500 Responses for the Price of 20
And validation beyond UX
Synthetic Users charges $2-27 per simulated respondent for UX testing. TestSynthia gives you 500 responses for $79/month — 30x cheaper at scale — with stateful personas that validate pricing, messaging, and features, not just button clicks.
Compare with Synthetic Users
cheaper at scale
demo run
stateful personas
The Comparison
Per-user pricing vs. unlimited validation.
TestSynthiaThe Math
Per-user pricing penalizes scale.
The Scaling Trap
At $5 per user, a 500-response pricing test costs $2,500. A 1,000-response feature prioritization study costs $5,000. The more you validate, the more you pay. That's backwards.
UX-Only Blindspot
Synthetic Users excels at 'does this button work?' But it doesn't test 'will anyone pay for this?' or 'which message resonates?' You're optimizing the interface while the business model bleeds.
Isolated Agents
Synthetic Users' OCEAN model creates individual personalities, but they don't talk to each other. Real markets are social. TestSynthia's personas influence, debate, and spread opinions like real humans.
When to Choose
Which Tool Fits Your Budget?
Use Both If...
Use Synthetic Users for detailed usability flows. Use TestSynthia for market validation, pricing, and messaging. UX testing + market testing = complete coverage.
Choose Synthetic Users If...
You need deep UX usability testing with OCEAN personality modeling. You run 1-2 small tests per month and prefer pay-per-use pricing.
Choose TestSynthia If...
You run frequent validations across pricing, messaging, and features. You need scale without per-user costs. You want social simulation, not just individual responses.
The difference
Per-user costs vs.
flat-fee freedom.
Before
$2-27 per user, UX-only scope
After
$79 flat, full validation stack
Pricing
Simple pricing. No per-user tax
Unlimited tests, flat fee
TestSynthia
- ✓1M+ stateful AI personas
- ✓500 responses per month
- ✓Priority generation (~10 min)
- ✓Top-ups available
- ✓No contract
Synthetic Users
- ✓Per-simulated-user pricing
- ✓OCEAN personality model
- ✓UX/usability focus
- ✓Pay-as-you-go
No subscription. Pay per simulated respondent. RAG enrichment adds $5 per user.
Frequently asked questions
Compare with other tools
See how TestSynthia stacks up against more market research platforms
UserTesting connects you with real humans. TestSynthia simulates them — a living market simulation with 1M+ stateful AI personas. Get directional signal in 10 minutes. Validate before you invest in traditional user research.
Maze tests interactive prototypes with real users. TestSynthia tests your concept with 1M+ AI personas before you write a line of code. Get directional feedback in 10 minutes, not days.
Artificial Societies simulates how content performs on social media. TestSynthia simulates whether your product, pricing, and messaging will land before you ship. 1M+ stateful AI personas. 10-minute directional signal. $2.99 to try.
Stop paying per user.
Start validating freely.
Every test shouldn't trigger an invoice review. Flat pricing means you can iterate without fear.