John Ferrara

cofounder and ceo of Juxta | track anywhere on earth without gps, beacons, or cameras | yc s25

[John Ferrara @byjohnf]

What if GPS could track indoors, underground, and outdoors?

and what if it worked without needing any external hardware, like satellites or beacons?

and what if it was unjammable, on-device, and offline-capable?

that's what we're building at Juxta — now backed by @ycombinator

[John Ferrara @byjohnf]

@JulianAndreone Appreciate his LeBron glaze. But it pales in comparison to the fact that if he could, he’d banish Lamar to the gulag for the rest of his life.

[John Ferrara @byjohnf]

@JulianAndreone waymos reduce serious crashes by 92% and are vastly safer+more liked by riders than crazy uber/lyft drivers

[John Ferrara @byjohnf]

@JulianAndreone agree, we should also all call out steyer for spending $145 *million* of his hedge fund and private equity money

[John Ferrara @byjohnf]

@JulianAndreone

[John Ferrara @byjohnf]

@JulianAndreone Mogging

[John Ferrara @byjohnf]

@Whatdidyousay82 @JulianAndreone @DropSiteNews @lily_efranks @PabloReports @prem_thakker @MattLaslo hope you enjoyed your DEI mvp 👍

[John Ferrara @byjohnf]

@Whatdidyousay82 @JulianAndreone @DropSiteNews @lily_efranks @PabloReports @prem_thakker @MattLaslo more typos in this tweet than bills superbowls

[John Ferrara @byjohnf]

@JulianAndreone Goated

[John Ferrara @byjohnf]

@amm_chino @JulianAndreone You must live in a very interesting part of California

[John Ferrara @byjohnf]

@MaxXWilliamson @saranormous Thanks for thinking of us! We don’t do drones as much, mostly work on tracking assets/equipment/personnel/etc just using IMU

[John Ferrara @byjohnf]

@JulianAndreone @TomerAzarly Nobody on the clippers is taking a charge like goat luka. Big difference.

[John Ferrara @byjohnf]

@JulianAndreone @JoeyB Best tweet of yours

[auntie Cie. @cienice_]

Tyler Loop is a first ballot HOF Raven.

[John Ferrara @byjohnf]

@CookedByLJ8 when you'd see this or the harbaugh face on the sideline you knew we're done

[John Ferrara @byjohnf]

@Celesteamadon 🐐

[Gabriel Jarrosson @GJarrosson]

YC founders notice who asks early and who doesn’t.

John (@byjohnf) of Juxta didn’t fully believe investors really talked to each other. Then fundraising started.

Once a few checks came in, the strongest investors reached out fast and pulled meetings forward.

That wasn’t random. The most proactive investors were also the highest-rated ones. Foresight is part of the job.

[Gabriel Jarrosson @GJarrosson]

Indoors is the real world, and GPS barely works there.

Most of the world’s movement doesn’t happen in open skies. It happens indoors, underground, and inside dense cities.

GPS struggles there because the signal hitting Earth is tiny and candle-flame weak, so it can’t penetrate walls or rubble.

John Ferrara (@byjohnf) of Juxta wants to democratize location in those spaces, so tracking and forecasting works where it actually matters.

[Gabriel Jarrosson @GJarrosson]

90% of human movement is invisible to GPS.

That’s not a fun fact. It’s a trillion-dollar blind spot.

Juxta is a no-hardware GPS alternative that works indoors, underground, in warehouses, and in war zones.

While most founders chase ARR, others chase impossible problems.

YC S25 solo founder, John Ferrara (@byjohnf) chose the second path, building a GPS alternative for places GPS can’t reach.

In this episode, we break down:
• why GPS is basically a candle flame
• real traction in logistics + defense
• raising $5M at a $40M cap in ~48 hours
• what YC is really like as a deep-tech solo founder

🎥 Watch the full episode here: https://t.co/TWLbrkOV3d