Assembly

PREDICTIVE PUBLIC OPINION ENGINE

Assembly

Model where public opinion lands — before it does.

Rehearse reality.

Assembly builds an evidence-grounded market room around your product, then shows who leans in, who pushes back, and why.

SIMULATE

EVIDENCE-GROUNDED PERSONAS DEBATE YOUR PRODUCT

Hundreds of synthetic personas — grounded in publicly available evidence about how real customers behave — argue your product across multiple rounds. Not surveys, not focus groups. A live debate.

EVOLVE

OPINIONS SHIFT AND CONVERGE

Personas challenge each other, shift positions, and form emergent consensus. Watch opinions move in real time — or watch genuine disagreement hold firm.

PREDICT

MARKET REACTION REPORT OF THE OUTCOME

Get a Market Reaction Report — who ended up FOR, who stayed AGAINST, what argument was decisive, and where opinion is actually headed.

PROOF, NOT PROMISES

See the report before you run one.

Every simulation produces a Market Reaction Report — public sentiment, persuasion drivers, debate-shift markers, and a split-confidence verdict. Read a real run end-to-end before you submit a product brief.

  • Public sentimentbimodal · receptive ↔ resistant
  • Top persuasion driverscreenless ≠ another notification source
  • Top objection$79 vs. existing Apple Watch breathe nudges
  • Debate shift9 of 24 personas moved
  • Confidencesplit · further testing recommended

LIVE SIMULATION PREVIEW

Will urban commuters pay $79 for a screenless wellness wearable?

LIVE
S

Sarah

M

Marcus

E

Elena

J

James

P

Priya

T

Tom

4 for · 1 against · 1 neutral

Round 3

Market Reaction Report

2

agents shifted

Society leans receptive on the screenless angle but splits on the $79 / Apple Watch comparison.

Full breakdown below →

↑ This is what Assembly produces for every topic you run

WHY FOUNDERS USE ASSEMBLY

What founders learn.

One simulation. Five questions that usually cost months of interviews and ad spend to answer.

Who is receptive

Which audience segments lean in, and what story actually lands for them.

Who resists

Which segments push back, and whether the resistance is principled or solvable.

What objections matter

The objections that compound across the room — and the ones that quietly fade.

What proof changes minds

Which proof points (price, founder story, demo, social signal) actually move ballots.

What positioning breaks

The framings that crater — the ones not even your most receptive audience defends.

RUN YOUR OWN

Submit a product. See where the market pushes back.

Describe your product below. Assembly builds a fresh evidence-grounded room of synthetic personas, runs the simulation, and returns your Market Reaction Report.

Submit a product brief

Assembly dynamically builds a synthetic society from live evidence for this brief — you don't pick the personas or cohorts, the system finds them. The simulated society then reacts and debates, and we report who's receptive, who resists, why, and what to test next.

Mode:Live simulation
Optional advanced fields
Synthetic society: 24 personas · Estimated time: ~12–20 minutes
How to read this report

Assembly simulates a run-scoped synthetic society using live market evidence. It is not a real customer interview or revenue prediction, but it helps surface likely objections, proof needs, and audience reactions before launch.

  • Synthetic simulation, not a real customer interview
  • Not a real-world forecast or revenue prediction
  • Run-scoped — not representative of the whole market
  • Simulated intent is not actual purchase behavior
  • No launch / kill verdict — the report surfaces objections, proof needs, and audience reactions
  • Evidence-backed, but still needs real-world validation

THE DELIVERABLE

MARKET REACTION REPORT

After every simulation, Assembly produces a Market Reaction Report — who shifted, what argument was decisive, and where consensus is actually headed. Below is a real run, abridged.

Will urban commuters pay $79 for a screenless wellness wearable?

Sample run

AGENT RELATIONSHIP

GRAPH

24 agents · live particle flow

FOR AGAINST NEUTRAL SHIFTED
ER

Ellis

WB

Winslow

WS

Winslow

PD

Phoenix

PH

Phoenix

QE

Quinn

CD

Casey

XF

Xael

JF

Jordan

YJ

Yarrow

MA

Marlowe

MT

Maya

SS

Sage

PF

Phoenix

PG

Parker

JE

Jordan

MG

Marlowe

LC

Lennon

AM

Avery

UH

Uma

SL

Sage

PL

Parker

KS

Kai

MF

Marlowe

Graph guide

Each node is one synthetic agent. Solid edges are ballots that moved during discussion; dotted edges are stable relationships.

What the synthetic agents said

Round-by-round transcript across 4 groups. Stance pills collapse each agent's position to Receptive / Uncertain / Resistant; ▲▼ shows shift from their pre-discussion stance.

Group 16 agentsGroup 26 agentsGroup 36 agentsGroup 46 agents
Personas in this group (6) — click to expand private ballots

Trust seeker, Use-case focused buyer, Apollo Neuro user, Muse S user, Performance-focused buyer, Convenience-focused buyer.

Round 1· 6Round 2· 6Round 3· 6Round 4· 6

Round 1 · Public opening· 6 turns

Receptive 1 · Uncertain 4 · Resistant 1

Avery M.UNCERTAIN
Muse S user

Honestly, my Muse S already gives me solid feedback during sit-down sessions, so the appeal of a screenless wearable for me would be the passive, in-the-moment angle — something that nudges me mid-meeting without me having to strap on a headband or open an app. That said, a wristband that vibrates at me through the day is a lot to sit with, even if it doesn't record audio. At $79 it's not crazy compared to what I paid for the Muse, but I'd need a clearer sense of how it detects stress in the first place before I'd seriously consider it.

Lennon C.UNCERTAIN0.13
Use case focused buyer

Honestly, as someone who's been around clinical settings, I get the appeal of something passive that doesn't make me pull out my phone or stare at a watch mid-shift. But a buzzing wristband I'd wear all day gives me pause — I read that it doesn't record audio, fine, but what is the sensor actually doing then? At $79 I'm not opposed, I just want to understand what it's sensing before I'd strap it on during a meeting or a patient interaction.

Phoenix F.UNCERTAIN
Trust seeker

Honestly, a wristband marketed as 'wellness' gives me pause right out of the gate. I get that it doesn't record audio, but I'd want a really clear story on what signal is actually being read and where any of that data lives. I currently lean on the Apple Watch breathe nudges and an occasional Headspace session, and those feel low-stakes because I know what they are. At $79, I'd need to see real evidence it does something my watch can't before I'd consider switching.

Sage L.RESISTANT0.38
Apollo Neuro user

Since the brief says the wearable captures body-signal patterns during the day, I'd want to know exactly what makes this better than my Apollo Neuro band, which already does a screenless vibration cycle for stress. The $79 price point is fine in isolation, but the comparison story isn't there yet — I'd want to see a side-by-side against Apollo before I'd switch.

Live distribution · Round 4

  • Receptive6
  • Uncertain11
  • Resistant7

Final ballot

  • Receptive3
  • Uncertain20
  • Resistant1
ALL ROUNDS

Round 1 → Round 4 shows the society migrating from a 4-1-1 receptive opening toward a heavy uncertain middle as the price-vs-mechanism question hardened.


Outcome stats

9

agents shifted

15

agents held

38% opinion shift rate

Every simulation produces this Market Reaction Report automatically.