Nov 19, 2025 10:37:32 AM

Companies


Showing 3751-3775 of 5661 companies
YC W19
Prometheus logo

Prometheus

We use solar and wind power to make zero net carbon electrofuels

We remove CO2 and water from the air and use electricity from solar and wind power to turn them into zero net carbon electrofuels. These are gasoline, diesel, and jet fuels that work in existing cars, trucks and planes without requiring modification of their engines, and don't contribute to global warming because they don't add any new CO2 to the atmosphere. Each gallon of our electrofuels means a gallon of fossil oil left in the ground forever. Importantly, these fuels for the first time can compete with fossil fuels on price - our zero net carbon jet fuel has a price of one cent per gallon less than fossil jet fuel. American Airlines ordered 10 million gallons of this fuel and we will start shipping it next year.

YC S24
Promi logo

Promi

Optimizing ecommerce pricing with dynamic, personalized discounts

Promi is an AI-powered price and discount optimization platform. We help eCommerce merchants personalize their sales to generate additional revenue and profit. Ecommerce merchants and marketers typically use discounts to drive customer acquisition, boost sales during holidays, or liquidate inventory. But deciding on a discount to offer is typically guesswork. Who to send the discount to, how much to offer, and which products it applies to are, in the most advanced cases, determined manually by looking at past sales and seeing what worked well. In the majority of cases, it's what feels and sounds good. Promi leverages store data to optimize discounts at a more granular level than possible manually. We dynamically determine the best value across each product, for different users, at different times in order to maximize sales and profit.

YC W18
Promise logo

Promise

Better payment systems for governments and the communities they serve.

Promise modernizes government payments helping agencies recover more revenue while giving residents flexible, humane ways to pay. We replace broken systems with tech that actually works for everyone.

YC W21
Promoted.ai logo

Promoted.ai

Dramatically better search and ads for marketplaces

Promoted.ai unifies search, native ads, and feed ranking for online marketplaces and scaled e-commerce apps to dramatically improve relevance (and revenue) using AI. We are a team of ex-Google, Meta, and Pinterest ads engineers. Our customers are publicly traded and late-stage marketplace companies like Eventbrite, Upwork, and Outschool. Our mission is to connect every buyer and seller.

YC S19
Prompt logo

Prompt

Helping busy professionals understand and maintain their relationships

YC W24
PromptArmor logo

PromptArmor

LLM Security and Compliance

YC W22
PromptLoop logo

PromptLoop

AI agents to build B2B datasets

PromptLoop helps GTM teams automate account research and data enrichment at scale. We turn manual web scraping and qualification workflows into automated processes, enabling teams to enrich thousands of accounts with detailed company data and buying intent markers in minutes. Why PromptLoop? Sales and marketing teams traditionally spend hours manually researching accounts or rely on outdated data providers. We automatically crawl and extract precise data points from company websites, social profiles, and public sources at 10% the cost of manual research, with built-in quality controls and strict sourcing. Teams can process 10k+ accounts simultaneously, turning raw URLs into actionable qualification data tailored to your goals.

YC W25
Promptless logo

Promptless

An AI teammate that automatically updates your customer-facing docs

Docs are integral to a great customer experience, but managing them is a challenging, multi-team effort. The most successful companies recognize that fantastic docs drive adoption and bad ones cause customers to churn. Promptless is used by fast-growing startups and Fortune 500 enterprises alike to automatically update docs based on feature releases, support tickets, internal Slack conversations, and more. Promptless is designed to be flexible—it can integrate with any docs platform, be triggered automatically from many workflows, and can pull in context from any internal knowledge source. With Promptless, documentation becomes a strategic advantage for growth, not a bottleneck or a liability.

YC W19
Pronto logo

Pronto

Ride-sharing for second-tier cities in Latin America.

PRONTO is the first RIDE-SHARING + DELIVERY platform for SECOND-TIER cities in LATAM. In second-tier cities all transactions are paid with cash, this is why the Uber model doesn´t work (since they have to collect their revenue from commissions). We solved this by creating a subscription model where drivers pay a monthly recurring subscription of 59 to 99 USD depending on their monthly revenue. This also generates a higher LTV with low CAC as well as high engagement and fidelity ratios. Traction: Since our launch, we have achieved over 2,000,000 processed trips with more than 200,000 users, we bootstrapped until we achieved half a million trips and entered YC. Market Size: There are over 14,000 second-tier cities in LATAM, with more than 500 million people without any access to ride-sharing or technology platforms at all.

YC S19
Proof Trading logo

Proof Trading

Institutional equities broker-dealer

YC S21
PropReturns logo

PropReturns

End-to-end commercial real estate transaction platform

PropReturns is an online platform to buy, sell and rent commercial real estate in India. The real estate market in India is highly fragmented and plagued by lack of transparency. We empower businesses and individuals in India to transact commercial real estate backed by data.

YC S23
PropRise logo

PropRise

AI Operating System for Commercial Real Estate

PropRise is building the AI operating system for commercial real estate investing. We automate the entire workflow from sourcing to closing: our AI finds deals nationwide that match your criteria, then populates your Excel models with extracted data in 90 minutes instead of 4 hours. CRE teams currently waste 80% of their time on manual tasks and miss profitable deals because they can't analyze fast enough. Major firms like Colliers and Public Storage already use us to analyze 7x more deals. We're creating the first end-to-end platform that acts as the system of autonomy, intelligence, and record for the $20 trillion CRE market.

YC S24
Propaya logo

Propaya

AI commercial lease abstractions and review

Propaya uses AI to instantly abstract and analyze commercial leases - delivering clause-cited insights, linked schedules, and export-ready data in minutes. Beyond lease reviews, we empower brokers, heads of real estate, and attorneys with market benchmarks and deal evaluation tools to negotiate more effectively and efficiently.

