Aetherya

Thesia. Cognitive rigor at launch speed.

Thesia enables product, marketing, sales, and research teams to reason about audience response end-to-end. It brings cognitive evidence into launch decisions, allowing teams to identify failure modes and verify how work lands as conditions evolve.

How It Works

Unleash the power of personas.

Thesia brings cognitive simulation to a broader set of stakeholders, enabling cross-functional teams to reason collaboratively about audience response.

Unleash the power of personas.

Connect message to reception.

Thesia connects creative intent to cognitive appraisal and behavioral response, enabling teams to trace decisions across a launch and ensure the message holds as requirements evolve.

Connect message to reception.

Every step of the flow, one audience.

Pages, ads, posts, pitches, prices, open conversation. Each question runs through the same five-step flow on the same simulated audience, then is reported with the uncertainty attached.

Every step of the flow, one audience.
From decision to action

Five steps. No study design, no recruiting, no waiting.

Pricing

One engine. Plans buy capacity, not quality.

See full pricing
Free
€0

Try Thesia

Thesia ProMost popular
€20/month

For founders, marketers, and solo operators

Thesia Max
From €100/month

5–12× more usage than Pro

Thesia Studio
€1,000/month

For agencies and small teams

Request a demoSee your audience before your launch does.

Book a 30-minute call
Request a demo

Tell us the decision first — it is what lets us route you to the right team.

Looking to join us? View careers