SaaS Startups funded by Y Combinator (YC) in the San Francisco Bay Area that are currently hiring 2026

Deel is the all-in-one payroll and HR platform for global teams. Built for the way the world works today, Deel combines HRIS, payroll, compliance, benefits, performance, and equipment management into one seamless platform. With AI-powered tools and a fully owned payroll infrastructure, Deel supports every worker type in 120+ countries—helping businesses scale smarter, faster, and more compliantly. Discover how Deel makes global work simple at deel.com.

Webflow is the leading no-code visual web development platform. It seamlessly generates sophisticated code so anyone can build powerful web-based businesses and adapt to changes without developers or months of building. From entrepreneurs and creative agencies to Fortune 500 companies, Webflow makes the internet a more inclusive place by making the tools to build on it more accessible to more people, fueling business growth. Webflow powers websites for innovators like Discord, Monday.com, IDEO, Orange Theory Fitness, TED, and Dropbox. Webflow is backed by Y Combinator, Accel, CapitalG, Silversmith, and other awesome investors.

Launched out of Y Combinator’s 2009 Summer batch, Stripe is a global technology company that builds economic infrastructure for the internet. Businesses of every size—from new startups to public companies—use our software to accept payments and manage their businesses online Stripe is a proud partner of YC companies—from Airbnb (S09) to Defog (W23)—to help them grow their businesses and increase the GDP of the internet.

Deep Interactions is a humans-in-the-loop AI builder. We don't leave you with a spaghetti mess of a code. We bring product intelligence and power the context layer that enables your team to build in sync - saving companies tokens, time, and nerves. You give us a problem and we ship a working AI product in the same afternoon.

Strawberry farming is a $3B industry in California alone with 60% labor cost using 40-year old software. Synphony provides strawberry picking robots and software services including: bed-level analytics, data pipeline integration, and agentic solutions. Synphony's "side hustle" is selling data, evals, and viral demos to robot foundation labs while building capacity for general robot deployments. We've started with strawberry farming for great margins and outdoor data moat, but also received requests for robots in semi-conductors and autonomous space labs. Synphony's team has won over 15 hackathons together (taking home 4 Jensen-signed GPUs!). Sean did ML research at NVIDIA and led AI products used by IRS and Citibank. Lucas' research spanned robotics, IoT devices, and neuromorphic computing. Alex architected an app with 400k users.

Replicas is a background coding agent that allows you to delegate tasks to Claude Code or Codex from Slack, Linear, GitHub, and more. Each task works inside of a sandboxed virtual machine, allowing teams to heavily parallelize work and burn through tickets. Replicas agents output higher quality PRs via feedback loops - each task automatically is notified and fixes CI failures and reads all code reviews. With Environments, engineering teams can configure agents to run their entire codebase locally, verify its work, and provide preview URLs.

10x Science develops frontier AI models with deep memory to redefine how scientists understand and engineer biology across the life sciences, starting with drug development. AI-powered drug discovery is flooding the pipeline with new candidates faster than ever. But before any of them can advance to the clinic, scientists must deeply characterize the protein therapeutic to understand whether it will work. Today, that process takes months of manual, error-prone analysis that cannot keep pace with discovery. Our AI-native platform automates it, giving drug developers the confidence to advance the right candidates and stop the wrong ones early. We have strong commercial traction with enterprise pharma customers. Our founding team built the field of next-generation protein characterization out of Carolyn Bertozzi's Nobel laureate lab at Stanford. Collectively, we have 18+ years of collective domain expertise, 47+ scientific publications, and a 2x YC Founder. We move at the highest velocity and are positioned to lead the next generation of modern AI development in the life sciences.

Hyperspell is the Memory & Context Layer for AI Agents. AI agents are clueless geniuses. They crush humans on any standardized test, but wouldn't last a day at a real job. What today's super-intelligent agents are missing is the real world context they are operating in. A context that humans stitch together from hundreds of data points across dozens of interactions and channels. A context that grows with their tasks. Hyperspell gives AI agents this context by connecting to their user’s workspace data and building a personalized memory and context layer.

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.

Semble builds custom AI agents trained on how your business actually runs and plugged into the tools your team already lives in. Jonathan and Ethan met studying computer science at Stanford. Jonathan worked at Convergint, one of the world's largest building system integrators, specifically for the purpose of learning how this industry works. They are determined to make Semble the industry standard for construction's back-office.

