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Rider is building modern parcel delivery for online sellers in Pakistan. We are doing $130K in monthly revenue, delivering 200K orders per month across 60 cities. Unlike traditional logistics players, Rider’s solution is: Easier to use (integration with shipper portals, delivery agent app, end- customer app); Quicker (route optimization, next day deliveries, 24-hour cash repayment); Transparent (resolves ‘fake attempt’ deliveries, offers live tracking) and Flexible (shipper and customer control on delivery location and times).
Karachi, Sindh, Pakistan; Sindh, Pakistan51-200 employees
Ridge Biotechnologies uses proprietary machine learning models and cell-free datasets to design precision enzymes and targeted delivery systems for precision medicines. The company targets drug developers, providing a platform that enables differentiation through improved manufacturing and therapeutic indices. They focus on next-generation bioconjugates, protein design, and enzymatic therapeutics.
$25M11-50 employees
Healthcare AIAI ApplicationB2B SaaSSeed$10M-$50M
Rima helps accountants automate document and spreadsheet work with accuracy and provenance. For accountants that deal with messy docs and spend their time in excel, we enable them to describe to our agent in simple language what they do, and our agent does that work for them going forward, preserving their know how.
Austin, TX, USA; Remote1-50 employees
Rimba is building an AI-powered platform to help industrial and energy companies stay compliant with environmental regulations. Legacy systems can’t keep up with today’s complex compliance needs. Rimba offers a platform that integrates data from various software systems—like ERPs, SCADA, Sharepoint—to monitor, report, and verify emissions and other environmental data. Rimba has the capability to parse through PDFs and time-series data at scale while having an AI that continuously learns and predicts outcomes.
San Francisco, CA, USA1-50 employees
Rio is the premier stablecoin liquidity provider for the LATAM market. We enable access to stablecoins for financial innovators to scale their products.
Mexico City, CDMX, Mexico1-50 employees
Risely’s AI agents will form the new operating system for universities, improving retention, staff productivity, and efficiency. Our platform integrates directly into existing university systems (SIS, LMS, CRM), learns each institution’s unique workflows, and deploys specialized AI agents. This dramatically reduces the $735 billion universities spend annually on administrative labor, expands staff capacity without increasing headcount, and improves the student experience. This hasn't been done before because university workflows require nuanced, autonomous judgment, exactly what agentic AI was designed to solve. Our team uniquely combines deep expertise in higher education, enterprise-scale AI, and regulated enterprise sales. Sadia previously built Salesforce’s Education Cloud from scratch, creating the core Student Information System widely used across higher education. She deeply understands university operations and maintains trusted relationships with hundreds of higher-ed CIOs and Provosts. Danial was one of DoorDash’s earliest engineers, where he architected and scaled complex systems from zero to billions of transactions, including their search, recommendation, and Voice AI platforms. He knows how to build robust AI solutions that reliably perform at enterprise scale. Shahryar was a GM at Airwallex, where he built the entire Americas business from 0 to 1 and drove 11x revenue growth. He’s also a master closer, single-handedly securing over $17M in enterprise deals at NerdWallet. He’s a relentless startup executor with deep expertise launching and scaling go-to-market machines in highly regulated industries. We launched six weeks ago and are already at $8k MRR, growing 55% week-over-week -- one of the fastest ramps ever in higher ed. Universities urgently need solutions that expand labor capacity and efficiency, especially as they face unprecedented budget pressure and staffing shortages. With unmatched buyer access, deep technical expertise, and rapid early traction, we are perfectly positioned to own this enormous market.
1-50 employees
RiskAngle delivers fast, accurate summaries of unstructured medical records for insurance companies and law firms. Our AI-powered platform enables users to streamline underwriting, expedite claims processing, and prepare cases with confidence.
San Francisco, CA, USA1-50 employees
RiskCube (YC F24) is an AI-native insurance brokerage built for YC founders and venture-backed startups. We simplify the complex U.S. insurance landscape—D&O, Cyber, E&O, General Liability, and more—with digital transparency and plain-English policy breakdowns. Need insurance for enterprise contracts? We provide multiple quotes from top-rated (AM Best A-rated) carriers, so you can meet vendor requirements and get certificates of insurance fast. Whether you're a Delaware C Corp getting your first policy, scaling a global team, or closing enterprise deals, we give you side-by-side comparisons, fair pricing benchmarks, and the right coverage—without overpaying or guesswork.
