Engineering, Product and Design Startups funded by Y Combinator (YC) in the San Francisco Bay Area that are currently hiring 2025

Cognito is the highest converting ID verification system on the market. By starting with just a user's phone number, Cognito can verify their name, date of birth, address, phone, and Social Security Number. The strong link formed between a user and their phone number builds trust while reducing friction.

Scale accelerates the development of AI within organizations of any size to deliver critical business insights and operational efficiency. Its data-centric infrastructure platform leverages RLHF (Reinforced Learning with Human Feedback) to help organizations build the strongest AI models that supercharge their business, with customers across industries including Meta, Microsoft, U.S. Army, DoD’s Defense Innovation Unit, Open AI, General Motors, Toyota Research Institute, Brex, Instacart and Flexport.

Rescale is a cloud-based platform for computational engineering and R&D, that empowers engineers and researchers to accelerate discovery, testing, and optimization. We democratize access to the latest technologies that drive greater efficiency and competitiveness, including high performance computing, simulation, modeling, AI/ML, and digital twins. The majority of industry leaders worldwide use Rescale as the backbone of R&D, connecting the digital thread of new product innovation to develop products that enrich humanity, from autonomous vehicles to drug discovery. Rescale customers include 7 of the top 10 automotive companies and 3 of the top 6 life science companies. Rescale’s full-stack, open platform automates systems, data, and workflows into a user-centric experience, so customers can focus on innovation. Choose from 1000+ pre-installed applications for multiphysics simulation and AI/ML-assisted design exploration, including commercial, open-source, and custom software. We offer the largest global network of hyperscale and specialty cloud infrastructure to leverage the latest CPU, GPU, and other specialized architectures. Rescale is enterprise-ready to enable any size organization to achieve their digital transformation goals–with unified management that gives IT teams full visibility and control of hybrid-cloud operations. Rescale’s intelligent automation gives customers flexibility to improve performance and reduce costs of computing, while our enhanced security and compliance ensures industry-leading standards are met from end to end. Getting started is simple, flexible, and free to try. Our team of experts is ready to help you achieve your most ambitious engineering goals – schedule a demo today. Join us and help us build products that change the world: www.rescale.com/careers

Built by electrical engineers for electrical engineers, SnapMagic removes monotony so that engineers can do their best work. SnapMagic’s electronic component data is used by over 1.5 million engineers across the world’s largest organizations. Its new AI Copilot will change the way that every engineer designs electronics. Join at www.snapmagic.com.

Deepgram is a foundational AI company on a mission to understand human language. We give any developer access to the most advanced speech AI transcription and understanding with just an API call. Our models deliver the fastest, most accurate transcription alongside contextual features like summarization, sentiment analysis, and topic detection. Beyond that, developers can: 🔊 Process live-streaming or pre-recorded audio 🌎 Transcribe in dozens of languages ⚙️ Train custom models for unique use cases 🔑 Access deep NLU with a unified API 💻 Build in any programming language with our SDKs ✅ Deploy on-prem or on DG’s managed cloud 📈 Get scalable GPU infra for training and inference Deepgram is a proud NVIDIA partner and Y Combinator company, and we recently completed a $72M Series B to define the future of AI Speech Understanding, making us the most-funded speech AI company at its stage.

Nanonets is an AI-driven solution that automates document processing and data extraction workflows. Leveraging advanced Optical Character Recognition (OCR) and deep learning models, Nanonets helps companies automate document-heavy business processes like accounts payable, order processing and insurance underwriting. Nanonets processes unstructured documents such as invoices, receipts, purchase orders, contracts, claims, and forms and converts them into structured output.

Imbue builds AI systems that reason and code, enabling AI agents to accomplish larger goals and safely work in the real world. We train our own foundation models optimized for reasoning and prototype agents on top of these models. By using these agents extensively, we gain insights into improving both the capabilities of the underlying models and the interaction design for agents. We aim to rekindle the dream of the *personal* computer, where computers become truly intelligent tools that empower us, giving us freedom, dignity, and agency to pursue the things we love.