Floot lets non-coders & entrepreneurs build real web apps that actually work. We’re taking a new approach by building everything from the ground up for AI. ✨ Try building an app at floot.com Existing AI app builders fall short of enabling non-coders to build real, serious apps. They often: - Break down when building anything more than a prototype or toy app - Have non-coders stuck with errors they don’t understand - Require non-coders to handle multiple services designed for developers (e.g. for backend, database, hosting, etc) The fundamental problem: these AI app builders just cobble together existing developer tools and slap AI on top, but these tools were designed for humans and not for AI. The result? Non-coders get excited, start building, hit a wall, and then abandon their projects. Floot is purpose-built for AI. Our secret sauce: 1) Instead of reusing a coding framework designed for humans, we created a specialized framework that dictates how AI should write code and how the code runs on our infrastructure. This allows us to enforce best practices, detect errors earlier, and give the best feedback to the AI. As a result, Floot can write better code and fix issues more effectively. 2) Floot has the entire tech stack built-in (backend, database, hosting, etc) so building and managing an app feels seamless, especially for non-coders. And because we control every layer of the stack, we can optimize each layer for AI-first coding. Because of this, non-coders can get more done with less time and prompting. They can finally build serious apps that work, instead of getting stuck in frustrating error loops and then abandoning their projects. We also built a highly scalable hosting system directly on AWS so Floot apps can handle real traffic and business demands. This means non-coders can build, deploy, and scale their apps on a single platform seamlessly. Plus, Floot is really fun to use! Try building an app at floot.com

Certus AI is replacing the restaurant phone line with Voice AI. Restaurants lose up to $100,000 per year per location from missed calls, lost orders, and abandoned hold lines. Staff are overwhelmed. IVRs frustrate customers. Call centers are expensive and impersonal. It’s 2025. Guests don’t leave voicemails or wait on hold. They just move on. Certus is an AI voice agent built for restaurants. It answers every call, 24/7 — taking orders, processing deliveries, booking reservations, upselling, and handling complaints in English, Spanish, French and more. Certus is built to manage the phone line end to end, from the customer call to the restaurant tech stack, with zero human intervention required. It currently integrates with industry-leading systems like Toast, Square, Clover, UberEats, DoorDash, and more. We’re building the voice layer of the modern restaurant — the employee they’ll never fire. We started Certus because we lived the pain. Gurveer (CEO) grew up answering phones in his family’s restaurant and helped operate them, growing from 1 to 11 locations in 7 years. Later, he and Adam (CRO) ran a restaurant growth startup to help others increase revenue, but kept watching clients bleed cash because no one picked up the phone. So we built the solution the industry always wished existed. Until now, this problem was considered unsolvable. But Voice AI has finally crossed the conversational chasm and 72% of consumers now prefer AI over humans as long as it means faster and better service. More importantly, the market is begging for this. The North American restaurant industry crossed $1 trillion in 2024, and it's projected to hit $1.5 trillion in 2025. Yet over $100 billion is still lost annually to missed calls, human error, and outdated tech. As the market continues to grow, so do the losses! Our customers say it best: - “Certus changed my life overnight.” - “We were losing the ability to give great in-house service — the phone was killing us.” - “70% of my business comes through the phone. That’s mine and my 16 staffs livelihood.” - “Before Certus, I used to lose 40 - 60 calls a day…. now my printer just stays printing!” - “I’ve been in the business 38 years. I’ve been waiting for this since then.” Certus is here to fix the $120B phone problem — one call at a time. And in doing so, we’re redefining how the restaurant industry communicates forever, starting with the phone line.

Manage a fleet of agents locally or in the cloud. 100% open source and free to use. Built to help you do your life's work.

Next-generation truck management software to automate back-office operations for trucking companies. Features include AI agents to automate inbound/outbound calls, AI document upload to reduce manual data entry, load sourcing tools, automated accounting, and more.

Cascade Space is building a turn-key communications system for lunar and deep space missions. Our ground station network and integrated software tools work together to maximize uptime and availability, while reducing spacecraft iteration cycles from weeks to hours.

GroundControl builds mission-critical software for manufacturers in highly-regulated industries (aerospace, defense, medical) Our core product automates lengthy, complex, and regulated quality documentation in aerospace manufacturing. As an example, the Boeing 777 is made up of over 3 million parts sourced from manufacturers around the world. These manufacturers must complete quality documentation for every part on this aircraft (machined parts, printed circuit boards, wire harnesses, assemblies, and more). GroundControl helps manufacturers complete this required documentation accurately, in minutes instead of days.

