Niobium Microsystems Raises $23M+ to Accelerate Fully Homomorphic Encryption Hardware

Niobium Microsystems, a Dayton, Ohio–based semiconductor startup developing custom hardware to accelerate fully homomorphic encryption (FHE), has secured a $23 million+ oversubscribed investment round that underscores growing investor confidence in privacy‑preserving computing technologies. The funding, which closed in early December 2025, represents a significant step forward for the company’s efforts to transition its prototype FHE silicon into production‑ready hardware suitable for real‑world deployments.

The funding round saw participation from a mix of returning backers and new strategic investors. Fusion Fund, a venture capital firm known for backing early‑stage technology companies, was among the returning investors, reinforcing its support for Niobium’s vision of secure data processing. Morgan Creek Capital Management, an investment firm with a broad portfolio spanning venture capital and institutional asset management, also returned to participate. Rev1 Ventures, which provides seed‑stage capital and startup services in Ohio, continued its backing alongside Ohio Innovation Fund, a regional fund focused on Ohio‑based innovation ecosystems.

In addition to these returning supporters, the latest round attracted several new investors from both the corporate and financial sectors. Strategic newcomer Blockchange Ventures, a venture firm investing in blockchain and cryptography infrastructure, joined the round, reflecting a broader interest in technologies securing data in decentralized environments. The corporate venture arm ADVentures of Analog Devices, Inc. also participated, aligning with its mandate to support emerging technologies that expand analog and digital innovation frontiers. Korea Development Bank (KDB), South Korea’s state‑owned policy bank, made its first commitment to Niobium, signaling international confidence.

Further contributions came from JobsOhio Ventures, the investment arm supporting growth in the Ohio economy, and Rev1 Angels, a group of angel investors affiliated with Rev1 Ventures. Silicon Catalyst Ventures, a venture capital firm specializing in semiconductors and hardware innovation, also joined the syndicate. Together, this diverse set of investors brings a combination of capital, industry expertise, and ecosystem connectivity that positions Niobium for accelerated development and commercialization.

According to company statements, the fresh capital will be used to finalize the architecture of Niobium’s second‑generation FHE silicon, begin development of a production‑ready ASIC, and expand the company’s ability to support pilot programs with early adopters. Niobium’s FHE hardware accelerators aim to enable organizations to perform computation on encrypted data without ever decrypting it, a breakthrough that promises to transform how sensitive information such as medical records or financial data is processed and shared.

Since its founding in 2021 as a spin‑out from cryptography research firm Galois, Niobium has steadily built expertise at the intersection of cryptography, semiconductor engineering, and secure computing. Earlier rounds of funding helped the company tape out its first FHE accelerator chip and establish its core engineering team. The latest oversubscribed round brings the company’s total capital raised to more than $28 million across seed and follow‑on funding.

Industry observers note that FHE represents a next‑generation approach to data privacy that could be critical for sectors grappling with both regulatory pressures and the advent of quantum computing threats. Traditional encryption methods often require data to be decrypted before computation, exposing it to potential breaches; fully homomorphic encryption reverses this paradigm by enabling computation on encrypted data, preserving confidentiality throughout the process. Niobium’s silicon‑level acceleration is designed to address the historically prohibitive computational cost of FHE, making it more practical for enterprise and cloud use cases.

“The rise of AI, quantum computing, and distributed computing has expanded possibilities and risks in the data economy,” said Niobium CEO Kevin Yoder in comments accompanying the funding announcement. “Niobium is building the hardware foundation for the encrypted future.” The company’s plans include deepening engagements with hyperscale cloud providers and exploring applications in blockchain, federated learning, and other privacy‑sensitive domains.

With this new capital and supporter base, Niobium Microsystems is poised to accelerate its journey from research‑driven startup to a commercial leader in secure computation silicon, addressing one of the most pressing challenges in data security today.