Latest Fall 2026 launches from the last 24 hours

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YC F26 Daily Digest

Sat, September 26, 2026

4 new startups from YC F26 launched in the last 24 hours (96 total). 9 weeks and 2 days until demo day (Dec 2).

OpEra

Automated operations research (OR) lab

OpEra is an automated operations research lab that applies mathematics and AI to optimize operations for retail, logistics, manufacturing, and agriculture. They help VP of Operations, supply chain leaders, plant managers, and COOs improve efficiency and decision-making by delivering optimization solutions without requiring in-house operations research expertise.

operatechnologies.com YC Profile LinkedIn 𝕏 OperaYCF26

Spine

We run benefits, payroll & compliance for startups, for free

Spine runs benefits, payroll, and compliance for startups for free. They assign teams dedicated senior HR and benefits specialists who operate on top of existing HRIS systems like Rippling, Deel, Gusto, or ADP. They help companies find better-fit, more cost-effective health plans that reduce healthcare costs by around 15% on average, while handling payroll, compliance, open enrollment, and employee support directly in Slack. Over 30 startups currently use Spine.

joinspine.ai YC Profile LinkedIn

Founders (2):

Ece Cokar

Co-Founder at Spine. Previously co-founded Feed (2021). Oxford-trained lawyer.

Onur Kardesler

We run benefits, compliance and people ops for startups for free. Co-Founder at Spine. Previously Firefly (2017), a digital car top advertising platform backed by top-tier VCs. MBA from INSEAD, engineering degrees from EPFL and Koç University.

LinkedIn • 𝕏

OpenHack

Always-on AI security engineer

OpenHack builds an always-on AI security engineer that finds critical vulnerabilities in codebases. They ingest business context, system design, and developer intent to perform AI-powered codebase scanning, pentesting, and supply chain security analysis. Unlike traditional security tools, they automatically verify and prioritize vulnerabilities while filtering out false positives, reducing overhead for engineering teams.

openhack.com YC Profile GitHub LinkedIn 𝕏 openhack

Founders (1):

Ananay Arora

Founder/CEO at OpenHack (YC F26)

LinkedIn • 𝕏

Hue

Test agents in realistic worlds built from production usage

Hue builds testing infrastructure for AI agents by converting production usage into repeatable tests. They capture the tools, data, and state from real agent runs, letting teams test under conditions that mimic actual usage. Aneesh was the second AI PM at Datadog where he built and launched Datadog's AI SRE product. Josh has engineering experience at Apple, Gusto, and several YC companies. They solve the problem of testing agents whose behavior depends on complex real-world context that's hard to reproduce in development.

hue.run YC Profile LinkedIn

Founders (2):

Josh Le

Co-founder & CTO at Hue Prev engineering at Apple, Gusto (W12), August, Wayfair, SendBlue (S23), Sixtyfour (X25) KP fellow

LinkedIn • 𝕏

Aneesh Kethini

Co-founder & CEO of Hue Second AI PM at Datadog, built and launched Datadog's AI SRE. Prev QT at SIG.

LinkedIn • 𝕏

Never miss a launch

[YC F26] 4 New Launches - Sat, Sep 26 🚀