#1
Most active angel investor in the U.S.2024
“Sahin is the most surprising person on this list to me”
— Lenny Rachitsky, Lenny’s NewsletterRead Lenny’s list
Angel Investor Tracking the Next Wave
Sahin Boydas is an angel investor in 234 startups across 14 categories. 6 have gone public and 13 have been acquired.
234
Companies
6
IPOs
46
$1B+ Companies
13
Acquisitions
53.0%
IRRiUpdated October 18, 2026
Investment Thesis
A long-term view on the builders shaping durable technology companies.
Read Sahin’s public perspective on founder conviction, long-term company building, and the technology themes represented across the portfolio.
Read the investment thesisBrowse Startups in my portfolio organized by market, category, sub-category, and current public status. Each profile links to the company’s official website where available.
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Building something interesting? I’d love to take a look.
Anthropic
Building reliable, interpretable, and steerable AI systems
Scale AI
The Data Engine that powers the most advanced AI models
Colossal
Genetic engineering for de-extinction and species restoration
Kalshi
Regulated prediction market platform for event betting
Polymarket
Bet on your beliefs
Groq
Groq is a machine learning systems company
Kraken
One of the largest and most trusted digital asset platforms globally
Lambda
GPU compute for deep learning, accelerating human progress.
Shield AI
Autonomy for the world.
WHOOP
Optimize your sleep, strain, and recovery with an advanced wearable.
1x
General-purpose humanoid robots, starting with NEO for household chores
Replit, Inc.
Replit makes an AI app builder and cloud coding platform that turns plain-language descriptions into working, deployed apps and websites.
Together.ai
Together AI runs a cloud platform for developers and enterprises to run, fine-tune and train open-source AI models on GPU clusters.
Glean
AI-powered workplace search. Across all your company's apps
Clay
Clay is a data infrastructure and workflow platform that lets go-to-market teams combine data sources, run AI-assisted research, and automate growth workflows.
Postman
The API platform for building, testing, and using APIs faster.
Higgsfield
Personalized AI video for the next generation of entertainment.
Apptronik
Apptronik builds Apollo, a general-purpose humanoid robot that works next to people in manufacturing, warehouses and retail.
Mercury
The banking stack for startups*
Lightmatter
The Photonic (Super) Computer Company
Micro1
Micro1 is a data research lab that produces expert human data, real-world training environments, and contextual evaluations for training frontier AI models and assessing AI agents.
Core Automation
Core Automation is an AI research lab building systems that automate work, starting with its own research, and developing learning algorithms and architectures beyond transformers.
Human Interest
Affordable and easy retirement savings plans for every employee.
Remote
Remote allows companies to employ anyone, anywhere
KoBold Metals
Discovering the battery minerals critical for the electric vehicle revolution
Magic
24/7 virtual assistant
Astranis
Building next-generation internet satellites to get the world online
Owner.com
Online ordering, websites and marketing software for independent restaurants
Armada AI
The full-stack platform for next-generation edge computing.
Turing
LLM training. Unleashing the world's untapped human potential to accelerate AGI
Aalo Atomics
Creating abundant and dependable clean energy to power humanity for generations
Firefly
Full-screen advertising on rideshare and taxis.
Harbinger
Familiar Form. Revolutionary Foundation
Kin Insurance
Convenient and efficient insurance policies
Pipe
Offer embedded financial products inside the software businesses use every day
Boom Supersonic
Developing Overture, a supersonic passenger airliner, and its Symphony engine
Radiant Nuclear
Small modular nuclear reactor technology
Front
Front is an API service provider
ZenBusiness
All-in-one platform for business formation, compliance, and banking.
Dexterity
Dexterity develops a physical AI platform that gives industrial robots human-like dexterity for logistics work such as truck loading, running full production shifts at large carriers.
Cart.com
Unified commerce and logistics for B2C and B2B businesses.
Varda Space Industries
Building and manufacturing products in orbit.
