
Founder @antiochrobotics — we’re enabling the agentic development of autonomy. Formerly CTO @TransposeData (acq. by @Chainalysis), @Tesla AI, @stanford.
Manhattan, NY
Joined March 2020
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I’m proud to announce that Antioch has raised $32 million in Series A funding, led by @GreylockVC with participation from @A_StarVC, @Category_VC, @BoxGroup, @IcehouseVenture, and angels.
Physical AI is the defining technological and economic opportunity of our lifetime. Rapid advancements in intelligence and compute have brought us right to the precipice of this new era. What’s holding the industry back is development speed — iteration is hardware-bound, testing is slow and costly, and data is scarce.
We founded Antioch with the belief that scaled, high-fidelity simulation is the solution, and will push us into the physical AI age. Autonomy teams use Antioch to accelerate development, test and validate their systems at scale, and generate massive quantities of synthetic training data.
We’ve seen the development velocity that Antioch brings to advanced manufacturing, humanoid robotics, smart security, model training, and more. Now, we’re scaling rapidly to put Antioch in the hands of every autonomy team.
Thank you to the wonderful customers, investors, partners, friends, and family who are on this journey with us.
Read about what we’re building in @Forbes (link in first reply) and tune into @tbpn today at 3:35pm ET to hear more.
We’re hiring across simulation, infrastructure, machine learning, 3D graphics, go-to-market, and operations.
normalize important wake-up calls using lord of the rings metaphors
Are we ready? Are we serious?
This is an undeclared emergency. You thought you were still inside the secure bastion of the king’s castle. You have awoken in Helm’s Deep. The orc armies are coming.
Cathedral’s AI agents were inside Anthropic’s most sensitive model Slack channels in under 12 hours. Frontier AI is dual-use national power. Agent-speed offense has already outrun static defenses and private channels.
Build the post-AI secure bastion. Move what you can into it. Harden the crown jewels.
But deterrence is not restored by better walls alone. It is restored by American builders who can see the battlefield, operate at machine speed, and project both defense and offense.
Bat signal for the Heretics.
Replying to @kevin_zakka
@kevin_zakka is one of my favorite voices in the robotics sim world, and i loved his take on this in mujoco -- so i thought i'd give the @Tesla roadster launch video to @antiochrobotics's real2sim pipeline. results are pretty sweet.
all automated end-to-end, took about 15 minutes to recreate from the livestream video.
car runs a full mocked control policy over ROS, thrusters + suction all modelled, etc. smoke needs some work clearly, we'll get that fixed :)
The @Tesla Roadster stunts, simulated in MuJoCo! Thrusters are site actuators, the ramp suction uses adhesion actuators, and the builtin box QP decides how hard to fire each jet.
the extra cool thing is that this allows you to ask 'what if'. for example, what if the front right thruster failed?
turns out, not great things. luckily @elonmusk knows how to hire the best in the business :)
Harry Mellsop retweeted
Reporting live from Long Horizon 2026!
Stop by the Antioch to see how teams use Antioch to build, test, and validate their physical AI systems before deployment.
And in honor of Halloween approaching, we may or many not have a few fun treats at the booth 🎃
Harry Mellsop retweeted
Kicking off Long Horizon with @antiochrobotics.
Antioch tests robots in sim before they ship. Alloy finds what went wrong once they're in the field. Come argue which is harder, over drinks.
Monday, Oct 19, 6:30pm, Marina district, SF
Request a spot: luma.com/9urv7cgb
Harry Mellsop retweeted
in sf for long horizon? come kick it off with us and @antiochrobotics monday night
sim people and field data people in one room. should be a good argument
Harry Mellsop retweeted
We’re counting down the days to @encord_team's Long Horizon!
Excited to share that we’re teaming up with @AlloyRobotics next Monday to kick off Long Horizon.
Calling all robotics and physical AI leaders 🗣️ 🗣️ 🗣️ Join us for an evening of great conversation and good company
There’s still plenty of time to register! RSVP here: luma.com/9urv7cgb
Woohoo! Couldn't be more excited to have Zaima join the team!
We're thrilled to announce that Zaima Alam has joined Antioch as a Member of Operational Staff.
Zaima joins us from the global industrials IB group at Goldman Sachs. She has worked on a range of strategic transactions spanning the automotive and industrial technology sectors, across products including M&A, financing and corporate advisory.
Before Goldman, Zaima worked at PayPal and Vital Voices (a women's empowerment organization founded by the U.S. State Department) where she worked in tech operations and social impact partnerships.
