About SunFly
SunFly helps sunscreen users know when they need more protection. It makes a skin stamp with ink that changes color under ultraviolet light. The visual mark prompts people to apply enough sunscreen and reapply it at the right time. The technology is also designed for product partners that may license a version built into sunscreen caps.
SunFly is based at CoMotion Labs in Fluke Hall, Seattle. Michael Croix founded the company and serves as chief executive officer. The UV Indicator Stamp does not block ultraviolet radiation; it only provides a visual reminder. Users must still follow the directions on their sunscreen labels.
Funding Rounds (SEC Form D)
| First sale | Filed with SEC | Amount sold | Investors | Avg. check | Terms | Filing |
|---|---|---|---|---|---|---|
| Oct 28, 2022 | Dec 9, 2022amended Nov 9, 2026 | $869,941of $1.8M target | 36 | $24,165 | Equity, Series Seed Preferred Stock, including conversion of SAFE convertible securitiesRule 506(b) | Form D/A ↗1 earlier filing |
| Dec 18, 2018 | Jan 2, 2019 | $75,000of $1.5M target | 2 | $37,500 | Series Seed Preferred Stock, including conversion of SAFE convertibles securities.Rule 506(b) | Form D ↗ |
| Total, two offerings | $944,941 | |||||
First sale is the date the first investor in the offering committed to invest. Companies must file Form D within 15 days of that date, so filing dates run later.
Why Investors Backed SunFly
SunFly is developing a skin indicator for sunscreen users and brands. A mark on the skin provides an immediate visual signal during application. The company is pursuing both a stand-alone product and a licensing route. Its development plan covers ink, package integration and safety testing.
The problem it targets
SunFly estimates that sunscreen users need about 3.5 times more product than they currently apply. It also says they should reapply more often. It attributes every sunburn to excessive ultraviolet exposure. The same source is associated with roughly nine in ten skin cancers and cases of premature skin aging. The product targets these application gaps with a reminder placed directly on the skin.
What the product does
Users place the stamp on exposed skin, then spread sunscreen across the mark and nearby areas. Clear ink indicates adequate coverage. A returning color tells the user to reapply. The stand-alone model is intended for any SPF-rated sunscreen. The cap version puts the stamp inside the package. The ink works with every sunscreen format and active-ingredient type. SunFly estimates the cap could increase sunscreen use up to 6.6 times for licensees.
Progress so far
SunFly has developed its color-changing ink. The Stamp-In-Cap has utility patent protection, while the stand-alone indicator remains in development. The next phase includes final ink and stamp work plus safety testing. These remaining steps create execution risk around completion and safe use.
Who backs it
The National Science Foundation supports SunFly through a Phase II small-business research award. Its scope covers final work on the SPF Indicator Stamp and related safety testing. Michael Croix leads the project.
We wrote this summary from public statements by SunFly and its investors. It is not investment advice.
Leadership Team
Executive officers and directors listed on SunFly's Form D filed Nov 9, 2026.
Earlier filings also listed Robert Wallach (executive officer, last listed Jan 2019).