We help you get the most out of Email Design Studio.
Eddy is infrastructure, not an agency. We build the design system, component library, and foundations your team needs to actually use the EDS license you're paying for. Already on EDS with a legacy template library? Migration runs inside the same engagement — diffed and swapped without downtime.
Design Studio is powerful.
Operationalizing it isn't.
You're paying for EDS. Your team wants to use it. But there's no design system, no component library, no patterns to compose against — just an empty editor and a list of campaigns that need to ship yesterday.
Your team is starting from scratch every time. No tokens, no components, no patterns. Every email is a custom build. At scale, you either slow down or make it up as you go — and the brand drifts either way.
We build the foundations directly in your CIO workspace: design tokens, a brand-locked component library, and base templates per journey type. New emails compose in minutes. Your team owns the system after handoff.
One mismatched Liquid tag. One broken layout. One subject line that doesn't match. It goes to your entire list, and there's no automated safety net. No rollback button.
Every email gets diffed at the source level and the rendered HTML level. Subjects and preheaders are verified programmatically. Swap is atomic: one click live, one click back.
Custom infrastructure.
Not a Notion board and vibes.
We built a Rails app that talks directly to Customer.io's public and internal APIs. Every stage of the migration is automated and reversible.
source diff compares template markup: Liquid logic, links, structure. rendered diff compares the actual HTML Customer.io sends, with personalization and layout wrappers applied. Subjects and preheaders are checked separately.
What we cover
- Design System Tokens, a brand-locked component library, and base templates per journey type. Built in your CIO workspace so your team owns it.
- New Builds Net-new campaigns, journeys, transactional emails, A/B variants. Composed against the system, not built from scratch.
- QA Pipeline Source diffs, rendered diffs, subject/preheader verification. Automated on every send.
- Migration Already on EDS with legacy templates? We migrate them onto the same system inside your engagement. No separate project.
- Ongoing Ops AI-first managed production. Unlimited requests, 24-hour turnaround, system evolution, render testing. Shared Slack channel.
We're not for everyone
This is a niche service. If you're in the right situation, we can move fast. If not, we'll tell you on the call.
- You're on Customer.io
- You've bought Design Studio and want to actually use it
- You need a design system, components, and patterns — not 80 one-off templates
- You have legacy templates to migrate (optional, included if needed)
- You want someone who's already shipped this, not figuring it out on your dime
- You're not on Customer.io
- You need a full-service marketing agency
- You want strategy, copywriting, or creative direction
- You're looking for the cheapest option
- You need someone to manage platforms other than CIO
From people who've worked with us
Fixed scope. No hourly billing.
- Workspace + brand audit
- Design tokens + component library
- Base templates per journey type
- Legacy template migration (if applicable)
- Training + handoff
- Unlimited requests, 24-hour turnaround
- AI-drafted variants, human-reviewed
- Automated diff + render validation on every send
- Component library evolution
- Shared Slack channel
Who's behind this
