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Unthread is an AI-powered helpdesk built natively into Slack. We help companies to automate the creation and resolution of tickets right from a Slack channel. We work with IT, HR, and CX teams at some of the world's largest companies to resolve tickets instantly using AI.
New York, NY, USA1-50 employees
Unusual helps brands discover and change how AI models talk about them. Unusual surveys models with thousands of targeted probing questions to understand how they form their opinions. We examine the sources they pull from, and find patterns in their reasoning, that let us create content and PR engineered to change those models’ minds. A typical Unusual customer sees more than a 40% increase in traffic from AI models within a month of going live. Beyond driving more traffic, customers have used Unusual to shift models’ perception of their brand from “niche” to “enterprise-platform”, from “scrappy” to “customer-obsessed”, and from “good for startups” to “a solid bet for the middle market”. We work with top companies including Reducto, Monarch Money, and more.
San Francisco, CA, USA1-50 employees
UpBanx is Brex for D2C brands and content creators in Indonesia. We help our customers open a high-yield business account, get financing, manage transactions, and launch Web3 projects, all in one place. There are over 700k D2C brands and content creators in Indonesia. If we serve all of them, that is a $14b/year market opportunity. We've raised $5.6m so far from investors like Y Combinator, Alpha JWC, Alto Partners, CreditEase, Oliver Jung and lndonesia's biggest influencer Raffi Ahmad who has over 100m followers on social. We have also raised from 6 other Y Combinator founders. We are open to working with more investors that can bring strategic value to our long-term roadmap.
Jakarta, Jakarta, Indonesia; Remote1-50 employees
UpLink's founding team worked as auditors and software engineers at PwC where they saw firsthand how difficult it was to collect thousands of documents from clients. Alex Maher and Alex Grant met working on PwC’s big data analytics platform, scaling it from 0 to 20k users globally. Brady and Nick met while studying CS at a top 5 public university, but still insist they were self-taught. They were, by far, the top developers on Alex Maher’s team before starting UpLink. Together they ran Dycom's field systems segment, supporting 15k users.
Palm Beach Gardens, FL, USA; Washington, DC, USA; Remote1-50 employees
Upfront is a personal assistant for home projects, powered by AI and partnerships with local businesses. Instead of sifting through reviews and playing phone tag, homeowners text us, and we connect them with a curated set of home service professionals in their neighborhood.
San Francisco, CA, USA1-50 employees
Uplane replaces marketing agencies with AI. We generate hundreds of ads with matching landing pages and steer the ad spend across channels like Meta, Google, LinkedIn and others. By connecting to CRM and ERP data, Uplane learns what drives profits and continuously improves campaigns. Companies waste billions on bad ads, mismatched landing pages, and poor budget allocation. Uplane fixes this by replacing a patchwork of agencies, spreadsheets, and siloed tools with one self-improving system. The result: Higher ROAS for enterprises and effortless, expert-level marketing for SMBs.
San Francisco, CA, USA1-50 employees
We build Voice Models for regional languages (like Urdu, Bengali, Greek etc) and make them available through simple APIs and SDKs. Developers use us to create Voice-first digital experiences (eg. Voice eCommerce, Voice Banking, Voice AI Tutors etc). We gather our own data, develop our own labelling tools, train our own models, and design our own voice infra. This fully integrated approach enables us to offer the best models and the best developer experience for regional languages. --- People who would previously never use certain digital services (like online ordering), actually use the service when they are given an intuitive Voice based interface. We believe that Voice Interfaces will onboard 100s of millions of new users onto digital services; and double the addressable market for technology companies. Uplift AI will provide the best models to create these Voice Interfaces for 60% of the world's population that only speaks their regional language and represents 42 trillion dollars in GDP.
1-50 employees
Upsolve AI is a customer-facing analytics as a service platform. We are building a full data stack that enables businesses to build and offer analytics to their customers at lightning speed and gives their customers the superpower to answer any data questions via AI. The company is founded by Ka Ling Wu and Serguei Balanovich, who built a similar product at Palantir before (featured in Palantir's S-1), growing it to 50+ enterprise customers and 8-figures of annual revenue in 2 years.
1-50 employees
Upstream is a modern email client designed to make email feel human again. It drafts replies in your exact voice using prompts you control, so you can fly through your inbox with a calmer, more enjoyable experience.
