Predict which experiment wins before you run the test

Buildbox simulates how thousands of statistically diverse user archetypes respond to your product variants. So you invest A/B test slots in ideas with the strongest predicted lift.

Book a demo →30 min · see it on your product
How it works
01
┌──────────────────┐
│  Logo      ☰     │
├──────────────────┤
│  ████████████  │
│  ████  ██████  │
│  ████████████  │
│                  │
│   [ Buy now ]   │
│                  │
│  $49  $99  $199 │
└──────────────────┘
Paste any page
URL, screenshot, or description. Production, staging, or behind auth. No SDK required.
Any surface, any environment
→
02
  ·  ◦    ·     ·
  ◦    ●  ◦  ·
VP Eng       ◦  ●
skeptical  ·     ·
  ·  ●  ·    ◦
    ·     CMO    ·
  ◦  ·  price-
            sensitive
1,000 personas simulate
Roles, industries, and geographies your team can't easily recruit for. Every trace is auditable.
~14 minutes
→
03
PREDICTED WINNER

SOC 2 + HIPAA badges

+14.3% predicted lift

━━━━━━━━━━━━━━━━━
01 ████████████ 3.2%
02 ████████   2.9%
03 ███████    2.8%
04 ██████     2.7%
Ranked prediction
Consensus ranking with confidence scores and implementation evidence.
High confidence
The input
You have the ideas. You need the evidence.
Your experiment backlog
Add SOC 2 and HIPAA badges above foldnot tested
Replace feature grid with ROI calculatornot tested
Lead with annual pricing (20% off)not tested
Add "Start free trial" as primary CTAnot tested
Simplify to 2 tiers (Starter + Enterprise)not tested
...3 more ideas
https://
Production · Staging · Behind auth · Localhost
Focus audience (optional)
Enterprise procurementManufacturingSouth Asia+ Add focus
Simulating 1,000 personas across 10 variants...
→ 14 min →
· · · · · · · ·
· · · · · · · ·
· · · · · · · ·
· · · · · · · ·
Ranked prediction
01SOC 2 + HIPAA badges above fold+14.3%
02Replace feature grid with ROI calculator+3.6%
03Lead with annual pricing (20% off)0.0%
04Add "Start free trial" as primary CTA-3.6%
05Simplify to 2 tiers-25.0%
Winner
SOC 2 + HIPAA badges above the fold
+14.3%94% consensus · 3.2% predicted conversion
The output
Your 10 best ideas, ranked before you write a single ticket
You have 20 experiment ideas and 3 A/B test slots this quarter. Buildbox tells you which ones are worth the engineering investment. With the evidence to back it up.
buildbox|pricing page · 10 variants · 1,000 personas · 14 min
Predicted Winner
Add SOC 2 and HIPAA badges above the fold
Replace the customer logo strip with a compliance badge row. Move “Enterprise-ready” from footer to primary subheadline.
+14.3%predicted lift
94%agent consensus
3.2%predicted conversion
01SOC 2 + HIPAA badges above fold3.2%+14.3%
02Replace feature grid with ROI calculator2.9%+3.6%
03Lead with annual pricing (20% off)2.8%0.0%
04Add "Start free trial" as primary CTA2.7%-3.6%
05Simplify to 2 tiers (Starter + Enterprise)2.1%-25.0%
...5 more variants below 2.0% predicted conversion
Top Drivers
↑
Compliance badges resolved trust hesitation for enterprise buyers
↑
Badge placement above fold caught attention in first 3 seconds for 78% of personas
Top Blockers for #5
↓
Two-tier structure confused mid-market personas
↓
Removing mid-tier eliminated anchoring effect
Top 5 of 10 · baseline 2.8%high confidence
Beyond the ranking
Understand why a variant wins
◈
Behavioral traces
Every persona gets an individual verdict. 1,000 simulated decisions, each with a reason. Not aggregates.
Variant: SOC 2 badges above fold · 1,000 personas
32
converted
3.2%
conversion
+14.3%
vs baseline
968
bounced
VP Eng · Cloud Infrastructure
Compliance badges resolved purchase hesitation.
Procurement Mgr · CPG
No volume discount or bulk pricing visible.
◉
Simulate audiences you can't recruit
Generated by a proprietary population model. Validated for representativeness across role, industry, geography, trust level, and decision style.
Enterprise procurement · IndiaManufacturing IT · GermanyMid-market growth · USSaaS buyers · LATAMHealthcare complianceGov't procurement
⬡
Multi-model consensus
Multiple independent models score your variants. When they agree, confidence is high. When they don't, we tell you.
Reduces correlated bias
↻
Calibration over time
Record real A/B test outcomes. Every result feeds back to improve the next prediction for your product. Gets smarter with your data.
84%
accuracy at start
94%
after 10 experiments
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See it on your product
Book a 30-minute demo. Optionally share a URL or attach a screenshot of the page you want to test.
Book a demo →