YC Fall 2026 companies worth a look
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YC F26 · ploid.com
Ploid — People data for the agent era
The people data company for the agent era
Artificial intelligenceSalesAPIYCB2B · +2
YC F26 · rystic.ai
Rystic — API simulators for testing and training agents locally
API simulators for testing and training agents locally
Artificial intelligenceDeveloper toolsB2BYCEnterprise software · +2
YC F26 · hundred.systems
Hundred — Automated inspection for consumer electronics parts
100% automated inspection for consumer electronics parts
Hard techHardwareMachine learningYCComputer visionIndustrial · +1 · +4
YC F26 · dydema.com
Dydema — AI models for neurotech
The model company for neurotech.
NeurotechnologyNeuroinformaticsArtificial intelligenceYCB2B · +2
YC F26 · openseo.so
OpenSEO — Open-source alternative to Semrush and Ahrefs
Open source alternative to Semrush and Ahrefs
Open sourceMarketingSEOYCB2B · +2
YC F26
HABU launches at YC (Fall 2026)
Like Crosby, but for real estate development
Hard techReal estateHousingYCReal estate and construction · +2
YC F26 · operatechnologies.com
OpEra — Automated operations research lab
Automated operations research (OR) lab
LogisticsManufacturingSupply chainYCOperationsArtificial intelligence · +1 · +4
YC F26 · pendulumrobotics.com
Pendulum Robotics — Quick-turn, purpose-built motors and actuators
Quick-turn, purpose-built motors & actuators for all
Hard techRoboticsDronesYCManufacturingElectronics · +1 · +4
YC F26 · elimentary.com
Elimentary — Agents that run back-office operations for private capital
Agents that run middle/back-office operations for Private Capital
FinopsEnterpriseFintechYC · +1
YC F26 · cyclon.ai
Cyclon — A phone where AI is the interface
a phone where AI is the interface
HardwareConsumerArtificial intelligenceYC · +1
YC F26 · bryel.ai
Bryel — AI agent for AI research engineering
Devin for AI Research Engineering
B2BArtificial intelligenceYC
YC F26 · grep.ai
Grep AI — AI agents for high-stakes knowledge work
AI agents that automate high-stakes knowledge work you can't afford…
FintechArtificial intelligenceB2BYC · +1
YC F26 · graypass.org
GrayPass — Verifies the right person is in control before key actions
Verify that the expected person is in control before key actions.
BiometricsIdentityInfrastructureYCB2B · +2
YC F26 · faradaycompute.com
Faraday — Industrial OS linking people, AI agents and robots
Industrial aOS between humans, agents, and robots
Artificial intelligenceRoboticsB2BYCManufacturingEnterprise software · +1 · +4
YC F26 · invertix.ai
Invertix — AI that runs energy operations
Energy Superintelligence, AI that runs energy operations.
Artificial intelligenceGenerative AISolar powerYCIndustrials · +2
YC F26 · trylark.ai
Lark — Specialized AI agents for wholesale distributors
Lark - Specialized agents for wholesale distributors
B2BSupply chainArtificial intelligenceYCIndustrials · +2
YC F26 · perit.ai
Perit.AI — Expert-led training data and RL for AI labs
Expert-led data and RL platform for AI labs
Data labelingB2BYC
YC F26 · papaya.fyi
Papaya — Tunes AI agents already running in production
Papaya tunes AI agents that are already in production. You connect traces with a one-line SDK or hand over raw data, and it runs 200+ research-backed analyses across thousands of runs to find what is recurring — prompt and caching inefficiency, tool schema drift, context bloat and retrieval strategy, model selection and routing, retry loops and wasted API calls. Findings come back ranked by impact, each with the specific runs affected, an estimated effect on quality, latency and cost, and a confidence level, delivered into Slack, a dashboard or a PR. The company cites cost reductions up to 52%, latency improvements up to 61% and quality gains of +11%, and offers a free 24-hour audit. Founded in 2026 by Macy Mody, Niyaz Puzhikkunnath and Faiz Vadakkumpadath, Papaya has 3 employees in San Francisco.