San Francisco, CA, USA1-50 employees
Want to apply AI to your IT Helpdesk queue? Risotto helps you grant software access, limit access/permission grants by time, serve knowledge, and get approvals from people like managers. All using natural language directly in chat (AKA "ChatOps") IT teams spend too much time manually provisioning software and answering the same question repeatedly. We help them improve resolution times, reduce SaaS spend, and enhance security with 24/7 automated software access and IT support. Check us out at: https://www.tryrisotto.com
San Francisco, CA, USA; Remote1-50 employees
Ritivel is an AI-native workspace for regulatory and medical writing teams at life sciences companies. Our AI agents draft CTDs, CSRs, INDs, and BLAs in minutes instead of weeks, helping drugs reach patients faster. Every month a drug is delayed from reaching the market costs pharma companies ~$45M in lost revenue and more importantly, delays treatment for thousands of patients who need it. Yet regulatory teams are stuck in a painful, months-long process: synthesizing thousands of pages of clinical data, hunting through SharePoint folders for the right documents, chasing colleagues for missing inputs, and manually drafting submissions. Ritivel deploys AI agents that transform how regulatory teams work. Our agents generate comprehensive first drafts directly in Microsoft Word, following FDA formatting requirements and pulling from your existing clinical data and prior submissions. Every data point includes citations linked back to the original source, so reviewers can verify with one click. Connected to SharePoint and Veeva, our agents automatically source the right documents. Integrated with Outlook, they handle reminder emails and follow-ups automatically. We're engineers who previously built AI copilots at Microsoft Research. After 50+ conversations with pharma professionals, we discovered the critical bottleneck in regulatory submissions and built Ritivel to solve it.
San Francisco, CA, USA1-50 employees
Riverbank is an ex-NSA and DoD team creating the first AI native offensive red team, starting with the $3B pentesting market. We blend AI agents with experienced human operators to find what traditional vulnerability scanners miss and break through organizational cyber defenses with swarms of AI agents.
San Francisco, CA, USA1-50 employees
Easily build & scale AI agents, functions, stateful services, and more. Open-source & self-hostable.
San Francisco, CA, USA1-50 employees
Rivet is a visual AI editor for product designers to make UI changes. Designers ship the changes they make directly to their codebase. The most painful problem for designers today is that their vision doesn't match code. Rivet replaces slow collaboration between designers and engineers by letting designers just do it themselves. Rivet's editor helps turn product designers into design engineers. Design-led companies in YC are Rivet customers. Learn more at rivet.design
San Francisco, CA, USA
Riveter is Lovable for web scraping. With a single API, agents can search, scrape, and structure data from the web. Customers like Snapchat and OpenAI use us them enrich datasets using Riveter's AI search agents that combine data from the web with third party or internal data. Their AI agents, custom scrapers, and integrations pack the power of browser use and automation for search, at a cost that allows for scale. You can even create a custom data API for repeated searches live in your app or internal databases. Perplexity and ChatGPT are great for single questions, but they can’t handle large amounts of data at once. And they’re working with a single agent and context window instead of one in every cell. And Riveter’s web browsing can go further—even reading PDFs and images that may contain answers. Most teams still spend hours (or hire UpWorkers/contractors) to manually copy product specs, check competitor pricing, pull custom KYB/KYC data to assess customer risk, or scrape filings. Or they spend months building web scrapers, and when that still doesn't work, they come to Riveter. Our founding team brings deep product and engineering expertise from to YC-backed companies Gusto, Retool, and Middesk.
San Francisco, CA, USA1-50 employees
Riviera builds AI Employees for Hotels. Our first agent is a hotel phone receptionist that lets hotels spend less time answering phone calls and more time helping customers. Our system handles front-desk inquiries, in-room dining orders, and reservations. It answers every question instantly and in any language, 24/7. We are solving a problem that older phone systems and IVRs can't: customers hate not being able to talk to someone immediately, but most travel businesses can’t dedicate additional staff to manage phone lines. Voice AI has always seemed out of reach because the technology infrastructure in the travel industry is often fragmented, with reservation systems, loyalty programs, and in-house operations software that weren’t designed with voice AI in mind. Riviera addresses this by integrating seamlessly with existing software providers and using human-sounding voice models that are highly trained on data specific to each business type and department. Hotels spend hundreds of billions annually on staffing and risk losing potential revenue when phone lines are overwhelmed or callers hang up. By enabling them to handle unlimited calls, day or night, Riviera unlocks additional revenue and eases labor challenges.
