Clinton D Antony

Co-founder & CTO @CatalyxSpace | Hf0 W25 | F Inc | Engineering the world’s best Reentry Systems.

[Clinton D Antony @clinton_atspace]

It all started when I was 16.

I was watching a cartoon, Kid vs Kat. when I stumbled episode about model rocketry. That random moment changed everything.

I fell in love with internal ballistics, started building my own rocket engines and spent most of my years learning from Richard Nakka’s writings, building rocket motors in my teens and later studied aerospace engineering.

After graduation, I co-founded Catalyx Space, where we built a custom 0.5U spacecraft and build the world’s lightest satellite separation system for 3U-class spacecraft, creating a new deployment architecture we call the Non-Canisterized Deployment Standard.

We got into Techstars, Founders, Inc. raised and $1.7M pre-seed kept building relentlessly.

Within 6 months of our Pre-seed round we completed a high-altitude drop test with just ~7% of the budget of comparable re-entry programs.

Today, I’m thrilled to share that Catalyx Space has just closed a $5.4M seed round, bringing our total funding to $7.1M.

Huge thanks to @outlandervc , with participation from; @ArkaVentureLabs , Lex readdy , KDX Management LLC, @scaletogether, Higher Life Ventures, @NiveshaVentures , Prana Tech Ventures, Bria fund, @hf0 , @Techstars for believing in our vision.

Amazing job by @riftron_ , @niharikanaveen , and @heysaqh, who drove this round to close in record time. And above all, gratitude to our customers and the entire Catalyx team, none of this happens without you.

With this new capital, we’re ready to accelerate:

1. Advancing our next-gen ultra low ballistic coefficient re-entry systems.
2. Expanding our spacecraft bus platforms and ground-station infrastructure.
3. Establishing a new manufacturing facility in India and growing our team by 40+ talented engineers scaling from a 4-person core to 14 specialised departments.
4. Executing a pipeline of upcoming test-bed missions.
5. Developing an entirely new re-entry system architecture, something we’ve been quietly testing that could change how spacecraft come home.

Downmass capability is the final piece of the puzzle connecting space and the global economy. It will allow us to commercially harness the true value of LEO.
@ChandKeerthan @heysaqh @niharikanaveen @thaneeeem @Mohamediliyas_ @PavanB71486 @UchitModi @chitta_pavan @nssdatta @Asifoff7 @MhmdMuzamil

[Rifath Shaarook @riftron_]

Funding Announcement: @catalyxspace has raised a $5.4M seed round to build the complete back-end infrastructure for space — enabling both upmass and downmass for the next era of orbital logistics. This brings our total funding to $7.1 million.

Exactly one year ago, my friend @heysaqh and I left everything behind in India and arrived at LAX, hoping to build our new space company in the U.S. Meanwhile, our friends @clinton_atspace and @ChandKeerthan focused on developing spacecraft hardware back home in India.

We joined the @techstars space accelerator and later @hf0 , raising a $1.7M pre-seed round in December 2024 from HF0 and @fdotinc, before moving to San Francisco — the city I love most.

The entire team relocated to SF in January for HF0. Since then, we’ve 5X’d our revenue, built a re-entry capsule, launched our first spacecraft, and completed our drop and landing tests.

We’ve grown to a 20-person team and begun constructing a new spacecraft manufacturing facility in India.

Today, we’re thrilled to announce our $5.4M seed round, led by @outlandervc , with participation from @ArkaVentureLabs, Lex Reddy, KDX, @scaletogether,
Higher Life Ventures, @NiveshaVentures, Pranatech, Bria, @hf0 and @Techstars.

Thanks to the Almighty for everything and everyone who has believed in us.

This round will help us demonstrate our next-generation re-entry and landing technology, scale our GTM, and execute upcoming missions.

Multiple missions are already lined up — each bringing us closer to making orbital logistics as seamless as air cargo.

We’re not just launching satellites — we’re building the operating system for space logistics.

Time to get back to building, testing, and launching.

The future of space isn’t one-way.

Upmass. Downmass. Infinite possibilities.