AiopsB2BEnterprise softwareYCInfrastructureArtificial intelligence · +3
YC F26 · agent37.com
Agent 37 — Always-on hosted sandboxes for coding agents
Agent 37 runs coding agents as always-on hosted sandboxes, so you host neither the machine nor the state. One POST to /v1/instances provisions an isolated environment with its own URL that you can message across sessions; files, memory and connected tools stay put until you delete it. It runs Hermes, OpenClaw, Claude Code, Codex or a custom harness, in 2-8 vCPU / 4-16 GB sizes, with gVisor kernel-level isolation, encryption at rest and in transit, and SOC 2 Type I. There is no plan fee — compute meters by the minute at $0.0011 per vCPU-hour and $0.00096 per GB-hour of RAM, which puts a continuously running 2 vCPU / 4 GB sandbox near $4.76 a month. Founded in 2026 by Vishnu Krishnaprasad, based in New York City.
Developer toolsSaaSB2BYCArtificial intelligence · +2
YC F26 · usevyra.com
Vyra — AI video editor for people who aren't editors
Vyra is an AI video editor that turns raw footage into finished video. You describe the edit in plain language — "cut my clips to the beat and make a color wheel edit" — and Vyra analyses the uploaded footage and returns a finished draft in minutes, with every conventional editing tool (split, ripple, slip, clone, motion graphics, text layers) available in the same conversation rather than buried in a timeline UI. It is built for people who are not editors but still have to ship video, and it connects to Claude, ChatGPT or any MCP client. Founded in 2026 in San Francisco by Caleb Pong (built neural networks for Omoggle, 3M+ users, and Adobe plugins; CS at Brown) and Sulan Zhang (CS and visual arts at Brown; 60k+ creator following as @sulansart). Y Combinator Fall 2026.
VideoAutomationSmbYCConsumer · +2
YC F26 · runmirrors.com
Mirrors — Staging environments that replay AI agent sessions
Mirrors builds runnable staging environments for AI agents. It captures production traces from an agent's real sessions, reconstructs a working twin of the internal tools and APIs that agent calls, then replays those sessions against every prompt, model or tool change before it ships — so regressions surface in staging rather than in production. The gap it fills is that agents call bespoke internal services no standard test suite can reproduce, which matters most where a mistake is irreversible: issuing refunds, updating records, sending outbound messages. Founded in 2026 in San Francisco by Aryan Singhal (ML research at UT Austin and UCSB; six AI/ML papers published while in high school, three at NeurIPS). Y Combinator Fall 2026.
Developer toolsSaaSB2BYCDevOpsArtificial intelligence · +3
YC F26 · superradiant.co
SuperRadiant — Robots that form hypotheses and run scientific experiments
SuperRadiant builds Embodied Scientific Intelligence: general-purpose robotic experimentalists that observe, form hypotheses and run experiments in the physical world. The system automates the full experimental loop while staying flexible enough for real discovery work, adapting to changing protocols and new instruments. Founded in 2026 in San Francisco by Cooper Niu, Benedict Quartey and Owen Tower, with a team drawn from Brown, NASA JPL, Fermilab and CERN. Y Combinator Fall 2026.
RoboticsEnergyAdvanced materialsYCArtificial intelligenceBiotechnology · +1 · +4
YC F26 · oroagents.com
ORO AI — Open benchmark and rewards for AI shopping agents
ORO AI runs an open benchmark for agentic commerce: builders submit shopping agents that independent validators score against problems that change daily, the best performers earn rewards on Bittensor, and every run produces training data that feeds back into the next generation. Founded in 2026 in Vancouver by Shardul Bansal (ex-AWS, Crucible Labs) and Seth Schilbe (ex-AWS). Y Combinator Fall 2026.
Artificial intelligenceCrypto web3Consumer productsYCB2B · +2
YC F26 · halmoslabs.com
Halmos Labs — Software that picks the most informative lab experiments
Halmos Labs builds autonomous systems for scientific research: intelligent experimental design software that works out which experiment would reduce uncertainty most, so labs get more information from fewer experiments and fewer experiments per conclusion. The platform runs parallel analyses under many possible assumptions, validates every analysis, and answers open-ended questions about results where fixed workflows fall short, with early work spanning wet-lab experiment design and cancer vaccine manufacturing. Founded in 2026 in Lund, Sweden by Mattias Akke and Linus von Ekensteen Lofgren, who have worked at MIT, AstraZeneca and Danske Bank. Part of Y Combinator's Fall 2026 batch.
AI powered drug discoverySwarm AIBiotechnologyYCHealthcare · +2
