Email design that looks great and email design that converts are often different things. Here's what the conversion lens looks like.

Email Design Agencies: How to Evaluate for Conversion

Email design is one of the most underinvested areas in B2B SaaS marketing despite being one of the highest-ROI channels. Most teams use default templates with minimal design consideration. A small investment in email design produces measurable click-through improvements.

What Makes Email Design Convert in B2B

Mobile-first layout. Over 60% of B2B emails are opened on mobile. If your email is designed for desktop and awkward on mobile, you've lost the majority of opens immediately.

Single CTA per email. The most common email design mistake is including 4-6 different links and CTAs. Every additional CTA reduces the click rate on the primary CTA. One email, one action, one link.

Preheader text as part of the design. The preheader (the text that appears next to the subject line in the inbox) is preview copy that most email designers ignore. It's the second subject line. Design it.

Content hierarchy that survives image blocking. Many email clients block images by default. Your email should communicate its value and CTA clearly with images disabled. ALT text on all images, button styled as HTML (not an image).

Personalization-ready templates. Personalization tokens should be designed into the template so they look natural, not like placeholder text with brackets around it.

How to Evaluate Email Design Services

Ask for examples of emails with their click-through rate data. Ask: "What was the CTR on your most successful client email design?" This question separates services that measure outcomes from those that just produce output.

Ask about their mobile preview testing process. Ask about their quality assurance checklist. Ask how they handle the space between design and template development (Mailchimp, HubSpot, Marketo all render slightly differently).

Standalone Agency vs. Design Pod

Email design agencies typically charge $500–$2,000 per email template. If you're sending a weekly newsletter plus two campaign sends, that's $6,000–$18,000/month just in template design — if each send requires a unique design.

The sustainable model is to develop a strong set of base templates (3-5), then produce content variations within those templates at low marginal cost. That's design ops: initial investment in templates, then rapid content-variant production.

See how Sako handles email creative →. See pricing for the model →.