On-brand, every single time
Define your brand once. Every generation respects it.
Colors
Type
Aa
Inter · Söhne
Voice
Set it once - every email Mailable designs stays on-brand.
One source of truth
Colors, fonts, logo, voice, and components live in one place and apply everywhere.
- Colors, type, logo, and voice
- Reusable, branded components
- Applied to email, sequences, and pages
Lockable guardrails
Mark rules as required so neither a teammate nor an agent can ship something off-brand.
- Required brand rules
- Off-brand output blocked at the source
- Consistency by default
Voice, not just visuals
Capture tone of voice so the writing sounds like you, not like generic AI.
- Tone and writing guidelines
- Consistent voice across sends
- Editable as your brand evolves
Syncs with the email and marketing tools you already use
How brand kit works
- 1
Define the brand
Add colors, fonts, logo, tone of voice, and any reusable components.
- 2
Generate within it
Every email and page is produced inside your brand’s guardrails.
- 3
Lock the rules
Mark brand rules as required so off-brand output is blocked, not just discouraged.
- 4
Scale with confidence
Whole teams and agents produce consistent email without a brand police.
See it in context
The drifting team
Before
Every teammate’s emails look slightly different and the brand slowly erodes.
With Mailable
Everyone designs inside the same brand kit, so every send looks unmistakably like you.
The off-brand agent
Before
An LLM agent generates an email with the wrong colors and a tone that isn’t yours.
With Mailable
The brand kit constrains the agent’s output, and locked rules block anything off-brand.
What teams use it for
Multi-author teams
Keep every contributor on-brand without a manual review gate.
Agent guardrails
Constrain API and agent output to your brand automatically.
Rebrands & refreshes
Update the kit once and bring future sends in line instantly.
The numbers behind great email
You don't have to take our word for it. Here's what the email-marketing benchmarks say.
63%
higher open rates for welcome emails than regular sends - first impressions matter most.
760%
more revenue from segmented, personalized campaigns versus one-size-fits-all blasts.
4.6B
email users worldwide by 2026 - still the most universal way to reach a customer.
Most teams ship more email, on-brand, in a fraction of the time.
Mailable estimate, based on typical email programs: hours saved per campaign, higher engagement from on-brand design, and revenue recovered by the flows you finally have time to ship. Your mileage depends on volume and what you automate first.
What great email looks like here
The brands that win this space treat email as design - and the benchmarks back it up.
Agencies
Agencies · client email
Agencies live or die on turnaround. Per-client brand kits plus vibe design mean on-brand campaigns shipped same-day across an entire roster - without growing the design team or letting brands drift.
hours
saved per campaign
$36
ROI per $1 clients see
100%
on-brand, every client
The strongest results come from scoped use cases with connected data and clear KPIs, and from keeping humans in the loop on the hard cases. That is exactly the model Mailable is built around.
100%
of sends pass your brand rules
Every email looks and sounds like you - whether a human or an agent made it.
Explore more of Mailable
AI email design
Describe it. Mailable designs it. It renders everywhere.
Automated sequences
Describe a flow once. Mailable designs every step.
Landing pages & funnels
Your funnel needs pages. Opt-ins, sales pages, thank-you pages, Mailable makes them easy.
Analytics & A/B
Opens, clicks, conversions - and AI that tests variants for you.
Languages & locales
Design once. Ship it in every language your audience speaks.
Triggers & webhooks
Signup, purchase, inactivity, a cron, or a webhook, in; the right email, out.
Use your own tools
Push to Mailchimp, Klaviyo, or a newsletter like Beehiiv, or export clean HTML.
Describe it. Ship beautiful email.
Start free, or talk to us about designing email at scale through the editor and the headless API.