Apollo GraphQL
Apollo helps engineering teams build unified graphs to accelerate development
Eight Sleep
Designed to help you fall asleep faster and stay asleep
Republic
Investment platforms for startups, private companies, crypto and tokenized assets
Gecko Robotics
Robotic inspection systems for industrial infrastructure
Exowatt
Modular solar-thermal power with built-in heat storage, mainly for data centers
Tensordyne
Tensordyne, formerly Recogni, develops Napier, a full-stack AI inference system combining logarithmic-math chips, compute trays and a scale-up interconnect for data centers.
Public
Commission-free stock trading platform
Fundbox
Shaping the future of small business lending
Clara
The corporate spend platform for Latin America.
Heyday
Retain more of what you learn. Automatically
Hologen
Multi-modal foundation models for Neurology and Healthcare
Perch
A global commerce company accelerating owned and acquired brands.
Sendbird
Enterprise-grade AI for reliable, delightful customer service.
Standard Bots
Affordable collaborative robots for manufacturing
Hermeus
Building the world's fastest aircraft.
Reliable Robotics
Autonomous aircraft systems for cargo delivery
Cadre
Commercial real estate investing platform for individuals and institutions
General Compute
General Compute operates an AI inference cloud on purpose-built chips such as SambaNova and Cerebras, selling dedicated capacity and API access to developers and enterprises.
Nanotronics Imaging
Nanotronics, now CubeFabs, builds modular, AI-run micro-factories that manufacture next-generation semiconductors, starting with gallium-oxide power chips for data centers and electric vehicles.
AltoIRA
The self-directed IRA platform for all your alternatives
Hebbia.AI
AI Agents for serious work
Copenhagen Atomics
Copenhagen Atomics develops thorium-fueled molten salt reactors, designed for mass manufacturing, that supply affordable carbon-free power to utilities and energy producers.
Hex
The AI analytics workspace for smarter team decisions.
Path Robotics
AI-powered autonomous robotic welding for manufacturers
Efficient Computer
Energy-efficient computing processors
Firestorm
Builds modular unmanned aerial systems for defense.
Monarch Tractor
Leading the digital transformation of farming
Firehawk Aerospace
Builds solid rocket motors and propellants using additive manufacturing.
Nitra
Financial software for medical practices: cards, bill pay, accounting and lending
StyleSeat
StyleSeat is the go-to marketplace to discover and book beauty services
Workstream
Automated hiring platform for hourly workers
Pika
An idea-to-video platform that brings your creativity to motion
Passport
Modern International Shipping
Slingshot AI
Mental-health AI lab behind Ash, an AI therapeutic support app
Commsor
Go-to-network software that surfaces warm introductions for B2B sales teams
Cobalt
Refold AI (formerly Cobalt): AI agents that build and run enterprise software integrations
Phoenix Tailings
Refines rare earth metals from mining feedstock and tailings with a low-waste process
Firefly Health
Convenient, comprehensive, and affordable employer-sponsored health plans.
Machina Labs
Unlocking Manufacturing through Robotics and Artificial Intelligence
Koniku
We are building co-processors made of biological neurons.
Quaise Energy
Quaise Energy develops millimeter-wave drilling technology to reach superhot rock deep underground and build geothermal power plants that supply clean, always-on electricity.
Odeko
Supply ordering and operations software for independent coffee shops
Polsia
Polsia builds an autonomous AI system that plans, codes, markets and operates online businesses for founders.
Volantis
Volantis builds photonic interconnect hardware that links AI chips to large, fast memory pools so data centers can serve very large models at low latency.
Sunday
Lawn Care Made Safe & Easy
Pyka
Pyka builds autonomous heavy-lift aircraft for agricultural spraying, cargo logistics and defense missions.
Karman Industries
Builds advanced thermal systems for data centers.
Normal Computing
Develops AI tools and hardware for the semiconductor industry.
