Deep device intelligence and a persistent visitor ID you can build on — a complement or alternative to Castle's account-security focus.
tracio.ai: 130+ signals for device profiling
Castle: Device signals within account risk; not a dedicated fingerprint engine
tracio.ai: MIT-licensed, public SDK
Castle: Proprietary SDK
tracio.ai: VM-isolated + polymorphic + tamper-resistant client
Castle: Not part of its account-security model
We believe in transparency. Here is where we excel and where Castle has genuine strengths.
Cost analysis at different usage levels.
tracio.ai provides deeper device intelligence than Castle. You may want to run both solutions in parallel during migration to compare detection results.
Add the tracio.ai client SDK to your frontend (3 lines of JavaScript). Remove the Castle.js SDK if you were using client-side collection
Migrate your server-side Castle API calls to the tracio.ai API. Map Castle's risk levels to tracio.ai's suspect scores and smart signals for equivalent functionality
Configure webhooks and alerting to match your existing Castle-based workflows. tracio.ai supports the same real-time event patterns
The best choice depends on your priorities. Here is a straightforward breakdown.
See how Castle stacks up against the wider market — including tracio.ai and other credible tools — in our honest alternatives roundup.
Read the Castle alternatives guideStart on the free tier — 2,500 API calls a month, no sales call required. Upgrade when the verdicts prove themselves.