Dynamic Email Content Platform
Stop sending static content to dynamic people
Countdowns that keep ticking, prices that stay current, maps that point to their store, offers that fit where they are. All of it decided when the email is opened, not when it's sent.
No credit card. Works with your ESP.
One email, rendered for whoever opens it.
Pick a city or a device to see their version.
Rainy in Cupertino · 68°F
Warm up, 20% off kitchen
Apple · iPhone 17 Pro 256GB
Pickup: Available tomorrow at Cupertino
$999Save $100Was $1,099
Sent once. Correct at every open.
The email gets opened hours or days after you send it. The sale ended, the price changed, they moved cities. Alterable renders the image when they open, so it reflects the moment they’re actually looking.
Their name, their points, their last order
Names, loyalty balances and purchase history pulled into the artwork itself, one image per subscriber, generated at open. No pre-made variants to manage.
Where they are right now
Location resolves from the open, so the map points to the nearest store, the weather matches their sky, and the offer fits the region. No segments, no per-city versions.
A deadline that’s actually ticking
The countdown shows the real time left for every open. When it hits zero, a fallback block replaces the dead offer instead of embarrassing you.
What you can build
One image tag, endless variations
Each example below is a working recreation of an Alterable image. The highlighted fields are live, change one and watch it re-resolve, exactly as it would on open.
FREE CUSTOMIZATION
JohnFirst nameJMonogramType a name: the engraving, the monogram and the icon all re-resolve.
Their name, on the product itself
Engrave a first name, set the monogram, swap the icon: the artwork is generated for each subscriber rather than picked from a handful of pre-made variants.
- First name
- Monogram
- Engraved icon
REWARDSUNLOCKED
$10
Reward amountCODE
4815162342
Coupon codeEXPIRATION
--
Expiry dateOpen the same campaign as someone else, both images in this example re-resolve together.
POTTERYHOUSE
JANE WHITFIELD
Full nameTHE LOCK REWARDS
VISASignature
Earn 10% back in rewards today
Apply for the Pottery House credit card today to earn rewards at Pottery House, East Elm, Richard Sonoma and more.
LEARN MORE
Every balance and code, unique
Pull the reward amount, coupon code and expiry straight from your loyalty platform, and resolve the same recipient across every image in the send. No CSV exports, no per-segment versions.
- Reward amount
- Coupon code
- Expiry date
- Full name
FREE SHIPPING ON ALL U.S. ORDERS $60+
MARINA
- MEN
- WOMEN
- KIDS
- HOME
- WORLD OF MARINA
- SALE
HURRY JANE!
SELECT 2 DAY SHIPPING BY 1PM ET ON 6/11
FOR GUARANTEED WEEKEND DELIVERY
OR SHOP IN STORES
LEFT
THIS OFFER HAS ENDED
WEEKEND SHIPPING IS NOW CLOSED
SHOP NEW ARRIVALS
OR FIND A STORE NEAR YOU
The clock is real. Open it late enough and the fallback block takes over. No resend needed.
A clock that knows when it’s over
The countdown renders at the moment of open, so the time left is always right, and once the deadline passes, the fallback block takes over instead of advertising a dead offer.
- Countdown timer
- Expiry fallback
EAST ELM
89°FLive weatherinPhiladelphiaLive location
It’s patio weather.
Shop the outdoor collection, 20% off
Local map© Mapbox © OpenStreetMapRittenhouse RowNearest showroom
The city above was picked from your browser’s time zone. Switch it and the weather, the offer, the showroom and the map all resolve again.
Their weather, their nearest store
Location resolves at open-time, so one image merchandises against the weather where they actually are and points them at the showroom they can actually reach. No segments, no per-city versions.
- Live weather
- Live location
- Nearest showroom
- Local map
JaneFirst name, your order is on its way!
Save this email, reopen it for tracking updates.
BY CARRIERIN
TRANSITOUT FOR
DELIVERYDELIVERED
Your order tracking number is:
3141592653589793Tracking number
Nothing is resent: the same image re-renders at each open. Sped up here so you can watch it.
Status that updates on every open
Order tracking, stock levels, scores, prices, anything you can expose to an API renders into the image each time it is opened, long after the campaign was sent.
- Live tracking
- Tracking number
- First name
Use Cases
Built for the moments that matter
Whatever the campaign, the content stays live.
Flash sales and launches
A live countdown in every open turns “ends soon” into a visible deadline.
Black Friday and seasonal peaks
Fixed-date timers and day-of imagery for the weeks when every send competes.
Winback and abandoned carts
Show current products, prices, and stock at open time, not send time.
Loyalty and milestones
Render each reader’s points balance, tier, or birthday offer right into the hero image.
Store visits and local events
A map to the nearest location, rendered from where the reader opens the email.
Giveaways and quick feedback
Scratch-and-win reveals and one-click polls that work inside the email itself.
3-Step Setup
Deploy real-time content that stays relevant long after you hit send
Define logic
Set your campaign rules in seconds. Choose between fixed-date promotions or evergreen flows, and configure fallback triggers for location, weather, or missing data.
Design content
Use the visual builder to layer dynamic data, like names, maps, or survey questions, onto your brand’s assets. Preview live variations instantly to ensure a perfect look for every recipient.
Embed snippet
Copy your platform-agnostic code snippet into your ESP (Klaviyo, Mailchimp, etc.). Our engine renders the content at open-time.
Compatible with every martech platform
Alterable works with all major martech providers and can be embedded in any system.
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Get started
Make the email you already sent stay accurate
Increase message engagement without changing your existing marketing software.
No credit card · Works with every major ESP