YC W22
PropelAuth logo

PropelAuth

Team-based authentication for B2B SaaS

PropelAuth provides the right level of authentication for all stages of a company. New startups can use our hosted pre-built UIs which provide the simplest possible integration. Out of the box, our customers immediately have the same auth experience as large tech companies like Slack. As those startups grow, they can use our APIs and component libraries to pull aspects of the experience into their product. More than just authentication, we will also provide useful functions tied to a "user" or "organization", like analytics, billing/subscriptions, referral programs, etc.

YC W22
Proper logo

Proper

Reconciliation and financial operations platform

Proper provides software & APIs to help companies manage their payments data across providers. We connect banks, API providers, and networks in a single platform and provide automated reconciliation and accounting, so companies can maintain financial accuracy at scale. Our integrated financial operating system gives companies a unified back-office data platform across their services and providers. With Proper, companies can spend less time on low-level financial system infrastructure and more time focused on building for their end-users.

YC W23
Propexo logo

Propexo

Plaid for Commercial Real Estate

Propexo lets engineers build, test, and launch CRE software integrations in days, not months. We modernize the developer experience for our customers, providing clear documentation and robust infrastructure to support the needs of property owners, property managers, & proptechs.

YC W13
P

Prophecy Sciences

Predicting workplace performance through neuroscience

Prophecy is quantifying the cognitive factors that determine workplace performance -- from mental aptitude, to personality traits, to decision-making styles and interpersonal dynamics. Drawing from research across many subfields of neuroscience, we have created a suite of cognitive tests that integrate behavioral measures with sensors for collecting biosignals. The data we collect is unlike that of any existing personality or aptitude test, and gives us the unique ability to predict a tremendous number of traits, characteristics, and job performance measures. We help employers find the ideal person for a job, and we help managers optimize and motivate their teams.

YC X25
Propolis logo

Propolis

Hands off QA via intelligent browser agents.

Propolis simulates real users via swarms of autonomous browser agents that test for you.

YC W21
Prospa logo

Prospa

Banking for businesses

YC S23
Prosper logo

Prosper

AI Phone Agents for Healthcare Operations

Prosper builds AI phone agents for healthcare providers. Our agents automate manual, time-intensive workflows like patient scheduling, balance reminders, claims status checks, benefit verification, and prior authorizations. We integrate with 80+ EHRs, go live in 3 weeks, and offer a no-code interface for customization. Today, Prosper handles thousands of daily calls for dozens of providers, reducing costs by 50% and tripling productivity. We’re building the AI-first operating system for healthcare to eliminate the $200B lost to administrative overhead every year.

YC S21
Protego logo

Protego

We help companies recover lost revenue from chargebacks

Protego helps companies recover lost revenue from chargebacks. The company automates chargeback management and dispute processes. It provides real-time monitoring, reporting, and analytics on chargeback information for providing valuable insights into fraudulent consumer behavior.

YC S21
Protex AI logo

Protex AI

Computer vision that makes the industrial workplace, safer

Tl;dr: We’re building software that monitors existing cameras in the port, logistics, and manufacturing industries to ensure compliance and identify safety issues. At Protex AI, we’re on a mission to protect the industrial workforce! We’re building a proactive computer vision tool for workplace safety - empowering industrial Health and Safety (HS) teams to identify risk and danger before it becomes a problem. 🤕 The Problem: Keeping people safe at work is extremely hard. In the U.S. alone, there were over 5,000 deaths in the workplace in 2019, mainly in the heavy industry space. Serious workplace injuries cost U.S. businesses circa $62 Billion annually. Until now, safety has been reactive, someone has to get injured, and in some cases fatally before something is done about it. ✅ Problem Solved: Protex AI’s platform uses privacy-preserving camera monitoring software to provide companies with an always-on guardian angel, protecting their workforce. The platform plugs into existing CCTV infrastructure and enables HS teams to flexibly translate their document-based safety rules into the real world. Protex AI takes these rules and autonomously audits the customer’s facility to identify areas of high risk and non-compliance. HS teams can access this data via a reporting engine and use it in weekly safety meetings, external safety audits, insurance discussions, and legal claims. The tool integrates seamlessly with existing safety workflows to augment data produced by any manual incident logging system in place.

YC W20
Protobase logo

Protobase

Protobase is a 10x, next-generation spreadsheet.

Protobase is a 10x, next-generation spreadsheet. It lets you use things like sheets, grids, and formulas, with better structures like tables, queries, filters, search, sorting, and more.

YC S14
Protocol Labs logo

Protocol Labs

Protocol Labs makes internet protocols: IPFS, Filecoin, and more.

Protocol Labs is an open-source research, development, and deployment laboratory. Our projects include IPFS, Filecoin, libp2p, and many more. We aim to make human existence orders of magnitude better through technology. Some of our projects. IPFS makes the web work peer-to-peer. IPFS is a protocol for storing, addressing, and transferring data, designed to replace HTTP in many contexts. IPFS uses content-addressing to uniquely identify and link to information. IPFS is one of the leading protocols of Web3, crypto, and the decentralized web movements. IPFS serves millions of end users and tens of thousands of developers. It powers the websites and applications of small startups, large enterprises, and even blockchains. Filecoin is a decentralized storage network, designed to store humanity's most important information. Filecoin is a cryptocurrency incentivized decentralized market, where storage providers earn filecoin tokens for renting out storage space. (Think airbnb for cloud storage). Filecoin is one of the leading projects in the cryptocurrency/blockchain space.

YC W16
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Protonet

Protonet provides the easiest way for a small business to run its own…