From Disrupting Wall Street to Disrupting Orbit

Less than two years after its founding, Aetherflux — the space AI data center startup led by Robinhood co-founder Baiju Bhatt — is reportedly in talks to raise between $250 million and $350 million in a Series B round that would value the company at $2 billion. Index Ventures is leading the deal, marking one of the largest space tech funding rounds of 2026.

The numbers are striking. Aetherflux has raised just $60 million to date. A $2 billion valuation represents roughly a 33x jump, a figure that underscores how aggressively investors are betting on the nascent orbital data center market — and on Bhatt's ability to execute a second industry-defining company.

The Founder: A NASA Legacy Meets Fintech Ambition

Baiju Bhatt's path from fintech revolutionary to space entrepreneur is less surprising than it first appears. The son of a NASA Langley Research Center scientist, Bhatt grew up immersed in the world of aerospace and physics. He earned a bachelor's degree in physics and a master's in mathematics from Stanford, where he met Vlad Tenev. Together, they co-founded Robinhood in 2013, democratizing stock trading for a generation of retail investors.

Bhatt served as Robinhood's co-CEO from 2013 to 2020, then as Chief Creative Officer until March 2024, when he stepped down to pursue his next venture. By October 2024, he had publicly unveiled Aetherflux, seeding it with $10 million of his own capital — a move that signaled both personal conviction and serious intent.

The Robinhood playbook of identifying a massive, underserved market and applying technology to unlock access is clearly influencing Bhatt's approach to space infrastructure. But this time, the stakes — and the technical complexity — are exponentially higher.

The Pivot: From Space Solar to Orbital AI

Aetherflux launched with an ambitious vision: collecting solar energy in space and beaming it to Earth via infrared lasers. The initial use cases targeted U.S. military operations, remote research stations, and mining applications — locations where traditional power delivery is expensive, dangerous, or impossible. The company even secured funding from the U.S. Department of Defense's Operational Energy Capability Improvement Fund for a proof-of-concept demonstration.

Then, in December 2025, Aetherflux made a bold strategic pivot. The company unveiled "Galactic Brain," a project to build and deploy orbital data centers powered by its space solar technology. While laser power transmission experiments will continue on a satellite bus built by Apex Space (using the Aries platform), the company's primary mission shifted squarely to space-based AI computing.

The logic is compelling. Terrestrial data centers are hitting hard constraints: power grid limitations, cooling challenges, land scarcity, and increasingly, community opposition. Space offers effectively unlimited solar energy, a natural vacuum for cooling, and no NIMBYism. By leveraging its core competency in space solar power, Aetherflux aims to vertically integrate energy generation and compute — a differentiation no other orbital data center startup can currently claim.

Funding History: Accelerating Capital

Aetherflux's fundraising trajectory tells a story of rapidly escalating investor confidence:

• October 2024: ~$10M founder's seed investment
• April 2025: $50M Series A — co-led by Index Ventures and Interlagos, with participation from Breakthrough Energy Ventures (Bill Gates), Andreessen Horowitz, New Enterprise Associates (NEA), and notable angels including Vlad Tenev, actor Jared Leto, and master watchmaker François-Paul Journe
• March 2026 (in progress): $250M–$350M Series B at $2B valuation — led by Index Ventures

Index Ventures leading back-to-back rounds is a strong signal. The firm's conviction has only deepened as Aetherflux pivoted from an interesting-but-speculative energy play to a company sitting at the intersection of two of the hottest investment themes in tech: AI infrastructure and space.

The investor roster itself reads like a who's who of Silicon Valley's most forward-thinking capital allocators. Bill Gates' Breakthrough Energy Ventures brings credibility on the energy side, while a16z and NEA provide deep tech scaling expertise.

The Nvidia Factor: Space Computing Gets Real

Perhaps the single most important catalyst for Aetherflux's valuation surge was Nvidia's dramatic entry into space computing. At GTC 2026 in March, Jensen Huang declared that "space computing, the final frontier, has arrived" and unveiled the Space-1 Vera Rubin Module — a purpose-built space AI computing platform.

