Aetherya
Explore plans

One engine. Plans buy capacity, not quality.

The cognition model is identical on every plan, including the free one. What you buy is how much you can run, how many people can run it, and whose data the populations are built from.

Not sure which plan fits? Talk it through with our team.

Book a 30-minute call

Free

Try Thesia

€0

Free for everyone

 

100 Myrias reads + 1 full simulation a month*

reads over up to 500,000 synthetic people; the full simulation on a guided starter panel of 25–50 personas

Includes:

  • 100 Myrias instant reads a month
  • One full THYMOS simulation a month (guided)
  • Shared standard populations
  • Full result page for every study
  • The same cognition model as every paid plan
  • Cognitive audits, message tests, and audience reactions
Most popular

Thesia Pro

For founders, marketers, and solo operators

€18

Per month with annual subscription discount (€216 billed up front). €20 if billed monthly.

No commitment · Cancel anytime

2 full simulations a month*

on a panel of 200 personas at standard depth

Everything in Free, plus:

  • More usage
  • 2,000 Myrias instant reads a month
  • Your own creatives, URLs, and audiences
  • Standard populations with full targeting
  • Recurring simulations and cognitive audits
  • Aetherya Credits after the included capacity

Thesia Max

5–12× more usage than Pro

€90

Per month with annual subscription discount (€1,080 billed up front). €100 if billed monthly.

No commitment · Cancel anytime

5× Thesia Pro's monthly capacity

Capacity, not a run quota — panel size and depth set by each study

Everything in Thesia Pro, plus:

  • Choose 5× or 12× more usage than Pro
  • 10,000 Myrias instant reads a month
  • Higher concurrency for parallel studies
  • Additional workspaces to separate projects
  • Priority processing at busy times

The simulation count on Free and Thesia Pro is measured against a reference panel of 200 synthetic personas at standard depth. A bigger panel, multi-round deliberation, or a full cognitive audit uses proportionally more of your monthly capacity, and a smaller one uses less. Thesia Max, Thesia Studio and Pleroma are sold as capacity rather than as a run quota, because at that scale the panel, the depth and the cadence are set by the work rather than by a plan. Aetherya shows exactly what a study will use before you launch it, so you are never guessing.

How usage is measured

Every plan lets you define your own audiences. Free through Studio sample them from Aetherya's standard synthetic populations. Pleroma builds populations from your own first-party data, and calibrates creative predictions against the ad outcomes you supply.

About Pleroma
Managed delivery

Prefer us to run the study?

Thesia plans are self-serve workspaces. If you want Aetherya to design, run, and debrief the work, start with a scoped engagement.

Scoped engagement

Managed Sprint

From €4,500

We design, run, and debrief a bounded study. You receive an evidence pack with stated assumptions and uncertainty, not a guaranteed market outcome.

Request a sprint

Ongoing cadence

Continuous Decision Partnerships

From €2,500 / month

Ongoing simulation support for teams that need a decision cadence across launches, campaigns, and product bets.

Discuss a partnership