SalesPatriot is a back-office operating system for distributors and OEMS. We build custom AI workflows for sales and supply chain teams to manage procurement, requests for quote and purchase orders. In large orgs that operate as key nodes of the supply chain data is scattered across twelve systems. Quotes get lost and Executives lack visibility. Supply chain workflows are time consuming because data isn't where it needs to be in the format it needs to be. Employees are stuck between their email, ERP, CRM, marketplaces, and spreadsheets instead of winning business and protecting margin.

Contrario is an AI recruiting and hiring platform on a mission to help companies build generational teams. In the age of AI, the best teams are still built by the best people. Recruiting has become a zero-sum game where speed and quality decide who wins. Contrario is a network of expert recruiters supercharged by vertical AI agents purpose-built for hiring. Teams at Wispr Flow, Listen Labs, Slash, and 200+ of the fastest-growing companies use Contrario to power their hiring. In under six months, Contrario has crossed $6M in annualized revenue, paid out $1M+ to recruiters, and placed 150+ candidates — making it one of the fastest-growing AI recruiting platforms on the market. Backed by Y Combinator, Nexus Venture Partners, Goodwater Capital, and Inventum Ventures, alongside angels including David Chen (ex-HRT), Abhijeet Dwivedi (OpenAI), Hank Couture (DoorDash), and Jerry Cain (Stanford CS). Built by Stanford dropouts. Headquartered in San Francisco.

Calltree makes enterprise-grade AI support reps for call centers. Our AI reps take voice calls and chats like other AI support agents but can also use internal enterprise tools like a homegrown CRM or internal dashboards, like the highly trained humans working there today.

WOZCODE is the highest performing, lowest cost AI coding agent. Available via Claude Code Plugin. The WOZCODE plugin outperforms Claude Code alone on all key metrics: Cost: 25-55% cheaper Speed: 5-10x faster on database tasks, 30-40% faster on most others Performance: beats Claude code on Terminal Bench 2.0 (68% vs 58%) Install with one command. Access directly via Claude Code Your tools, your workflows, but Better, Faster, Cheaper.

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.

Edexia is an AI Teacher Assistant for grading essays. It can be trained and controlled by the teacher and can grade assignments from any curriculum, year level, subject, or format. Learning like a teacher, Edexia visually breaks down its understanding of the rubric, and updates this as a teacher corrects it. Our vision is to transform education by facilitating AI’s safe and effective integration across all institutions and applications. Not using AI to replace teachers but rather to empower them—providing them with all the time and resources they need to develop their students.

Cekura helps Conversational AI companies with automated QA. From pre-production simulation and evaluations to production call monitoring, to assisting customers in setting up the CI/CD pipeline, we help in QA across the agent lifecycle. We are working with 75+ customers across healthcare, BFSI, logistics, recruitment, and retail. Some of the largest CCAS players and enterprises use Cekura to ship AI voice and chat agents reliably

OpenFunnel is the Search Engine for GTM. Searching for "B2B SaaS, 501-1000 employees, uses Salesforce" - is just targeted spam. Even if you get creative with LLMs to query these databases, everyone has access to the same commoditized databases, these databases lack insights about right timing or pain-points prospects face. OpenFunnel is a time-aware search engine for insights and activities in your target segment - that reveal pain. You can search for activities like: "Find companies looking to implement usage based billing" "Find companies that moved from OpenAI to self-hosted models in the last 3-6 months" "Find companies who updated their pricing page to introduce an enterprise plan in the last 3 months" OpenFunnel continuously monitors these time-based signals, delivering actionable insights daily - so you have the fastest, unique insights that your competitors miss out on. Over 1000+ users are already discovering prospects through pain-first search, including some of the fastest-growing companies like Central, Mintlify, and Everest Systems.

Coval is a simulation & evaluation platform for autonomous AI agents, helping engineers launch dependable assistants across chat, voice, and other modalities. We simulate thousands of scenarios engineers don't have to manually test their agents. Our CI/CD evaluations automatically simulate and detect regressions.

Lighthouz is a backoffice AI solution for freight brokers, to automate AP, AR, and Collections. Leading freight brokers are using Lighthouz AI to automate FTL (full truckload) and LTL (less than truckload) freight bill auditing, automatically filing disputes, and invoicing customers. With Lighthouz, 70%-85% emails do not need to be touched by humans. Hence, brokers using Lighthouz are invoicing customers 36% faster, getting paid 5 days sooner, and reducing back office costs by 40%. Lighthouz brings 25+ years of supply chain, logistics, and AI experience to brokers, with a AI Professor from Georgia Tech who taught 1000+ students, and team with PhD and MS in AI, Machine Learning, and Data Science.