Originally from Texas, Zaima received her Bachelor's degree from the University of Texas at Austin, where she studied International Relations (Hook ‘Em Horns!) and her MBA from NYU Stern School of Business, where she specialized in finance and strategy.
Outside of work, Zaima is an improv enthusiast, Solidcore addict, and always has her finger on the pulse of news, markets, and entertainment. We're so excited to have her grit, wit and creativity on the team.
Welcome aboard, Zaima!
Harry Mellsop retweeted
calling it now - the RL market for robotics will be 10x the size of the LLM RL market
there’s simply way more to hillclimb in the physical world and exponentially more surface area for economic ROI
The winning robotics data business has a much higher terminal value than investors are underwriting today.
Robotics will be a long race with many twists and turns, but when the ChatGPT moment hits, the winning data player will be in a very strong strategic position to capture token value. They will have large revenue, a strong balance sheet, talent density, deployments experience, and hardware supply chain knowledge. When it comes time to blitzscale they will be amongst the players that can capture the most value.
The reason this is misunderstood today is because most people are using traditional LLM data businesses as a prior for robotics data businesses and what their terminal value could be. I posit this is incorrect framing. Because the model and harness are integrated in LLMs, there is very little room for data players to play meaningfully in the token value flow in the long term.
In robotics this is exactly the opposite, the model and harness (hardware) are separate, the pretraining era is just beginning, there are many more dependencies on distributors/deployers, and there is a large surface area for other players than just models to capture value. Open source will also play a larger role earlier in the robotics race, as all prior LLM learnings will be incorporated as the race is run. This also creates opportunities for long term infrastructure players.
There is a massive amount of terminal value in winning robotics data and participating in the path of the industry from a position of strength.
From first principles:
The endgame of robotics will take place over the next decade. Empirically, today, no player has enough data, enough model intelligence, or sufficient hardware to facilitate a fast revenue takeoff in the field. No player has reasoned through the right sales motion either, which can take years to develop pilots and move to production. Serious players are correctly focused on scaling up pretraining/deep learning vs. who has the best model, deployment, or hardware today.
The robotics data business takes participants on a global hunt to build data, supply chains, and hardware. Along the way it also teaches deployment and deep knowledge of SOTA model development. Winning data participants also get the first crack at the still nascent robotics RL market, which will likely be the next large revenue stream after pretraining. As they compete to win data, data players must develop incredible talent density across both Asia and the US. The winning data business will have both Asian and North American DNA. Canada 🇨🇦 encompasses an interesting cultural mixture of both of these parts of the world. Bullish Canadian Robotics Mafias, more specifically Waterloo/Toronto.
So:
What would constitute a strong strategic position to capture value once the ChatGPT moment of robotics hits? You need a large revenue base, a strong balance sheet, and talent density + experience across data, deployments, hardware, supply chain, and RL. The hyperscalers, the frontier labs, and the winning data player all qualify.
Anyone under time pressure in what will be a long race is in a weaker strategic position in my view. Given the costs of integrated hardware+software+deployment, this would actually be most robotics-native players. They will depend on VC interest, which can be fickle.
Harry Mellsop retweeted
There’s nothing more energizing than being in a room full of industry leaders building the future of physical AI.
The Antioch team cordially invites you to kick off @encord_team's Long Horizon conference next Monday in San Francisco.
Join us for an evening of drinks, small bites, and great conversation.
🗓️ Monday, October 19 | 6:30–9:30 PM
📍 Marina District, SF
🌟 Space is limited. RSVP here: luma.com/9urv7cgb
Harry Mellsop retweeted
State of Physical AI right now:
1. Capital is pouring in. Startups are coming out of stealth and raising hundreds of millions.
2. We’re moving from demos → deployments. Reliability, uptime and actual ROI are starting to matter more than flashy demos.
3. Specialized robots will likely find PMF much sooner than general-purpose robots. We’re already seeing them deployed across agriculture, factories, mining and industrial inspection with companies like @carbonrobotics, @PathRobotics, @maticrobots and @GeckoRobotics.
4. Physical agents feel like the next frontier. Not just completing a single task, but owning entire physical workflows. @DynaRobotics is doing some really interesting work here.
5. Robot design is getting much more interesting. Form factor should follow the job, not necessarily the human body. Really like dyna's Taku design here.
