Nov 21, 2025 12:58:49 AM

Companies


Showing 3326-3350 of 5661 companies
YC W20
Operator Labs logo

Operator Labs

Building protocols for the intelligent, decentralized web.

Bitcoin pioneered unstoppable money, Ethereum the decentralized World Computer. Our goal is to ensure that intelligence follows the same trajectory.

YC S11
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Opez

Yelp for service pros.

Opez is dedicated to helping you discover exceptional service professionals. But who are these people, you might ask, and what are they like? Well, friends, let us tell you. To us, exceptional service professionals are individuals who consistently exceed your expectations in their line of work because they love what they do and because they love their customers.

YC W20
Ophelia logo

Ophelia

Medication & support to beat opioid addiction from home

Ophelia helps people quit opioids without going to rehab. We offer online doctor’s visits, withdrawal medication prescriptions, and support for long-term recovery, using a protocol 6x more effective than most rehabs (2/3rds of which don't have doctors). More than 3 million Americans are addicted to opioids, but 80% are not getting help, due to jobs, families, and privacy concerns. Meanwhile, there's a proven treatment that increases survival rates by 600%, and it's low cost, discreet, and convenient. It's called MAT, and it looks like treatment for anxiety or depression: medication plus therapy. However, doctors need a special waiver to prescribe the medication, which fewer than 5% of them have, so it's difficult to get, and most people are buying it on the street. Sadly, drug dealers aren't doctors: every 11 minutes another American dies of an opioid overdose, now the #1 cause of death for Americans under 50. Ophelia is replacing rehab with telemedicine, using proven science and a consumer-first approach. The opioid treatment market in the U.S. is $15B, and 85% of opioid addicts have insurance that pays for it. We're treating roughly 400 patients with thousands more waiting. Zack started Ophelia after losing his girlfriend to an opioid overdose, who found it easier to get medication from a drug dealer than a doctor. We are raising money to help patients in waiting, grow our footprint, save lives, and earn venture-level returns for investors.

YC S21
Opkit logo

Opkit

AI phone calls for the US healthcare industry

Opkit uses AI to automate routine phone calls for medical practices, telehealth companies, and other leading healthcare provider organizations. Opkit's AI agent is capable of executing a wide-range of non-clinical phone call tasks, including Verification of Benefits, patient intake, and appointment scheduling, without human intervention. Opkit is HIPAA-compliant and SOC 2 Type 2 certified.

YC S24
Opslane logo

Opslane

Deploy to Kubernetes in minutes

Opslane is a developer-first Kubernetes delivery platform. Connect your repo and get previews, safe rollouts, and instant rollbacks — no YAML, no ops team required.

YC S16
O

Opsolutely

Automated deployments for software teams.

The best way for businesses to ship software. Opsolutely empowers engineering teams to be more productive, inclusive, and collaborative by making the most challenging and chaotic part of their software creation process safe, easy-to-use, and friendly for every member of the team.

YC W22
Optery logo

Optery

Opt out software that removes your private info from the internet

Optery is automated opt out software, and we serve individuals, families and businesses. With Optery, you can remove yourself from hundreds of data brokers that are posting and selling your home address, phone number, email and other private information on the internet. Optery received the “Editors’ Choice” award by PCMag as the most outstanding product in the personal data removal category in 2022, 2023, 2024, and 2025, the Cybersecurity Excellence Awards for Attack Surface Management, Digital Footprint Management, and Employee Privacy Protection in 2024 and 2025, Cyber Defense Magazine’s Top InfoSec Innovator and Best Attack Surface Management awards in 2024 and 2025, the 2025 Fortress Cybersecurity Award for Privacy Enhancing Technologies, and Fast Company’s Next Big Things in Tech award for security and privacy in 2023. In 2025, Optery was also listed by Business Insider as one of 30 early-stage startups most likely to become a unicorn. Optery prevents phishing and social engineering, identity theft and fraud, online stalking and harassment, ransomware, doxxing, and prevents people's private information from showing up in Google search results. Anyone can create a free account to receive a personalized Exposure Report with live screenshots summarizing where your information is being posted and sold online. Optery then provides free tools for self-service removals, or you can upgrade to a paid plan, and Optery will remove the profiles for you. Optery for Business serves enterprises removing personal information from the internet for their employees and executives, and offers an API enabling application developers to embed data broker scanning and removal technology into their applications.

