Recently funded startups, hand-picked every weekday
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Oct 22
YC F26 · kairoxsys.com
Kairox Systems — Autonomous drones that fly and swim
Autonomous drones that fly and swim
HardwareDronesAerospaceYCMaritimeDefense · +1 · +4
$250M Series D · xonaspace.com
Xona Space Systems — Satellite navigation and timing from low Earth orbit
Xona Space Systems is developing an independent high-performance satellite navigation and timing system to meet the needs of intelligent systems. Delivered via a secure, high-power signal from Xona's low Earth orbit satellites, the patent-pending PULSAR™ service aims to enable the next wave of automated technology. Learn more at www.xonaspace.com or follow Xona Space Systems on X @XonaSpace.
OtherPrivacy and securityAerospaceFuture Ventures$100M+ · +2
$45M Series A · coherenceneuro.com
Coherence Neuro — Implants and wearables that monitor and treat cancer
Coherence Neuro is a developer of AI-powered oncology medical devices. The company focuses on creating specialized implantable or wearable bioelectronic devices that monitor and treat cancer by analyzing live human biological data. Their efforts aim to advance chronic human clinical trials and seek FDA breakthrough device designation. Coherence Neuro is led by CEO Ben Woodington and CTO Dr. Elise Jenkins.
BiotechnologyHealthcareArtificial intelligenceLux Capital8VCTimeless · +20 · +23
$5M Seed · spartanx.ai
SpartanX Technologies — AI agents that automate full-stack red teaming
SpartanX is a cybersecurity company building an AI-native offensive security platform designed to automate full-stack red teaming. The platform combines 500+ AI agents with coverage across six attack surfaces, exploit validation, and automated remediation to deliver continuous security testing without human bottlenecks. Headquartered in Boston, Massachusetts, its mission is to make autonomous full-stack red teaming accessible to organizations of all sizes.
Artificial intelligenceCybersecurity$1M+
speedrun SR007 · banburyroad.ai
Banbury Road — Multi-agent AI that matches frontier models at lower cost
Multi-agent civilizations that deliver frontier capability at a fraction of the cost and memory of monolithic models.
Deep techAI agentsAI models researcha16z speedrun · +1
speedrun SR007 · blueprint.io
Blueprint — Turns plain language into physical machines
Hardware, as fast as thought. Turning plain language into physical machines.
Developer toolsHardwareAI agentsa16z speedrun · +1
$66M Series C · blacksmith.sh
Blacksmith — Runs GitHub Actions CI on gaming-grade CPUs for dev teams
Blacksmith makes CI faster, more cost-effective, and more reliable by avoiding hyperscaler-based solutions and running GitHub Actions on high-performance hardware with gaming-grade CPUs — tuned for maximum throughput and enhanced with growing observability capabilities. This approach eliminates build bottlenecks, lowers infrastructure costs, and gives teams a clear view into pipeline health. In the AI era, where rapid iteration is critical, Blacksmith keeps development cycles moving — enabling faster validation, safer deployments, and more competitive release schedules. Founded in 2024 by engineers from Faire and Cockroach Labs, Blacksmith is backed by Google Ventures, Y Combinator, and leading dev infrastructure angels.
Software$50M+
Oct 21
YC F26 · audora.art
Audora — Audiobooks where every character has their own voice
Audiobooks where every character has their own voice.
Generative AIConsumerEntertainmentYC · +1
$40M Series A · callbaba.com
Baba — Care advocates for Medicare and Medicaid patients
Baba pairs Medicare and Medicaid patients with AI-supported human advocates who handle their appointments, prescriptions, insurance and benefits across the healthcare system.
HealthcareMedicalCVS Health VenturesValtruisGeneral CatalystGenius Ventures · +3 · +6
$108M Series B · peakenergy.com
Peak Energy — Maintenance-free sodium-ion grid batteries for utilities
Peak Energy builds grid-scale sodium-ion battery storage designed to run its 20-year life without scheduled maintenance, for utilities, power producers and AI data centers. The new money funds US manufacturing.
EnergyRenewable energySolarMaverick SiliconInfinite CapitalEclipse · +4 · +7
$10M Seed · ultra.security
Ultra Security — Visibility and guardrails for autonomous AI agents
Ultra Security is a company focused on providing an agentic security platform designed for real-time visibility and guardrails, ensuring that autonomous agents can operate securely. The company has recently emerged from stealth mode with $10 million in seed funding. Ultra's technology sits between AI agents and the servers and connectors they utilize.