6. Simulation + evals are becoming a critical part of the stack. Testing, validating and iterating on real hardware is slow and expensive, while measuring real-world reliability is still largely unsolved. Companies like @antiochrobotics are working on this layer.
7. Physical AI is an incredibly difficult industry. Models, hardware, simulation, evals, manufacturing and deployment all need to work together before we see robots operating reliably at scale.
Still early, but feels like we’re entering the most interesting phase of robotics yet.
Industrial automation is quickly becoming one of our biggest growth areas, as well one of the biggest immediate-term opportunities for robotics. so, we were stoked to join @nvidia and @tulipinterfaces this week with many of the world’s leaders in this space at Operations Calling! Onwards!
Highlight from @tulipinterfaces #OperationsCalling2026: Spot paying his digital twin at the Antioch booth a visit and subsequently challenging the team to a squat contest!
(Yes, we got it on video.)
Coming out of Operations Calling, we're feeling more energized than ever about the future of physical AI, and how autonomous systems are set to transform factory operations.
Thanks to everyone who stopped by! Looking forward to more conversations and showing what's possible in sim with Antioch.
Harry Mellsop retweeted
There is more intersection in these than people realize
- data
- eval
- deployment
- sim
You don’t have to be a neo lab to change the world
running some experiments benchmarking opus vs. fable vs. astra in real2sim2real. pleased to report fable is now considering the impacts of the earth's oblate nature. incredible stuff, results to follow.
Harry Mellsop retweeted
We had such a great time at Operations Calling Day 1 here in Somerville, MA! Big thanks to @nvidia and @tulipinterfaces for hosting us.
Our team is back in full force for Day 2. Stop by to chat all things sim, robotics, and physical AI!
#OperationsCalling2026
Harry Mellsop retweeted
Feels like every week in robotics there’s a new ‘this is the GPT-3 moment for robotics 🤖’ announcement.
We brought on @GeneralistAI CEO & Co-Founder @peteflorence on @GreylockVC Change Agents to dig into what’s going on at the frontier of robotics models.
We covered the company’s latest Gen 1.5 model, few-shot learning, training robots on different embodiments, and the milestones towards a more generalized physical model.
Timestamps:
00:51 The inception of Generalist
04:13 Long-term goal of the company
05:47 Parallels and differences between robotics and language models
12:05 Key differentiation in 1.5 Gen model
12:48 Robot vs banana
14:49 Emergent capabilities not explicitly trained for
17:13 Cross-embodiment and the importance of hands
22:26 Research vs working with customers
24:58 Beyond VLA vs world model
28:50 Future-looking milestones
Some of the top takeaways:
- One-shot and few-shot learning emerged without being trained for. Gen 1.5 can learn a new task from a single demonstration, and Pete compares it to the GPT-3 moment in language. In one example, a robot taught to sweep a cube into a bowl with a brush used a banana instead. Given a dustpan, it held the pan with one hand, swept with the other, then tipped the cube into the bowl. Neither behavior was explicitly trained, and Pete sees this as a signal of where the model's generalization is headed.
-Generalizing to new hands remains a challenging problem for cross-embodiment. Physical hardware doesn’t stay static, and so cross-embodiment - the ability of a physical AI model to adapt to different hardware systems - is vital for success.
-Customer deployments are a valuable source of research inputs. Generalist actively partners with their customers for feedback, which they use to inform their research and make real-world evaluations.
-Generalist doesn't think in terms of "VLA vs. world model." Pete helped create early VLAs and has worked on world models, but he argues the goals matter more than the label, and the team is trained to think in a first-principled way when considering new research directions.
Watch the full episode at the link in the comments. Thank you to @peteflorence for joining us!
Harry Mellsop retweeted
In robotics, the road from pre-trained model to deployable stack can be long. Fine-tuning, testing, validating and iterating on shared hardware are often slow and laborious.
At Antioch, we’re bringing that process into fast, scalable simulation. We’re building model benchmarks that let you compare different models, track progress precisely, and guard against regressions.
If you’re developing robotics models, let’s chat.
Harry Mellsop retweeted
Antioch is going to @tulipinterfaces Operations Calling outside Boston, tomorrow and Wednesday.
Exponential progress in robotics and automation are presenting an enormous opportunity for frontline operations. Operations Calling will gather leaders from across industries to discuss the future of the space.
Come visit the Antioch booth for demos and conversation about advancing autonomous robotics using simulation.
Link to last-minute tickets in the first reply.





