San Francisco, CA, USA1-50 employees
Roame is flight search engine design for credit card points and miles. We help travelers redeem their points for dream vacations in seconds rather than days. At Roame, we are on a mission to revolutionize travel and consumer finance. We stand at the intersection of travel tech and fintech.
San Francisco, CA, USA1-50 employees
Roark helps teams test, monitor, and improve their voice agents. Voice AI is exploding, but reliability is still the #1 challenge. Teams spend hours manually testing agents and still miss failures. In the last 6 months, Roark has processed over 10M minutes of calls, powering monitoring and simulation for teams across the Voice AI ecosystem (including YC companies). We close that gap by combining: 📊 Monitoring & Evaluation - 40+ built-in metrics (latency, instruction-follow, sentiment, etc.), custom dashboards, alerts, and the ability to define your own. Up to 15 speakers with automatic speaker identification. 🎭 Simulations & Personas - end-to-end phone/WebSocket simulations for inbound and outbound agents, with configurable personas (accents, languages, speech & behavior profiles). Define tests as conversations with a graph-based approach, so you can easily branch into edge cases and variants. 🔁 Full lifecycle loop - failed calls automatically become repeatable tests, so every failure makes your agent stronger. Roark is the missing QA layer for Voice AI - helping teams ship agents they can trust.
San Francisco, CA, USA1-50 employees
Robby is an AI growth engine for home services businesses that uncovers revenue opportunities and collects additional data from every technician visit. Our AI combines customer and third party data to generate dozens of new leads every day, and then arms the technicians with talking points to increase close rates, giving GMs a single command center to manage and drive revenue. We have several paying customers that are each uncovering 6 figures in additional revenue opportunities every week. On our first day of launch, we helped close $40k in new business within an hour. Our team has spent the last few months riding along with dozens of technicians and shadowing every position in the office to best understand the industry. We're also studying for the EPA 608 exam to become certified technicians ourselves. Vineet and Feroze have both built critical products and infra at prominent startups (Ironclad, Porter, Affinity, Uber, Cloud Health Systems). Joe previously consulted PE firms on software acquisitions and led home services growth projects at Bain. We all met at Harvard Business School, and dropped out to work on Robby full-time.
San Francisco, CA, USA1-50 employees
RoboDock builds robots that automate depot operations, like charging and vehicle checks, for electric and autonomous vehicle fleets. We turn fleet depots from manual sites into self-running systems that lower operational costs and increase vehicle uptime.
San Francisco, CA, USA1-50 employees
Rocketable is building a large portfolio of wildly profitable software businesses by acquiring existing products and replacing human teams with AI agents. Today’s foundation models already possess enough intelligence to automate most of the tasks required to run a profitable software business. In the functions where agents aren’t yet intelligent enough to replace humans, they will be soon. When every human function required to operate a software product has an AI agent equivalent, the next step will be within reach: operating an entire company with a team of AI agents instead of humans. But superintelligent agents within each function won’t be enough. To operate a software company with 0 human employees, the agents will need to be directed towards common goals, integrated to collaborate across functions, tuned with feedback loops connected to product metrics, and trained to make resource allocation decisions. We are creating the tools needed to replace the entire org chart of a software company with a team of AI agents. We are developing these tools by owning the products that we automate, because we know from 10+ years of experience building automated systems with AI/ML that integration is the key to unlocking superhuman performance.