Orderful
API Powering the World’s Supply Chain
Trust & Will
The easy, fast, and secure way to set up your estate plan online
Thea Energy
Stellarator fusion energy using arrays of software-controlled planar magnets
Biofire
Biofire: Building the future of firearms safety
Pallet
AI workers for logistics
Aurelius Systems
Aurelius Systems builds autonomous, AI-guided laser defense systems that protect troops, bases and infrastructure from drone threats.
Brellium
Brellium automates your chart review with AI.
UpCodes
Helping the construction industry cut through red-tape
Deployable Energy
Deployable Energy builds the Unity Nuclear Battery, a transportable 1 MW microreactor designed for factory production and rapid deployment to industrial, defense and remote sites.
Fin
Fin provides API-based cross-border payments infrastructure that lets businesses collect and send funds through bank-transfer, local payment, and stablecoin rails.
Parasail Inc.
AI inference cloud that runs open and frontier models on on-demand GPUs
Reach
Long-range wireless power transfer
Sully.ai
Creating superhuman doctors
MUD\WTR
Coffee alternative powered by mushrooms, cacao, and chai.
Kled.ai
Kled provides premium, unbiased data to train AI models.
Wonderschool
Platform for starting in-home early education programs.
Odys Aviation
Hybrid electric regional VTOL aircraft
Dandelion Chocolate
Artisanal chocolate maker with direct-trade sourcing
Chef Robotics
Chef Robotics builds AI-enabled robots and ChefOS, its physical AI software, to automate meal assembly for food manufacturers handling varied ingredients and frequent changeovers.
Dusty Robotics
Dusty Robotics makes the FieldPrinter, a mobile robot that prints BIM-based construction layouts directly onto jobsite floors so trades can build to the digital model.
Latus Bio
Latus Bio is developing curative AAV gene therapy products for CNS disorders
Ancient Crunch
Makes traditional American snacks with healthy, high-quality ingredients.
Biostate AI
Generative AI to predict how each living being's health changes
Cytronic
Cytronic runs robotic ecommerce fulfillment warehouses as a service, storing, picking, packing and shipping orders for direct-to-consumer brands.
Featherless AI
Open-source AI model serving and inference platform
Multion
Your personal AI agent
Neurable
The Mind. Unlocked
Nomagic
The smartest Pick & Place robots
Ryse Market
Turn rental income into instant revenue. Earn 2% commission on every rent advance.
Terra AI
Achieve certainty in the subsurface
The Standard Electron Company
The Standard Electron Company builds deployable, vertically integrated solar and battery systems that deliver on-site power to industrial facilities.
Reality Defender
Detect Synthetic Media With AI
Anello Photonics
Anello is building advanced navigation sensor solutions for the autonomous world
Maverick Biometals
MaverickX (formerly Maverick BioMetals): chemical technologies for resource extraction in oil and gas, mining and water
Aether
Aether uses AI and a robotic high-throughput lab to discover proteins for stronger materials, critical mineral processing and industrial manufacturing.
Autopilot Invest
Let the best invest for you
Edera
Edera provides a hardened runtime to secure cloud infrastructure.
Lawtrades
Top legal talent, on demand.
Open
Mindfulness studio and app for breathwork, meditation and movement
Warp
Payroll and compliance for startups
Piris Labs
Piris Labs builds optical interconnects for fast, cost-effective AI inference.
Runa HR
Instant global B2C payments and payouts infrastructure.
Minerva
Minerva builds an AI platform for consumer marketing teams that unifies customer data and uses AI agents to plan, run and measure campaigns.
Rosebud AI
Vibe code games. No coding skills required
CellType
Simulates drug response in human biology using LLMs.
Flux.ai
AI-powered electronics design and circuit simulation
Kabcash
BNPL for Mexico
Little Otter
Mental health care for your whole family
Nox Metals
Nox Metals builds automated factories that cut aluminum and stainless steel to size for job shops, OEMs and aerospace and defense manufacturers.