Artificial intelligenceCybersecurityHidden CapitalEntrée CapitalDetroit Venture PartnersFiredrop · +3 · +6
$1.3M Seed · fleetdefender.com
Fleet Defender — Cyber protection and business intelligence for fleet owners
Fleet Defender is a platform intelligence system that provides cyber protection and business intelligence to fleet owners.
Information technology$1M+
$1B Series A · flappingairplanes.com
Flapping Airplanes — AI lab training capable models on far less data
Flapping Airplanes is a frontier AI research lab focused on data efficiency — training capable models without the massive datasets today's labs rely on.
Artificial intelligenceMachine learningNatural language processingSequoia CapitalGVKleiner Perkins · +6 · +9
speedrun SR007 · alven.ai
Alven — AI employee that does the work of property managers
Alven is an AI employee that replaces the need for human property managers
Real estate prop techAI agentsa16z speedrun
Oct 20
YC F26 · wondersearch.ai
Wondersearch — Instant semantic search over your data without embeddings
Instant semantic search over your data without embeddings.
Developer toolsInfrastructureArtificial intelligenceYCB2B · +2
YC F26 · orgo.ai
Orgo — Computers for AI agents
Computers for Agents
Developer toolsCloud computingArtificial intelligenceYCB2B · +2
$48M Seed · different.ai
Different — Runs multichannel demand generation for B2B marketing teams
Different is a marketing system that runs demand generation across channels for B2B companies. It unifies campaign orchestration, personalization, and optimization in one closed loop, allowing lean marketing teams to work more efficiently. Founded by experienced entrepreneurs, Different aims to empower small marketing teams to achieve significant results without increasing their size. The company focuses on enhancing marketing ROI by automating and optimizing campaigns in real-time.
AdvertisingSaaSMarketingLightspeed Venture PartnersGeneral Catalyst$10M+ · +4 · +7
$4M Pre-Seed · withgradient.co
Gradient — Bookkeeping, tax and compliance for US startups
Gradient is an AI-native accounting firm for US startups, offering managed bookkeeping, tax and compliance for a flat monthly fee, with licensed CPAs signing returns.
SoftwareArtificial intelligenceKima VenturesHeartfeltTinyVCAcadian Ventures · +2 · +5
$15M Series A · muralpay.com
Mural — International payments for payroll providers and fintechs
Mural is a New York-based fintech startup founded by former Palantir engineers that provides businesses with a unified platform to manage international payments. The platform allows customers including payroll providers, software companies, and fintechs to hold and transact in traditional dollars, local currencies, and stablecoins through a single account. Mural aims to simplify cross-border commerce by eliminating the need for businesses to juggle multiple banks, payment providers, and regulatory frameworks. The company is building a compliant system that enables businesses and fintechs to launch new financial products on top of its infrastructure.
PaymentsFintechNorth Island VenturesTether$10M+ · +2
$232M · arda.ai
Arda Industries — Software that turns product designs into assembly lines
Arda Industries has launched from stealth with the aim of speeding up American manufacturing. Their software assists manufacturers in rapidly transforming new product designs into operational assembly lines. The company envisions automated robotic assembly lines that adapt as designs evolve, enabling the production of quickly changing products in the U.S.
Manufacturing$100M+
speedrun SR007 · velaenergy.ai
Vela Energy — AI workforce for power delivery
The AI Workforce for Power Delivery
Enterprise SaaSClimate energyAI agentsa16z speedrun · +1
speedrun SR007 · heymirai.ai
Mirai — World models that make real estate explorable
Making Any Real Place Explorable With World Models, Starting With Real Estate.
Travel hospitalityReal estate prop techAI generative mediaa16z speedrun · +1
speedrun SR007 · keythorn.com
Keythorn — Insurance for the AI frontier
Insurance for the AI Frontier
InsurtechCybersecurityAI agentsa16z speedrun · +1
speedrun SR007 · nimbleops.io
Nimble — AI operating system for freight forwarders
AI operating system for freight forwarding
Supply chain logisticsAI agentsa16z speedrun
