Feeds from the biggest platforms

Know which ad wins,
before you

Up to 1,000 AI consumers react to your creatives in minutes.
Ship only the winner, without burning budget on Meta or Google to find out.

Try it for free. No credit card needed.

Every ad you ship is a
receipt you can't reprint.

Reach is commoditized. Targeting is commoditized. Creative quality is the last lever that still moves the needle and most teams pull it by burning cash on Meta to learn which one didn't.

The cost of a wrong creative isn't the spend. It's the two weeks of CAC the winner could have produced instead.

Sales lift attribution47%

of an ad's sales lift comes from the creative alone more than reach, targeting, recency and frequency combined.

Hit rate on launched ads3/4

launched ads underperform the winner. The other three exist only to teach you a lesson you paid for.

Day-1 → 9 · CTR+12%
D1D3D5D7D9
linenandco
Sponsored
Sponsored
Liked by amelia.b and 1,284 others
linenandcoRefresh your home with our 100% European linen — limited summer collection. ... more
2 hours ag
Daily spend · live$120
D1spend climbs as Meta hunts for clicksD9

Run the ad.
Run the audience.

Not a forecast. A simulated society inside the feed. Up to 1,000 consumers from your audience — each with a name, personality, daily routine, and memory. They tire of repeat ads. They share, comment, click, or flag as spam. You watch it unfold and read the reason behind every reaction — before a single cent leaves your account. Auction logic modeled after Meta and Google Ads.

1,000
Minds / run
Minutes
To verdict
$0
Ad spend
See it run on your creative

Free run. No card. Verdict in minutes.

Three steps. Minutes to verdict.

Drop the creatives. Build the audience. Read the verdict — and interview anyone who saw your ad. The simulation runs in minutes.

Step 01 · Upload

Upload your creatives. Set your copy.

Drop your ad files — image, video, or carousel. Set the headline, primary text, offer, and CTA for each one. Add as many variations as you want to test side by side. Our Cognitive Creative Scan takes it from there.

Step 02 · Audience

Describe who. We build the people.

Write it in plain English — "32-year-old new moms in São Paulo who hunt for clean-label snacks on Instagram." We turn that into a real population, grounded in market research, niche consumer behavior, and purchase habits. Up to 1,000 individuals, each with a name, personality, daily routine, and memory.

Step 03 · Report

Read the verdict. Interview the people.

Winners and losers, format-by-format. Per-archetype reasoning and concrete edits the agents would respond to. Then dig deeper — interview the group that clicked or scrolled past, or chat one-on-one with any agent and ask why they did what they did.

01
ad-01.jpg
Score 88
02
ad-02.jpg
Score 64
03
ad-03.jpg
Score 31
ad-01.jpg
Detailed verdict
Reaction by age
18–2482
25–3468
35–4445
45+28
Sentiment
Positive 62%
Neutral 22%
Negative 16%
Engagement signals
Click
Save
Share
Skip
Hide
01
ad-01.jpg
Score 88
02
ad-02.jpg
Score 64
03
ad-03.jpg
Score 31
ad-01.jpg
Detailed verdict
Reaction by age
18–2482
25–3468
35–4445
45+28
Sentiment
Positive 62%
Neutral 22%
Negative 16%
Engagement signals
Click
Save
Share
Skip
Hide

Everything you need to ship the winner.

Ranked verdicts. Per-agent reasoning. Head-to-head A/B. Any AI plugged in via MCP. The insights that fix the close calls. One report — every angle, every run.

The detailed report

Every creative scored, ranked, broken down by format with per-archetype reasoning. The document a media buyer reads in under a minute and acts on the same day.

AdSim report dashboard

Connect any AI via MCP

Plug Claude, GPT-5, Gemini or any agent into AdSim through MCP. Run simulations from inside their chat before any creative goes live on Meta.

Talk to your simulated audience

Interview any agent one-on-one. Or gather a group for a focus session — verbatim reactions, no synthesis.