Remote1-50 employees
💼 Augment builds AI-powered tools to automate company operations, starting with Roger—an intelligent CRM that acts as your AI-powered sales team. 💼 🚀 Built by experienced founders and backed by Y Combinator, Augment is redefining sales automation with AI-driven workflows that handle prospecting, outreach, and deal management—so businesses can scale effortlessly. How it Works – Roger, Your AI-Powered CRM 📊 A CRM That Works for You Unlike traditional CRMs that require constant manual updates, Roger actively manages your sales pipeline. It tracks interactions, follows up with leads, and keeps your team focused on closing deals instead of admin work. 🤖 AI-Powered Outreach & Engagement Roger automates lead generation and crafts personalized outreach messages across email, LinkedIn, and other channels. It continuously refines its approach based on engagement data to increase conversions. 🎯 Smart Deal Management Roger qualifies leads, schedules follow-ups, and moves deals through your pipeline automatically. It ensures your team never drops the ball on a potential customer. 📈 Seamless Integration & Insights Roger syncs with your existing tools, updating your sales data in real-time. AI-powered analytics provide actionable insights, helping teams optimize sales strategies. By automating tedious sales tasks and making CRM proactive instead of passive, Roger turns AI into your most efficient sales teammate—helping businesses close more deals, faster.
1-50 employees
Rome is building a freight marketplace for truck drivers to find work, receive payments, and manage their business. Today, Rome helps 80+ drivers earn up to 40% more by accessing 10x more loads through scraping brokers/shippers. We’re looking to become the platform for all truck drivers and eventually own the layer between drivers and shippers.
San Francisco, CA, USA1-50 employees
Rosebud AI is a no-code platform that lets creators build 3D/2D games and immersive worlds by describing them in natural language, generating code, visuals, and gameplay logic. It targets indie developers and marketers, monetizes via a SaaS platform with templates and World Labs integration, enabling browser-based games and web apps without coding.
Creative / MediaAI ApplicationAPI / PlatformSeries A$1M-$10M
Rosebud Biosciences accelerates drug development by screening drugs against organoids (micro-organs) that have the same gene mutations as the patients. We partner with therapeutics companies to screen their drugs, and we perform our own drug discovery for rare diseases that have no existing treatments. Our organoids are also fetal-like and enable discovery of novel drug targets for pediatric diseases. This technology was validated at Stanford, published in a prestigious journal, and has already led to the discovery of a drug target in a pediatric heart disease that could not have been found using traditional disease models.
San Francisco, CA, USA; San Carlos, CA, USA1-50 employees
Roundabout Technologies makes AI-powered traffic lights, allowing cities to reduce pedestrian deaths, improve traffic, and reduce resident complaints. Our founding team has experience building safety-critical embedded systems and AI at Waymo, Zoox, Google, and Verily.
1-50 employees
Roundtable Proof of Human is an API that invisibly detects bots and verifies human identity. Founded by 2 Princeton cognitive scientists, Roundtable leverages world-class research with enterprise-grade accuracy and latency so websites can verify their human users friction-free.
San Francisco, CA, USA1-50 employees
Rove is building the first accessible and universal airline mile, redeemable across dozens of international airlines and hotel chains worldwide.
New York, NY, USA1-50 employees
We deliver high-quality, cost-effective healthcare to employees through text. Employers cut 10–20% of healthcare spend. Employees get concierge care that improves outcomes. Our AI agents analyze clinical data to identify care needs. We treat common conditions through our integrated virtual clinic. For more complex care, our agents find the best in-network providers using millions of price and quality data points, and handle end-to-end appointment booking.
New York, NY, USA1-50 employees
Rovr streamlines engineering operations by automating intake, triage, routing, and cross-team coordination. It replaces internal forms, manual Slack triage, and scattered docs with an AI front desk that understands requests, assigns owners, updates context, and posts status changes directly into Slack. Rovr’s built-in ops CRM gives teams a single system of record for eng requests — from tooling access to platform incidents to dev-infra workflows — reducing operational drag across the entire org.
San Francisco, CA, USA1-50 employees
A Cursor-like AI-assisted, no-code IDE for building production-ready multi-agents. ✨ Start from a simple prompt to create fully functional agents with the Copilot 🧪 Test them in AI-simulated scenarios 🌐 Connect MCP servers and tools 📞 Interact through the Python SDK, a web widget, or a Twilio phone number ♻️ Continuously refine your agents by providing feedback to the Copilot Built on OpenAI's Agents SDK, Rowboat is the fastest way to build multi-agents!