YC S18
Optic logo

Optic

Making APIs Developer-friendly

We help developers collaborate at scale and build better APIs. Optic’s open source tools makes it easy for developers to document API changes, review each other’s API changes during code review, and catch breaking changes before they reach production. **tl;dr** It’s version control but for behavior not code. We are taking the really successful ideas from Git / Code Review / CI and applying them to API descriptions and (future) other non-code artifacts. Engineers at [Snyk](https://snyk.io/) use Optic daily to make the new Snyk API great. Read their engineering blog: [Snyk's shift left approach to API development | Snyk](https://snyk.io/blog/snyk-api-development-shift-left/)

YC W25
Optifye.ai logo

Optifye.ai

AI performance monitoring for factory workers

Optifye.ai does AI performance monitoring for factory workers We place cameras in factories and use vision AI to tell supervisors who's working and who's not in real time. The shop floor has historically been a black box. With Optifye, manufacturing companies can now accurately measure worker output and boost efficiency!

YC W10
Optimizely logo

Optimizely

The first all-in-one operating system for marketing

At Optimizely, we're on a mission to help people unlock their digital potential. We do that by reinventing how marketing and product teams work to create and optimize digital experiences across all channels. With Optimizely One, our industry-first operating system for marketers, we offer teams flexibility and choice to build their stack their way with our fully SaaS, fully decoupled, and highly composable solution. We help companies around the world orchestrate their entire content lifecycle, monetize every digital experience and experiment across all customer touchpoints – all through Optimizely One, the leading digital experience platform that powers every phase of the marketing lifecycle through a single, AI-accelerated workflow. Optimizely has nearly 1500 employees across our 21 global offices and has 700+ partners. We are proud to help more than 10,000 businesses, including H&M, PayPal, Zoom, and Toyota, enrich their customer lifetime value, increase revenue and grow their brands. At Optimizely, we live each day with a simple philosophy: large enough to serve, small enough to care. Learn more at optimizely.com.

YC X25
Opusense AI logo

Opusense AI

AI for Field Inspection Reports

Opusense AI automates field report writing for construction field inspectors. Instead of typing up notes at the end of the day, inspectors can now walk a site, speak observations aloud, snap photos, and let our AI assistant generate a detailed, organized report on-site and in real time. Combined, the founding team has over 15 years in the construction industry. Writing up these field reports used to take up at least 20% of the week. With Opusense, we cut that time by 5x. Our team combines deep construction experience with technical expertise, Roya has a PhD in civil engineering, and Michael has worked at multiple construction tech startups. Why hasn’t this been done before? Construction is slow to adopt new tech, and reporting is messy, photos, voice notes, and field notes all live in silos. Turning that into a clear, structured report requires real insight into how inspectors work and what clients need. Only now, with advances in AI, can we process unstructured data adequately to generate high-quality reports in real time. The opportunity is massive. Every inspection firm and contractor is struggling with documentation. Manual reports slow them down, create inconsistencies, and delay handoffs. We believe AI can do this better, and Opusense is proving it.

YC S10
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Opzi

Q&A for businesses.

Opzi was a knowledge management platform, styled as a "Quora for the enterprise," that became the First Round Network.

YC S23
Ora AI logo

Ora AI

Med school can be simpler

Ora is an AI-native education platform that students love. We're starting with medical school, training students from matriculation to MD. Soon, we'll serve every corner of the $830B higher education market.

YC S20
Orange Health Labs logo

Orange Health Labs

India's Fastest Diagnostics Service

Orange Health Labs is India’s leading on-demand diagnostics lab for urban consumers, offering 30-minute at-home sample collection and 6 hour reports across the top cities of India Launched in January 2021, Orange Health Labs is amongst the most loved healthcare brands in India and is backed by some of the world’s leading investors like Accel, General Catalyst, Y Combinator, Bertelsmann India, Amazon, and others.

YC S25
Orange Slice logo

Orange Slice

AI agents that find you customers who already want to buy

Orange Slice uses AI agents to crawl the internet for temporal signals/firmographic data that help sales teams find high-intent prospects by continuously monitoring the internet for buying signals and firmographic changes. Our agents scan millions of data sources - including company websites, news articles, job postings, press releases, and social media - to detect meaningful events such as leadership changes, product launches, funding rounds, hiring trends, and more. These insights are transformed into actionable sales signals that indicate a company’s likelihood to purchase your product. With Orange Slice, revenue teams can prioritize outreach, personalize messaging, and dramatically improve conversion rates by engaging the right accounts at the right time - based on what’s actually happening, not just static firmographics.

YC W18
Orangewood Labs logo

Orangewood Labs

Orangewood Labs makes worlds most affordable and easiest AI robot arms

Orangewood Labs makes the world's most affordable AI-powered industrial robotic arms for small businesses! Our robots can be programmed by just using natural language prompts and cost a fraction of human labor.

