Prynt vs FingerprintJS
Prynt is the open-source, self-hostable FingerprintJS alternative — the same visitor IDs and Smart Signals, on your own infrastructure, without per-call pricing.
FingerprintJS Pro is a strong, mature product — this page is an honest look at where Prynt differs. The short version: if you want to own your visitor data, run detection on your own infrastructure, and avoid per-API-call pricing, Prynt is built for you. If you want a fully managed vendor cloud and don’t mind data leaving your box, FingerprintJS is a fine choice.
| Capability | Prynt | FingerprintJS Pro |
|---|---|---|
| License | Open source (MIT) | Proprietary |
| Hosting | Self-host or cloud — your infra | Vendor cloud only |
| Data ownership | Visitor data never leaves your box | Data flows to vendor |
| Pricing | Free to self-host; no per-API metering | Per-API-call, scales with traffic |
| Confidence score | Included | Included |
| Smart Signals (bot, VPN, proxy, Tor…) | Included, all tiers | Higher paid tiers |
| Residential-proxy detection | Included | Add-on |
| Behavioral biometrics | Included | Not offered |
| JA4 TLS fingerprinting | Included | Limited |
| AI-agent classification | Included | Partial |
| Sealed/encrypted client results | Included (AES-GCM) | Included |
| Reputation network | Privacy-preserving, opt-in | Vendor-controlled |
| Server SDKs | Node, Go, PHP, Java, Ruby, .NET, Python | Several |
| Edge connectors | Cloudflare Worker, nginx/OpenResty | Cloudflare, Akamai |
| Mobile SDKs | iOS, Android, Flutter, React Native | iOS, Android, Flutter, RN |
Why teams switch to Prynt
- Data residency & compliance: self-hosting means raw visitor data — IPs, fingerprints, behavior — never leaves your infrastructure, which makes GDPR, HIPAA and data-residency reviews dramatically simpler.
- Predictable cost: no per-identification metering. Fingerprint every request without watching a meter.
- More signals, no upsell: behavioral biometrics, residential-proxy and AI-agent detection ship in the core, not a premium tier.
- No lock-in: MIT-licensed, open protocol, and a drop-in migration path from the FingerprintJS browser API.
Migrating is a small diff
Prynt’s browser agent mirrors the familiar load() / get() shape, so
migration is mostly swapping the script URL and endpoint. See the
migration guide for a side-by-side.
Related
Device fingerprinting · Bot detection · Account takeover · Glossary · SDKs