Top Email Design Tools for Agencies That Work With Any Client ESP

Email design tools for agencies provide a dedicated creative layer where teams build and manage emails for multiple clients in one place. Agencies create and approve templates in this environment, while sending finished emails through each client’s preferred Email Service Provider (ESP).

A platform like Stripo makes this approach practical by allowing agencies to manage email production independently of their clients’ sending platforms. This is especially useful when one client uses Mailchimp, another uses Klaviyo, and a third uses a completely different ESP.

Instead of adapting the entire workflow to every client’s software, agencies can centralize design, maintain brand consistency, and simplify campaign production.

What Should Agencies Look for in Email Design Tools?

Choosing the right email template builder requires more than checking its drag-and-drop editor. Agencies need features that support multiple brands, teams, and client approval processes.

The most important criteria include:

• Separate client workspaces: Each brand should have its own projects, templates, and assets.
• Brand settings: Individual colors, fonts, logos, and other visual elements should be configurable for every client.
• Client approval: Comments, feedback statuses, and shareable preview links help organize revisions.
• Flexible ESP export: The tool should support direct integrations and HTML export for different sending platforms.
• White-label options: Agencies may need to remove third-party branding or provide clients with a branded experience.

These capabilities help agencies avoid repetitive work and maintain consistent quality across different accounts.

Best Email Design Tools for Agencies: Comparison

Here is a comparison of four platforms that can support agency email production.

The best choice depends on the agency’s workflow, client portfolio, and technical requirements. However, a centralized design platform is particularly valuable when clients use different sending systems.

1. Stripo: Email Design for Agencies Working With Different ESPs

Stripo works as a centralized design layer for agencies that manage multiple clients using different ESPs. It allows designers to create emails in one environment and export finished templates to more than 90 ESPs.

This means agencies can maintain one internal design workflow without requiring every client to use the same marketing platform.

Separate Projects and Brand Settings

Stripo allows agencies to organize client work through separate projects. Each project can have its own templates, assets, and brand-related settings.

For example, an agency working with a fashion retailer, a SaaS company, and a food brand can maintain three separate design environments.

Each client can have individual settings for:

• Brand colors and fonts.
• Logos and visual identity.
• Contact information.
• Reusable design elements.
• Other project-specific preferences.

This organization reduces the risk of mixing client assets and helps designers switch between brands without repeatedly configuring templates manually.

You can also organize project access around team responsibilities, making collaboration easier as an agency grows.

Synchronized Modules for Faster Updates

Agencies frequently reuse email elements such as headers, footers, promotional banners, and social media sections.

Stripo’s Synchronized Modules make these components easier to maintain. When a synchronized module is updated, the changes are reflected across the templates that use it.

For example, if a client changes their footer design or contact information, the designer can update the shared module once instead of manually editing every campaign template.

This saves time, reduces repetitive work, and helps maintain brand consistency across multiple emails.

Client Approval Through Comments and Preview Links

Agency email marketing requires regular communication with clients. Without a structured approval process, feedback can become scattered across emails, messaging apps, and screenshots.

Stripo offers commenting functionality that allows reviewers to leave feedback on specific email blocks. Comments can be managed using statuses, helping teams distinguish between outstanding and resolved requests.

Agencies can also share preview links so clients can review designs without exchanging screenshots through messengers.

A typical workflow looks like this:

1. The designer creates an email template.
2. The agency shares a preview link.
3. The client leaves comments on specific elements.
4. The designer makes the requested changes.
5. The team checks the final version before export.

This makes revisions more organized and reduces misunderstandings during approval.

Image credits: Kampus Production

Email Testing Across 98 Email Clients

A template can look perfect in an editor but display differently in Gmail, Outlook, or mobile email applications.

Stripo provides email testing through its Email on Acid integration, with testing across 98 email clients and environments.

This helps agencies identify potential rendering issues before sending campaigns.

Teams can check layout consistency, image display, button appearance, typography, and mobile responsiveness. Testing is particularly useful for agencies managing clients whose audiences use different devices and email applications.

Exporting Templates to Different ESPs

One of Stripo’s main advantages for agencies is its ability to export email designs to more than 90 ESPs.

For example, an agency can create a template centrally and export it to Mailchimp for one client and Klaviyo for another.

Direct integrations simplify the process for supported platforms. HTML export also provides flexibility when a client’s sending system lacks a native integration.

The same design can therefore serve as a starting point for different client environments without rebuilding the entire email from scratch.

Before sending, agencies should still check platform-specific settings, dynamic content, merge tags, and tracking parameters.

For teams managing multiple accounts, this approach makes email production more scalable and predictable.

Image credits: Nataliya Vaitkevich

2. Beefree: Collaborative Email Creation

Beefree focuses on visual email creation and collaboration. It offers agency-oriented workspace features, reusable content, and export options for teams working with different marketing platforms.

3. Chamaileon: Email Design and Team Collaboration

Chamaileon combines a visual email builder with collaborative production features. Its integrations and HTML export options make it useful for teams that need to transfer designs between different ESPs.

4. Dyspatch: Structured Email Production

Dyspatch focuses on reusable email components, content management, and structured collaboration. It is particularly relevant for larger teams that need more control over email production and review processes.

Why Mailchimp and Klaviyo Are Not Enough as Agency Design Tools

Mailchimp and Klaviyo are powerful ESPs, but their primary purpose is campaign distribution, automation, audience management, and analytics. Their built-in editors work well for businesses creating campaigns within their own accounts. However, agencies managing multiple clients often face fragmented workflows because every client may use a different platform, account structure, and set of editing capabilities. A dedicated design tool solves this problem by providing one centralized environment for creating, maintaining, and approving templates. The agency can then export each finished email to the client’s existing ESP without changing the client’s marketing infrastructure.

How to Choose the Best Email Tool for Agencies

Before selecting a platform, agencies should evaluate their actual production requirements.

Consider these questions:

• How many clients do you manage? Separate projects and brand settings become increasingly important as the portfolio grows.
• Do clients review designs themselves? Comments, preview links, and feedback statuses can shorten approval cycles.
• How many ESPs do your clients use? Flexible integrations and HTML export are essential for diverse client portfolios.
• Do you reuse email components? Synchronized modules can significantly reduce repetitive work.
• Do you need white-label functionality? Check whether the platform supports the level of branding and customization your agency requires.

It is also worth testing a real client workflow before choosing a subscription. Create a template, invite a reviewer, test the export process, and check the result in the client’s ESP.

Final Thoughts

The best email design tools for agencies should do more than create templates. They should help teams organize client projects, maintain brand consistency, collect feedback, test emails, and export designs to different sending platforms.

Stripo is a strong option for agencies working with multiple ESPs because it combines separate client projects, brand settings, synchronized modules, approval features, testing across 98 email clients, and export capabilities covering more than 90 ESPs.

Beefree, Chamaileon, and Dyspatch are also worth considering, depending on the team’s collaboration and production requirements.

Ultimately, a centralized design layer lets agencies standardize their creative workflow while letting each client keep the ESP that best fits their business.