[Clinton D Antony @clinton_atspace]

FAA filings: https://t.co/bS13kVCqdb

[Clinton D Antony @clinton_atspace]

The birth of point to point delivery of critical cargo through space is here.

SpaceX just validated the entire reentry logistics market with Starfall. I've been following Starfall for quite a long time and I was waiting for this update.Happy to see @catalyxspace named in @SpaceNews_Inc alongside the companies building this future.

But here's what's different about us, we're not building a capsule. Not a space plane. Our deceleration architecture is so novel, Something the market hasn't seen before. While everyone else is chasing kilograms, we're designed for tons of cargo return. At catalyx space we believe space is not one way, it's both up and down. what we're about to announce couldn't be better timed. Update soon.

Link to Article : https://t.co/r5twfRwBxk

Also read the full FAA filing. Interesting stuff in there.

[Clinton D Antony @clinton_atspace]

Happy Holi from Team @catalyxspace

[Clinton D Antony @clinton_atspace]

It was loud. The rose didn’t stand a chance. (No plants were harmed. Professional rose. Paid actor 🤣 )
More updates soon!

[Rifath Shaarook @riftron_]

Anti-Valentine update nobody asked for.
Shipped anyway.

Next big thing: April 2026.

Can’t say what it is (yet).
But you’ll want to see it.

Want in early → join the waitlist.

Link in bio.

[Clinton D Antony @clinton_atspace]

@riftron_ Another masterpiece!

[Clinton D Antony @clinton_atspace]

The Story of the Rocker Bogie Man!!

I just watched a GearSkeptic video about his dad, Donald Bickler, and I’m genuinely blown away. One of the most inspiring engineering journeys I’ve ever seen. A real GOATed engineer. I’ve always looked up to Tom Mueller from the propulsion side, but this documentary gave me an idol on the mechanical systems side, the kind of engineer who quietly solved impossible problems and literally made Mars rovers possible. This is hands down the best engineering documentary I’ve watched, packed with real technical depth, zero fluff, and narrated beautifully.
I highly recommend GearSkeptic, easily one of the very few engineering channels actually worth watching. If you’re into mechanical systems or engineering as a whole, this is a must watch.

Also, slightly unrelated but important, I’m trying to get the JPL Sojourner Mars Rover Hot Wheels Action Pack, so DM me if you’ve got any leads.

link : https://t.co/njNoYafMYq

[Clinton D Antony @clinton_atspace]

Was randomly watching some RLV videos and suddenly “Entharo Mahaanubhaavulu" banger starts playing.

credits: r/isro u/ohsin
Audio credits: Vidyasagar 😂

[Clinton D Antony @clinton_atspace]

Last year, we achieved a lot with very little space.

Now, we’re building the infrastructure to support what’s next. Catalyx’s new facility is under construction purpose built to accelerate innovation!

[Rifath Shaarook @riftron_]

Vertical integration gets thrown around a lot.
But this is what it actually looks like.

Catalyx facility. Coming soon.

[Clinton D Antony @clinton_atspace]

Here we go!

[Sawyer Merritt @SawyerMerritt]

NEWS: Today, Trump signed an executive order committing the United States to return to the Moon by 2028, build a lunar outpost by 2030 and prepare for the journey to Mars.

Everything in the Executive Order:
• Return Americans to the Moon by 2028
• Begin building a permanent lunar outpost by 2030
• Make U.S. space superiority a core national priority
• Expand commercial launch, lower costs, increase cadence
• Develop next-gen space-based missile defense by 2028
• Detect and counter threats in LEO and cislunar space
• Rapidly modernize national security space architecture
• Deepen allied cooperation in space security
• Grow the U.S. commercial space economy
• Target $50B+ in new space investment by 2028
• Support a commercial successor to the ISS by 2030
• Enable space nuclear power for lunar and orbital missions
• Improve space weather forecasting
• Lead on space traffic management & debris mitigation

[Clinton D Antony @clinton_atspace]

Today I went all the way to Vandenberg to watch a Falcon 9 launch but nature had other plans. The fog rolled in so thick that the launch was literally invisible, zero visibility. We didn’t see the rocket at all, we just heard the engine roar and the whole crowd burst out laughing. Didn’t see the launch, but definitely heard it.

