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Plans

PromptGuard offers three self-service plans designed for teams of every size.

Free

$0/monthPerfect for evaluation and small projects.
  • 10,000 requests/month
  • 1 project
  • 1 API key
  • Regex-based threat detection (70-80% accuracy)
  • Basic PII redaction
  • Default security preset only
  • Community support

Pro

$49/monthFor production applications needing reliable security.
  • 100,000 requests/month
  • Up to 5 projects
  • Up to 10 API keys per project
  • AI-powered threat detection (~95% accuracy)
  • All security presets
  • Custom policies
  • Email alerts
  • Email support

Scale

$199/monthFor high-volume applications with enterprise needs.
  • 1,000,000 requests/month
  • Unlimited projects
  • Unlimited API keys
  • AI-powered threat detection (~95% accuracy)
  • All security presets
  • Custom policies
  • Advanced analytics & dashboards
  • Priority support
  • Email alerts
  • Soft limits (never blocks your app)
Need a custom plan? Contact [email protected] for enterprise pricing with dedicated infrastructure, SLA guarantees, and custom rate limits.

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Feature Comparison

FeatureFreeProScale
Monthly requests10,000100,0001,000,000
Projects15Unlimited
API keys per project110Unlimited
Over-limit behaviorHard block (429)Hard block (429)Soft limit (alerts only)
Regex-based detection70-80% accuracy70-80% accuracy70-80% accuracy
AI-powered detection—~95% accuracy~95% accuracy
PII redactionBasicBasicBasic
Security presetsDefault onlyAll 6 presetsAll 6 presets
Custom policies—YesYes
Basic analyticsYesYesYes
Advanced analytics——Yes
Time-series dashboards——Yes
Threat distribution——Yes
Email alerts—YesYes
Audit logs—YesYes
Secure Scraping APIYesYesYes
Agent Security APIYesYesYes
StreamingYesYesYes
SupportCommunityEmailPriority email

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Rate Limits

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Monthly Request Quotas

Your plan determines how many requests you get per month:
PlanLimitBehavior When Exceeded
Free10,000Returns 429 Too Many Requests
Pro100,000Returns 429 Too Many Requests
Scale1,000,000Continues processing + email alerts

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Infrastructure Rate Limiting

All plans share the same anti-abuse rate limit:
  • 100 requests per minute per IP address (enforced by Cloud Armor)
  • This is a security measure, not a pricing feature
  • Contact [email protected] for higher limits

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Hard Limits vs Soft Limits

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Hard Limits (Free & Pro)

When you exceed your monthly quota, requests are blocked: 
{
  "error": {
    "message": "Monthly request quota exceeded. Please upgrade your plan.",
    "type": "rate_limit_error",
    "code": "quota_exceeded"
  }
}
What to do:
  • Upgrade to a higher plan
  • Wait for the next billing cycle
  • Optimize request volume

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Soft Limits (Scale)

Scale plan never blocks your application:
  • Requests continue processing normally
  • You receive email alerts about overage
  • Overage is logged for billing analytics
  • Your application keeps running without interruption

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Usage Tracking

Monitor your usage in real-time: Via Dashboard: Navigate to app.promptguard.co → Usage to see:
  • Current period usage vs. quota
  • Daily/weekly/monthly trends
  • Per-project breakdown
  • Over-quota events
Via API: 
curl https://api.promptguard.co/api/v1/usage/stats \
  -H "X-API-Key: $PROMPTGUARD_API_KEY"

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How Usage Is Calculated

One request = one API call to any of these endpoints:
EndpointCounts as
POST /api/v1/chat/completions1 request
POST /api/v1/completions1 request
POST /api/v1/scrape1 request
POST /api/v1/agent/validate-tool1 request
Usage is independent of:
  • Number of tokens in the request/response
  • Model used
  • Response length
  • Whether the request was blocked by security
PromptGuard uses a pass-through model: you provide your own LLM API keys (OpenAI, Anthropic, etc.), and PromptGuard only charges for security services. LLM costs go directly to your provider.

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Upgrading

  1. Visit app.promptguard.co
  2. Navigate to Billing
  3. Select your new plan
  4. Your new limits take effect immediately
Set up usage alerts to get notified before you approach your quota limit, so you can upgrade proactively.

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FAQ

Yes! Sign up for a free account and evaluate the platform. When you’re ready for AI-powered detection and more capacity, upgrade to Pro.
Your plan changes at the next billing cycle. If your usage exceeds the new plan’s limits, excess requests will be blocked until the next cycle resets.
Yes. Every request to our API counts, including retries and security-blocked requests. Implement smart retry logic to minimize wasted quota.
Plans are billed monthly at a flat rate. Unused requests do not roll over or qualify for refunds.
We accept all major credit cards (Visa, Mastercard, American Express) via Stripe. Contact sales for invoice-based billing.

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Enterprise

Need more? Contact [email protected] for:
  • Custom request volumes
  • Dedicated infrastructure
  • SLA guarantees
  • SSO / SAML integration
  • Custom rate limits
  • Invoice billing
  • Onboarding support