Deep Tech Startups

ReactWise develops AI tools for chemistry and chemical engineering, enabling researchers and engineers to accelerate molecular discovery and reaction optimization. The company combines machine learning with chemistry automation and high-throughput experimentation platforms.

1 investor

Realeyes builds Vision AI for human verification, offering face verification, age estimation and deepfake detection models delivered via an SDK. It serves large enterprises and consumer apps, drawing on a GDPR-compliant dataset of over 18 million webcam sessions, and operates globally from a European headquarters.

1 investor

RealFast is an applied-AI strategy and engineering firm that pairs small teams of senior engineers with AI agents to build software systems tied to a specific business metric agreed before any code is written. It works with software-driven enterprises facing urgent, high-stakes problems, delivering owned products and platforms rather than billable hours.

1 investor

Realities.io builds spatial photography and photogrammetry experiences for VR/AR, including puzzle content for headset users. The company develops 3D-captured environments and interactive experiences in the gaming and immersive media category.

1 investor

Reality AI develops an Edge AI software development environment that combines signal processing, machine learning, and anomaly detection for microcontrollers and microprocessors, enabling industrial, automotive, and commercial applications with minimal hardware footprint impact.

1 investor

Reality01 (Dubbl) uses patent-pending 3D capture hardware and a software pipeline to turn real-world objects and artworks into detailed digital replicas for virtual and spatial computing experiences, including on devices like Apple Vision Pro. It serves auction houses, artists, galleries, collectors, and public institutions, and can also produce virtual sets, films, and photographic stills.

1 investor

RealTech Network runs events for deeptech founders working in AI, robotics, national security, manufacturing, and energy. It hosts gatherings with speakers, with an event stated for London, United Kingdom.

1 investor

ReBlink is an AI R&D and product studio that builds multi-agent systems, multimodal models, and generative tools for complex software, with a focus on game engines and studios. Its work includes agents for QA and balance testing, in-game conversational agents, in-engine material and shader generation, and custom models for bounded workloads.

1 investor

Recast Systems develops sensing, modeling, and operational infrastructure for precise weather, working across atmospheric science, software, hardware, and field operations.

1 investor

RECHO AI develops advanced sensing technologies and hardware solutions for industrial and commercial applications. The company leverages expertise in RF hardware, data pipelines, and signal processing to transform complex research into practical sensing systems.

1 investor

Recurrent Research is a technical AI safety lab focused on data poisoning research, model organisms of misalignment, and red-teaming of data systems, aimed at the security and safety risks that grow as AI development becomes more automated. It works with frontier labs, nonprofits, and government organizations to study and mitigate risks from recursive self-improvement.

1 investor

Red Leader develops signal processing IP, integrated ADC/DAC silicon, and end-to-end systems for 3D lidar sensing, using full-waveform processing to improve resolution, range, and accuracy of low-cost sensors without added hardware. Its technology targets safety-critical applications requiring high-speed, low-latency 3D data.

1 investor

Redpoint Positioning provides real-time location system (RTLS) technology delivering location services for industrial and mission-critical operations in harsh environments such as warehouses, chemical plants, and tunnels. Its system offers millisecond-level accuracy across spaces ranging from single rooms to large multi-building campuses, aimed at improving safety, defect reduction, and productivity.

1 investor

Red Ace is a biotech company developing cancer therapies using what it calls selection gene drive technology, delivering therapeutic gene circuits into tumor cells via tumor-targeted viral vectors. Its approach reprograms cancer cells with synthetic vulnerabilities to overcome drug resistance and work alongside existing oncology treatments.

1 investor

Redbud Labs develops microfluidics-based technology for sample preparation products. It focuses on solving complex microfluidic problems in the life sciences and diagnostics space.

1 investor

Redgrove develops infrared camera sensors using nanomaterials and advanced antenna designs for applications in defense, security, driver assistance, and emissions monitoring. The technology targets cost-effective, high-sensitivity thermal imaging solutions for industrial and commercial markets.

1 investor

Redivivum Technology provides AI-powered software for automated identification, inspection, and listing of garments in the second-hand fashion and circular economy sector. The platform serves resale service providers, vintage stores, and 3PL companies by automating garment processing and digital inventory creation.

1 investor

RedSemiconductor develops processor technology for edge computing applications, targeting use cases such as low-power local AI inference, in-vehicle sensor fusion, high-bandwidth data communications, and energy efficiency optimization.

1 investor

RedShiftBio develops analytical technology that provides real-time measurement of biomolecular structure and concentration, aimed at supporting decisions in biopharmaceutical development and manufacturing.

1 investor

Reebeez builds solid-state thermoelectrophotovoltaic (TEPV) microengines for unmanned aerial vehicles that run on lightweight combustible fuels, aiming for longer flight times and higher payloads than lithium polymer batteries and fuel cells. The propulsion system targets small aerial vehicles with higher specific energy at lower cost.

1 investor

Reelwell develops wired drillpipe technology for the oil and gas downhole drilling sector, offering digital telemetry, power delivery, and improved reliability for both land and offshore drilling operations. Its technology aims to reduce well construction costs and environmental emissions through drilling efficiency gains.

1 investor

Refactor is a solo-employee venture capital firm run by an investor named Zal that invests $1–2M in US seed-stage hard tech startups. The firm manages $300M across five funds.

1 investor

Refiant builds a suite of compressed, energy-efficient AI models that run on edge devices or in the cloud, deployable directly, via configuration, or through an API. Its approach makes model context abundant rather than relying on RAG, chunking, and summarization to work around limited context windows.

1 investor

Refoxy is a science-driven company focused on drug discovery, medicinal chemistry, and bioinformatics. The team page emphasizes deep science and collaboration, but the page provides only placeholder text about the company's specific work.

1 investor