The specs are formidable:

• Up to 25x more AI compute for space-based inferencing compared to the H100
• Integrated CPU-GPU architecture with high-bandwidth interconnect
• Capable of running large language models and foundation models directly in orbit
• Optimized for energy efficiency in space environments

Aetherflux was named one of just six launch partners, alongside Axiom Space, Kepler Communications, Planet Labs, Sophia Space, and Starcloud. When the world's most valuable semiconductor company builds hardware specifically for your use case and names you a key partner, it fundamentally de-risks the technology thesis.

Bhatt noted that "NVIDIA Space-1 Vera Rubin Module delivers high-performance, energy-efficient AI at the edge in orbit, powered by solar energy" — a statement that perfectly encapsulates Aetherflux's unique positioning at the nexus of space power and space compute.

Competitive Landscape: The Orbital Data Center Arms Race

2026 has emerged as the year orbital data centers transitioned from concept to competition. Aetherflux faces several well-funded rivals:

Starcloud is the most direct competitor and arguably further along operationally. The Y Combinator alum became the fastest unicorn in YC history (17 months) after raising $170 million in a Series A at a $1.1 billion valuation in March 2026. Critically, Starcloud launched a satellite with an Nvidia H100 GPU in November 2025 and claims to have trained the first large language model in space. It has also submitted an FCC proposal for a constellation of up to 88,000 satellites.

Axiom Space successfully launched the first two orbital data center nodes to low-Earth orbit in January 2026, leveraging its extensive space station operations expertise.

Google is exploring the space through Project Suncatcher, while startups like Aethero are also entering the fray.

Analysts project the orbital computing services market could reach approximately $25 billion by 2035, with potential to scale to trillion-dollar territory if space-based infrastructure begins supporting large-scale AI workloads and cloud computing services.

Aetherflux's Edge: Vertical Integration of Power and Compute

In this crowded field, Aetherflux's key differentiator is its vertically integrated approach to energy and computing. While competitors must source power solutions separately, Aetherflux's origins in space solar technology give it a native advantage in the single most critical constraint for orbital computing: energy.

The Series B capital is expected to fund several strategic priorities:

• Accelerating Galactic Brain: Targeting Q1 2027 for the first commercial orbital data center satellite
• Seattle satellite development hub: Tapping into the Pacific Northwest's deep bench of space industry talent
• Nvidia Space-1 integration: Optimizing the Vera Rubin Module for Aetherflux's solar-powered satellite architecture
• Team scaling: Growing from approximately 10 employees (as of late 2024) to a significantly larger engineering organization

The Bull and Bear Cases

The bull case is straightforward: AI compute demand is insatiable and growing exponentially. Terrestrial data centers are running into physical limits. Space offers a paradigm shift — unlimited energy, natural cooling, and no zoning battles. Nvidia's dedicated space hardware makes the technology real. Bhatt has a proven track record of building category-defining companies. And the market opportunity could be measured in trillions.

The bear case deserves equal attention. No company has yet demonstrated commercial-scale AI workload processing in orbit. The Q1 2027 timeline is aggressive by space industry standards, where delays are the norm rather than the exception. Starcloud already has operational hardware in orbit. The economics of launching, maintaining, and upgrading satellite-based compute versus building new terrestrial facilities remain unproven. And a $2 billion valuation for a pre-revenue company with ~$60M in prior funding requires a remarkable amount of faith in execution.

What to Watch

Aetherflux's Series B is more than a single company's funding event — it's a milestone marking the emergence of orbital data centers as a legitimate infrastructure category. The key signposts ahead include: whether the Galactic Brain satellite launches on schedule in Q1 2027, how the Nvidia Vera Rubin Space Module performs in actual orbital conditions, the competitive dynamics with Starcloud and Axiom, and whether enterprise customers begin committing to space-based AI compute contracts. Just as Robinhood proved that a massive market existed where incumbents saw none, Bhatt is now betting that the next frontier of AI infrastructure isn't a plot of land in Texas — it's 500 kilometers above it.