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We grow high-purity diamond wafers for advanced hardware. Used in data centers, aircraft, spacecraft, RF electronics, power devices, and lasers, our diamond moves heat up to 5× better than copper, helping critical systems run cooler, faster, and more reliably. Diamond has spent centuries as a symbol. We are turning it into infrastructure.
Commercial CompanyHardware ManufacturingProduct ManufacturingMaterials ScienceSemiconductorsManufacturingEnergyScientific ResearchSpaceTelecommunicationsEnterprisesResearchersPhysical GoodsHardwareProduct Sales
Karate is an open-source unified test automation platform combining API testing, API performance testing, API mocks & UI testing. 1.5 million monthly downloads, used by 500+ companies including 76 of the Fortune 500, are a testimony of Karate removing friction from the developer experience (DX). We did this by making it exceptionally simple to write tests (low code), simulating end-user workflows accurately, re-using API tests as performance tests, parallel execution, and collaboration via Git. Staying true to Karate’s “LOCAL-FIRST” approach (user data remains within the customer's firewall, ensuring security and addressing any concerns), we launched the official Karate plugins (IntelliJ and VS Code) for frictionless onboarding, simplified installations, configuration, and maintenance. Our plugins include all Karate open-source features, including exploring of APIs, and premium features (testing for Async APIs, API documentation, API data importer and more).
Commercial CompanySoftware Applications
Karmen is an AI scheduling assistant for construction. Karmen builds your baseline schedules from project documents, and updates them as your project evolves, saving you time and potential delays.
Commercial CompanyApplicationsSoftware ApplicationsConstructionEnterprisesHosted Software
Canadians have not benefitted from fintech innovations in the last 10 years. They are stuck with a banking oligopoly and limited access to tech-first financial offerings (a lot of products still require you going to a branch in person!). We're fixing this.
Commercial CompanyFinancial ServicesFinancial ServicesConsumersHosted SoftwareInterest Income
Kashikoi is a simulation engine to benchmark AI agents. We generate CPU friendly world models that autonomously interview agents and generate deep behavioral assessments. We built a similar technology at Moveworks which was used to ship 250+ enterprise agents to customers daily.
Commercial CompanyAgentsModel EvaluationWorld ModelsSoftware Development
Credit for the emerging economy in Latam. We have 10K users and nearly $2M in annualized revenue, from our small loans to micro-merchants and individuals in the informal economy. We do our underwriting with our proprietary AI risk model processing 250+ variables from the user's smartphone and credit bureau.
Commercial CompanyFinancial ServicesFinancial ServicesConsumersSmall Businesses
Field technicians are bad at documenting their jobs, which paralyzes the back office. Kebra ends that. We capture what happens in the field and collect the exact job details the back office needs. Before the truck leaves the driveway, Kebra turns every job into complete notes, filed warranty claims, parts orders, and follow-up sales opportunities. Over time, every job feeds your Company Brain, so your best technicians’ expertise never leaves the company.
Commercial CompanyApplicationsSoftware ApplicationsAgent ToolingHome Services
Keet provides authentication for AI agents. Developers use us to connect their customers accounts and perform actions on their behalf. Whether it be legacy software or consumer sites, Keet manages your users authenticated sessions and provides stable integrations on any web platform. Now your AI Agent can access healthcare data or send automated messages on LinkedIn via Keet’s API or SDK.
1-50 employeesJobs (yc) ↗
Commercial CompanyEducationSoftware ApplicationsEducationConsumersStudentsHosted Software
KemNet supplies pharmacies with premium reformulations of popular drugs that are more useful for specific groups of patients. For example, more than 30 pharmacies rely on KemNet to supply reformulated products for erectile dysfunction that work up to 8 times faster than alternatives. In addition to sexual function, products reformulated for novel drug delivery and supplied on KemNet include medications for hair growth, pain, weight loss and women's health.
Commercial CompanyMarketplace OperationHealthcareEnterprisesSmall Businesses
Kenley is an AI platform for consulting firms. It connects information siloed across decks, meeting notes, and operational systems into a unified search experience, letting consultants surface precedent from past work, find subject-matter experts, and reference prior deliverables. The platform also captures and synthesizes expert interviews and client sessions into themes and recommendations traceable to sources, supporting workflows such as drafting proposal decks and due diligence research.
Commercial CompanyApplicationsSoftware ApplicationsCross Industry
Kenobi is personalizing the internet. Your marketing site is your front desk to the internet, but its content has to be applicable to all of your ICPs and potential visitors, usually resulting in fragmented and blunt brochure content. Kenobi acts as your concierge, ensuring each of your visitors receives content that is tailored to _them_ so that they actually convert and progress along your sales journey. You can install Kenobi with one `<head />` tag in your site's markup -- everything else is taken care of using our AI research + content generation pipeline.