Head-to-head A/B

Pick two creatives. Same audience, same conditions. The winner — before you spend a cent.

Insights, generated for you

The engine flags what worked, what didn't, and what to fix — automatically on every run.

Peer-reviewed. Not vibes.

LLM-driven consumer simulation isn't a demo trick. It's a measured field with hundreds of citations. Five landmark papers anchor what AdSim does.

Not a smarter prompt. A deeper engine.

Cognitive Crowd Simulation™ — six pillars behind a virtual society that scrolls, taps, and skips inside feeds modeled on Meta and Google. Every reaction has a reason. You can read every one of them.

Multi-Persona Cognition

Between 100 and 1,000 individual agents — name, age, Big Five, interests, mood. Each one decides for itself.

Layered Decision Gate

Deterministic attention gate runs first. Only the agents that survive reach the qualitative LLM evaluation.

Temporal Realism

Every agent has its own sessions through the day. Fatigue stacks, creatives saturate, post-buy goes dormant.

Synthetic Auction Market

Each impression slot is auctioned against virtual competitors. Bidding model and base cost calibrated to real Meta/Google benchmarks.

Social Network Propagation

Agents follow each other. When a popular one shares, social proof and secondary reach emerge — niche-specific viral coefficient.

Cognitive Creative Scan

The agent doesn't read a transcript — it perceives the creative. Visual, headline, primary text, OCR overlay, CTA, brand and tone, all parsed before the decision lands.

Two dress rehearsals. One costs money.

Same four creatives, two ways to find the winner — simulated in minutes or auctioned through real spend.

BETA
Traditional A/B
  • Cost to test 4 creatives
    From ~200 credits per simulation
    $200 – $800 in ad spend
  • Time to first signal
    In minutes
    5 – 14 days of learning
  • Audience size
    Up to 1,000 simulated agents
    Whatever traffic budget buys
  • Why it failed
    Per-agent reasoning + cognitive scan
    Aggregate CTR only
  • Interview the audience
    Talk 1-on-1 or in focus groups with any agent that saw the ad
    No access — viewers stay anonymous
  • Real insights, automatic
    Auto-generated per creative — what worked, what to fix
    Manual analysis, your call
  • Iterate the creative
    Re-run in the same minute
    New learning phase, new spend
  • Risk if creative flops
    Zero. No money on the table.
    Burned media budget
  • Engine behind the verdict
    6-pillar Cognitive Crowd Simulation™
    Platform black box
  • Privacy of the test
    Stays inside your account
    Visible in Ads Manager

Find the winner before you fund the loser.

Every plan runs the same engine — same virtual society, same auction logic, same per-archetype verdict. You pay for audience size and run volume, not for features. Free monthly credits. No card. No trial clock. Overage packs that never expire.

Free

Real free, not a trial. Refreshed monthly so you can test creatives the week they're due.

$0/ month

Billed monthly

  • 500 credits per month
  • Up to 200 agents per simulation
  • Up to 4 creatives per simulation
  • 1 saved audience · 1 brand profile
  • Agent routine timeline up to 4 hours
  • 1:1 agent interviews
  • PDF report export
  • 3 simulations history (rolling)
Most Popular

Pro

For solo operators shipping ads weekly. Full engine power on tap.

$29/ month

Billed monthly

  • 3,000 credits per month
  • Up to 1,000 agents per simulation
  • Up to 30 creatives per simulation
  • 5 saved audiences · 3 brand profiles
  • Agent routine timeline up to 12 hours
  • Focus groups (3–5 agents)
  • 1:1 agent interviews
  • Accelerated delivery
  • Public report sharing links
  • 30 simulations history
  • Credit overage packs

Max

For teams running cross-platform launches. Every lever unlocked.

$79/ month

Billed monthly

  • 8,200 credits per month
  • Up to 1,000 agents per simulation
  • Up to 75 creatives per simulation
  • 20 saved audiences · 5 brand profiles
  • Agent routine timeline up to 24 hours
  • Focus groups (3–5 agents)
  • 1:1 agent interviews
  • Priority queue
  • Accelerated delivery
  • Unlimited simulation history
  • Exclusive discounts on credit overage packs

Know which ad wins,
before you spend a cent.

