Klaviyo Multiple Accounts: The Complete Guide to Managing Multiple Clients in 2025

You landed your first e-commerce client. Then your second. Then your fifth. Now you’re managing nine different Klaviyo accounts, and every morning starts the same way: logging out of one account, logging into another, checking campaigns, switching again, losing track of which client you’re even looking at.

Sound familiar?

If you’re an agency, a marketing consultant, or a multi-brand business owner, managing multiple Klaviyo accounts is both a blessing and a curse. It’s a blessing because it means you’re growing. It’s a curse because Klaviyo wasn’t originally designed for this use case, and the constant account switching is eating up hours of your week.

The good news? Klaviyo has evolved. With features like multi-account access and the new Klaviyo Portfolio (launched in April 2024), managing multiple accounts has become significantly easier. But there are still challenges, security concerns, and best practices you need to know.

This comprehensive guide will walk you through everything you need to know about managing multiple Klaviyo accounts, from the basics of multi-account setup to advanced strategies for agencies managing dozens of clients.

Managing multiple client accounts? Ensure maximum security and account isolation with Multilogin’s professional multi-account management solution. 

Can You Have Multiple Klaviyo Accounts?

Let’s start with the basics. Yes, you can have multiple Klaviyo accounts. In fact, Klaviyo officially supports multi-account access, allowing you to log in once and switch between multiple accounts using the same email address and password.

This is a game-changer for agencies and consultants who manage multiple clients. Instead of maintaining separate login credentials for each client (which is a security nightmare), you can access all your client accounts from a single login.

How Klaviyo Multi-Account Works:

• You create separate Klaviyo accounts for each client or brand
• Each account uses the same email address and password
• You can switch between accounts seamlessly without logging out
• Each account maintains its own data, integrations, and billing

This system works well for most use cases, but it has limitations that we’ll explore later in this guide.

How to Create Multiple Klaviyo Accounts Using the Same Email Address

Setting up multi-account access in Klaviyo is straightforward. Here’s how to do it:

Step 1: Create Your First Klaviyo Account

If you don’t already have a Klaviyo account, create one using your primary email address and a secure password.

Step 2: Create Additional Accounts

To create a second (or third, or tenth) Klaviyo account:

1. Go to the Klaviyo sign-up page
2. Use the same email address you used for your first account
3. Use the same password
4. Complete the account setup for the new client or brand

Step 3: Switch Between Accounts

Once you have multiple accounts set up:

1. Log into Klaviyo
2. Click on the account name in the bottom-left corner of the dashboard
3. A dropdown menu will appear showing all your linked accounts
4. Click on the account you want to switch to
5. The dashboard instantly switches to that account

No logging out, no password juggling, no confusion. It’s that simple.

Introducing Klaviyo Portfolio: Multi-Account Management on Steroids

In April 2024, Klaviyo launched Klaviyo Portfolio, a feature specifically designed for agencies and multi-brand businesses managing multiple Klaviyo accounts. This is the biggest upgrade to multi-account management since Klaviyo launched.

What is Klaviyo Portfolio?

Klaviyo Portfolio is a centralized hub that streamlines multi-account management by providing:

1. Unified Performance Dashboard

Instead of switching between accounts to check metrics, Portfolio gives you a single view of performance data across all your accounts. You can see:

• Total revenue across all brands
• Email and SMS performance metrics
• Campaign results
• Flow performance
• Comparative analytics

This is huge for agencies that need to report on multiple clients or brands that want to compare performance across regions.

2. Asset Sharing Across Accounts

One of the biggest time-wasters in multi-account management is recreating the same flows, templates, and segments for each client. Portfolio allows you to:

• Clone high-performing flows across accounts
• Share email templates between brands
• Replicate segments and automation
• Roll out best practices instantly

If you’ve built a killer abandoned cart flow for one client, you can deploy it to all your clients in minutes instead of hours.

3. Centralized Billing Management

Managing billing for multiple Klaviyo accounts used to mean juggling multiple invoices, payment methods, and renewal dates. Portfolio centralizes:

• All account billing in one place
• Unified invoicing
• Centralized payment methods
• Easy cost tracking across accounts

4. Universal User Access Control

Portfolio makes it easy to manage team access across multiple accounts:

• Add team members to multiple accounts at once
• Set role-based permissions across accounts
• Control who can access which client data
• Maintain security and compliance

Who Should Use Klaviyo Portfolio?

• Marketing agencies managing multiple client accounts
• Multi-brand businesses (e.g., a parent company with multiple product lines)
• Consultants managing several e-commerce brands
• Enterprise businesses with regional accounts

How to Manage Multiple Klaviyo Accounts: Best Practices

Managing multiple Klaviyo accounts efficiently requires more than just switching between them. Here are the best practices that successful agencies and multi-brand businesses follow:

1. Establish a Clear Naming Convention

When you’re managing nine different Klaviyo accounts, you need a system to keep them organized. Establish a naming convention like:

• For Agencies: “Client Name – Brand Name”
• For Multi-Brand Businesses: “Brand Name – Region” or “Brand Name – Product Line”

This makes it instantly clear which account you’re looking at and prevents costly mistakes like sending Client A’s campaign to Client B’s list.

2. Use Klaviyo Portfolio for Data Analysis

Don’t waste time logging into each account separately to pull reports. Use Portfolio’s unified dashboard to:

• Compare performance across accounts
• Identify trends and patterns
• Spot underperforming accounts that need attention
• Generate cross-account reports for stakeholders

3. Create Template Libraries

Build a library of proven templates, flows, and segments that you can quickly deploy to new accounts:

• Welcome series flows
• Abandoned cart flows
• Browse abandonment flows
• Post-purchase flows
• Email templates for common campaigns
• Segment templates for audience targeting

With Portfolio’s cloning feature, you can deploy these in minutes instead of rebuilding from scratch.

