since context matters a lot, but if you're in a rush, here's a 30-second summary:

Based on my analysis, there are approximately 165367 websites that use Klaviyo, though absolute verification would require direct confirmation.

Throughout the article, I’ll show you several methods on how to find companies using Klaviyo, step-by-step for each one:

1. The Datablist method (best for building lead lists)
2. The WhatRuns method (not suited for lead list building)

How To Find Companies Using Klaviyo: The Datablist Method

The Datablist method is pretty simple, fast, accurate, and most importantly it’s affordable; not like BuiltWith aka. designed to make you poor, which charges $295/month.

Why You Want to Choose Datablist to Find Companies Using Klaviyo

Before I explain to you why Datablist is the best choice to find companies using Klaviyo, let me tell you what Datablist is.

Datablist is an all-in-one platform for lead list building, workflow automation, data enrichment, and cleaning, offering over 50 lead generation tools, including a Technology Finder, Waterfall Email Finder, Sales Navigator scraper, AI agents, LLM processors, and more.

Price Isn't Everything But Still Important

• Datablist’s plans start at $25/month.
• The most affordable plan allows you to find 1000 companies using Klaviyo.
• You can get pay-as-you-go credits, which allow you to find more companies using Klaviyo without committing to higher plans.

Not Just More Data But Also More Accurate Data Than Other Tools

• Datablist’s Technology Finder is powered by Wappalyzer data, which is known for being the most accurate technographic data provider on the market ^[1]
• Datablist’s Technology Finder allows you to get the version numbers of many technologies, which is useful for launching target growth campaigns.

Datablist Can Detect Any Website Facing Technology

• Free methods like Google search operators & MyIP.ms work only for hosting providers, which limits your opportunities.
• Datablist detects any technology (including Klaviyo) since it scans the source code, headers, scripts, and more.

An Entire Lead Generation Ecosystem

We don’t just give you an account list; we give you the ability to work with it. This means once you get a list of companies using Klaviyo, you could:

• Enrich the accounts with live LinkedIn data.
• Run in-depth research (at scale) about the companies using Datablist’s AI research agent.
• Filter your account lists for maximum relevance.
• Find leads within those accounts.
• Find qualified emails & mobile phone numbers using Waterfall Enrichment.

I could list 10 things more to give you an idea of why Datablist is the best option for finding companies that use Klaviyo, but I think you get the point, which is: If it’s for lead list building purposes, Datablist is the way to go.

That’s it with the pitch (was a very good one), now let me show you how to find companies using Klaviyo step-by-step.

Finding Companies Using Klaviyo: The Step-by-Step Guide

This will probably be the easiest step-by-step guide you've ever seen. I split the process into two phases, which you can click through in about 2 minutes, yes, 2 minutes!

1. Signing up & creating a collection in Datablist.
2. Using the Technology Finder to search for companies using Klaviyo.

(Yes, that's how easy it is)

Phase 1 of Creating a List of Companies Using Klaviyo: Preparation

The preparation phase is very easy, so easy that it is done with just a few clicks.

To get started, go to Datablist.com and sign up.

Once you sign up, create a Collection.

Now, click on Find Companies By Technologies.

That’s it with the prep. Now the fun part!

Phase 2 of Creating a List of Companies Using Klaviyo: Search & Filter

When you open the Technology Finder of Datablist, you’ll see 4 filter categories:

1. Technology filter
2. Website filter
3. Company filter
4. Limits and exclusions

Now I’ll show you how I use those filters to find sportswear brands from Germany.

Step 1: Using the technology filter

The first filter is a technology category, which I’ll skip, and use the second one to filter by a specific technology: Klaviyo

👉 Check out Wappalyzer's full list of tracked technologies.

The third filter is the matching operator, which helps with multi-technology searches.

Here’s how it works:

1. Option: Or operator, use this if you want to find companies running on Shopify or BigCommerce. This is the default setting.
2. Option: And operator, use this if you want to find companies using Shopify + Klaviyo

For my example, this setting is not important, so I’ll skip it.

Step 2: Using website filters.

First, use keywords to narrow down your search. You can include and exclude keywords present on the homepage. e.g., 'sportswear', 'not health'. Use commas to write several keywords: Ex: 'fashion,clothes,baby'.

💡 2 Tips for Keyword Filtering

Tip 1: Test your keywords first - Wappalyzer doesn't match every keyword, and many return no results. Verify your keyword using the Wappalyzer Keyword Search tool before building your list.

Tip 2: Focus on homepage content - Only use keywords likely to appear on homepages (brands, product categories, industry terms). Avoid searching for specific details like shipping policies or product specifications.

Now, select the countries you want to target.