San Francisco, CA, USA; Remote1-50 employees
RowFlow replaces clunky web forms with natural conversations that run over text, slack, or wherever your users are. Our platform increases your form’s response rates while cutting your internal overhead in half. With RowFlow, you can take any existing form and instantly convert it into an AI-powered conversation. New flows launch in minutes and reach respondents over your preferred channel or embedded chat. We guide the exchange, follow up automatically, and return clean structured data without extra work from your team. Forms power billions of business interactions yearly. Whether it’s forms for client intake, registrations, compliance, feedback, or surveys, they all follow the same painful pattern: low conversion, messy data, and frustrated users. Teams have long tolerated forms only because there's been no scalable alternative for collecting structured information from people - until now. Our goal is for RowFlow to become the new default way for how organizations collect user data in an AI-first world.
New York, NY, USA1-50 employees
Rownd helps enterprises in regulated industries build and deploy AI applications with our open-core model, providing production-ready components for RAG systems, model fine-tuning, and prompt engineering that run entirely on-premise while maintaining complete data sovereignty. With a powerful CLI and YAML configs, teams can create differentiated AI products without vendor lock-in or ML expertise, ensuring compliance and cost control that cloud-only solutions can't match.
Raleigh, NC, USA1-50 employees
We built Rubber Ducky Labs to help e-commerce teams effortlessly improve product discovery through better metadata. Our tool enables non-technical users to leverage multi-modal AI on product catalogs—just upload a CSV and start tagging metadata in minutes.
San Francisco, CA, USA; Remote1-50 employees
Rubbrband creates world-class video ads and stories with AI and human creativity. We work with companies from seed to growth, see our work at rubbrband.com.
1-50 employees
Ruby is a neobank that offers e-commerce businesses a flexible spend management solution and direct integrations with commerce platforms. By combining banking and commerce data, Ruby provides businesses with a real-time, unified view of their financial health and money movement, empowering them to make better financial decisions and scale their operations.
New York, NY, USA; Remote1-50 employees
Rulebase builds AI coworkers that help banks and fintechs review 100% of customer interactions in real time. Our agents flag compliance breaches, high-risk issues, and quality gaps across calls, chats, and emails — then route them to the right teammates. The result: up to 30% fewer escalations and QA cycles reduced from hours to minutes.
1-50 employees
Ruma Care automates prior authorizations - we’re starting with clinics that administer the most expensive specialty medications. Biologics are expensive medications that cost $80-$150K+ per year per patient, and often need to be administered in specific settings called infusion clinics. Medical providers buy these drugs up front to secure pricing deals and safer inventory - they are reimbursed for the cost of the medications through the patients’ insurance. Because they’re so expensive, these specialty medications are denied by insurers at a rate of 37% each year. When they are denied, providers don’t get reimbursed for the medication and are left covering the costs. Ruma Care solves this so clinics get paid, patients get treated faster, and care teams spend less time fighting insurance. We do this in three ways: 1. For each medication, diagnosis, and insurance combination, Ruma extracts the submission criteria required to get the drug approved by insurers. 2. We pull out the correct forms, then automate the form-filling for prior authorizations. 3. Lastly, we enroll patients in copay assistance programs, all in one workflow and platform. We turn a process that traditionally spans 70+ online portals, disparate paper forms, and manual phone calling into a single, streamlined platform. As we process prior authorizations, our models learn from denial patterns to understand exactly what insurers need to see to get a prior authorization approved.
San Francisco, CA, USA1-50 employees
Run:AI is an AI infrastructure platform that orchestrates GPU resources and AI workloads across on‑premises, cloud, and hybrid environments. It enables dynamic scheduling, resource pooling, and centralized management to maximize GPU utilization and accelerate AI development. The platform targets data scientists, ML engineers, and IT ops teams; it differentiates with API‑first architecture and Kubernetes integration.
AI / MLAI InfrastructureInfrastructureAcquired$50M-$200M
Edge AI is inevitable, but shipping it is painful: every device class behaves differently, runtimes vary, models are huge, and performance collapses under memory/power constraints. RunAnywhere turns that into an enterprise-ready workflow: one SDK to run models on-device, plus a control plane to manage models, enforce policies, and measure outcomes across thousands of devices.
1-50 employees
RunLocal helps engineering teams ship better on-device AI in their application, faster, with more confidence and less hassle.