Helping product builders to listen to users at scale so they can make something people want.

Manage the words across your team’s product from design to production.

Roboflow enables developers to make the world programmable. Use our tools to build better datasets (collect image, video / annotate), models (foundation and fine tuned small models), and deployments (self hosted, edge, APIs, SDKs) for computer vision. Over 250k developers, including those from over half the Fortune 100, build with our open source and hosted tools. Build with us: https://app.roboflow.com Hack with us: https://roboflow.slab.com/public/posts/roboflow-hackathons-external-u478m1iz Work with us: roboflow.com/careers

Seam lets developers connect and control 3rd-party connected devices like door locks, thermostats, and more.

Great Question puts customer research on autopilot - from recruiting participants, scheduling interviews, sending surveys or prototype tests - and sharing what you learn with your team. Companies like Adidas Runtastic, O'Reilly Media & MainStreet use us to put their customers at the center of their product, design & marketing decisions.

We are bringing the competitive advantage data-driven engineering teams like Google have - to everyone else. Our analytics platform plugs directly into developer tools like Github to provide insights on delivery speeds, bottlenecks, and risks that impact team velocity & developer happiness. We're trusted by some of the world’s most innovative teams: Microsoft, The Economist, and Indiegogo and backed by Y Combinator, Soma Capital, Funders Club, and strategic angels (Founder @Optimizely, SVP Sales @Amplitude) . Haystack is a culture of tinkering, learning, testing and iterating. We ship quickly and help our customers do the same. We're led by founded by two technical founders who have experienced this problem first-hand after scaling their startups from 0 to 100m+ users.

We're building a visual application development platform to dramatically improve the time to market and quality of digital experiences. FlutterFlow helps companies and product teams improve developer efficiency, accelerate project timelines, and reduce costs for large-scale business applications. Our customers include some of the largest banking, consulting, telecom, and manufacturing companies in the world. We have more than 1.3M users in more than 200 countries and regions around the world. We’re a remote first team headquartered in the San Francisco Bay Area. We have offices in Mountain View, New York City, and Singapore.

AI Agents for Engineering Leadership. Designed to boost productivity, predict outcomes, and support team well-being, these agents will provide insights into team mood and challenges and offer practical improvement suggestions.

Openlayer helps you test and monitor high-quality AI systems.

Replo helps companies sell on the internet. We do this by helping marketing teams automate building and testing customer journeys using data and AI.

OneSchema is the embeddable CSV importer used by product and engineering teams to save months of development time and to automate CSV mapping, validation, and transformation.

Mach9 is at the forefront of leveraging advanced machine learning and computer vision techniques to transform geospatial data into actionable insights for urban development and infrastructure management. Our cutting-edge technology automates the detection and analysis of key urban features, aiding in the planning and maintenance of transportation networks.

Squire is a devtool that works with you by writing pull request descriptions, reviewing PRs, and writing code to implement code review feedback.

Aviator is a developer tool that automates merge workflows and keeps builds healthy. Engineers save up to 5 hours a week and avoid frustration of broken builds. Our users include Slack, Bosch, Lightspeed, Square, Benchling, Figma and many others. For instance, Slack went from 180 master-build failures per quarter to just 1 build failure when they started using Aviator. Our goal is to become the leading brand for developer experience.

Next-Gen API Documentation with AI Brilliance. Generate Stripe-like API docs in just a few seconds.

Apptimize enables organizations to enhance their native iOS and Android apps to create amazing user experiences, improving acquisition, engagement, and retention. We do this with a platform that empowers product teams to efficiently run A/B tests, make instant updates, and personalize user experiences through staged and segmented rollouts. Apptimize, based in San Francisco, is backed by US Venture Partners, Google Ventures, Y Combinator, and others. Top apps including The Wall Street Journal, Vevo, HotelTonight, and Strava use Apptimize to continuously drive mobile growth.

Monterey AI helps companies understand what actions to take to improve engagement and reduce churn by setting up user feedback channels, auto-collecting, and analyzing qualitative feedback and quantitative data from multiple sources.