The unglamorous middleware of decarbonization
Somewhere in America right now, an electric bus depot with 100 buses is having at least one charger fail for no announced reason. Katie Siegel built a company because that happens every single day.
Most founders pitching climate want to sell you the dream - the sleek truck, the solar canopy, the graph that bends toward zero. Siegel sells the part nobody photographs: the dashboard that tells a fleet manager which of their chargers quietly died overnight, why electricity costs spiked at 6pm, and whether the depot is about to exceed the site capacity and trip the whole operation. Flipturn, the New York company she co-founded in 2022 and runs as CEO, calls itself the control center for electric fleet and charger operations. In plainer terms: it is the software that keeps the plug honest.
She arrived here the long way, which is to say the engineer's way. Siegel earned a bachelor's and a master's in computer science from MIT, and her first listed job was building iOS apps at the MIT Media Lab in 2012. Then came the rite-of-passage internships - Square, Dropbox, MemSQL - back when those were bets rather than brand names. In 2016 she joined Samsara as one of its first dozen engineers and stayed for the part that matters: the climb from scrappy startup to a December 2021 IPO on the NYSE. Along the way she led engineering for hardware launches including dash cameras and an on-site camera line. Hardware that has to survive a truck cab teaches you a particular humility about the gap between a demo and the field.
"Transportation is the most polluting sector of the US economy."
- Katie Siegel, on why she started with the plug
There was a detour, and a good one. In 2017 she co-founded Impira, a machine-learning startup that was later acquired by Figma. The acquisition is the kind of line that opens doors, but it is not the line she leads with. What she took from it was operating muscle - the difference between writing the code and owning the company that ships it.
Why charging, and why now
When Siegel went looking for a climate problem inside her own expertise, fleet transportation was the obvious field and electrification the obvious lever. The non-obvious insight came from talking to the people who run the trucks. Managing EV charging at scale was a competency that simply did not exist yet - fleet operators had spent decades thinking about diesel and routes, never about transformers, demand charges, or whether a charger would answer the phone at midnight. The trucks were the easy part. The charging was the swamp.
Dead by morning
Chargers fail unpredictably. A bus that should be at 100% shows up at 40, and a route quietly collapses.
Paying too much
Without power control, fleets overpay for electricity. Shift the load, dodge the peak, and the bill drops.
Blowing the cap
Charge 100 trucks at once and you can exceed site capacity - and wait one to three years for a utility upgrade.
Flipturn's software wires together three things that historically never spoke: the on-site charging hardware, the fleet-management system, and the distributed energy resources behind the meter. The result is real-time visibility into charger health, smarter use of electricity, and the kind of early coordination with utilities that a diesel operator never had to think about. The pitch is operational, not aspirational, and that is the point.
Consider the timing problem alone. A utility upgrade to deliver more power to a depot can take one to three years - longer than most procurement cycles, longer than some leases. A fleet that decides in January to electrify by spring is not late; it is years late, and nobody told them. Flipturn's job is partly software and partly clairvoyance: seeing the capacity wall before a fleet drives into it, then squeezing more out of the existing connection through load balancing so the upgrade can wait. For a fleet manager who spent a career thinking in gallons and miles, that is an entirely new dialect, and Siegel's company is effectively teaching it.
The fleet case is also where the economics get interesting. A person charging one car at home has almost no room to be clever. A depot charging a hundred trucks overnight has enormous room - it can shift load away from expensive peak hours, lean on cheaper or cleaner power when it is available, and avoid the demand charges that punish everyone who plugs in at the worst moment. The savings are not a rounding error; they are the difference between an electric fleet that pencils out and one that does not. Siegel is selling a spreadsheet that closes, and the climate benefit rides along inside it.
"People have really been moving much more than one would expect from the doom and gloom."
- Katie Siegel, on the pace of fleet electrification
It is a notably un-evangelical posture for a climate founder. Siegel does not wave away the hard parts - the multi-year grid upgrades, the uncertain role of hydrogen, the genuine friction of changing how a hundred-year-old industry fuels itself. She just thinks the field is moving faster than the headlines admit, and she would rather build the boring layer that makes the movement stick than narrate the apocalypse.
The team, and the dogs
She did not do it alone. Her co-founder and CTO is Sashko Stubailo, a former senior engineering manager at Stripe who led teams shipping products that handled billions in transactions. The two met at MIT more than a decade ago and stayed close - close enough that their dogs are siblings. CRV's investors, who led the Series A, singled out the team's habit of shipping products quickly and bending to what customers actually need, an advantage against larger, slower competitors. Coming from a firm whose job is to be skeptical, that reads less like a compliment and more like a thesis.
The customer roster does the rest of the talking. For an early-stage company, the names are unusually heavy: the City of Seattle, Purolator, Republic Services, Swift Transportation, TITAN Freight Systems, and Zeem Solutions. Seattle's fleet director put it plainly - Flipturn marries vehicle data and charger data into a single view of the charging ecosystem. That is the whole product in one sentence, which is probably why a procurement-bound city government signed on.
There is a reason she can talk about all of this without flinching at the hardware. Those years leading dash-camera and on-site-camera launches at Samsara were a long apprenticeship in the messiness of the physical world - devices that ship to thousands of trucks, fail in ways no test rig predicted, and have to be debugged from a thousand miles away. Chargers are the same genre of problem: industrial equipment from many vendors, in many states of repair, reporting in many half-broken dialects. Most software founders would run from a category that hardware-agnostic. Siegel walked toward it, because she already knew the shape of the pain.
The through-line
Trace her resume and a pattern shows up. The iOS intern who became an early engineer at the company that defined fleet IoT. The founder who sold to Figma and went back to ship more hardware. The CEO who picked, of all things, charging middleware. Every time there is a glamorous option and an unglamorous-but-load-bearing one, she takes the load-bearing one. She still keeps 35 public repos on GitHub, where her bio is a four-word shrug: "CEO @ Flipturn | MIT alum." She helped organize HackMIT 2014 and wrote about what it takes to run the thing rather than just attend it. The texture is consistent: build the part that holds the weight, skip the part that takes the photo.
Flipturn has raised roughly $26.5 million - a $4.5M seed led by Accel in 2023, and the $11M Series A led by CRV with Accel returning in late 2024 - and the money is pointed at the unsexy work of scaling go-to-market and engineering. No moonshot language. Just more chargers, watched more closely, in more depots. If electrifying the most polluting sector of the economy comes down to whether the bus is charged when the driver clocks in, Katie Siegel is betting the whole thing on the boring, decisive yes.