Pricing
Pick the plan that fits how you write or teach.
Every plan uses the same interpretable engine. Paid plans unlock the perplexity model, draft comparison, PDF export, and the educator batch workflow. No fake testimonials, no dark patterns.
Free
$0forever
Try the style-only analyzer with saved history.
- 10 analyses per month
- Style-only model (AUC 0.855)
- Full feature breakdown
- Saved history
Most popular
Pro
$12/month
For writers and students who want the full picture.
- Unlimited analyses
- AI writing assistant (grammar, clarity, tone)
- Deep analysis with perplexity
- Draft comparison
- PDF export
Honest limits
Checkout is currently handled by our team. Sign up for free, hit the usage limit, and reach out. We will comp your account to Pro or Campus while we finish wiring up Stripe self-serve billing.
WriteSignal shows probabilistic style signals, not proof of AI use. No plan gives you a definitive verdict. Formal academic prose and non-native English writers can trigger false positives on any tier.