Prox GTM brain

category

market profile

• text: Prox frames the offense-defense race as a cat-and-mouse cycle and positions hypersonics at scale as the way to break it.
• text: The company's stated mission is to give the United States and its allies the capacity to close capability gaps and sustain credible deterrence, which places it squarely in the US defense-industrial base.
• text: Prox pivoted into defense from B2B AI: its live careers and YC job pages still describe an earlier 'AI product specialist for manufacturers' product, and its YC launch post describes a logistics automation product, while the home page and YC directory now describe a hypersonic weapons platform. Treat the hypersonics positioning as current and the AI-era pages as legacy.

personas

• title: Weapons program manager at a prime contractor or defense innovation unit (program office / SIW PM)
  pains:

  • Existing hypersonic programs are slow, expensive, and low-volume, so they cannot close magazine-depth and attrition math for a Pacific contingency
  • Stand-in attack weapon requirements demand an affordable round that can be bought and fielded in the thousands, and current suppliers treat them as exotic one-offs
  • Air-breathing propulsion (SFRJ) is the key to low-cost long-range performance, but few suppliers can build it repeatably rather than as a science project
• title: Propulsion engineer / hypersonics technical lead at a defense program office or prime
  pains:

  • Air-breathing hypersonic propulsion cycles (ramjet, ducted rocket) are hard to design and even harder to manufacture consistently at rate
  • Existing solid rocket motor lines are optimized for ballistic trajectories, not sustained air-breathing cruise, so a new supply base is needed
  • Finding a supplier that will trade peak performance for manufacturability and unit cost discipline is rare in the hypersonics market
• title: Defense technology investor and dual-use venture scout
  pains:

  • Wants exposure to the hypersonics reindustrialization wave but needs a team with credible propulsion depth, not just renderings
  • Needs to judge whether a 3-person team can survive the valley of death between prototype ramjet static fires and a funded program of record

icp

• text: US Department of Defense components and allied defense ministries funding stand-in attack and affordable mass strike programs (for example the Navy/Air Force SIW-class efforts and AUKUS-style allied co-production).
• text: Large defense primes and integrators seeking a low-cost, high-volume ramjet-powered round to integrate onto existing air-launch platforms.
• text: US government accounts only at this stage: the company sells deterrence technology to the United States and its allies, with no commercial product line.

message pillars

• text: Scale is the product: Prox exists to produce hypersonic weapons at volume, positioning production capacity itself as the strategic capability.
• text: End the offense-defense cycle: their copy frames each existing weapon as merely provoking a counter, with hypersonics at scale as the way to settle the race.
• text: Decisive dominance through air-breathing propulsion: SFRJ (solid-fuel ducted ramjet) is presented as the enabling technology, implying longer range and lower cost per effect than rocket-only weapons.
• text: Allied deterrence framing: the mission is explicitly US-and-allies capability gaps and credible deterrence, which signals ITAR-bound defense work as their identity.

objections

• objection: A 3-person YC team cannot build ramjet-powered stand-in weapons; that takes a prime's industrial base.
  response: Their answer is focus: one propulsion cycle (SFRJ), one weapon class (stand-in attack), and repeatable production as the design constraint from day one, rather than a broad portfolio. The founders' background is mission-critical systems work (Runtime Verification deployments with NASA and Boeing among clients, per the YC page) and security infrastructure, and the company is a fresh F25 team building in the same Hawthorne aerospace corridor as SpaceX.
• objection: Hypersonics programs have a history of slow, over-budget, canceled efforts; why back this team?
  response: They argue the failure mode is treating hypersonics as exotic low-volume technology; production at scale is the central design point of their platform. That is a thesis about manufacturing economics, and it matches where the Pentagon's own stand-in attack experiments have been pushing the field.
• objection: The public site is a one-pager with no team, product, or pricing detail; is there a real company here?
  response: Yes, but deliberately minimal: it lists a founder contact email and a single positioning statement, which is common for stealth-mode defense hardware. The YC directory confirms incorporation (Prox Technologies Inc.), Hawthorne location, and an active F25 company, so the substance is behind NDA'd conversations.