[Clinton D Antony @clinton_atspace]

We are looking for Super heroes! Do apply if you have super powers.

[Rifath Shaarook @riftron_]

Superheroes have always existed.

From the first wheel to the first flight, from computers to AI, it was them all along, changing the world.

And the truth is, they still live among us.

This is our bat signal to each one of them.

It’s time to build again.

Apply at catalyx[dot]space/careers

[Clinton D Antony @clinton_atspace]

One side, @blueorigin nails the New Glenn landing on the other, we see a massive deployable heat shield entering the stage.

Blue Origin’s entry into the reentry market is a clear signal to everyone this domain is about to get big. Really surprised and excited to see what looks like a beefed-up version of NASA’s ADEPT system. @outpostspace is also working on similar tech, and it’ll be fascinating to watch how this field evolves in the coming years.

Truly exceptional groundwork by @NASA_Langley and @NASAAmes through missions like HIAD, IRVE, LOFTID, and ADEPT all of which have laid the scientific foundation for this new wave of reentry innovation. It’s a great reminder of why doing science for the sake of science matters.

[Clinton D Antony @clinton_atspace]

With Blue Origin’s successful landing, access to space just got a little cheaper.

We’re entering a phase where launch costs will rapidly drop, thanks to systems like these making reusability routine. As launch becomes a solved problem, the next big challenge for our generation of space infrastructure companies is clear, figuring out how to bring things back from space coz future of space isn’t one way.

[Keerthan Chand Aluvala @ChandKeerthan]

Back in school, I met with an accident that left me with a hairline fracture in my leg and kept me bedridden for a month.

During that time, I got my hands on my first microcontroller. For that entire month, all I did was experiment with it taking it apart, learning, and rebuilding. By the time I recovered, I had fallen in love with electronics. What started as a way to pass time soon became a deep passion for engineering, and I began spending every evening after school building small projects.

I began by writing code for drone flight computers, then built avionics for high-altitude balloons, launching six of them. By 18, I had built and launched my first onboard computer for a satellite and its ground station, and later designed avionics for five more satellites.

The growing passion for building complex space systems led to a bigger ambition. Alongside @riftron_ , @clinton_atspace, and @heysaqh, I co-founded @catalyxspace to take on challenges that few small teams could tackle. We joined @Techstars and @hf0 , and raised our first 1.7M pre-seed round to prove that a small, determined team could build advanced space systems faster and more efficiently.

In just six months, we built all subsystems in house and successfully demonstrated a high altitude drop test of our capsule, achieving full system validation in record time and budget.

While the engineering team focused on pushing boundaries, @riftron_ , @niharikanaveen, and @heysaqh led our seed round, closing it in record time.

Today, I’m happy to share that @catalyxspace has just closed a $5.4M seed round, bringing our total funding to $7.1M.

Huge thanks to @outlandervc, with participation from @ArkaVentureLabs, Lex reddy , KDX Management LLC, @scaletogether, @mrgirish, Higher Life Ventures, @NiveshaVentures, Prana Tech Ventures, Bria fund, @hf0, @Techstars for believing in our vision.

We’ve always built extraordinary systems with limited resources. With this new capital, we’re ready to accelerate:

1. Advancing our next-gen ultra low ballistic coefficient re-entry systems.
2. Expanding our spacecraft bus platforms and ground-station infrastructure.
3. Establishing a new manufacturing facility in India and growing our team by 40+ talented engineers scaling from a 4-person core to 14 specialised departments.
4. Executing a pipeline of upcoming test-bed missions.
5. Developing an entirely new re-entry system architecture, something we’ve been quietly testing that could change how spacecraft come home.

The fracture healed long ago, but it sparked something in me that grew into a million-dollar company.

I’m thankful to everyone who has been part of this journey. This wouldn’t have been possible without our team and my family’s support.

