Website Visitor Identification ESP

The only Website Visitor ID solution built to protect your brand

Keep your third-party data compliant, protect your deliverability, and lower your ESP contact costs with Customers.ai . 

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Third-Party Data & Your ESP

Strict compliance rules and inaccurate data can lead to serious deliverability issues, making it risky to send third-party data directly to your ESP. That’s why we built the Customers.ai ESP.

Think of Customers.ai as your pre-ESP bouncer. We’ll filter out the tire-kickers, warm up high-intent contacts, and only send your ESP the ones worth hosting. 

Want to ensure your third-party data is 100% compliant? Let us do the emailing for you. Third-party contacts will only be added to your ESP when they purchase or give you their information, making them first-party contacts, and ensuring 100% compliance.

We work alongside your ESP, cutting costs and protecting your brand

Guard your sender reputation and ensure your emails reach the inbox, not the spam folder.

We support existing ESPs and recommend using Customers.ai alongside of, or in place of, your ESP for website visitor identification data.

Website Visitor ID tools generate +10x more emails but also +10x your Klaviyo bill. Save money by keeping your third-party data directly in Customers.ai
Keep your previously anonymous visitor email automations separate. Push contacts to your other ESP when they take a qualifying action or only when they become a paying customer.
Utilize the powerful customer journey and consumer data to segment and power your automations.
Design beautiful, high-impact emails effortlessly that captivate and convert your audience.
Reach and convert website visitors with personalized messaging at scale.

Powering Fast-Growing Ecommerce Brands

Key ESP Features

Customers.ai is more than email capture. We track the entire customer journey, allow for advanced segmentation, and help you build flows that drive sales, all while keeping your third-party data ESP compliant.

Includes 10 email sends per contact

Unlimited email campaigns

Email deliverability tools 

Email warmup

AI email customizer

Analytics & Reporting

Automation builder

CRM integration

Email design tool

Unlimited email automations

Unlimited email aliases

Cut costs of hosting visitor ID data

The Customers.ai ESP is the most cost-effective way to manage your visitor ID contacts

Want to email your visitor ID contacts through the Customers.ai platform? We give you 10 emails per contact, lower than most ESPs.

Kineon + Customers.ai = Real Results

$127.7K

Customers.ai contact purchase value

312

Number of purchases

576%

ROI

In just over 30 days, Kineon generated an additional $15.7K in revenue through targeted email campaigns, achieving a 576% ROI. Thanks to Customers.ai capturing high-intent visitors, Kineon was able to convert those leads into real revenue.

Book a Call

See how our domain-protective ESP is designed for growth and performance for your brand.

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Turn Anonymous Shoppers into Customers with Unmatched Website Visitor ID Accuracy

Most visitor ID solutions get identities right 5-30% of the time. Customers.ai is 2-7x more accurate with 2-18x higher True Match Rate. See the difference on your site firsthand.

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Convert more visitors into customers

Turn anonymous traffic into actionable audiences for your email, ads and direct mail campaigns.

See what accurate Website Visitor ID reveals on your site!

No credit card required.

May 2025 Update: New Brand Insights on the Impact of Data Inaccuracy

Testing by DTC brands revealed a crisis of Website Visitor Identification inaccuracy. Read the newly updated report to understand the damage to brands’ deliverability and performance — and what you can do about it. See the report →

GROW YOUR RETAINERS, DIVERSIFY REVENUE SOURCES, AND MAKE CLIENTS HAPPIER WITH CUSTOMERS.AI FOR AGENCIES.

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