Then, select the languages of the website. If you select more than one language, Datablist will return websites available in one of the languages you selected.

Step 3: Using company filters.

The company filters allow you to do two things:

1. Focus your search on industry verticals. For some technologies, the tool already tells what industry vertical they’re in (I’ll leave it open for simplicity).
2. Choose the company size you want to target. I’ll leave this also open.

Step 4: Set limits and define exclusions

First, you can exclude results from a previously created list.

⚠️ Note: Exclusions are recursive. If you exclude list “A” when creating list “B”, then excluding “B” in a new list will also exclude “A”.

Now, you can set a limit on how many websites you want to have for each technology.

⚠️ Note: This limit is for each technology means if you set up a limit of 1000 while searching for Klaviyo + Shopify, you’ll get 2000 results.

Lastly, you can set a slice rule for your search. This useful feature lets you filter websites based on their traffic volume. For example, selecting "Highest traffic" will return the most popular websites in your results.

This setting only matters when your search finds more websites than your limit allows. If your search returns fewer results than your limit, all websites will be included regardless of traffic.

Once you’ve set up all your filters, click on Continue.

Now, you’ll see all the data points Datablist will return as configured output fields. To complete the process, navigate to the bottom of the page and click Run import now.

After a few minutes, your collection should contain a bunch of companies using Klaviyo

Here’s a detailed overview of the data that Datablist delivers:

Technology & Website Data

Technology, Technology Versions, Last Verified, Traffic Rank, Root Path, Website URL, Meta Title, Meta Description, Responsive, Copyright Year.

Company Data

Company Name, Inferred Company Name, Industry, About Company, Company Size, Company Type, Founded Year, Total Funding (USD), Funding Rounds, Employees, Countries, Languages, Locations.

Contact Information

Phone Numbers, Email Addresses, Unverified Email Addresses, WhatsApp Numbers, LinkedIn, Facebook, Twitter, Instagram.

Alternative: Checking If a Company Uses Klaviyo with WhatRuns

WhatRuns is a browser extension that detects technologies running on websites you visit. Unlike Datablist or other methods that help you build lists of companies, WhatRuns is designed for one-off verification - checking if a specific website uses a particular technology.

🔍 Using WhatRuns for Klaviyo

Note: This method works for verifying if a company is using a technology, but it's not suited for building lead lists. We included it anyway because:

1. It's perfect for quick verification when you need to confirm a technology on a specific site
2. It's completely free - just install the browser extension
3. It works for almost any technology, including frontend, backend, and hosting services
4. It complements list-building methods by letting you verify findings from other sources

How WhatRuns Works

WhatRuns operates as a browser extension (available only for Chrome) that analyzes websites in real-time as you browse. When you visit a website and click the WhatRuns icon, it:

• Scans the page source code to identify JavaScript libraries, frameworks, and CMS platforms
• Analyzes HTTP headers to detect server-side technologies and hosting providers
• Inspects loaded resources like CSS frameworks, analytics tools, and third-party services
• Identifies marketing tools such as email marketing platforms, CRM integrations, and advertising pixels

The extension displays all detected technologies in an organized, easy-to-read format, categorized by type (CMS, analytics, frameworks, etc.).

The Critical Limitation: This Only Works for Individual Sites

WhatRuns can only check technologies on websites you manually visit, one at a time. This makes it effective for:

• Verifying competitors' tech stacks when you know their specific websites
• Confirming findings from Datablist or other detection methods
• Quick tech stack research on a handful of target companies
• Learning what technologies power websites you admire

However, this method completely fails when you need to:

• Build lists of hundreds or thousands of companies using a specific technology
• Automate technology detection across many websites
• Export and analyze data about multiple companies
• Filter companies by location, industry, or other criteria

The fundamental reason is simple: WhatRuns is designed for manual, one-site-at-a-time inspection, not scalable lead generation. It's a research tool, not a prospecting tool.

Step-by-Step: Using WhatRuns to Check If a Site Uses Klaviyo

Step 1: Install the WhatRuns Browser Extension

1. Visit the WhatRuns website: Navigate to whatruns.com in your browser

2. Choose your browser: Click on the appropriate download link for Chrome, Firefox, or Edge

3. Install the extension: Follow your browser's standard extension installation process

4. Pin the extension: Pin WhatRuns to your browser toolbar for easy access

Step 2: Navigate to the Website You Want to Check

Simply visit the website in your browser that you want to analyze for Klaviyo usage. For example, if you want to check if a competitor uses Klaviyo, just go to their homepage or any page on their site.