Commercial CompanyApplicationsSoftware ApplicationsCross Industry
Kerna Labs is an AI biotechnology company that develops foundational machine learning models to design and optimize novel mRNA therapeutics. They target the genetic medicine market by addressing payload design and delivery bottlenecks to create potent and safe medicines. The company leverages a combination of AI and high-throughput biology to decode RNA biology.
1-10 employeesCareers page ↗
Commercial CompanyAI for scienceModel DevelopmentScientific ResearchBiotechnologyLife SciencesEnterprises
Kestral makes it clear what your customers want most, prioritizes those tasks for highest leverage, and closes the loop with those customers. We (Brian and Bernard) have been close friends since university, and most recently worked together at Asana, leading AI and Authorization efforts. There we realized AI can completely disrupt the $50B Work Management Market, but it required a fresh start. What work we even choose to manage in the first place is critical, and the most important insights from customers are silo-ed in sales/CS while R&D gives their best shot at roadmaps meant to deliver impact. Significant requests sit in a backlog, duplicate asks flood the system, months wasted on "strategic investments". We want to bridge this gap. This message is resonating with heads of sales, heads of product, CEOs, as well as individuals, all trying to make sure the most important things get done, with less wasted effort and more revenue/retention. Kestral works by automatically take in customer data like sales call transcripts & feature request messages and a team of agents: 1. analyze them for actionable takeaways, deal blockers, and nice to haves 2. consolidate them and manage all the asks with citations 3. prioritize them by impact and frequency to cut through the noise so you can see the biggest opportunities clearly 4. connect them to your existing strategic roadmap so when the work gets done, we can automatically follow back up with your customers and win them over This is just step one of our mission to revolutionize how work gets done -- starting with what we choose to work on, and hope you follow us along for the ride!
San Francisco, CA, USA1-50 employees
Kestrel is an AI-native cloud incident response platform that brings self-healing to cloud infrastructure. It monitors cloud and kubernetes infrastructure 24/7, finds root causes, and generates exact fixes - so incidents get resolved in seconds instead of hours.
Commercial CompanyAgentsSoftware ApplicationsAgent ToolingSoftware Development
Our real-time foundation models turn AI into lifelike video calls. Add the world's best AI avatars to your agents and applications in minutes with a few lines of embed code. Photorealism, emotion, and scale for as low as $0.06 per minute.
Commercial CompanyApplicationsModel DevelopmentInference ServingComputer Vision
Keylika is an early stage biopharma startup developing metal-based drugs using a platform synthesis technology to treat unmet medical needs. We then administer these drugs using proven delivery technologies to effect the best clinical outcomes. Our first product is a small molecule iron drug (new molecular entity) delivered by a wearable skin patch to treat Iron Deficiency Anemia (IDA), with significantly higher safety, efficacy and tolerability over existing treatments. This is poised to be a best-in-class, potentially breakthrough therapy for treating iron deficiency without any GI side-effects (eg. nausea, constipation, diarrhea, etc.) typically associated with oral iron supplements, and without the risks, costs and side-effects associated with IV iron infusions. When approved, Keylika’s proprietary transdermal iron will be the world's first prescription iron patch. Iron deficiency is a hugely understated problem affecting about 1.6 billion people worldwide and more than 30 million in the US alone, translating to a $17B US market.
Commercial CompanyScientific Research
Khoj is an applied artificial intelligence company. We're a tiny team of hackers doing applied research and building safe, useful ai software for humans.
Commercial CompanyApplicationsSoftware ApplicationsCross IndustryConsumersOpen Source
In investment management, the final outcome isn't a deck or a memo. It's the trade. Kimpton is the AI-native research platform for portfolio managers. We're commoditizing the research layer and handing PMs data distilled into structured trades. The whole industry is fighting underperformance. Active managers trail their benchmarks, and capital keeps bleeding into passive. AI was supposed to fix that, but it hasn't. Funds either stitch together a dozen point tools or babysit general agents all day, and neither gets them to the trade. Kimpton goes straight to it. It ingests a fund's mandate, strategy, and positions. It runs them through our own harness and returns a structured trade proposal built for that fund. It connects to any institutional data source they already run on. And it's built to disagree, because consensus is poison for investment decisions. Instead of telling a PM what they want to hear, it surfaces the breaches and risks they'd otherwise miss. We're two ex-Goldman engineers and an ex-SpaceX engineer. We left to start our own quantitative systematic hedge fund. We raised $10M from a family office at 21 and 22, and scaled it to $35M over four years. We built Kimpton inside that fund, then productized the stack. We're live with our first institutional client, a $3.3B manager, and our first market is fundamental equity funds from $1B to $10B. Humans make the decisions. Kimpton does everything else.
