Best Custom Email Templates Development Companies

Choosing the Right Partner for Custom Email Templates Development

There’s a world of difference between a decent-looking email and one that actually performs. Businesses and agencies that have moved beyond DIY tools and cookie-cutter templates understand this. That’s where custom email templates development comes into play—offering tailored design, bulletproof code, and consistent rendering across email clients.

At EmailCraft.com, we’ve worked on hundreds of email templates over the years—for marketing campaigns, transactional flows, onboarding sequences, product launches, you name it. And we’ve learned that not all email development services are built the same. This article isn’t just a roundup—it’s an analysis based on what truly matters when it comes to professional email template development.

What Is Custom Email Template Development?

In short, it’s building HTML email templates from scratch—or based on design files (Figma, XD, PSD)—with pixel-perfect precision and strict adherence to the quirks of different email clients. Unlike drag-and-drop editors or “one-size-fits-all” template marketplaces, custom development ensures that every detail works exactly the way it should.

It’s not just about looks. It’s about functionality: mobile responsiveness, accessibility, dark mode compatibility, clean code, proper fallback fonts, optimized image handling, and the ability to pass even the most stubborn spam filters.

Why Not Just Use an Email Builder?

Good question. Builders like Mailchimp, Klaviyo, or Stripo have made it easier than ever to throw together a decent-looking email. But for many teams, that’s just not enough:

• Brand consistency: Custom-coded templates offer full control over branding elements, spacing, font rendering, and custom visuals.
• Complex layouts: Builders struggle with unconventional designs or interactive elements.
• Client-specific rendering: Outlook, Gmail, Apple Mail—they all behave differently. Custom code accounts for this.
• Performance: Inline styles, bulletproof buttons, retina-ready images, fallback structures—all optimized manually.
• Modularity: Businesses often want modular templates that can be reused and reassembled dynamically.

In other words, if the email is important—if it’s transactional, revenue-generating, or brand-defining—you want a development partner who gets the details right.

What Businesses Are Looking For in an Email Development Partner

From our experience and interviews with marketing and design teams, here are the usual non-negotiables:

• Cross-client compatibility testing (Email on Acid, Litmus, or in-house)
• Clean, commented, and reusable code
• Fast turnaround without sacrificing quality
• Design-to-code capability (PSD, Figma, XD, etc.)
• Experience with ESPs (Hubspot, Salesforce, Klaviyo, Braze, etc.)
• Support for dark mode and accessibility
• Clear QA processes and responsive communication

Most teams want to hand off the design and not worry about rendering bugs or campaign failures. That’s what separates a true development partner from a freelance coder or a template provider.

How We Chose the Companies in This Article

When compiling this list, we didn’t just go by star ratings or the number of completed projects. We looked at:

• Actual client feedback on communication, delivery, and post-launch support
• Portfolio samples and code quality (where available)
• Tech stack and tools used for testing and validation
• Ability to handle complex or dynamic layouts
• Turnaround times and pricing transparency

The companies listed below have consistently shown they can handle real-world production needs, whether it’s a marketing campaign or a robust transactional system.

If you’re serious about custom email templates development, these are the partners worth exploring.

EmailCraft

Overview:
EmailCraft specializes in transforming PSD designs into high-quality, responsive HTML email templates. With a commitment to impeccable coding standards and swift delivery, they cater to businesses seeking efficient email marketing solutions.

Key Features:

• Rapid Turnaround: Offers a 1-business-day delivery guarantee for email template coding projects.
• Responsive Design: Ensures templates are mobile-friendly and render correctly across various devices.
• Comprehensive Testing: Conducts manual testing on 37 email clients and 12 real mobile devices to ensure compatibility.
• Design Consultations: Provides expert advice on email design to enhance campaign effectiveness.
• Integration Support: Templates are compatible with major email marketing platforms like Mailchimp, HubSpot, and Salesforce.

Client Testimonials:

• “Great experience! Thank you so much for doing such an outstanding job! The end result is so much more than I expected…” – Blaine Robison, Dagrander.com
• “EmailCraft has been my life-savior for a couple of years now. They are always on time and deliver some really cool coding.” – Jessica

Pricing:
Email template coding services start at $199.

GetDevDone – Email Templates Development

Overview:
GetDevDone offers professional PSD to HTML email template conversion services, emphasizing precision, speed, and compatibility. With over 16 years of experience, they serve a diverse clientele, including agencies and large enterprises.

Key Features:

• Fast Delivery: Average turnaround time is 7 hours per template, with the capability to deliver within 1 hour using parallel development methods.
• Extensive Testing: Templates are tested on 70+ email clients and 12 real devices to ensure flawless rendering.
• Dedicated Teams: Offers the option to work with the same development team for consistency across projects.
• Transparent Communication: Supports various communication channels, including Skype, Slack, Trello, and Jira.
• Experience: Over 18 years in email template development, delivering thousands of templates across industries.

Special Offers:

• Up to 50% discount when ordering multiple templates.

