Pre-launch
Avoid building the wrong thing before launch.
Pressure-test your thesis before engineering time turns into sunk cost.
Get startedSimulate before you build
Validate your startup idea
before you build it.
Delfy creates simulations with synthetic personas
to reveal objections, adoption triggers, and signals
of traction with visual clarity.
Simulate customers, investors, competitors, and operators before you build.
Personas
Let AI audiences evaluate the market signal.
Customers, investors, builders, competitors, and interest groups react from different angles.
Simulation
Turn raw ideas into sharper decisions.
Compare objections, buying triggers, and willingness to pay before you commit.
Metrics
Read the signal behind every score.
See clarity, relevance, differentiation, trust, and market pull in one pass.
Pré-launch
delfy
Avoid building
the wrong thing
before launch.
100 AI personas
evaluating your
startup idea.
Simulate customers, investors,
competitors and more
then see what they evaluate:
One-liner
Landing
Pitch
PRD
Pricing
Personas
Check if your idea
3.12/5.0Mean WTP
Willingness to Pay distribution by bracket
1.0-2.01
2.1-3.071
3.1-4.027
Try Live Demo
How it works
Your meetings are full of insights. Delfy makes sure none are lost.
>5min
Get insights in under 5 minutes
7x
Faster insights before launch
+100
Personas curated with individual criteria
Try it yourself
Airbnb 2008 pitch
Investors passed for 4 recurring reasons: trust, cancellation clarity, regulation, and competition.
FAQ
Questions before you simulate.
What can I validate with Delfy?
You can test startup theses, landing page messaging, PRDs, pitch decks, pricing, and one-liners before spending weeks building or pitching.
Who are the AI personas?
Delfy simulates customers, investors, operators, competitors, and other relevant audiences so you can compare reactions from multiple market angles.
How quickly do I get results?
Most simulations return structured scores, objections, buying triggers, and strategic recommendations in minutes.
Can I compare different versions of an idea?
Yes. You can run variations of the same thesis, message, or artifact and compare where the market signal gets stronger or weaker.
Do I need existing customer research?
No. Delfy works from the artifact or idea you provide, but existing notes, interviews, or positioning context can make the simulation sharper.
Founder notes.
Get Pitch Deck Feedback Before Your Next Investor Meeting
The 5 narrative failure modes that kill pitch decks, a 30-minute cold-read audit, and a framework for getting structured feedback before your investor meeting.
8 min read
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Test Your Landing Page Messaging Before Launch
The 5 above-the-fold messaging mistakes that kill conversion, a 20-minute cold-traffic audit, and a framework for testing your landing page with simulated visitors before launch day.
8 min read
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Validate Your PRD Before Committing Engineering Time
The 5 failure modes that turn PRDs into wasted sprints, a 25-minute pre-sprint clarity audit, and a framework for testing requirements with simulated builders before committing resources.
8 min read
Read More