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Decisions Lab

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We Simulate Human Responses

The #1 message optimization tool for cold outreach

Powering the world's best teams From next-gen startups to established enterprises.

Microsoft
Time Auction
HKSTP
Sourcy
Algreen
HKU
Microsoft
Time Auction
HKSTP
Sourcy
Algreen
HKU

Trusted by forward-thinking teams worldwide

Most cold emails go unanswered

BD Reps send hundreds every week and still hear nothing back
Early Pilot Results
20x reply rate
Lift from 0.3% to 6.7% in reply rate for an AI B2B SaaS company.
Messaging Optimization

Outreach Prospects Can't Ignore

Spectrum predicts each prospect's response, crafts multiple variants, and auto-sends the winner—so you only send what resonates.

Predict Reactions

Simulate each prospect's reaction before you hit send, with likelihood scoring and feedback. Spectrum creates a persona for each prospect based on public data to understand their challenges, motivations, and preferred writing style.

Simulating Response
AL
Alex Li
Head of Growth, Meta
Key Feedback
  • "I'm more interested in knowing who is using it and why I should trust your product."
  • "My current focus is to meet the Q3 goal in user growth. If the message ties to my KPI, I'll be more interested to learn more."
  • "The writing is too formal. I like messages that are more conversational and even with a bit of humor."
23% Reply Likelihood
View 7 more personas

Generate Variants

Automatically craft and score multiple message variants, then pick the one with the highest predicted reply rate.

Generated Variants for Alex Li
Auto-Sent
Variant 147%

Used by growth folks at GitLab and Canva, our tool helps you hit those Q3 KPIs without guessing what works—or writing another stiff, robotic email.

Variant 228%

We're helping teams like yours test cold outreach messages before sending—so you can grow faster, with less guesswork.

Variant 324%

What if you could preview how your prospects will react before you even hit send—like a cheat code for Q3 growth?

Send & Learn

Automatically tracks email opens, clicks, and replies; analyzes each recipient’s persona, and keeps refining the simulation engine to maximize your next response.

Total Emails Sent
10,142
Open Rate
67%
+26%
Click Rate
28%
+16%
Reply Rate
14%
+8%

The Spectrum Advantage

01

93% Real-World Accuracy

Live AI tests matched customer feedback with a 93% success rate in predicting which messages resonate.

02

2× Cultural Depth vs. OpenAI

We analyze twice as many cultural signals, so every subject line, hook, and frame hits the right note.

03

20 Billion Data-points

Our psychographic and behavioral dataset with 20 billion points creates one-to-one messaging at infinite scale.

Pricing that scales with you

Pricing is simple: how many people you want to reach each month. No per-seat or email volume fees. Built to turn outreach into meetings and pipeline.

Monthly
Toggle Annual Billing
AnnualSave 25%

Free Tier

Free

Simulate 60 prospects/month

  • Simulate outreach to up to 60 prospects per month
  • Upload your own leads
Most Popular

Pro Tier

$199/month

Simulate 300 prospects/month

  • Simulate outreach to up to 300 prospects per month
  • Sales insights & analytics
  • Priority support

Premium Tier

$559/month

Simulate 1000 prospects/month

  • Simulate outreach to up to 1000 prospects per month
  • 24/7 dedicated support
  • Enterprise-grade reports
  • Dedicated account manager

Let's Engineer the Future of Sales.