Crafted Email

Overview:
Crafted Email is a custom email development agency specializing in designing and coding responsive email marketing newsletter templates. With over 17 years of experience, they cater to a wide range of industries, including eCommerce, media, and publishing.

Key Features:

• Responsive Templates: Ensures compatibility across all leading marketing tools and email clients.
• Free Email Template: Offers a free email template to new clients to kickstart their campaigns.
• High-Volume Capability: Equipped to handle agencies requiring 10+ HTML email templates per week.
• Expert Team: NYC-based project management team with 24×7 support and a dedicated QA team.
• Notable Clients: Includes Neutrogena, Johnson & Johnson, and Janssen.

Client Testimonials:

• “The team always managed to go above and beyond what we requested.” – Campaign Manager, Nonprofit Organization
• “Everything has been honestly great so far. We really appreciate all of the support.” – Tracy Swenson, Storm Brain

MailBakery

Overview:
MailBakery specializes in designing and coding custom email marketing newsletter templates. They offer responsive designs tested across multiple devices and email clients, ensuring optimal performance.

Key Features:

• Custom Design & Coding: Creates email templates from scratch or converts existing designs (PSD, Sketch, AI, PDF) to HTML.
• Responsive Design: Templates are mobile-friendly and tested on 40 email clients and devices.
• Integration Support: Provides integration with popular email marketing platforms like Mailchimp and Campaign Monitor.
• White-Label Services: Offers solutions for digital agencies, including dedicated teams and NDA agreements.
• Refund Policy: No-questions-asked refund policy to ensure client satisfaction.

Client Base:
Trusted by over 4,000 companies of various sizes and industries.

Everlytic

Overview:
Everlytic offers comprehensive email template development services as part of its digital marketing automation platform. They focus on creating responsive templates compatible with their drag-and-drop builder and various email marketing needs.

Key Features:

• Responsive Templates: Develops fully responsive email templates for optimal viewing across devices.
• Design Adaptation: Adapts existing designs into Everlytic’s drag-and-drop templates.
• HTML & PSD Conversion: Converts Photoshop files and HTML into Everlytic-compatible templates.
• Integrated Platform: Templates are designed to work seamlessly within Everlytic’s marketing automation tools.

Additional Services:
Offers email marketing, SMS marketing, transactional messaging, automation workflows, and API integration.

Byte Innovatix

Overview:
Byte Innovatix provides tailored email template development services aimed at enhancing email communication strategies. They focus on creating responsive, engaging, and brand-aligned templates to boost conversions.

Key Features:

• Promotional Templates: Designs visually appealing templates to showcase offers, new launches, or updates.
• Responsive Design: Ensures templates are optimized for all devices and platforms.
• Brand Alignment: Customizes templates to align with the client’s brand identity.
• Tool Proficiency: Utilizes tools like Figma, HTML, CSS, Adobe XD, and integrates with platforms like Mailchimp.

Additional Services:
Offers UI/UX design, mobile app development, web development, ERP and CRM solutions, and digital marketing services.

Pixel2HTML

Overview:
Pixel2HTML specializes in converting custom email template designs into code compatible with top email sending platforms. They focus on delivering responsive and well-tested email templates.

Key Features:

• Custom Coding: Transforms unique email designs into functional HTML templates.
• Platform Compatibility: Ensures templates are compatible with major email marketing platforms.
• Responsive Design: Delivers templates optimized for various devices and screen sizes.
• Quality Assurance: Emphasizes testing and iteration to ensure high-quality outputs.

Additional Services:
Provides web and app development services, including dedicated development teams.

How to Decide What You Really Need

If you’re reading this, you’re likely already weighing the options. Do you need full custom development? Or can a modified builder template do the job?

Here’s a quick way to think about it:

• Go for custom email development if:
  You need bulletproof rendering, complex design layouts, modular code, or integration with a specific email platform. You care about how the email performs across devices and inboxes—not just how it looks in the builder preview.
• A builder-based approach may be fine if:
  You’re sending simple newsletters, don’t need advanced styling, and are okay with minor inconsistencies across clients.
• Or split the difference:
  Have your core templates custom-developed and then use a builder for content editing. This hybrid approach is becoming more common—and we support it fully at EmailCraft.

Beyond the Template: Think Lifecycle

A good email template isn’t a one-time asset—it’s the foundation of your lifecycle communication. Whether it’s onboarding flows, cart reminders, product announcements, or internal updates, your emails are your brand.

Investing in well-structured, flexible templates now can save hours (and headaches) later. You’ll spend less time fixing things, more time getting results.

Need Help Right Now?

If you already have a design and just want someone to build it properly—with responsive code, tested across all major clients, and delivered fast—you can order your custom email template here.

If you’re just starting out and want a clean, professional email signature instead, we’ve got that too: get your custom signature now.

No bloated code, no surprises, no markup weirdness in Outlook. Just reliable HTML, tested and ready to ship.