@thaneeeem @Mohamediliyas_ @PavanB71486 @UchitModi @chitta_pavan @nssdatta @Asifoff7 @MhmdMuzamil

[Clinton D Antony @clinton_atspace]

@debapratim_ Me too, one of my all time favorites! I just found the exact episode I was talking about, Episode 26, Season 1, titled “It’s a Rocketman.”

[Clinton D Antony @clinton_atspace]

It all started when I was 16.

I was watching a cartoon, Kid vs Kat. when I stumbled episode about model rocketry. That random moment changed everything.

I fell in love with internal ballistics, started building my own rocket engines and spent most of my years learning from Richard Nakka’s writings, building rocket motors in my teens and later studied aerospace engineering.

After graduation, I co-founded Catalyx Space, where we built a custom 0.5U spacecraft and build the world’s lightest satellite separation system for 3U-class spacecraft, creating a new deployment architecture we call the Non-Canisterized Deployment Standard.

We got into Techstars, Founders, Inc. raised and $1.7M pre-seed kept building relentlessly.

Within 6 months of our Pre-seed round we completed a high-altitude drop test with just ~7% of the budget of comparable re-entry programs.

Today, I’m thrilled to share that Catalyx Space has just closed a $5.4M seed round, bringing our total funding to $7.1M.

Huge thanks to @outlandervc , with participation from; @ArkaVentureLabs , Lex readdy , KDX Management LLC, @scaletogether, Higher Life Ventures, @NiveshaVentures , Prana Tech Ventures, Bria fund, @hf0 , @Techstars for believing in our vision.

Amazing job by @riftron_ , @niharikanaveen , and @heysaqh, who drove this round to close in record time. And above all, gratitude to our customers and the entire Catalyx team, none of this happens without you.

With this new capital, we’re ready to accelerate:

1. Advancing our next-gen ultra low ballistic coefficient re-entry systems.
2. Expanding our spacecraft bus platforms and ground-station infrastructure.
3. Establishing a new manufacturing facility in India and growing our team by 40+ talented engineers scaling from a 4-person core to 14 specialised departments.
4. Executing a pipeline of upcoming test-bed missions.
5. Developing an entirely new re-entry system architecture, something we’ve been quietly testing that could change how spacecraft come home.

Downmass capability is the final piece of the puzzle connecting space and the global economy. It will allow us to commercially harness the true value of LEO.
@ChandKeerthan @heysaqh @niharikanaveen @thaneeeem @Mohamediliyas_ @PavanB71486 @UchitModi @chitta_pavan @nssdatta @Asifoff7 @MhmdMuzamil

[Rifath Shaarook @riftron_]

Funding Announcement: @catalyxspace has raised a $5.4M seed round to build the complete back-end infrastructure for space — enabling both upmass and downmass for the next era of orbital logistics. This brings our total funding to $7.1 million.

Exactly one year ago, my friend @heysaqh and I left everything behind in India and arrived at LAX, hoping to build our new space company in the U.S. Meanwhile, our friends @clinton_atspace and @ChandKeerthan focused on developing spacecraft hardware back home in India.

We joined the @techstars space accelerator and later @hf0 , raising a $1.7M pre-seed round in December 2024 from HF0 and @fdotinc, before moving to San Francisco — the city I love most.

The entire team relocated to SF in January for HF0. Since then, we’ve 5X’d our revenue, built a re-entry capsule, launched our first spacecraft, and completed our drop and landing tests.

We’ve grown to a 20-person team and begun constructing a new spacecraft manufacturing facility in India.

Today, we’re thrilled to announce our $5.4M seed round, led by @outlandervc , with participation from @ArkaVentureLabs, Lex Reddy, KDX, @scaletogether,
Higher Life Ventures, @NiveshaVentures, Pranatech, Bria, @hf0 and @Techstars.

Thanks to the Almighty for everything and everyone who has believed in us.

This round will help us demonstrate our next-generation re-entry and landing technology, scale our GTM, and execute upcoming missions.

Multiple missions are already lined up — each bringing us closer to making orbital logistics as seamless as air cargo.

We’re not just launching satellites — we’re building the operating system for space logistics.

Time to get back to building, testing, and launching.

The future of space isn’t one-way.

Upmass. Downmass. Infinite possibilities.