Planbase has everything health clinics need to manage their team in one place: capacity planning, employee scheduling, credentialing and payroll.

Firstwork is a next-generation HR platform designed specifically for companies with dynamic workforce needs. Our mission is to streamline and automate key HR processes to help businesses operate more efficiently and effectively. What We Do (for now): (1) Smart Onboarding 📋: Our platform simplifies the onboarding process by automating the collection and verification of credentials, such as right-to-work documents, insurance forms and driver’s licenses. This reduces administrative burden and accelerates the time-to-productivity for new hires. (2) AI-Assisted Activation 🤖: Leveraging AI, we enhance communication and messaging for new hires, ensuring they receive timely and relevant information. This helps in better engagement and faster integration into their roles. (3) Perpetual Compliance ✅: Our system uses AI and OCR technology to continuously monitor and ensure compliance with various regulatory requirements. This includes tracking expirations of critical documents, updating records, and generating compliance reports, thus reducing the risk of penalties and legal issues.

Poka Labs builds an AI platform to help sales reps at chemical manufacturers respond to requests from customers and win more business. Our agents understand each companies product catalog, customer purchase behaviors, and tribal knowledge in order to price, quote, and win the business. Malay and Andrew met while pursuing at Harvard Business School and now are building for companies ranging from a few million in sales per year to billions.

At Anglera, we're developing a suite of AI agents to help e-commerce companies run their operations more efficiently. Our flagship agent helps our customers onboard, enrich, and manage their product data, reducing time per product from 15 mins down to 5 seconds. We previously developed ML to automatically enrich millions of products at Uber Eats, and we're now on a mission to automate the most common manual workflows for every e-commerce business.

Gauge helps your company show up in more AI answers. There’s a wealth of data distributed across GA4, GSC, keywords, prompts, ads, and more. This data is incredibly rich, but fragmented and complicated to understand. Gauge unifies all of these data sources into a single agent that can do the work of an entire marketing team.

Respan (formerly Keywords AI) gives teams a unified control plane to trace and evaluate agent behavior without guesswork, automatically surface issues, and fix what breaks faster. Respan connects production observability, automated and human-in-the-loop evaluations, and an adaptive AI gateway to close the loop between detection, decision, and action - so agents improve continuously in production. Respan is trusted by 100+ AI startups and enterprise teams. Today, the platform process 1B+ logs and 2T+ tokens every month, supporting more than 6.5M end users.

Meticulate is an AI-native sales platform. We make it easy for sales teams to send stellar outbound messaging at scale. Instead of using boilerplate campaigns, Meticulate codifies your rules and strategies (e.g. “CFOs want to hear an ROI calc upfront”) and combines them with deep research to send custom sequences to every lead. We’re serving leading GTM teams today (incl OpenAI, Noda, ThreeKit), and are backed by leading AI investors: Y Combinator, Link, Cervin Ventures.

Andy is AI software that completes documentation for nurses doing home visits. Our software saves $8B a year; Tiantian was previously a PM at Google’s healthcare business and Max was a staff engineer on the health team at Apple. Andy benefits nurses and the agencies that employ them. Agencies that use Andy see up to 45% more detailed charts, 2x greater nurse productivity, and timely submission (no more billing delays!) With Andy, clinicians get their evenings back. Home health is the fastest growing segment of healthcare, doubling to $251B by 2031. Combined with recent nursing shortages and burnout, we’re seeing not just urgency, but excitement and joy, around adopting AI for home health.

Brainbase Labs is an applied AI research lab enabling AI in the workforce by building high-fidelity agent environments and tooling.

GetCrux is the AI Creative Strategist to launch winning ads. Creatives have become the biggest lever to win on ad platforms. Yet, there is no clear way to figure out why something works. Marketers end up guessing and replicating the best performing ad, only to see it fail - with high CAC & wasted dollars. GetCrux helps performance marketers find winning patterns in their ad creatives across 100+ parameters like hooks, messaging, storyline, music, pacing, and recommend exactly what to launch next.

Alex is an agentic AI recruiter for the future of hiring. Companies use us to get the best hiring signal on their applicant pool and hire in a fraction of the time. Our AI recruiter, Alex, has a live conversation over a video call with each of your candidates based on the interview questions you choose or that are recommended based on the job description. During the interview, Alex asks personalized follow-up questions in real-time based on the candidate's responses. Alex can be customized to your roles in minutes and has already conducted thousands of interviews across engineering, IT, retail, hospitality, and more.