YC W21
Orbillion Bio logo

Orbillion Bio

Tasty and scalable cultivated meat at price parity

Intro to Orbillion Bio: https://www.youtube.com/watch?v=wAf21WXxnhw (Slush Nov 2024) Orbillion is making cultivated beef at scale using advanced computational models to rapidly optimize the bioprocess and reduce cost. With Orbillion’s proprietary bioware, they can precisely control the microenvironment that the meat cells need. This supercharges cell growth without the need for GMO, serum, or expensive growth factors, enabling a cost of $4 per kg at commercial scale. Orbillion’s technology addresses the industry's two main challenges: cost and scale-up. Its integrated bioprocess platform allows Orbillion to produce at a commercial level anywhere globally within two weeks in an asset-light fashion. Partnerships with two global food companies of combined $280B revenue, and a European partner have fast-tracked commercialization in the $211B ground beef market. Founders Dr. Patricia Bubner and Samet Yildirim are the only industry founders with scale-up experience in mammalian cells from the biopharma industry. Orbillion is backed by The Venture Collective, Y Combinator, At One Ventures, Venture Souq, and Hub71 among others.

YC S23
Orbio Earth logo

Orbio Earth

Tracking methane emissions with satellites

Orbio uses satellite imagery to track methane emissions from the oil & gas industry. We sell the data to financial companies that want to invest into the best performing energy companies. Until today, oil & gas companies use excel-based emission factors to calculate and report their emissions. As these excel-based emission factors underestimate actual emissions by ~70%, the finance companies that invest into oil & gas can’t mitigate against incoming risks from new regulations, We have built a technology that can for the first time use satellite images to track methane from every single oil & gas facility on the planet, replacing emission factors and allowing finance companies to make the best bets on oil & gas companies that will withstand a wide avalanche of incoming regulation. In the summer 2023 our satellite-based technology got ranked #1 both in terms of accuracy and sensitivity of methane emission events by Stanford University in a peer-reviewed study, beating a range of multi-bn dollar competitors like Maxar. Learn more at https://orbio.earth

YC W25
Orbital Operations logo

Orbital Operations

High Thrust Space Vehicles for Satellite Defense

Orbital Operations is developing a high thrust, reusable space vehicle for satellite defense. We protect critical satellites, like GPS and Military communication satellites, from adversarial threats, like China and Russia. Our vehicle will use the exact same propulsion systems that launch vehicles have used for decades by implementing a cryogenic management system. This will give us over 100x the thrust or current in-space propulsion. Ross and I have over 15 years of combined aerospace experience across NASA, Aerojet Rocketdyne, SpaceX, Blue Origin, and Relativity Space. We’ve worked side by side for more than 3.5 years developing propulsion systems, turbomachinery, and building our own respective engineering teams. We are currently working on the first demo of our unique cryo management system and intend to launch an operational vehicle by 2027.

YC W20
Orbiter logo

Orbiter

ML models automatically monitor business performance

Orbiter’s ML models monitor business metrics automatically and send alerts when those metrics experience abnormal drops or spikes. Any company can onboard in less than five minutes with just their database credentials - no engineering required.

YC S24
Orca logo

Orca

Jet engine for game development

Simplifine is making Orca, the open-source AI game engine, so you don't need to give your years to make a game. We are integrating a chat bot, with complete access to Godot. The chatbot can: Read/edit/create/delete files Understand the entire project as context Create images and keep consistency across images created Edit Godot native objects, e.g. nodes, scenes, ...

YC W22
Orca logo

Orca

Banking for Gen Z, on steroids.

Orca is banking built for Gen Z from the ground up. Send money instantly, split bills with groups, access local discounts and perks, spend and save, and do everything else you could ever ask on Orca — the only financial hub you'll ever need.

YC W20
Orchata logo

Orchata

Groceries delivered in 20 min in Latinamerica

Orchata is an app where you can get groceries & daily essentials delivered in 20 min in Latin America. All the way from fresh fruits, meat, alcohol, pharmacy, groceries, snacks and top e-commerce brands with no substitutes and at supermarket prices. We launched the service in Mexico and grew it from $0 to $6.3M in revenue and +30k customers. LATAM grocery is a huge US$ 451B market that is moving online fast. Orchata goes further with all-in-one software for darkstores around the city. We are following the Billion USD playbook that Gopuff built in the US.

YC W23
Orchid logo

Orchid

AI-powered EHR for independent mental health professionals

Orchid is an AI-powered Electronic Health Record (EHR) for independent mental health professionals that saves them time, money, and frustration by integrating core administrative workflows, streamlining clinical processes, and automating manual flows.

YC W25
Orchids logo

Orchids

The AI Full Stack Engineer

At Orchids, we’re building the tool that will fundamentally change the way people build apps and websites. Our sole job is to harness increasing AI intelligence into creating the only tool people will ever need to get an app or website out into the world. If this mission resonates with you, we encourage you to apply for a role at Orchids - orchids.app/careers.