🚀 We just launched a new newsletter — Company Launch Tracker.
We’re tracking company launches as they happen and surfacing the most interesting new founders and startups (yes, all outside of this stealth activity too). If you want to stay ahead of the curve, this is where you’ll find them first.
Right now we’ve got 5 subscribers: my wife, my mom, and that high school buddy who won’t stop pitching me his app. Be smart like them and get in early 👇
Subscribe to Company Launch Tracker
We run a live feed inside Gravity that tracks founders entering stealth and companies quietly exiting it.
What you’re reading here is about 1% of the stealth activity we pick up. The full tracker updates in real time as things change and new activity emerges.
If you want earlier access to everything, book some time with us to stay ahead.
In this issue of the Stealth Startup Spy, here is what we will uncover:
This fusion energy PhD, co-founder of Kyoto Fusioneering, is now developing the world’s first isotope refinery
Former Head of Product at Nubank, who also led product at Stripe and Google, has entered stealth
Ex-Director of Engineering at HubSpot launches an AI-native CRM that acts instead of just tracking
After leading Meta’s AI Accelerators team and Google’s TPU hardware group, this founder has entered stealth
A former Senior Staff Roboticist at Boston Dynamics is building a new AI-driven robotics venture backed by YC
And more…
Now let’s shine the spotlight… 💡💡💡
Real-time updates from founders who debut what they’ve been working on under stealth mode
🔎 Featured Founder under stealth mode in StealthStartSpy#319
FounderDNA: Serial Founder, Technical Founder, Doctorate Degree, Masters Degree, Top 10 University
Prior Experience: Co-Founder & Chief Innovator at Kyoto Fusioneering, Master’s Degree at Imperial College London, Editor-in-Chief - Journal of Fusion Energy at Springer Publishing, Assistant Professor (Visiting) at Eindhoven University of Technology
StandardX builds the world’s first isotope refinery, a proprietary machine that produces isotopes across the full portfolio at scale and closer to where they’re needed than existing infrastructure.
HQ: London, England, United Kingdom
Industry: Nuclear Technology, Advanced Materials | Team Size: 10
Time Spent in Stealth Mode: 12 Months
FounderDNA: Technical Founder, Masters Degree, Top 10 University
Prior Experience: Product Manager at Uber, Harvard MBA, MIT alum
Demi is a proactive AI assistant that works natively inside Slack, connecting to a team’s existing tools to triage inboxes, compile reports, prepare briefs, and send follow-ups autonomously, with user-defined rules for what it handles on its own.
HQ: San Francisco, California, United States
Industry: Artificial Intelligence, Workplace Automation | Team Size: 4
Time Spent in Stealth Mode: 7 Months
🔎 Featured Founder under stealth mode in StealthStartSpy#298
FounderDNA: Serial Founder, Technical Founder, Top 10 University
Prior Experience: Director of Engineering at HubSpot, CTO & Founder at Fullstack.cc, Co-Founder at TopHat.ie, Software Engineer at Disruptive Developments
Ahoy is an AI-native CRM for founder-led sales teams that connects to a founder’s existing workflow to draft follow-ups, assemble meeting briefs, and keep pipelines current automatically.
HQ: San Francisco, California, United States
Industry: Artificial Intelligence, Sales Tech
Time Spent in Stealth Mode: 9 Months
FounderDNA: Serial Founder, Technical Founder, Doctorate Degree, Masters Degree, Top 10 University
Prior Experience: Senior Staff Roboticist at Boston Dynamics, Founder & CEO at GenZArt, Principal Robotics Engineer at Rethink Robotics, PhD at University of Illinois at Urbana-Champaign
Shiraz AI is an early-stage robotics and AI company based in the United States; further product details have not yet been publicly disclosed.
HQ: Boston, Massachusetts, United States
Industry: Robotics, Artificial Intelligence | Team Size: 2
Time Spent in Stealth Mode: 7 Months
FounderDNA: Serial Founder, Technical Founder, Masters Degree, Former FAANG, Prior Exit
Prior Experience: Software Engineering Manager at Google, Director of Engineering (Quest Software) at Dell, Director of Engineering at Splunk
Connect on: LinkedIn
Tracemill verifies that production SIEM detections actually fire, injecting schema-faithful synthetic events into the security pipeline and returning per-rule verdicts that localize failures to the ingest or detection layer.
HQ: San Francisco, California, United States
Industry: Cybersecurity, Observability
Time Spent in Stealth Mode: 6 Months
Illuminating clues left behind by world class talent and influential innovators who just went into stealth mode
Building AI-native products for professional creatives.
FounderDNA: Technical Founder, Masters Degree, Former FAANG, Top 10 University
Prior Experience: VP and General Masnager, Digital Ecosystem & Head of Product Function at Nubank, Chief Product Officer at Kueski, Product Lead (Latin America) at Stripe, Director of Product Management - Advertising Platforms & Google Cloud Platform at Google
Connect on: LinkedIn
HQ: Los Altos, California, United States
Time Spent in Stealth Mode: 1 Month
FounderDNA: Top 10 University
Prior Experience: Applied AI at OpenAI, Venture Scout at Andreessen Horowitz, Mentor at Neo
Connect on: LinkedIn
HQ: San Francisco, California, United States
Time Spent in Stealth Mode: 3 Months
FounderDNA: Doctorate Degree, Masters Degree
Prior Experience: Head of AI at Goodnotes, Principal Applied Science Manager at Microsoft, Associate, Market Risk Modelling at Goldman Sachs
Connect on: LinkedIn
HQ: Serbia
Time Spent in Stealth Mode: 1 Month
FounderDNA: Serial Founder, Technical Founder
Prior Experience: CEO at PhonePe Insurance Broking Services, VP (Product, UX/UI, Risk, CX) at PhonePe, Director - Product Management, Payments and Transactions at Flipkart.com, VP-Technology at Pinelabs
Connect on: LinkedIn
HQ: India
Time Spent in Stealth Mode: 1 Month
FounderDNA: Technical Founder, Masters Degree, Former FAANG, Top 10 University
Prior Experience: Director - AI Accelerators at Meta, Technical Lead/Manager - TPU HW Design at Google, Sr. ASIC Design Engineer at NVIDIA
Connect on: LinkedIn
HQ: San Francisco, California, United States
Time Spent in Stealth Mode: 1 Month
🚨Here’s the deal🚨This email has gotten too big. Exciting, but with more people following it, the edge diminishes. I’ve thought long and hard about what to do to preserve the value in the signals. I’m not sure about the final direction yet, but in the meantime I’ve been sending an email 48 hours earlier to a select group of paid subscribers. The feedback has been pretty positive so I’m going to open up the list for another 100 spots. To get signals early, Apply here!
Stay Stealthy,
Drake
Thank you for reading. If you liked it, share it with your friends, colleagues and everyone interested in staying ahead of the hidden developments in tech. Subscribe below and follow us on X / Twitter to never miss a company operating under stealth again.
Stealth Startup Spy is a data-driven newsletter for investors, journalists and tech enthusiasts interested in uncovering the next big move for key talent, real-time stealth company launches and technology advancements not in plain sight. We leverage the technology built at Gravity to shine a light on the hidden world of stealth startups.
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