1-50 employees
Usul helps companies win government contracts in 60+ nations. Our AI monitors $8 trillion in annual government spending and instantly matches you to contracts across defense, IT, energy, healthcare and more. Learn more at https://usul.com/
San Francisco, CA, USA1-50 employees
VOYGR helps AI apps and agents understand and act in the real world with comprehensive place data. Unlike static mapping APIs, VOYGR combines accurate place intelligence with fresh web context – news, articles, and events. Real-world interactions rely on maps: 10M+ apps/websites, up to 40% of search queries, and 20% of LLM prompts need local context. Yet a restaurant recommendation can fail because the place is closed, menus aren’t searchable, or delivery goes to the wrong entrance. AI pushes expectations further – answering semantic prompts like “specialty coffee shops in SF with Wi-Fi and YC founders", and taking actions like making reservations or placing orders. We’re experienced builders in maps, search, and ML to solve this. Vlad knows this space inside and out – he worked on the Google Maps APIs GTM, plus firsthand customer experience from building in ridesharing and travel. Yarik has spent over a decade leading ML/search teams at Apple, Google, and Meta. Several customers already run VOYGR to continuously validate places data accuracy at scale, and we outperform on accuracy and coverage. Maps were built for humans browsing pins; agents need continuously updated place ground truth they can act on – from copilots and in-car assistants to delivery robots and AR. As agents become the interface to commerce and services, VOYGR aims to be the default ground-truth layer.
VacationHomeRents helps users explore and compare vacation rental options across many listing platforms such as Airbnb, VRBO, Booking.com, etc.
Seattle, WA, USA; Remote1-50 employees
Vaero's AI produces the most human sounding writing in the world. User's input their own writing, and Vaero automatically trains custom models to write exactly like the user. It writes emails, reports, brand content, and anything else. Vaero bolts on to any existing foundation model, such as GPT-4o and Claude Sonnet 3.5, so you can always use the latest model in your writing style.
San Francisco, CA, USA1-50 employees
At Valari, we are on a mission to democratize access to financial services in LatAm, by allowing any company to launch fintech products and services. With our simple APIs, tech companies can easily embed a financial product in their platforms.
Mexico City, CDMX, Mexico; Remote1-50 employees
As autonomy moves into complex safety-critical domains (e.g., aviation), failures become more costly and companies must devote significant in-house effort to validate their system before real-world deployment. Valgo accelerates autonomous systems development and certification by providing tooling to perform algorithmic safety validation at scale. We are building a platform to efficiently find rare and realistic failure events in simulation at a fraction of the compute cost required by existing approaches. Our tools are agnostic to models/simulators (i.e., black box) and can be applied across industries such as autonomous vehicles, aviation, robotics, space, defense, energy, and finance. Valgo was founded by Stanford PhDs who wrote the textbook and taught the course at Stanford on algorithmic safety validation. We also have significant industry experience working on an FAA-certified collision avoidance system at MIT Lincoln Laboratory, validating autonomous aircraft at Xwing, and collaborating with industry sponsors across transportation, aviation, and energy.
San Mateo, CA, USA1-50 employees
Property appraisals suck — September’s new federal rules will make them even worse. ValueMate’s LiDAR-plus-AI app captures a property in a three-minute walkthrough and delivers a regulator-ready report on our dashboard, slashing cycle times by 80% for the valuation firms already on board. In the next few months, every bank, AMC, and independent appraiser must switch to the new format or watch loans pile up. ValueMate handles the transition end-to-end, with zero tape measures, zero data entry, and zero closing delay. We’re transforming the multi-billion dollar appraisal industry with technology that captures millions of 3D data points per walkthrough.
1-50 employees
We built Vango excited by the future where generative visual AI models like stable diffusion dramatically reduce the barrier to create content. While spending 8 months building products for creatives, we found ourselves building hacky tools to address many of frustrations we had with visual AI. So we decided to build the devtool we needed: Vango is a flexible evaluation platform that makes it 10x improve visual models. Developers using visual AI models at scale use Vango to learn quantitative ways to improve their model, saving them ~10 hours per week. Major companies building visual products have already begun integrating diffusion models, including Adobe, Disney, Activision Blizzard, Canva, and Snap. By 2025, it is estimated that 1 billion images per day will be AI-generated.
Berkeley, CA, USA; San Francisco, CA, USA1-50 employees
The goal of Vantedge AI, formerly known as 8vdx, is to provide an Agent Marketplace of curated agents to enable investors to get an investing edge to generate alpha by leveraging AI. Our insight to build this marketplace comes from our experience from running a credit hedge fund for 15 years and as a Y Combinator backed startup, we understand the complexities of AI and are here to offer a complete infrastructure to funds and startups alike. Our platform is built to serve the investment community with the highest security, compliance, and infrastructure tailored for institutional investors.
