Empress
Empress does not offer a free tier or basic plan.
At a glance
Starts at
from $19 per month
Price as published by the vendor, September 2026.
Free tier
No
Platforms
Web
Best for
Developers, researchers
Not for
Single User Projects
3.8 out of 5
Scored by Alex after real useOur verdict
Empress is an immutable xAPI ledger for measuring behavior and keeping evidence. It suits developers and researchers but can be expensive and lacks a free tier, which may make it unsuitable for those on a budget.
✓What it does well
Immutable RecordsEmpress keeps an immutable record of all actions and behaviors.
Immutable LedgerKeeps an unchangeable record of all actions and behaviors.
Privacy FocusPrioritizes privacy by storing statements of real usage in the ledger.
✕Where it falls short
No Free TierLacks a free plan, making it costly for smaller projects or startups.
Multi-Tenant SystemOnly supports multi-tenant environments, not single-user systems.
XAPI ComplianceFully xAPI-compliant but may lack specific functionalities for non-xAPI use cases.
Key features
PricingStarts at $19 per month, with various plans available.
Multi-Tenant SupportDesigned for multiple users or teams within an organization.
xAPI ComplianceFully adheres to xAPI standards ensuring interoperability with other tools.
Pricing TransparencyClear pricing structure starting at $19 per month.