Privacy statement
Last updated 13 June 2026
LensaSim is an educational process-simulation tool. We collect as little as possible and never sell your data. This page explains, in plain terms, what we store and why.
What runs in your browser
The simulation engine, the component databank, your lesson progress and any project you have not synced to the cloud all run and live on your own device (in the browser). They are not sent to us unless you explicitly sign in and save to the cloud.
What we store when you have an account
If you create an account we store your email address (to sign you in and identify your work), any projects, classrooms, assignments and submissions you choose to save, and a count of AI usage (to enforce fair daily limits). Sign-in uses one-time email codes — we do not store passwords.
Third parties we rely on
We use a database provider to store the data above, an email provider to send sign-in codes, a payment processor (Stripe) if you subscribe, and Anthropic's Claude API to power optional AI features. Each receives only what it needs to do its job. Your flowsheet text is sent to the AI provider only when you use an AI feature.
Anonymous usage analytics
To understand how LensaSim is used — for example, how many people visit the site each day and how many open and run the simulator — we use privacy-friendly, cookieless analytics (Vercel Web Analytics). It counts page views and a few anonymous events (such as running a simulation) in aggregate. It sets no cookies, does not build a profile of you, and does not collect personally identifying information.
What we don't do
We do not sell or rent your personal data, and we do not show third-party advertising. We do not use your saved work to train models.
Your choices
You can use the whole simulator and the guided lessons without an account. If you have an account, you can delete your projects and classrooms at any time, and request deletion of your account by emailing us. Local data clears when you clear your browser storage.
Contact
Questions about privacy? Email lensa@lensatech.com.
LensaSim is for education, training, conceptual design and research. It is not a system of record and should not be used to store sensitive personal data.