Norwalk, CT, USA1-50 employees
Build safer platforms with Intrinsic. Get access to the best safety technologies from one unified API. Enable your Trust & Safety team to tell cohesive stories from policy to product, to enforcement. Michael and Karine first met two years ago at Apple’s Fraud Engineering, Algorithmic Risk team, which evolved to become Apple’s Trust & Safety function. We are both engineers and helped solve online abuse problems, including spam, botting, account security, and developer fraud for Apple’s customer base of over a billion users.
San Francisco, CA, USA1-50 employees
We build home humanoids the practical way—an open, mass-produced developer kit powering a real-home teleop data flywheel to autonomy, giving families back 20 hours/week.
San Francisco, CA, USA1-50 employees
Vaultpay is building a digital banking platform for 30 million smartphone users in DRC and the country's largest agent network. For example, a young Congolese entrepreneur who just won a subcontract with a major mining company can now easily open a personal and business account, receive payments, all from their smartphone, instead of spending hours at bank branches.
Kinshasa, Kinshasa, Democratic Republic of the Congo1-50 employees
We make it easy for real estate developers in LATAM to sell new properties and close mortgages, unifying the experience, so home buyers can buy a home in just a few steps and without the need to look for more intermediaries. We do it all online: selling homes and approving mortgages is 6x faster.
Medellín, Antioquia, Colombia51-200 employees
B2B advertising is broken: poor targeting, wasted ad spend, bot traffic, and 3rd party-cookies. Vector helps marketers drive pipeline with contact-level targeting and revealing who's seeing your ads (even if they never convert).
Boston, MA, USA1-50 employees
A modern solution for Startup legal: Vector Legal is a hybrid AI law firm + legal tech platform. Our customers benefit from state of the art software for their legal operations + an experienced lawyer-in-the-loop. Services: fundraise & priced rounds | customer contracts | team growth & equity | AI draft & review | agentic data room | e-signatures | contract intelligence | legal health checks | mergers & acquisitions | co-founder separations | company formation.
San Francisco, CA, USA1-50 employees
VectorShift is an AI automations platform. Teams leverage AI through VectorShift’s no-code or SDK interfaces to search through knowledge bases, generate documents, and deploy chatbots and assistants. The no-code platform gives end-users an interface to access pre-built workflows for end use cases (e.g., responding to RFPs, writing proposals, writing account plans) while letting them customize and build new ones with drag and drop components.
1-50 employees
Vela is the AI Scheduling Assistant built to handle the ambiguity that breaks scheduling. It has taste: it knows to prioritize a client over an internal catch-up, and it understands "Let's do early next week" without setting specific parameters. You just add Vela to the conversation, and it handles the white-glove negotiation as a member of your team, even at scale. Today, Vela is already used by professionals with the most complicated scheduling workflows. Enterprise recruiters are using Vela to schedule thousands of multi-party interviews and large sales teams rely on Vela to coordinate cross-functional calls.
San Francisco, CA, USA1-50 employees
Are you trying to run a hybrid sales motion, but Stripe is limiting your ability to bill your custom contracts? Most of us start on Stripe because it’s the default for self-serve. But as soon as you move into Founder-Led Sales, you hit a wall. When an enterprise customer asks for a ramp-up period, tiered usage, or a custom quarterly billing schedule, Stripe’s standard checkout breaks. You end up with "Billing Debt" - a mess of manual invoices, spreadsheets to track renewals, and "hacked" subscriptions that will eventually require a painful migration. We built Veles to be the sales-led billing layer for Stripe. It’s the flexible "Deal Desk" that lets you sell exactly how your customer wants to buy, without the manual overhead. The Problems We Solve (So You Don't Have To): ✅ Complex Pricing & Logic: Whether it’s usage-based, flat-fee hybrids, or "draw-down" credits, if you can dream up the pricing logic, Veles can bill it through your Stripe account. ✅ Custom Deal Structures: Close deals with custom ramp-ups or non-standard terms without manually editing Stripe objects. ✅ Deal Desk & Approvals: Set guardrails so your first sales hires can’t go rogue on pricing. Build a repeatable approval workflow for every contract. ✅ Presentation Flexibility: Your quotes should look as professional as your product. Veles generates quotes as Web Portals, Slides, Docs, or PDFs—all while staying perfectly synced to your backend. The YC Offer: I want to make sure no YC founder is held back by their billing infrastructure. Current Batch (W26): Veles is 100% Free for your entire founder-led sales phase. Focus on hitting PMF and closing your first 20-50 deals; we’ll handle the "Deal-to-Cash" automation. YC Alumni: 50% off the Growth Plan for one year. Scale your sales team and automate your revenue operations without the "Enterprise CPQ" price tag. Stop forcing your custom enterprise deals into rigid billing templates. Sell what the customer wants, and let Veles keep your Stripe account clean. I’d love to hear from anyone currently fighting with Stripe’s "manual invoice" button. What’s the weirdest contract structure a customer has asked you for lately?
