Rebellions vs Nebius

By valuation, Nebius is the larger company at $25B versus $1.4B — a 17.9x difference. Size can also be measured by team: Rebellions employs 100-500 people while Nebius has 1,000 employees.

Nebius has raised more in total funding at $2B, compared to Rebellions's $253M — a gap of $1.7B. Combined, the two companies have completed 2 known funding rounds.

Nebius leads with an Awaira Score of 84/100, while Rebellions sits at 65/100. That 19-point gap reflects real differences in funding, scale, and traction — it's not a vanity metric.

Rebellions was founded by Park Sung-hyun in 2020. Nebius's founder information is not currently available in our database.

Rebellions: Rebellions designs AI inference accelerator chips for data center deployment, targeting the workload characteristics of large language model inference and transformer model serving with a custom silicon architecture that aims to deliver better performance per watt than general-purpose GPU solutions for inference-specific workloads. The Seoul company has announced a merger with Sapeon, the SK Telecom AI chip subsidiary, combining two of South Korea most prominent domestic AI chip efforts.\n\nThe company raised approximately $124 million including a Series C round from investors including KT, POSCO, and Korean government-affiliated investment funds. Rebellions ATOM chip has been benchmarked for LLM inference performance and deployed in early customer trials at Korean cloud and telecommunications operators. The proposed merger with Sapeon, if completed, would create a combined entity with broader resources and shared technology for competing against NVIDIA in the Korean AI infrastructure market.\n\nRebellions competes in the AI accelerator market against NVIDIA, AMD, and domestic chip efforts from Samsung and SK Hynix, as well as global AI chip startups including Groq, Cerebras, and Tenstorrent. South Korea semiconductor industry expertise, centred around Samsung and SK Hynix memory chip production, provides a technical ecosystem that supports AI chip design through access to advanced packaging, high-bandwidth memory, and process node expertise. The Korean government has identified domestic AI chip capability as a strategic priority, providing funding support that supplements commercial venture investment in companies like Rebellions. Nebius: Nebius is a Dutch AI infrastructure company that provides full-stack AI cloud computing services, from GPU clusters to managed machine learning platforms. Originally spun out of Yandex, Nebius has established itself as a major AI infrastructure provider with strategic partnerships including a $2 billion investment from NVIDIA and a $27 billion infrastructure deal with Meta covering dedicated GPU capacity and compute resources over a five-year period. The company operates AI-optimized data centers and offers cloud services that span the entire AI stack — from bare-metal GPU access through high-level managed AI services. Nebius competes in the rapidly growing AI cloud market alongside CoreWeave, Lambda, and the major hyperscalers, differentiating through deep engineering expertise across hardware and software layers.

Rebellions got there first, launching in 2020 — that's 3 years of extra runway. Nebius didn't arrive until 2023. In AI, that kind of head start means more training data, deeper customer relationships, and a bigger talent moat.

Rebellions has about 100-500 employees; Nebius has about 1,000. A bigger team usually means more revenue or heavier VC backing, but in AI, small teams can build at massive scale.

Yes — they're direct rivals. Both Rebellions and Nebius compete in AI Infrastructure, targeting many of the same buyers. If you're evaluating one, you should be looking at the other.