Kirana AI is building the first full-stack AI store manager. With 100 years of family experience owning and operating grocery stores, we are starting there to prove our impact. Our first product utilizes an on-premise GPU that monitors the store 24/7, scans for theft, looks for workplace health and safety issues, and optimizes customer service. With future POS/ordering data integrations, our manager will automate many of the day-to-day tasks of running a store, such as ordering, pricing, assortment, and delegating.
Commercial CompanyApplicationsSoftware ApplicationsComputer Vision
In emerging markets, open finance is still nascent. Most of the population is traditionally unbanked, banking APIs don’t exist, and a borrower’s financial history lives in documents: e-wallet records, bank statements, utility bills, and more. Because this data is unstructured, credit and risk teams are forced into manual review. This slows decisioning, increases costs, and caps lending volume. Kita is the AI platform for global lending operations. We help lenders in emerging markets automate application completion, document verification, and underwriting from messy financial documents — using AI to extract fraud-checked data and localized risk signals that power faster, better credit decisions. Under the hood, Kita is a learning engine. We link document-level signals to repayment outcomes, allowing our models to continuously improve fraud detection and risk assessment over time. This creates a compounding advantage for lenders as their distinct underwriting decisions feed back into the system. We’re Carmel and Rhea. We met before Stanford and have been building together ever since. Carmel is from Manila, is a repeat founder, and spent three years in product at Apple. Rhea has a research background in computer vision and received the highest honor in Stanford Computer Science. Together, we combine deep local context with strong technical execution to build the infrastructure that expands access to credit in emerging markets.
In emerging markets like the Philippines, open finance is still nascent. Most of the population is traditionally unbanked, banking APIs don’t exist, and a borrower’s financial history lives in documents: e-wallet records, bank statements, utility bills, and more. Because this data is unstructured, credit and risk teams are forced into manual review. This slows decisioning, increases costs, and caps lending volume. Legacy OCR solutions break on noisy, real-world files and still require human verification. Kita is the first document intelligence platform built specifically for lending. We are hyperlocalized around the signals that actually drive lending outcomes in emerging and undertapped domestic markets like the Philippines, Indonesia, Mexico, and beyond. Using a layered system led by vision-language models and computer vision, we outperform traditional OCR by transforming messy borrower documents into fraud-checked, decision-ready signals lenders can use directly in underwriting. Under the hood, Kita is a learning system. We link document-level signals to repayment outcomes, allowing our models to continuously improve fraud detection and risk assessment over time. This creates a compounding advantage for lenders as their distinct underwriting decisions feed back into the system. We’re Carmel and Rhea. We met before Stanford and have been building together ever since. Carmel is from Manila, is a repeat founder, and spent three years in product at Apple. Rhea has a research background in computer vision and received the highest honor in Stanford Computer Science. Together, we combine deep local context with strong technical execution to build the infrastructure that expands access to credit in emerging markets.
San Francisco, CA, USA
Kite is a screen recorder that makes your demo videos look like Apple commercials in minutes. Simply record your app (works for iPhone recordings too!). Kite will track your cursor and keyboard inputs, so it can automatically zoom in on the action with professional 3D animations. Kite is as easy as Canva, but your videos will look like they came out of OpenAI or Figma. - One-click cinematic 3D animations - Display recordings on 3D mockup devices (MacBooks, iPhones etc) - Combine unlimited recordings into one video - Edit, adjust speed and trim recordings - Add text scenes and text annotations alongside recordings - AI voiceovers using state of the art text to speech models - Free music library - Brand kit–upload your logos, colors and fonts - Start from our template library or start from scratch Kite is used by hundreds of YC companies for launch videos, social media posts, landing page demos, changelog updates, feature releases and more.
Commercial CompanyApplications
Kite AI is building the agentic internet’s foundational infrastructure: a Layer 1 blockchain and ecosystem that enables autonomous AI agents to identify, transact, and govern with verifiable identity, programmable governance, and native stablecoin payments across an open, interoperable network.
Commercial CompanyAgentsFinancial ServicesAgent ToolingSoftware Development
Kling AI is an AI-powered creative studio that builds high-resolution generative video and image tools using a diffusion-based transformer architecture. It serves a global client base across marketing, e-commerce, and entertainment, monetizing via subscription credits and API packages. Its key differentiator is the ability to generate high-fidelity videos up to two minutes long with strong temporal consistency.
