AI that writes, targets, and tests your email campaigns
SendStack is an email marketing platform that drafts your copy, predicts how a campaign will perform before you send it, and keeps optimizing after it goes out.
What is SendStack?
SendStack is an AI email marketing platform for marketers and marketing teams. It covers the full campaign workflow: writing copy, building the email, choosing the audience, scoring the campaign, testing variants, and tracking the revenue it drives.
The goal is simple: send fewer, better emails, with decisions based on data instead of guesswork.
Why email campaigns underperform
Copy written on guesswork
Subject lines and body copy are drafted by hand, with no clear signal about which phrasing your audience responds to.
Results only after you send
You find out how a campaign performs once it has already gone out, when it is too late to fix the subject line, timing, or segment.
Static lists and CSV imports
Manually managed lists drift out of date as subscribers buy, browse, and engage, so targeting falls behind real behavior.
Tests that never get finished
A/B tests need manual setup, monitoring, and someone to remember to pick a winner — so most campaigns go out untested.
How SendStack helps
Six modules that cover each stage of a campaign.
AI Copy Engine
Generates subject lines, preview text, and full body copy calibrated to your brand voice, and learns from your best-performing campaigns.
Predictive Campaign Scoring
Scores each campaign for open rate, click-through rate, unsubscribe risk, and spam probability before it goes out, with suggestions to improve it.
Behavioral Auto-Segmentation
Builds segments from purchase history, engagement, browsing, cart activity, and lifecycle stage — and updates them as subscribers act.
Automated A/B Testing
Tests subject lines, preview text, send times, layouts, and CTA copy, then picks the winner and rolls it out to the rest of your list.
Revenue Attribution & Analytics
Connects email engagement to purchases, signups, and upgrades, with revenue shown per campaign, segment, and automation flow.
Deliverability Management
IP warm-up, bounce and complaint monitoring, automatic list hygiene, and SPF, DKIM, and DMARC setup to keep emails out of spam.
How it works
- 1
Build the campaign
Lay out the email in the Visual Campaign Builder while the AI Copy Engine drafts subject lines, preview text, and body copy. Edit anything before it ships.
- 2
Choose the audience
Target behavioral segments that stay current on their own, instead of exporting and re-importing lists.
- 3
Check the score
Review the predicted performance and the specific elements — subject line, send time, segment — that are holding it back.
- 4
Send, test, and measure
Automated A/B testing rolls out the winning variant, and revenue attribution shows what each campaign actually drove.
Who it's for
E-commerce marketers
Product launches, cart abandonment flows, and post-purchase sequences, with revenue tied back to each email.
SaaS growth teams
Onboarding sequences that adapt to user behavior and win-back campaigns for users who drift away.
Newsletter creators
AI-written edition copy and send-time optimization for regular digests.
Marketing agencies
Multiple client brands from one dashboard, each with its own trained voice, segmentation rules, and reporting.
How the product is designed
Know before you send
Every campaign is scored before it leaves, so changes happen while they still matter.
You keep the final say
AI output is a starting point. Copy, layout, and segments stay fully editable in the builder.
Optimization runs in the background
Testing, segment updates, and list hygiene happen automatically, without manual follow-up.
Every send teaches the next
Opens, clicks, and conversions feed back into the copy engine and predictions for your audience.
Why SendStack
- Copywriting, prediction, segmentation, testing, and attribution in one platform instead of separate tools
- Pre-send scoring that points to the specific element to fix
- Segments driven by real subscriber behavior, not static lists
- Built-in deliverability tools: warm-up, bounce handling, list hygiene, and sender authentication
- Pricing based on subscriber count, with unlimited sends on every plan
Score your next campaign before it sends
Write it with the AI Copy Engine, target a behavioral segment, and let SendStack test and measure the rest.