Patterns over time
What's moving across the cohort
Week-over-week change in real users. Aggregated, opt-in, anonymous.
For brands and clinics
Most systems record inputs. Very few measure what actually changed.
Stella tracks skin over time. Now we're making that usable elsewhere.
What you're plugging into
Not skin type. Not a single scan. Change, observed over time.
The layer most systems don't have. What actually shifted in someone's skin — over weeks and months, alongside their routine and the things that move it. Aggregated across users, with explicit opt-in. Useful for brands, clinics, and platforms that care about real outcomes.
Context, not just outcomes
The why, alongside the what
Score shifts read against routine, sleep, stress, and cycle. The signal is interpretable, not just observed.
Honest data hygiene
We tell you when there isn't enough yet
No invented patterns. No fabricated confidence. If the data hasn't shown a clear shift, we say so.
Reviews tell you what people thought. Stella tells you what changed.
Where this shows up
Two integrations live now. More on the way.
Product performance, in real routines.
Understand how products perform in actual use. Aggregated, opt-in cohort data showing what people kept, what they stepped back from, and where results were unclear. Not reviews. Not claims. Observed patterns over time, across real users.
Pre-consult, with data.
See how someone's skin has moved before the consult begins. Their longitudinal view, contextual signals (routine, sleep, stress, cycle), and what's shifted since the last visit. Less guesswork. More informed decisions.
Booking integrations, e-script platforms, and brand-side tools also under exploration. Tell us what you'd want.
How it works, today
We're at the validation stage. Here's what that means.
We work with each partner directly. The API comes later — when we know what you actually need.
- 01A discovery call to understand your use case and where Stella's data would land.
- 02A custom report on what's moving in the relevant cohort, refreshed quarterly.
- 03A working call each month to walk through what we're seeing and what you'd need at scale.
Where this is going
Three APIs, built from real usage.
We're productising this into three APIs: Skin Change, Product Performance, and Pre-Consult Snapshot. Built from real usage — not assumptions about what brands and clinics need. The shape of these APIs will be informed by the partners we work with now.
How we work
Four principles.
- 01Skin data only flows out with the person's explicit opt-in. Every time.
- 02Observable, not diagnostic. We surface patterns; we don't make medical claims.
- 03Clarity over volume. Fewer signals, better understood, beats more signals barely interpretable.
- 04No data resale. Ever.
Who this is for
Teams who care about outcomes, not just inputs.
People who want to understand what actually works on skin. Who measure rather than guess. Who are comfortable building early — with us, not after us.
If that's how you work, we'd like to hear from you.
Work with us
Plug into real outcomes.
We're opening a small number of new integrations this quarter. Tell us what your work touches and what you'd want from Stella. We read every request.
Built by
Rishabh Rastogi, CTO
Got questions about plugging in? Send them through the form above — Rish reads every one.