Empress
Empress does not offer a free tier or basic plan.
At a glance
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
✕Where it falls short
Key features
Questions about Empress
What is Empress?
Empress is an immutable xAPI ledger for measuring behavior and keeping evidence. It keeps an unchangeable record of all actions and behaviors, and the reviewer notes that it prioritizes privacy by storing statements of real usage in the ledger. It runs on the web.
Does Empress have a free plan?
No. Empress has no free tier or basic plan, and paid pricing starts at $19 per month. The reviewer says it can be expensive and that the lack of a free plan makes it costly for smaller projects, startups and anyone on a budget.
Can Empress be used for a single-user project?
No. Empress only supports multi-tenant environments, designed for multiple users or teams within an organization, and does not support single-user systems. Toolio lists it as not for single user projects, and the reviewer counts this among its shortcomings.
Is Empress xAPI compliant?
Yes. Empress fully adheres to xAPI standards, which supports interoperability with other tools. The reviewer notes that it may lack specific functionality for use cases outside xAPI and lists this among its shortcomings.
Who is Empress for?
Toolio lists Empress as best for developers and researchers, and the reviewer says it suits them as a way to measure behavior and keep evidence. Alex scored it 3.8 out of 5 after real use on 5 Oct 2026. It has been listed on Toolio since September 2024.