Praxis Robotics
Praxis Robotics captures egocentric video, 3D scans, and other multimodal data from real-world work environments to provide training data for robotics and physical-AI systems.
Tripp
TRIPP: AI Powered Mental Wellness
Haus
A better way to drink
Lightberry
Software and systems that let robots talk with, perceive and learn from people
Spline
A friendly web-based collaborative 3d design tool
Lamb Labs
Lamb Labs is developing Model Processing Units, custom silicon that hardcodes AI-model weights on-chip to enable fast, power-efficient local inference.
Mass Magnetics
Mass Magnetics produces high-performance permanent magnets in the United States from domestic and recycled rare-earth feedstocks.
Mesodyne
LightCell portable generators that turn fuel into electricity with thermophotovoltaics
One Robot
One Robot builds world-model simulations that let robotics teams train and evaluate manipulation policies with less time on physical robots.
Origami Robotics
Builds high-DOF robotic hands that replicate human dexterity.
Posh Energy
Posh Energy develops data centers for AI compute at sites with existing electrical infrastructure, pairing them with battery storage and on-site power generation.
Selfin
Brokers event-driven risk into prediction markets with institutional liquidity
Snow Diamonds
Lab grown diamonds
Synapse Semiconductor
Synapse Semiconductor is a semiconductor lab developing image sensors that process visual information and neural-network computation at the sensor.
Array Labs
Providing quality 3D imagery on a global scale
HiFi Bridge
APIs that move money between stablecoins and bank rails for cross-border payments
Perseus Defense
Low-cost, man-portable guided interceptors that counter small drones
Voxel Energy
Voxel Energy builds off-grid data centers powered by on-site solar and second-life EV batteries for AI compute customers facing grid delays.
21st
React UI component registry and infrastructure for building AI agents into products
Ouros
High-energy-density lithium-ion battery cells for defense, aerospace and drones
Rove Card
Travel loyalty program: earn Rove Miles on bookings and shopping, redeem with airlines and hotels
Supermove
Cloud software for moving and storage companies
Taiki
Universal API for tax documents
Wild Earth
Clean, science-based protein pet food for a healthier pet and planet.
Capstack
Secure marketplace for whole loan and participation trading.
Tomato AI
Tomato AI built real-time accent-softening and noise-cancellation software for call center agents and was acquired by Sanas.
Aquaria
Creating water from the air to safeguard access against climate change
Endolith
AI-guided microbes that raise copper recovery from low-grade ore
Meroka
Buys trades and field-service businesses and equips them with software and AI
sprouts.ai
We are a plug & play all inclusive Account Based Marketing Platform
Seezo
Scale threat modeling to help your developers ship features faster
AgentAstra
AI-first logistics software, plus freight-forwarding businesses run on its own platform
Daivin
Builds tankless dive gear for breath autonomy in extreme environments.
Formation Labs
Formation Labs is an organization dedicated to discovering new pathways
Marr Labs
AI voice agents for phone work such as scheduling, sales and customer service
Travo AI
AI-powered real estate data platform for niche commercial assets.
Valur
Democratizing elite tax mitigation for a broader audience.
Visibl Semi
AI-native custom chip design partner, starting with power electronics
BlueCore Energy
Energy storage and grid management solutions
Composer
Sophisticated quant trading, automated and code-free.
Ruli AI
AI for in-house legal teams: contract review, research, intake and regulatory monitoring
unspun
unspun builds OneWeave, an automated 3D weaving system that turns yarn directly into garments for apparel brands and manufacturers.
autostep.ai
Autostep maps how work happens across a company, identifies repetitive tasks and bottlenecks, ranks them by cost and impact, and helps implement agents or process improvements.
Fenrock AI
Builds AI agents to automate financial crime compliance for banks.
Loops AI
Loops AI builds AI agents for e-commerce brands that power product search, shopping assistance, product enrichment and virtual try-on.