competitors

• name: Castelion
  website: https://castelion.com
  why: Most direct comp: YC-backed, building the Blackbeard hypersonic strike weapon explicitly for affordable mass production, and has moved into production with a U.S. Navy order valued up to $200 million (announced on their news page). Prox's hypersonics-at-scale thesis is the same market Castelion is already winning.
• name: Northrop Grumman
  website: https://www.northropgrumman.com
  why: Incumbent maker of the AGM-158E/F stand-in attack weapon for the Air Force; the program-of-record competitor whose cost structure and production rate Prox's affordable-mass positioning attacks.
• name: Lockheed Martin
  website: https://www.lockheedmartin.com
  why: Makes the JASSM/LRASM family of standoff cruise missiles, the incumbent air-launched strike rounds a stand-in attack platform displaces or complements; verified via their JASSM product page.
• name: Hermeus
  website: https://www.hermeus.com
  why: High-Mach air-breathing propulsion company chasing the same air-breathing hypersonics talent and industrial base; their positioning reclaims rapid iterative development of high-Mach aircraft.
• name: Anduril
  website: https://www.anduril.com
  why: The template for the software-defined, mass-produced weapons thesis (Barracuda family) that Prox's affordable scale narrative is modeled on; also competes for the same program offices and talent.

influencers

• name: Dima Yanovsky
  url: https://x.com/yanovskyd
  why: Co-founder (MIT '25, ex-Pulley, MIT CSAIL robotics); his X account is the company's public face for launch content.
• name: Gregory Makodzeba
  url: https://www.x.com/youfelll
  why: Co-founder (ex-Runtime Verification deployments with NASA and Boeing among clients, founded Rektoff, co-founded Defence Tech Community); credible voice in the defense-tech founder community.
• name: Harj Taggar
  why: Y Combinator partner for Prox's F25 batch per the YC company page; the vouching voice most likely to open program-office and investor doors.

keywords

• stand-in attack weapon
• solid-fuel ducted ramjet
• SFRJ propulsion
• affordable hypersonic weapons
• air-breathing hypersonic missile
• hypersonic strike at scale
• mass production standoff weapons
• low cost hypersonic munitions

voice

• Geopolitical and declarative (cat-and-mouse race, decisive dominance, the West's ultimate equalizer)
• Minimal and confident; the entire site is one screen of positioning plus contact
• Production-first engineering voice: repeatable production is the recurring phrase, not speed records or test milestones

signals

• text: DoD budget lines and program-of-record milestones for stand-in attack / affordable mass strike weapons: any SIW-class OTA or production award signals the exact buying center Prox needs to be in.
• text: Prime contractors and allied ministries publishing requirements for low-cost, high-volume air-launched effects: procurement language about attritable, magazine-depth, or mass-produced munitions is a direct fit.

stack

• Next.js (site is built on _next static chunks)
• Solid-fuel ducted ramjet (SFRJ) propulsion in development (company's core technology claim)

hiring

• Founding Engineer ($220k-$240k + 0.7%-1% equity, SF in person, per useprox.com/join/founding-engineer)
• Founding Agent Strategist ($130k-$160k + 0.3%-0.7% equity, SF, per useprox.com/join/founding-agent-strategist)
• Chief of Staff ($135k + 0.35% equity, SF, per useprox.com/join/chief-of-staff)
• Engineering Intern (SF, compensation TBD, per useprox.com/careers)
• YC jobs board also lists Founding GTM Engineer ($130K-$180K), Executive Assistant and Operations, Videographer and Creative Producer, and Forward-Deployed Engineer (all SF); all postings predate the hypersonics repositioning

pricing

motion

channels

• Founder-led outreach to DoD program offices and primes
• YC network and defense-tech founder community
• X (founder accounts are the only public marketing surface)

confidence

Founders

• name: Dima Yanovsky
  title: Founder
  role: Founder
  bio: mit '25
• name: Gregory Makodzeba
  title: Founder
  role: Founder
  bio: > founded Rektoff (built security systems protecting >$100B; clients: Solana) > co-founded Defence Tech Community > Head of Deployments at Runtime Verification (among clients: NASA, Boeing)