We are looking to have a new set of 3-5 responsive email templates built out in Marketo and are seeking a vendor to do this for us. Please let me know if you've had a positive experience with anyone in particular or are a firm that provides this service.
I started using Knak email templates for our responsive templates. The Marketo code was even difficult for our front end guys to read and edit to optimize on all devices. Using the Knak templates it is very easy to edit the code and customize for our needs. knak.
Aside from Knak (knak.io ), which is a good solution :
On Launchpoint website you can find the Marketo partners that provide solutions for creating email templates faster.
At Grazitti (Marketo LaunchPoint Partner), we've helped hundreds of Marketo customers with responsive email template, landing pages and other Marketo assets.
Our expert designers and developers build the responsive assets according your branding guidelines and completely tokenize all of these assets so that your team does not have to go into any of the assets themselves to create and edit.
Please refer to Marketo Templates | Import email, landing page or program templates directly to your Marketo subscri... for some of our work. Please feel free to reach out to us at firstname.lastname@example.org . I'd love to talk to you more about requirement in detail.
I used Email Monks. They're fast and reasonably priced - they can add in Marketo editable tags and they deliver a litmus report with their code so that you can see how it renders in every browser.