Step 3: Run the WhatRuns Extension and Review Results

1. Click the WhatRuns icon: Run the extension while on the website

2. Review the detected technologies: WhatRuns will display all technologies it found, organized by category

3. Search for Klaviyo: Look through the categories (or use the search function) to see if Klaviyo is listed

That's it! You now know whether this specific website uses Klaviyo or not

The Limitations of The WhatRuns Method

While WhatRuns is excellent for quick verification, it has significant limitations for lead generation:

• No bulk detection - You must visit each website manually, one at a time
• No list building - Results aren't saved or exported in a usable format for prospecting
• Time-consuming at scale - Checking 100+ sites would take hours of manual clicking
• No filtering or segmentation - Can't filter by industry, location, company size, etc.
• No contact data - Provides zero information about decision-makers or contact details
• No automation - Every check requires manual intervention

Bottom line

WhatRuns is perfect for answering "Does this specific company use Klaviyo?" but terrible for answering "How do I get a list of companies using Klaviyo?"

When to Use WhatRuns vs. Datablist

Here's a simple decision framework:

Use WhatRuns when you:

• Need to verify technology on 1-10 specific websites
• Want to quickly check a competitor's tech stack
• Are doing qualitative research on technology choices
• Need to confirm findings from other methods
• Don't need contact information or firmographic data

Use Datablist when you:

• Need to find hundreds or thousands of companies using a specific technology
• Want to build a lead list for outreach
• Need filtering by location, industry, or company size
• Require contact information and company data
• Want to automate the discovery process
• Need to export data for your CRM or outreach tools

Think of WhatRuns as a magnifying glass, perfect for close inspection. Think of Datablist as a telescope, designed to scan a bigger landscape and identify many targets at once.

Conclusion: Finding Companies Using Klaviyo Is Easy

The right tool depends on what you need. Use WhatRuns for quick manual checks on single sites. Use Datablist when you need to scan hundreds of companies and turn that data into a full lead generation workflow.

FAQ About Finding Companies Using Klaviyo

What’s The Fastest Way to Create a List of Companies Using Klaviyo

The fastest way to create a list of companies using Klaviyo is to use a Data Enrichment platform like Datablist, which is powered by the most accurate data on the technographic market (according to users, not us^[3]).

Is There a Tool That Helps Me Create a List of Companies Using Klaviyo

Yes, Datablist is specifically designed for creating lists of companies using particular technologies. Unlike manual methods, Datablist offers a comprehensive Technology Finder that allows you to quickly build lead lists based on technology usage, with additional filtering options for location, industry, and company size.

Is a Technology Finder Free to Use?

While there are free methods like Google Search Operators, MyIP.ms lookups, and the WhatRuns browser extension, these are manual and time-intensive. Professional technology finders like Datablist offer more comprehensive data and automation capabilities, but typically require a subscription for full functionality.

How Can I Know If a Company Is Using a Specific Tool?

There are several ways to verify if a company uses a specific technology. For individual websites, you can use the WhatRuns browser extension to detect technologies in real-time. For more comprehensive verification, Datablist provides technology detection with high accuracy. Other methods include checking website source code or using Google search operators, though these are less reliable.

Is There a Cheaper Way to Create a List of Companies Using a Technology than BuiltWith?

Yes, Datablist offers a cost-effective alternative to BuiltWith for creating technology-based company lists. While free methods exist (Google search operators, MyIP.ms, WhatRuns), they're extremely time-consuming for large-scale lead generation. Datablist combines accuracy, reasonable pricing, with automation and Data enrichment capabilities, making it an attractive option for businesses seeking technology-based leads without the exaggerated price tag of BuiltWith.

Can I Find Companies Using Klaviyo For Free?

Yes, there are a few Technology Lookup methods available for free, including the Google Search Operators method, the MyIP.ms method, and the WhatRuns method. However, they’re all manual and time-intensive. For fast, accurate, and scalable Technology Lookup, you can try Datablist.com

Can ChatGPT help me find companies using Klaviyo?

Yes, ChatGPT could do this, but it's limited to only a few websites. The method that ChatGPT would use is checking the website source code for snippets like WhatRuns and conducting an extra verification step by the MyIP.ms / Whois lookup method. If you need to find companies using Klaviyo at scale, you can check out Datablist's Technology Finder.

Citations

• [1] According to a Stack Overflow user, "Wappalyzer is the most reliable tool in most cases" when comparing different technology detection platforms.

• [2] Koala, a leading Shopify analysis tool, states that "Wappalyzer is designed to be quick, accurate, and easy to use" when comparing it to other technology detection options like BuiltWith.

• [3] Hacker News users confirm that "BuiltWith can be very inaccurate" while "Wappalyzer is fairly accurate"