Mate Fertility
Pioneering a transformative approach to the fertility care industry
Minerva Intelligence
AI accounting service for small businesses, from bookkeeping to tax filing
PolarGrid
PolarGrid runs managed inference on dedicated NVIDIA GPUs near end users, giving AI teams one OpenAI-compatible endpoint for open or custom models.
Ressl AI
Provides AI employees for service businesses to automate admin tasks.
TLDC
Paper Instruments (formerly The LLM Data Company): post-trains open-source LLMs and builds AI agents
Neuma
Your portal to intelligence
Boost Robotics
Physical agents for digital infrastructure
Argu AI
Vision AI that lets security teams search live CCTV feeds in plain language
Flyby
Building autonomous drones optimized for ML applications. Made in America
Manufactured
Supply and Finance Inventory for Merchants
Modus
AI headcount planning for sales capacity, compensation and territories
Permanent
Supplies regenerative and organic food from farms to retailers and food brands
Release
Revenue-based financing for commercial real estate owners, without liens or dilution
Solarmente ESP
Rooftop solar, batteries and heat pumps for Spanish homes on subscription
Wild Microbes
Harnessing microbes to replace petroleum and animal products.
Veracity Selfcare
We create a personal selfcare experience build around real internal data
Formulate
Formulate is the factory of the future for chemistry-based products
Superunit
AI agents that complete employment verifications for screening firms and lenders
Capsule
Free, same-day prescription delivery, all from your phone.
Deepinvent
AI platform that searches prior art, generates inventions and drafts patent applications
MENTEN AI
Generative AI and physics-based modeling to design cyclic peptide drugs
Minicircle
Gene Therapy for Longevity, Performance & Wellness
Vector
Vector builds a contact-level advertising platform that lets B2B marketers identify, target and measure the specific buyers behind their pipeline.
Buoyant Aero
Electric, self-flying blimps for aerial advertising and brand experiences
Theo AI
Predict the outcome of your next case. Theo Ai uses predictive analytics to deliver clarity and confidence in every legal decision.
Global Predictions
AI-powered portfolio management for individual investors.
Trestle Biotherapeutics
Bioengineered therapies for Kidney Disease
Airtrek Robotics
Autonomous ground robots for aircraft movement safety, debris detection and inspection
CaseMark
Privacy-first AI summarization for legal workflows.
Labtree
The R&D operating system for biotech startups
Rally
Buy & Sell shares in alternative assets, just like stocks
Terrex
Terrex, now Milestone, runs a marketplace that connects developers and owners of solar, battery and other energy projects with lenders, buyers and investors.
AlphaFlow
Tech-enabled investment in real estate loan acquisition.
Apollo Atomics
Apollo Atomics develops compact, factory-built pressurized water nuclear reactors to power data centers, industrial sites and utilities.
Blueboard
Employee rewards and recognition with curated experiences instead of gift cards
Brainbase
IP management and monetization for brands.
Canvas
The diversity recruiting platform to hire diverse talent.
Cerebras Systems
Wafer-scale AI processor for large language models
Circle
Connecting the world's finance with public blockchains.
Exosonic
Developing supersonic UAVs as a pathway to quiet supersonic flight
Extropic
Thermodynamic computing for AI inference
Jetty
Financial services to improve the lives of renters and property managers.
KeyMe
Robotic key-duplication kiosks, a key-copying app and on-demand locksmiths
Kodiak Robotics
Building self-driving trucks for long-haul freight.
LEX Markets
Software platform for fractional real estate property investment.
Locomation
Re-Engineering the World's Supply Chain for Autonomy
Matternet
On-Demand access to goods. Through the Air. Fully autonomously
Singularity
Provides infrastructure, models, and systems for artificial intelligence.
SpaceX
Revolutionizing space technology
US Bitcoin
Sustainably securing the future of American finance
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Informational notice
This site is an informational company directory and research reference. It is not financial, investment, legal, or tax advice; it is not an offer, solicitation, recommendation, or endorsement. Investments involve risk, including possible loss of principal.