← All website monitoring tools
Free Tier (8 options, 2026)
Tools with a free plan or always-free tier — perfect for solo projects, side businesses, or testing before committing to paid plans.
Puntuación de fraude integrada para pagos con Stripe — incluida sin costo con las tarifas estándar, con un complemento de $0.02 por transacción para reglas personalizadas.
Per-query IP / email / device / URL fraud scoring API — generous free tier, paid from $0.0008/query.
Browser fingerprinting library + paid Pro API — free OSS core, paid plans from $99/mo.
Reemplazo gratuito para el CAPTCHA de Cloudflare — invisible por defecto, 1M de desafíos/mes en el plan gratuito.
Privacy-focused captcha alternative to reCAPTCHA — free Basic, paid Enterprise / Pro.
Google's enterprise captcha + risk scoring — first 10K assessments/mo free, $1/1K above.
API-first fraud screening with social-media + email enrichment — published from $599/mo.
Identity verification platform — published per-check pricing from ~$0.50-$2.00, used widely in fintech.
Tips for free tools
- Free tiers typically limit you to a few sites or basic features.
- Self-hosted free options give unlimited but require server admin.
- Watch for hidden caps on free tiers (data, regions, retention).