Applications
Everyone loves the way 3Blue1Brown explains complex ideas. Now imagine having that same level of clarity for any topic, tailored to each learner’s needs. That’s what we’re building at Knowlify. Current use cases: - Researchers turn dense papers into clear, digestible explanations - Textbook publishers help students grasp challenging concepts - Universities produce high-quality content while cutting costs by 90% - Corporations keep teams sharp and up to date on the latest technologies With Knowlify, the possibilities for learning are limitless.
Commercial CompanyApplicationsSoftware ApplicationsContent Production
PROBLEM 😩 Zoom is great for adults, not ideal to engage an 8 year old online. SOLUTION 🔥 Koala Go, the award-winning interactive platform for online teaching businesses. Learn more at https://teachwithkoala.com/
Commercial CompanySoftware ApplicationsMarketplace OperationEducationSmall Businesses
We provide free digital mental health technologies for millions of people struggling online — particularly young people. For example, we partner with online communities to help find and treat at-risk individuals directly on their platform.
NonprofitHealthcare DeliveryScientific ResearchHealthcareConsumersHosted Software
Kontext is an AI-native advertising platform that serves real-time, context-based ads inside GenAI applications and chatbots, enabling brands to monetize conversational moments with large language model-powered creatives.
Commercial CompanyApplicationsMarketplace OperationSoftware ApplicationsMedia
Kopra Bio makes genetically engineered viruses that teach your immune system to kill cancer using tech we developed at UCSF. We’re making the next Keytruda ($25B/yr cancer drug blockbuster) starting with the most aggressive form of brain cancer, glioblastoma. In the most challenging brain cancer model, we improve survival from 0% with the current FDA approved treatment to 90% with our treatment.
Commercial CompanyScientific ResearchBiotechnologyLife SciencesConsumers
Check out our first product at https://www.korsoai.com/shepherd (agent collaboration tool for coding, so you never face merge conflicts or agents rewriting each other again)
Commercial CompanyAgentsSoftware ApplicationsAgent ToolingManufacturingEnterprises
We provide simple, well-documented, and fully compliant payments APIs and interfaces so that any company can instantly start leveraging crypto to offer services like remittances, USD wallets, and investments.
Miami, FL, USA; Santiago, Santiago Metropolitan Region, Chile; Mexico City, CDMX, Mexico; Remote1-50 employeesCareers page ↗
Commercial CompanyFinancial ServicesSoftware ApplicationsFinancial ServicesEnterprises
Krave Mart is the Rappi for Pakistan. We’re an online grocery store that delivers within minutes.
Commercial CompanyRetail OperationsLogistics ServicesRetailConsumersPhysical Goods
Kular is an AI Lead Generator, generating leads for busy professionals and business owners and only charging for results. Today, Kular generates leads for over 1000 companies via email and LinkedIn. Kular is being built by a team of MIT, IIT, Cambridge and Oxford grads, backed by some of the best investors in the world, including Y-Combinator, Entrepreneur First, Acequia Capital and angel investors behind companies like Ironclad, OpenSea and Stripe.
Commercial CompanyAgentsSoftware ApplicationsCross IndustrySmall Businesses
Kura breaks 87% on the WebVoyager Benchmark. That is 31% better than Claude's Computer Use demo and 14% better than the previous State of the Art. In 10 years there will be more AI agents on the internet than humans. Kura is SOTA for giving AI agents the tools for interacting with websites.
1-50 employeesJobs (yc) ↗
Commercial CompanyAgentsSoftware ApplicationsAgent ToolingComputer VisionCross IndustryEnterprisesHosted Software
The best investments come from conviction, and conviction comes from understanding a market deeply: its customers, its competitors, and where it's heading. Today that understanding is slow and expensive to build. Reaching the right people takes weeks, a commercial study costs $300k+, and each one starts from scratch. LATO does this research end-to-end, combining public data and the fund's own knowledge with first-hand interviews of a market's customers, experts, and operators. This research grounds a simulation of the market to predict how market participants behave.
Commercial CompanyAgentsSoftware ApplicationsAgent Tooling
Enterprise software implementation is broken, and it has been for decades. Every rollout, whether it's a traditional ERP or a new AI system, requires months of manual integration, configuration, and tuning done by armies of system integrators and forward-deployed engineers. Lab0 builds agentic systems that automate this layer, compressing months-long implementations into weeks.
Commercial CompanyAgentsSoftware ApplicationsSoftware DevelopmentEnterprises
Lakonia is building an AI-powered command and control platform for law enforcement and the military. Our AI transcribes radio communications, analyzes them, and then synthesizes information for commanders/dispatchers and operators to act on.
