It is 6:42 a.m. somewhere, and a phone buzzes. Not with a meeting reminder or a breaking headline - with a verdict. You owe your body two hours and eleven minutes of sleep. You will be groggy until 7:30. Your first real focus window opens at 10:15. This is Rise Science talking, and it has no interest in whether you slept "well." It wants to know what you can actually do today.
01 / WHO THEY ARE NOWThe energy company that happens to track sleep
Rise Science is a Chicago health-tech company of roughly 29 people, and its entire product is a single app called RISE. On paper it is a sleep tracker. In practice it is something stranger and more useful: a daily energy forecast. Open it and you don't get a star rating or a smiley face. You get a vertical map of your day - peaks where you'll feel sharp, valleys where you won't, and a running tab of how much sleep you owe yourself.
Five million people have downloaded it. It carries a 4.7-star rating on the App Store and a place on Apple's Best Apps list. None of which would have impressed the two engineers who started it, because the thing they were chasing was never downloads. It was a number nobody else was measuring.
"The only sleep score that matters is sleep debt."
// Rise Science, on why they deleted the smiley face02 / THE PROBLEM THEY SAWEveryone tracks sleep. Almost nobody acts on it.
By the late 2010s, sleep tracking was everywhere and useful nowhere. Your watch told you that you slept 6 hours and 12 minutes. Your ring gave it an 84. And then - nothing. A number floated up, you nodded, and you went and drank coffee at 4 p.m. anyway. The data had no opinion about your actual day.
Jeff Kahn and Leon Sasson thought the whole category had the wrong target. A nightly score answers a question almost nobody is asking. The question people actually have is simpler and more selfish: when will I feel like myself today, and what can I do about it?
Their answer leaned on two things sleep researchers broadly agree on. The first is sleep debt - the running deficit between the sleep you need and the sleep you get, accumulated over days, not graded one night at a time. The second is your circadian rhythm - the internal clock that decides when you're wired and when you're useless, independent of how much coffee you've had.
"RISE not only predicts your daily energy schedule - it helps you take control of it."
// The product thesis, in one sentence03 / THE FOUNDERS' BETTwo underslept engineers from Northwestern
Jeff Kahn did not arrive at sleep science from a lab. He arrived from a dorm room, overworked and underslept, studying health systems engineering at Northwestern University and wondering why being exhausted felt like a personality trait among ambitious students. He later added a master's in engineering design and innovation. Somewhere in there he met Leon Sasson, who was stacking a computer science and industrial engineering degree at the same school.
Together they did something most wellness startups skip: they published. Kahn and Sasson were the first to put out peer-reviewed research on technology-enabled sleep behavior change, more than a decade ago. The company they founded in 2015 was less a pivot into health than a continuation of a thesis they'd already defended in print.
The bet was that biology beats willpower. You cannot out-hustle sleep debt, and you cannot schedule a creative breakthrough during a circadian trough by simply wanting it harder. If that's true, then the most valuable thing an app can do is tell you the truth about your own clock - and then help you build your day around it instead of against it.
"You can't out-hustle your own biology. So they built software that works with it."
// The founders' wager, paraphrasedThe Rise Science Clock
// MILESTONES, ROUGHLY TO SCALE
The company starts
Jeff Kahn (CEO) and Leon Sasson (CTO) found Rise Science out of their Northwestern research on tech-enabled sleep behavior change.
The unglamorous years
The team runs studies on sleep and real-world performance - including work with NFL teams and sales organizations - and raises a $5.5M seed round.
RISE goes to beta
The consumer app launches in beta and quickly climbs to 20,000-30,000 installs a week.
$15.5M and a public launch
Rise Science announces $15.5M total funding - a $10M Series A led by Goodwater Capital - alongside the app's full public release.
5 million users
RISE passes 5 million downloads, earns 4.7 stars, and lands on Apple's Best Apps list - still selling the same two numbers.
04 / THE PRODUCTWhat RISE actually does at 6:42 a.m.
Strip away the marketing and RISE does three concrete things. It tracks your sleep debt over a rolling window and gives you actionable steps to pay it back. It draws an energy schedule - an hour-by-hour curve of your predicted highs and lows that syncs to your calendar, so you can park the hard thinking on a peak and the email triage in a dip. And it hands you daily guidance: how long you'll be groggy this morning, when your best focus window opens, and when to start winding down tonight.
There's a quietly clever bit underneath all this. You don't need a wearable. RISE can estimate your sleep history straight from your phone, though it will happily pull richer data from Apple Health, Oura, or Fitbit if you have them. It also offers 16 science-based habits - including the famously unwelcome advice about when to stop drinking coffee.
The business model is refreshingly boring: a direct-to-consumer subscription, around $60 a year, after a free trial. No ads, no selling your sleep data to the highest bidder. Roughly fifteen cents a night to be told when you'll feel human.
"No wearable required. The most honest tracker on your phone is the phone."
// On the quiet engineering trick under the hood05 / THE PROOFThe numbers that pay the bills
Skeptics are right to ask whether any of this works, and the honest answer is that sleep self-report is messy. But the signals Rise Science can point to are not small. The company says 83% of RISE users report more energy within a week or less. The app's 4.7-star average sits on top of tens of thousands of reviews. And the research pedigree is real: the founders ran one of the largest known studies on sleep and real-world job performance, spanning the NFL and sales teams - not a sleep lab, but the messy daylight world where performance actually gets paid for.
What the argument rests on
// SELECTED RISE SCIENCE FIGURES, PUBLIC SOURCES
Bars are scaled for readability, not on a single axis - users, dollars, percentages and ratings don't share one. Figures from Rise Science and public reporting; treat the self-reported energy stat as a claim, not a clinical trial.
"They studied the NFL to learn something the rest of us could use on a Tuesday."
// On research that left the lab06 / THE MISSIONMake energy something you can plan, not pray for
The stated mission is plain: make it easy to improve your sleep and daily energy so you can reach your potential. The interesting part is what it leaves out. Rise Science isn't promising eight perfect hours or a cure for insomnia. It's promising legibility - turning the most invisible variable in your day into something you can see on a timeline and plan around.
That reframing matters. "Sleep more" is advice nobody needs and everybody ignores. "Your focus window opens at 10:15, so don't waste it on email" is a different kind of message. One is a scold. The other is a schedule. Rise Science bet the company on the difference.
"Sleep more is a scold. A focus window is a schedule. RISE sells the second one."
// The reframe at the center of it all07 / WHY IT MATTERS TOMORROWAttention is the scarce resource. They're selling timing.
Look ahead and the bet gets more interesting, not less. Wearables keep multiplying, AI keeps promising to optimize everything, and the one resource that stays stubbornly finite is human attention. You can buy more compute. You cannot buy more peak hours in a day - you can only stop wasting the ones you have.
That's the ground Rise Science is standing on. Competitors like Sleep Cycle, Oura, and Whoop are excellent at measurement. Rise Science is making a narrower, riskier bet: that the winning product isn't the one with the most sensors, but the one that tells you what to do at 10:15 on a Tuesday. Measurement is crowded. Timing is open.
So it is 6:42 a.m. again, and the phone buzzes. You owe your body two hours and eleven minutes. You'll be groggy until 7:30. Your focus window opens at 10:15. A decade ago that buzz would have been a number with no opinion. Now it's a plan. That's the whole company, sitting on your lock screen, declining to tell you that you slept well - and telling you what to do instead.
"Measurement is crowded. Timing is wide open. That's the bet."
// Where Rise Science is pointed next