Marketers should market,
not code emails.

stensul enables non-technical marketers to build perfect, mobile responsive emails that are 100% compliant with your brand, design, and legal guidelines.


Our platform enables non-technical marketers to create fully responsive, on-brand emails in minutes—without a designer, developer or agency. We don't send emails, we sit in front of (and integrate with) your current ESP.

stensul is built for:

Core Marketers

Have a big email goal to hit at HQ? Grow your marketing program without increasing headcount or cost

I'm a corporate marketer

Distributed Marketers/Users

Allow distributed marketers and other users to create their own emails (with guide rails and approvals in place)

I'm on a distributed team

Brand, Compliance and Quality Assurance Controls

  • Enforce brand and design guidelines
  • Compliance and regulatory governance
  • Prevent “oops” moments by removing the need for continuous rendering tests and broken/missing links or unoptimized images
  • Automatically updated code for ISP rendering changes

Organizational Optimization

  • Enable marketers to use platform customized to their language, region, role and business unit
  • Gain insights into what your organization is creating in a centralized place and share best practices
  • Make workflows a breeze with team collaboration and approvals
  • Significantly reduce costs

Fully integrated with major ESPs


Efficient Use of Resources

  • Avoid pulling in designers for every creative asset change or request
  • Give developers their time back by simplifying complex tasks like feeds and personalization tags
  • A/B test and make last minute changes in minutes
  • Dramatically reduce overall production time


  • Compatible with all major ESPs
  • Plug into image and content asset managers
  • See more

Premier Service and Support

  • Dedicated enterprise support team
  • Strategic Business Reviews to track progress and draw insights

The Results

Before stensul

  • Work time: 5 – 10 hours
  • Turnaround time: 2 – 6 weeks
  • Significant pain and cost

With stensul

  • Work time: 1 hour
  • Turnaround time: 1 day
  • 6-10x output and pain-free

"Instead of spending hours going through HTML, (with stensul) I can actually focus on creating more emails and doing more projects."

Winifred L.

B2B Marketing

"[Before stensul] What was really taking a lot of my time was the coding. It was a very time-consuming and manual process, and there was a lack of responsive design within the templates that we were building. stensul changed all that."

Julie B.

Growth Marketing

"Very user friendly. Helps create emails much easier and faster. We were able to reduce email production time by a significant amount!"

Madeline W.

Marketing Operations

"The interface is simple, clean, easy to navigate and quick considering the functions it offers. PS - it generates CODE in seconds. That's pretty awesome for us non-coders. If you are looking for a simple email building and coding solution for your everyday needs, this is a worthwhile product."

Nicole F.

Growth Marketing

"stensul brought efficiency and ease-of-use to Catalent’s email production process."

Jorge R.

Manager of Sales and Marketing Technology

Ready to say goodbye to hand coding emails?

Give us some information and we'll schedule your custom product demo.

Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.