Santa Barbara, CA, USA
Velontra is building a hypersonic space plane that can takeoff from anywhere in any weather. This horizontal takeoff increases launch reliability and enables customers to directly access any orbit. Our air-breathing propulsion system is up to 6 times more fuel efficient than any rocket, and uses oxygen from the air which creates thousands of pounds of additional payload capacity. We have millions in current government/commercial contracts and LOI’s. We have assembled a team of industry experts, government senior executives, and a NASA astronaut. The hypersonic space plane will work by taking off from any runway with a jet propulsion system. Next, it will climb to over 100,000’ and Mach 5. At this point, it will launch a 2nd stage rocket directly into the desired Low Earth Orbit. Velontra is “boldly going where no one has gone before.”
Cincinnati, OH, USA1-50 employees
Velorum Therapeutics is developing breakthrough medicines by unlocking the biology of heme.
San Francisco, CA, USA1-50 employees
Velos helps non-technical operations teams automate complex, manual back-office tasks with AI workers instead of overseas teams. Unlike traditional robotic process automation (RPA) platforms like UiPath, Velos automations use machine learning to reliably handle ambiguities in their tasks, eliminating the need for an army of maintenance engineers and consultants to build and maintain your automations. We're automating the repetitive work people hate to do.
San Francisco, CA, USA1-50 employees
Our mission is to make the web more collaborative. We're not just making collaboration faster—we're crafting it to be the best. Today we’re all using online platforms more than ever before - building, researching, learning, connecting etc. And we're not doing it alone. We're doing it together with other people and machines, turning the internet into the world's biggest team. Yet, the web was built for solo voyages. We saw a shift when platforms like Figma and Google Docs brought a multiplayer approach, breaking down walls and inspiring seamless teamwork. At Velt, we're taking it further. We're on a mission to infuse the magic of collaboration into the fabric of the web—one app at a time. We aim to erase the lines between online and offline co-working, crafting an environment where distance is irrelevant, and 'flow' is the norm. Right now, more than half of work hours are spent on coordination and communication—less on creating. With Velt, we're setting out to reverse these figures, reducing time spent on logistical issues by over 90%. Imagine what we can create when we spend less time talking about work and more time doing it! We're building a better web—a web for us, for our team, for everyone. Join us, and let's accelerate the future of web together 🚀 Our Products: - Velt Collaboration SDK (https://velt.dev/): JS SDK to add powerful collaboration experiences to your own product for your end-users. This helps you ship such experiences ridiculously fast, increase user growth and engagement. - Superflow (https://usesuperflow.com/): JS plugin to enable product, marketing and design teams to comment and collaborate directly on their websites. This helps them iterate and ship their products 10x faster. We’re a team of ex-Googlers. We've launched products like Augmented Reality in Google Search & Maps. Come build a better web with us 🚀
San Francisco, CA, USA1-50 employees
Velum is an open-source firewall for content-level access control across documents, databases, and applications. Admins define policies, and we apply them in real time across your entire stack to control what each recipient sees. Our firewall sits between your data sources and consumers (LLMs, users, vendors), enforcing policies on every request. We understand meaning in text, documents, and databases to detect sensitive information based on your policies, then apply recipient-specific controls without blocking workflows. Create policies in natural language. Teams write rules that define what's sensitive and who should access it, and Velum enforces them consistently across all systems. When authorization changes, we can reveal tokenized data just-in-time for approved recipients, maintaining both security and utility. We integrate directly into your existing infrastructure. For AI workflows, we intercept prompts, responses, and retrievals to prevent sensitive information from leaking into or out of models. For enterprise systems like Salesforce, SAP, or Workday, we extend policy enforcement to exports, reports, and syncs. Velum is designed for scale and compliance. We provide encryption and structure-preserving tokenization for high-throughput pipelines, with multi-cloud deployment options and configurable data residency per tenant to meet your compliance requirements.
San Francisco, CA, USA1-50 employees
The platform where frontier research labs buy data for world models.
San Francisco, CA, USA1-50 employees
Vendah is building a Faire-style marketplace for LATAM’s +50M informal sellers — offering access to trending beauty and wellness brands, powered by embedded credit.