Tamarind Bio is a website and API which allows scientists to use computational biology tools at scale using a simple interface. On Tamarind, scientists can use ML models like AlphaFold to design and simulate molecules by simply selecting inputs instead of or setting up a high performance computing environment or dealing with DevOps. Tamarind is used by tens of thousands researchers in large pharma companies, top biotechs, and academic institutions.

Centralize is the relationship intelligence platform for enterprise revenue. We show reps who they know inside every deal, who they're missing, and the fastest path to the decision-makers who close it. We're building the graph of who trusts who in B2B.

Building a modern alternative to Salesforce: https://github.com/twentyhq/twenty

Campfire is the modern accounting platform for startups and mid-size tech companies. The fastest growing YC companies such as Replit, Posthog, SpeakAI run on Campfire. Our product includes an accounting general ledger that has multi-entity support and advanced financial reporting such as P&L by department and contribution margin by customer. Migrate from legacy accounting software to Campfire for your accounting and financial reporting to automate manual tasks and streamline workflows to unlock financial insights and accelerate the monthly close process.

PropRise is the AI platform for institutional CRE investment teams. We automate the tedious, Excel-heavy workflows that slow down dealmaking: from sourcing to underwriting to due diligence. Our two live products serve 50+ customers including Public Storage: Beacon automates site selection for developers, and Primer extracts financial data from deal packages into structured, model-ready formats, cutting hours of analyst work to minutes. We're expanding across asset classes to become the operating system for CRE dealmaking.

Strada automates insurance operations with AI agents. We deploy agents that handle policy servicing and claims operations end-to-end for some of the largest insurance carriers and brokers in the US. With native integrations into core policy, claims and agency management systems, we automate complex workflows with the domain expertise and compliance guardrails the industry demands.

Med spas, wellness clinics, and aesthetics practices run on 5-10 disconnected tools — separate systems for scheduling, charting, payments, patient communication, and more. It's expensive, error-prone, and holds teams back. Decoda is the all-in-one EMR and practice management platform purpose-built for elective care. AI is woven into every workflow — from an AI front desk that answers calls and books patients 24/7, to an ambient scribe that generates clinical notes in real time, to automated patient follow-ups that keep calendars full. Scheduling, payments, memberships, inventory, and analytics all live in one place. Live in 150+ clinics, processing $100M+ in annual transactions.

We use generative AI to call insurance on behalf of healthcare clinics. We save clinics up to 40 hours of calls every week over existing outsourced human solutions. Compared to the existing solutions for benefits verifications: - We're faster -- by default, we have a turnaround of 24 hours compared to typically a 3 day turnaround for competitors - We can reach more payors -- as long as they have a phone line, we can support calling them for benefits. There's quite a few payors in both medical and dental (e.g. Seledent) that have yet to offer a digital retrieval of benefits - We're reliable and consistent -- there is no person-to-person variation or question skipping when it comes to working with software

Inventive is an AI-powered RFP & questionnaire response management platform that drives 70%+ efficiency in sales response workflows. **Core benefits and features:** - **10X Faster Drafts With Highly Accurate Responses**: Using Inventive’s proprietary AI-system you can get first drafts 10 times faster, with accurate responses rooted in your knowledge sources, that you and your team can collaborate on to refine. - **Single Hub for All Your Knowledge Sources:** Inventive offers a centralized hub for all your knowledge sources. You can upload previous RFPs and relevant documents; integrate with your internal data systems such as gDrive. Sharepoint & more; upload Q&A from legacy tools or spreadsheets; and even add information from your websites. - **Fight Stale Content With AI Content Manager:** Inventive’s AI content manager proactively flags conflicting content by identifying issues within your sources, so you only use fresh and relevant content in your responses. - **Higher Productivity & Competitive Advantage With AI Agents:** Inventive offers a suite of AI agents designed to boost productivity and give you a competitive advantage. These agents can help with researching competitors, brainstorming ideas, and more. Built by a customer-obsessed team comprising an ex-exec from a Fortune 500 company and ex-AI team from Google & Stanford. Backed by top Silicon Valley investors including YCombinator.

Corgea is an autonomous application security platform that finds and validates vulnerabilities, then generates safe code fixes developers can apply in their existing workflow. In production customers like Zapier and Yageo, see ~20% more true positives and ~90% fewer false positives (vs their prior tooling), reducing triage and speeding remediation without adding headcount.

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.

Artie is software that streams data from databases to data warehouses in real-time. Today, most companies run their ETL process every few hours or overnight, so their data warehouse is always out of date; with Artie, the warehouse always has live production data.