Know how your
audience will react
before you publish.
Atharias is an API that simulates real audience reactions to your content — headlines, ads, emails, landing pages — so you ship the version that converts, not the version you guessed.
Three API calls from knowing.
Submit your content
Send any content via REST API — headline, email subject line, ad copy, landing page section, or full article. JSON in, reactions out.
POST /v1/simulate{ "content": "Your summer sale...", "persona": "millennial_dm", "metrics": ["scroll","share","click"]}
Atharias runs your audience
Our models simulate 140+ audience persona archetypes, scoring emotional resonance, attention decay, click impulse, and scroll depth.
{ "scroll_depth": 0.87, "share_intent": "HIGH", "click_impulse": 0.74, "attention_span": "2.4s"}
Ship the winning version
Compare variants instantly. A/B test in the API layer before spending a dollar on distribution. Ship what your audience already responded to.
{ "winner": "variant_b", "lift_estimate": "+23%", "confidence": 0.91}
Ship a headline, cross fingers, wait 2 weeks for data, find out CTR was 1.1%. Start over.
Simulate 5 variants in 98ms. Ship the winner. See +23% lift in your first week.
Every channel.
Every message.
Atharias works wherever copy meets audience. B2C marketing teams use it across the entire content stack.
Subject lines that open
Test 10 subject line variants against your subscriber persona before scheduling. Know your open rate before it matters.
Ad creative that converts
Simulate scroll-stop probability and click impulse for each ad before you spend $1 on distribution. Cut creative waste by half.
Hero copy that sells
Atharias scores headline resonance, CTA clarity, and scroll depth for your landing page variants — before you run a single visitor.
Titles that rank and click
Model SERP curiosity gaps and virality scores for blog titles and meta descriptions. Ship the version your audience searches for.
Alerts that get opened
Simulate notification fatigue risk and urgency calibration for each push variant. Stop the uninstall spiral before it starts.
Announcements that land
Model how your launch copy lands across early adopter, mainstream, and skeptic personas. Write once. Resonate with all of them.
140+ audience personas,
out of the box.
From skeptical Gen Z first-time buyers to deal-hunting suburban parents. Each persona has calibrated attention spans, emotional triggers, and scroll behavior derived from behavioral research.
Average simulation response. Fast enough to run inside your CMS before content is published.
“We used to A/B test our way into insights that took weeks. With Atharias we simulate 20 variants in under 2 seconds and ship the winner. It's a cheat code.”
“Our email open rates are up 31% since we started simulating subject lines before sending. Our team will never write a subject line on instinct again.”
“The persona depth is incredible. We model our exact audience archetype — skeptical millennial, first-time buyer, price-sensitive parent — and the reactions are eerily accurate.”
Simple pricing. No surprises.
All plans include a 14-day free trial. No credit card required to start.
Developer
For individual marketers and founders running content experiments on their own stack.
- ✓5,000 simulations / month
- ✓20 persona archetypes
- ✓Core reaction metrics
- ✓REST API access
- ✓JSON + CSV export
- ✓Community support
Growth
For growth teams shipping content at scale across paid, organic, and lifecycle channels.
- ✓50,000 simulations / month
- ✓140+ persona archetypes
- ✓Full reaction signal suite
- ✓Variant comparison engine
- ✓Webhook delivery
- ✓Email + chat support
- ✓Usage dashboard
- ✓Team seats (up to 5)
Enterprise
For enterprise marketing orgs with volume, compliance, and integration requirements.
- ✓Unlimited simulations
- ✓Custom persona training
- ✓Dedicated model endpoints
- ✓SSO & SCIM provisioning
- ✓SLA guarantees (99.9%)
- ✓Dedicated CSM
- ✓On-prem / VPC options
- ✓Priority roadmap access
All plans include 14-day free trial · No card required · Enterprise SLA available
Stop guessing. Start knowing.
500 free simulations. No credit card. Your first audience report in under two minutes.