Simple, Transparent Pricing

Start free, scale as you grow. No hidden fees.

Pebble

Free

Perfect for trying out Quillstone

  • 300K characters/month
  • 1 team member
  • 1 brand guide
  • Full 3-layer validation
  • /audit and /correct endpoints
  • 10 requests/minute
  • $1 per 100K overage
Start Free

Feather

$19/month

For individual creators and small teams

  • 3M characters/month
  • 2-3 team members
  • 5 brand guides
  • Full 3-layer validation
  • /audit, /correct, and /transform
  • 60 requests/minute
  • $0.75 per 100K overage
Get Started
Most Popular

Keystone

$79/month

For growing teams and content operations

  • 20M characters/month
  • 5-10 team members
  • 15 brand guides
  • Full 3-layer validation
  • All endpoints (+ /generate)
  • 300 requests/minute
  • $0.50 per 100K overage
Get Started

Citadel

$349/month

Enterprise-grade compliance at scale

  • 100M characters/month
  • 20 team members
  • Unlimited brand guides
  • Full 3-layer validation
  • All endpoints + Priority support
  • 1000 requests/minute
  • $0.40 per 100K overage
Get Started

Frequently Asked Questions

What counts as a "request"?

Each API call to /audit, /correct, /transform, or /generate counts as one request. Rate limits reset daily at midnight UTC.

Can I upgrade or downgrade anytime?

Yes! You can change your plan at any time. Upgrades take effect immediately, and downgrades take effect at the end of your current billing period.

Do you offer annual pricing?

Yes! Annual plans save 20%. Contact us at sales@quillstone.dev for annual pricing.

What's your refund policy?

We offer a 30-day money-back guarantee on all paid plans. No questions asked.