Commercial CompanyApplicationsSoftware ApplicationsSpeechGovernmentDefense
Query, trace, and validate datasets and models at scale. Automate context for agents and humans. One API: lakehouse, lineage, feature store, ontologies, bio-registries & formats.
1-50 employees
Commercial CompanySoftware ApplicationsBiotechnologyData EngineeringLife SciencesEnterprisesResearchersOpen SourceHosted SoftwareOn Premise Software
Lamina Labs is building infrastructure for near-real-time structured video generation. Most AI video is built for cinematic clips. Lamina is built for useful videos that teach and explain. Our first product, Simi, turns prompts, documents, and AI answers into whiteboard-style teaching videos in seconds. Our goal is to make video the default interface for AI communication.
Commercial CompanyApplicationsSoftware ApplicationsMediaEducation
Laminar is open-source observability for AI agents. Trace complex workflows, replay and debug agent runs, and detect anomalies across trajectories at scale.
Commercial CompanyAgentsSoftware ApplicationsModel EvaluationSoftware DevelopmentDevelopers
Laminate is a card issuance platform for designing, manufacturing, and fulfilling physical debit and credit cards. It works alongside existing card issuing infrastructure, letting fintechs and financial institutions run physical card programs without changing their issuer or processor.
Commercial CompanyProduct ManufacturingLogistics ServicesFinancial ServicesEnterprisesPhysical Goods
Lantern learns what exceptional looks like for your team, pressure-tests the role against the real talent market, then runs the hiring loop: sourcing, inbound applications, interviews, assessments, candidate communication, and offers.
San Francisco, CA, USA1-10 employees
Commercial CompanySoftware Applications
Lapis helps businesses run ads on Meta, Linkedin, and Google.
Commercial CompanyApplicationsSoftware ApplicationsProfessional ServicesRetailSoftware Development
Lark lets teams write end-to-end tests in plain English. Validate dashboards, APIs, SDKs, and full product flows without maintaining fragile test code. Run continuously on feature branches, in CI, or in production.
Commercial CompanySoftware ApplicationsSoftware DevelopmentDevelopersEnterprisesHosted Software
Last Accounting Company (LAC) is a full-stack AI accounting firm. We sell the same service (bookkeeping, tax filings, etc.) as a traditional accounting firm, but underneath agents handle everything and a certified accountant signs off. Our service is faster, cheaper, and fully integrated, allowing our clients to focus on what matters, not accounting admin. LAC replaces both outsourced accountants and legacy accounting software for startups and SMBs. Our system is fully proprietary, from the general ledger to the accounting agents. This allows us to create powerful self-reinforcing loops and ultimately provide a state-of-the-art accounting service.
Commercial CompanyAgentsFinancial Services
Latent Space develops AI applications specifically designed to address the unique challenges and opportunities in emerging economies. Our products are Halo AI (an AI universal concierge for SEA enterprises), GoVisa (an AI-enabled online visa and permit application), and Supa (a hyperlocal knowledge AI for 280M+ Indonesians).
Commercial CompanyApplicationsSoftware ApplicationsCross IndustryEnterprises
Lattice Health monitors deployed medical imaging AI so hospitals can tell whether each model is still working, tracking agreement with the radiologist's read, drift, and performance across patient groups. It observes rather than controls and produces the evidence teams need for safety, governance and compliance.
Commercial CompanyApplicationsModel EvaluationSoftware ApplicationsAI Governance
Lavender is a cloud and AI-powered platform that provides AI-driven email coaching and content personalization to sales teams, enabling better email performance and ROI. It combines historical email analysis with AI recommendations and integrates with tools like Ora for outbound email optimization.
New York and Atlanta$14.2M11-50 employees
Commercial CompanyApplicationsSoftware ApplicationsCross IndustryEnterprisesSmall Businesses
When bad software gets shipped, software companies burn a lot of money and customer trust fixing it. Most software engineers will tell you they spend more time fixing code than writing it, which will only become more true as AI code assistants gain adoption. Leaping autonomously root causes bugs and generates tested code fixes.
Commercial CompanyAgentsSoftware ApplicationsSoftware DevelopmentDevelopers
LedgerUp is your AI billing teammate for B2B SaaS, transforming contract-based billing from a chore into a frictionless, revenue-accelerating process. We parse contracts, issue invoices, and collect payments in real-time, all while surfacing actionable analytics, allowing your finance team to escape spreadsheet chaos and focus on strategic growth. Just close deals and let us handle your billing for you.
Commercial CompanyAgentsSoftware ApplicationsSoftware DevelopmentEnterprises