São Paulo, SP, Brazil1-50 employees
Vendoo is a software that was created to solve the daily pain points of the millions of sellers in the steadily growing reselling industry. Our goal is to save sellers time and help them make more money. The user friendly interface allows sellers to crosspost their items onto multiple marketplaces in a fraction of the time that it takes to do so manually. Users can currently list items onto 10 marketplaces, including eBay, Poshmark, Etsy, Mercari, Facebook Marketplace and more. The software also provides other conveniences for sellers, like the ability to easily import their existing listings, delisting and relisting items with one click, and inventory management features like easy sorting and searching. Vendoo also provides sellers with business data and analytics to help them make calculated decisions to grow their business.
Washington, DC, USA; Remote51-200 employees
Vendora is building a generational company in one of the largest industries out there - grocery. We build software to serve the $1 trillion dollar (over 3% of US GDP) grocery industry. This ranges from point of sale, payments, e-commerce, inventory management, loyalty, and advanced analytics with more on the horizon. We’re taking bleeding edge technology and an AI-focused approach to modernizing an industry stuck in legacy software and practices. Backed by Y Combinator and investors with deep expertise in retail, we are a team of operators from Amazon, Uber, Tesla, Figma and McKinsey in transforming a sector that touches us all.
New York, NY, USA1-50 employees
Vendra makes sourcing custom parts from US manufacturers effortless. Submit one RFQ and we automate the entire sourcing process - matching you with the right suppliers, handling outreach, and collecting competitive quotes. Full transparency and no middleman markups - just smarter sourcing. Visit www.vendra.io and submit an RFQ today!
San Francisco, CA, USA1-50 employees
Vendy is a marketplace on WhatsApp. We provide customized WhatsApp shops for sellers, allowing buyers to browse inventory, place orders with automated invoicing, and make payments, all within WhatsApp. No app download or sign-up required.
Lagos, LA, Nigeria; LA, Nigeria1-50 employees
Venta AI supports sales teams in Europe with targeted outreach. Our AI employee can access the best companies and contact details and carry out automated outreach in compliance with EU regulations.
1-50 employees
Venue.ink is a booking app for tattoo artists and studios. Receive bookings, manage your calendar, chat with clients and get paid. We help artists spend more time on art, and less time on admin.
Toronto, ON, Canada1-50 employees
We empower healthcare providers, starting with emergency physicians, with instant access to up-to-date evidence-based answers. Our platform cuts through the noise to deliver trustworthy medical information 10x faster, revolutionizing clinical decision-support.
San Francisco, CA, USA1-50 employees
Source Proprietary Deals Through Your Network. Verata combines relationship intelligence with private company data to help PE firms find targets, identify warm paths, and get to companies before they hit the market. We also empower firms to leverage their extended network for back-channeling and due diligence on prospective investment targets.
San Francisco, CA, USA; Remote1-50 employees
Research on autopilot. Discover, Qualify & Engage your market.
San Francisco, CA, USA1-50 employees
Verdex is building the infrastructure to modernize agricultural risk. We fuse high-resolution satellite imagery and weather models to monitor fields 24/7, allowing insurers to settle claims without ever leaving their desks. We are currently helping to insure over 11% of all American farmland.
San Francisco, CA, USA1-50 employees
Veria Labs is developing AI agents that hack better than the best human hackers. Founded by members of the #1 US competitive hacking team, we've already found critical bugs in AI tools, operating systems, fintech and billion dollar crypto exchanges. Now we're scaling that expertise through AI-native security tooling that operates faster than human researchers while finding deeper, more complex vulnerabilities that traditional tools miss.
San Francisco, CA, USA1-50 employees
Veriad is building AI compliance officers for enterprises. Our agent analyze documents, media, and processes against regulations, industry precedents, and internal policies - flagging what's compliant, what's not, and why. Rohan and Anton founded Veriad after building and selling internal compliance tools to Fortune 500 companies.
San Francisco, CA, USA1-50 employees
Veritus is a omni-channel platform for deploying AI agents for loan servicing and collections, including inbound and outbound voice agents. Our agents negotiate repayment plans, follow up across channels, and drive recoveries with zero human involvement. By combining cutting edge voice AI with deep regulatory compliance and vertical specialization we're able to drastically reduce the cost-to-collect while increasing recovery rates.
San Francisco, CA, USA1-50 employees
We build AI models for controlling robot arms, enabling them to learn new skills in just hours. Our robots help businesses cut costs by automating back-of-house tasks with an innovative pay-by-the-hour business model. Our customers include a biotech unicorn, a leading biotech non-profit, and a direct to consumer apparel brand.
San Francisco, CA, USA1-50 employees