4. Implement Security Best Practices

When you’re managing multiple client accounts, security is critical:

• Use a strong, unique password for your Klaviyo login
• Enable two-factor authentication (2FA) for an extra layer of security
• Limit team access to only the accounts each person needs
• Regularly audit user permissions to ensure ex-employees don’t still have access
• Use role-based permissions to prevent accidental changes

5. Schedule Regular Account Audits

Set a recurring calendar reminder to audit each account:

• Check for deliverability issues
• Review list health and engagement rates
• Identify and suppress inactive subscribers
• Update integrations and API connections
• Review automation flows for errors
• Check billing and usage limits

6. Keep Client Data Separate

This should go without saying, but never mix client data:

• Don’t copy contacts from one account to another
• Don’t share customer lists between clients
• Maintain strict data privacy and GDPR compliance
• Use separate integrations for each account

The Hidden Challenge: Security and Account Isolation

Here’s something most agencies don’t think about until it’s too late: account isolation and security.

When you’re managing multiple Klaviyo accounts from the same computer, you’re creating potential security risks:

Browser Fingerprinting and Account Linking

Klaviyo (and most SaaS platforms) use browser fingerprinting to detect suspicious activity. Your browser leaves a unique “fingerprint” based on:

• Your IP address
• Browser type and version
• Operating system
• Screen resolution
• Installed fonts
• Timezone and language settings
• Hardware specifications

When you access multiple Klaviyo accounts from the same browser, Klaviyo can see that all these accounts are being managed by the same person, from the same location, on the same device.

For most legitimate use cases, this isn’t a problem. But it can create issues if:

• You’re managing competitor brands (Klaviyo might flag this as suspicious)
• You’re accessing accounts from different geographic regions
• You’re managing a very large number of accounts
• You need to maintain strict client confidentiality

The Professional Solution: Antidetect Browsers

For agencies managing sensitive client accounts or a large number of Klaviyo accounts, professional multi-account management tools like Multilogin provide an extra layer of security and isolation.

An antidetect browser creates completely isolated browser environments for each account, meaning:

• Each Klaviyo account appears to be accessed from a different device
• Each account has its own unique browser fingerprint
• Each account can have its own IP address (via residential proxies)
• There’s zero risk of accidental data leakage between accounts through cookie isolation
• You can run multiple accounts simultaneously without switching

This is especially important for agencies that:

• Manage competitor brands
• Need to maintain strict client confidentiality
• Access accounts from multiple geographic regions
• Manage dozens or hundreds of accounts

This level of secure browsing is essential for professional account management at scale.

Multiple Klaviyo Accounts vs. One Master Account: Which is Right for You?

This is a common question: should you create separate Klaviyo accounts for each brand/client, or try to manage everything in one master account with segmentation?

Use Separate Accounts When:

• You’re an agency managing client accounts (you need separate billing and data isolation)
• You’re managing completely different brands with different audiences
• You need separate integrations (different Shopify stores, different payment processors)
• You want to maintain strict data separation for privacy/compliance
• You need different team members to have access to different accounts

Use One Master Account When:

• You’re managing sub-brands under one parent company
• All brands share the same customer base
• You want unified reporting and analytics
• You’re okay with complex segmentation to separate audiences
• You want to simplify billing

For most agencies and multi-brand businesses, separate accounts are the better choice. The benefits of data isolation, separate billing, and client confidentiality far outweigh the convenience of a single account.

How to Handle Billing for Multiple Klaviyo Accounts

Billing can get complicated when you’re managing multiple Klaviyo accounts. Here’s how to handle it:

For Agencies Managing Client Accounts

Option 1: Client Pays Directly

The client creates their own Klaviyo account and adds you as a user. They handle billing directly with Klaviyo. This is the cleanest approach but requires the client to be comfortable with the platform.

Option 2: Agency Pays, Bills Client

You create the Klaviyo account under your agency’s billing, then invoice the client for the Klaviyo costs plus your management fee. This gives you more control but requires careful accounting.

Option 3: Use Klaviyo Portfolio

With Portfolio, you can centralize billing across multiple accounts, making it easier to track costs and manage payments.

For Multi-Brand Businesses

Use Klaviyo Portfolio to centralize billing for all your brand accounts. This gives you:

• One invoice for all accounts
• Centralized payment method
• Easy cost allocation across brands
• Volume discounts based on total usage

Advanced Account Isolation for Agencies

If you’re managing multiple Klaviyo accounts for competing brands or need enterprise-level security, consider these advanced strategies:

Using Virtual Browser Profiles

Tools like Multilogin allow you to create completely isolated virtual browser environments. Each profile has:

• Its own unique fingerprint
• Separate cookies and session data
• Individual IP addresses through proxies
• Complete isolation from other profiles

This prevents any possibility of account linking or data leakage between clients.

Implementing Team Access Controls

For larger agencies, implement strict access controls:

• Create separate team member accounts for each client
• Use role-based permissions to limit what each person can access
• Regularly audit who has access to which accounts
• Remove access immediately when team members leave
• Use 2FA for all team member accounts

Geographic Considerations

If you’re managing Klaviyo accounts for clients in different countries:

• Consider using proxies that match the client’s location
• This prevents triggering security alerts for unusual login locations
• Use residential proxies that appear as real home internet connections
• Maintain consistent login patterns for each account