London, England, United Kingdom1-50 employees
RunRL improves LLMs and AI agents with reinforcement learning. Do you have a model that needs to get better at a certain task? Are you tired of messing around with prompts? Do you spend a lot of money on observability, and wish that all this data could let your model self-improve? Well, head on over to RunRL.com, and see what we have to offer! If you give us a model, a prompt, and a reward, we’ll make your model’s reward go up.
San Francisco, CA, USA1-50 employees
Ruvo is a global account for receiving, holding, and moving money between USD and BRL. We connect Pix, crypto, and Visa so you can receive USD from abroad, convert between USD and BRL in minutes, send money to the U.S., spend worldwide, and save in digital dollars with yield — all in one place. Ruvo supports both personal (CPF) and business (CNPJ) accounts, with low fees, strong security, and direct Pix settlement. Formerly known as Cacao.
São Paulo, SP, Brazil1-50 employees
Ryse is the only marketplace where investors who want to buy leases can trade with real estate operators who want to sell leases.
New York, NY, USA1-50 employees
Ryvn provides the devtools and infrastructure to easily deploy any workload, on any cloud, and on-prem. Run apps in your own cloud and offer Bring Your Own Cloud (BYOC) to your customers in minutes, with built-in observability designed for sensitive industries.
New York, NY, USA1-50 employees
Salt is a neo banking solution stitched together to ease payments and documentation which comes with business banking by moving it to a digital-first and automated end to end platform.
Bengaluru, KA, India1-50 employees
At SAMMY, we do knowledge. Not “find me every time [thing] was mentioned,” but real knowledge. A compliance or legal update comes in — where does it apply, how does it affect our processes, and what should we do next?A process changes — which related processes need updating? Update them for me. We’re trusted by some of the largest companies in the world to power their knowledge, because without knowledge, AI is just a bull**** exacerbator.
1-50 employees
AI researchers should be pushing the boundaries of what's possible with new architectures and training methods. Instead, they waste weeks configuring cloud infrastructure, debugging distributed systems, and optimizing their GPU code. We know because we lived it: While training our own models across thousands of GPUs earlier this year, we spent more time fighting our infrastructure than doing actual research. That why we're building two things. First, Elastic Cloud: a managed platform that automatically finds the cheapest GPUs across all providers, handles spot instance preemption, and cuts compute costs by up to 80%. Second, automatic kernel optimization that makes training code run faster by modeling hardware topology, often beating hand-tuned implementations. The problem is that getting high performance across different hardware is genuinely hard. NVIDIA's CUDA moat exists because writing fast kernels requires deep expertise. Most teams either accept vendor lock-in or hire expensive kernel engineers. Our goal is to break the CUDA moat. The compute bottleneck is the biggest constraint on AI progress. NVIDIA can't manufacture enough GPUs, and their monopoly keeps prices astronomical. Meanwhile, AMD, Google, and Amazon are shipping capable alternative hardware that nobody uses because the software is too hard. We're breaking that moat. If we succeed, anyone will be able to train state-of-the-art models without thinking past their PyTorch code.
1-50 employees
SID is an AI research lab based in San Francisco. We train models that can retrieve and reason over any data source.
San Francisco, CA, USA1-50 employees
Snab aims to automate & centralize access and management of global banking for complex business groups with multiple subsidiaries, and digitize their access to financial services.
Madrid, Community of Madrid, Spain; Remote1-50 employees
Soteri Skin is D2C skincare for chronic skin conditions like eczema. We’re the only non-prescription product proven to provide long-lasting relief for the 30 million Americans who suffer from eczema. How it works: Skin surface pH is constantly in flux, and many of your daily activities can throw it out of balance. People with chronic skin conditions such as eczema have a harder time regulating their skin's pH. Soteri's patented pH/LOCK™ locks skin in at a therapeutic pH for 12+ hours, which is shown to help break the cycle of skin sensitivity, whether you have eczema, psoriasis, or just a bad sunburn. Our formulations are aesthetically elegant (non-sticky, sit well under makeup, etc), safe for anyone to use, and don't require a prescription. Most people see skin health improvements within the first few weeks of application, even for tricky, chronic skin conditions like eczema and psoriasis. With Soteri Skin, anyone can enjoy healthy, glowing, pH-enomenal skin!
San Francisco, CA, USA1-50 employees