Up to 1,000 AI consumers react to your creatives in minutes. Ship only the winner. No card to start.

Start free

Sceptical? Good.

Honest answers. If something's missing, the team replies inside 24 hours.

AdSim runs on Cognitive Crowd Simulation™ (CCS) — our methodology built on top of a measured field with hundreds of published studies. Five anchor what AdSim does. Stanfordmatched AI to 105,000 humans across 476 social experiments at r = 0.85 (Ashokkumar et al., 2024). MIT reproduced classic psychology findings with 1,000-agent panels (Park et al., 2024). Cambridgeshowed agents respond like the real demographic you point them at (Argyle et al., 2023). Wharton ran conjoint analysis that matched textbook results without a single human recruit (Brand, Israeli, Ngwe, 2024). Cornellproved 25 agents with memory and reflection produce emergent social behavior — no scripts (Park et al., 2023). CCS is the engineering layer that turns those findings into a working simulation calibrated to real Meta and Google benchmarks.

CCS is a layered architecture, engineered end to end. Each of up to 1,000 agents is built from market-research grounded data — name, age, Big Five personality, archetype, daily routine, memory, mood, and price sensitivity. When your ad reaches them, the decision flows through six engine pillars in concert: a deterministic attention gate filters who actually notices (fatigue, scroll mode, prior exposure); a qualitative evaluation layer reads the creative the way a person would — visual, copy, overlay text, brand, tone — and produces a first-person reaction; a synthetic auction bids the impression slot against virtual competitors calibrated to real Meta and Google CPM/CPC; a temporal modelrespects each agent's real routine and accumulated fatigue; a social graph propagates virality from popular agents to their network; and a continuous calibration measures error against real benchmarks. Every decision is logged and reproducible — replay any simulation and read the why behind every reaction.

A ranked verdict for every creative — winners and losers, format-by-format, with per-archetype reasoning and concrete edits the agents would respond to. Then go deeper: interview a focus group (everyone who clicked, everyone who scrolled past) or chat one-on-one with any agent and read, in their own words, why they did what they did.

Minutes for you. Hours for them. Runtime scales with the number of creatives and the audience size — a small sim wraps fast, a stress test with hundreds of creatives and 1,000 agents can take 15–30 minutes. Inside the engine the simulation plays out across 6 to 24 hours of agent time — second by second, the way a real day unfolds. Each agent has its own routine: some check Instagram at 7 AM, lunch, and before bed; others only at night. The simulation respects when each persona is actually online, so impressions distribute the way they would in real life. No 14-day learning phase. No tracking pixel. No waiting for Meta to spend.

Practically anywhere. Deepest calibration so far covers the United States, Canada, the United Kingdom, Portugal, Italy, Spain, France, Switzerland, Sweden, Germany, Brazil, Argentina, Chile, Paraguay, Ecuador, Mexico, Israel, the United Arab Emirates, and Japan. For every audience, AdSim runs an intelligent market-research layer trained to surface consumer-behavior patterns and the distinct profiles inside each niche — so the people inside the simulation look like the people in your real market.

Free: up to 4. Pro: up to 30. Max: up to 75. Every creative is judged against the same audience in the same auction — head-to-head, no advantage to whichever you uploaded first. Two simulation modes decide how they compete:

  • Linear (default). Agents browse the way they actually would, drifting between Feed, Stories, Reels, and Search as their routine takes them. One virtual society moves across every format you set. Best for exhaustive, balanced coverage cross-format — every creative gets fair exposure.
  • Per-format. Each format runs as its own A/B arena, with the same audience and isolated competition. Best when multiple variants compete inside a single format (e.g. three Stories ads head-to-head) and you want the cleanest possible isolation.

Yes. Creatives are encrypted at rest, scoped to your account, and never used to train external models. Full disclosure on /privacy.