Y Combinator Startups in Boston that are currently hiring 2025

Sandbox Banking provides a low-code platform to quickly build and run banking integrations. Our software is literally a web application named Glyue, and it's typically used by banks, credit unions, and fintechs to connect banking systems. Glyue integrations are often web service APIs, batch ETL jobs, file/document transfer jobs, or event-driven pub/sub services (e.g. web hooks, Kafka streaming data pipelines).

Biobot Analytics develops cutting-edge technology to transform sewers into public health observatories. Wastewater contains valuable information about the health of communities. We collect it. We analyze it. We tell you how to leverage it to make your city better. Our first product is to measure opioids and other drug metabolites in sewage to estimate consumption in cities. With this data, those working on harm reduction can assess the scope of the epidemic, allocate resources, and gauge the effectiveness of programming over time.

We deploy location beacons to track the movements of patients and doctors, measure the inefficiencies in the doctors’ workflows, and then give the hospitals targeted recommendations on how to improve.

Alpha Vantage provides enterprise-grade financial market data through a set of powerful and developer-friendly data APIs and spreadsheets. Whether you need traditional asset classes (e.g., stocks, ETFs, commodities), economic metrics, foreign exchange rates, cryptocurrencies, fundamental data or even technical indicators, Alpha Vantage is your one-stop shop for global market data delivered through REST APIs.

Ascen is a back office platform and employer of record for staffing firms.

Community Phone Company YC W19 built a simple cloud phone system that runs inside of landlines Our solution lets a business or family get all modern voice features (re-route if busy, greeting menu and IVR, programmable caller ID, cloud voicemail, etc) on their existing desk phone and existing cell phones. All employees onboard instantly, no wifi required, no app to download.

Software that simplifies electric grid forecasting and operations. Clients--hard assets like wind, solar and energy storage--get timely, unbiased information to improve revenues, reduce risk, and maximize the profitability of every megawatt. Gaiascope also manages a quant fund trading electricity; with this fund, the company builds additional credibility with clients and accelerates the continuous improvement of its software.

Metaplane ensures everyone trusts the data that powers your business. Data teams at Bose, Ramp, and Klaviyo use our data observability platform to prevent and detect data issues — before the CEO pings them about weird revenue numbers. We do this with ML-based anomaly detection, end-to-end column-level lineage, and tools to help prevent incidents before they occur. You can monitor your entire data stack within 30 minutes. The company is backed by Khosla Ventures, Y Combinator, and the founders of Okta, HubSpot, and Vercel.

Nextera Robotics is an AI-native Robotics and Industrial Automation company founded at MIT.

Our mission is to enable pharmaceutical and biotech companies to bring more antibody therapies to patients. Using AI and massively parallel experimentation, we design antibodies that precisely bind the disease target at the right location, while minimizing manufacturability and toxicity risks. We are a well-funded, revenue-generating, bilingual company of wet- and dry-lab scientists, and are founded by AI and protein design experts from Harvard University.

REGENT is building a new mode of transportation that will redefine regional mobility by mid-decade. Their first product, the seaglider, is an all-electric, hydrofoiling boat-plane that operates within a wingspan of the water's surface. By flying low on a cushion of air, seagliders unlock the ability to fly twice as far as an electric aircraft, while being regulated by maritime authorities enabling market entry for a fraction of the cost. REGENT has de-risked seaglider technology with a ¼-scale, 400 lb, flying demonstration vehicle and a full-scale wing test section. By 2024, REGENT will fly humans on the first full-scale prototype seaglider. By mid-decade, REGENT’s customers - airlines and ferry companies – will begin commercial seaglider service on the 12-seat initial product. In just two years, REGENT has accumulated $8B in provisional orders (including firm deposits) proving the potential of the $25B+ initial market. REGENT, a team of 40, is led by MIT-trained, ex-Boeing engineers Billy Thalheimer and Mike Klinker. REGENT has raised $50M to date from the likes of Thiel Capital, Founders Fund, Mark Cuban, Y Combinator, and includes strategic investment from Japan Airlines, Hawaiian Airlines and Mesa Airlines.

Navigating chronic illness is an isolating and lonely process which ultimately reduces medical adherence and adversely impacts outcomes. There are over 100 deadly chronic conditions as 1 out of 2 Americans is currently living with at least 1 chronic condition. The US healthcare system has over $1 trillion dollars in direct costs. Medical adherence rates for therapeutic programs and medicine are only 50% because patients feel lonely, isolated, and unsupported in their chronic illness journey. Reviving Mind is an in-network telehealth provider that improves clinical outcomes and program adherence for the senior medicare and medicare-advantage population that is plagued with loneliness and chronic illness. This is done through a novel and proprietary clinical program and technology platform that integrates virtual, private, curated, and professionally led groups that scale up to 8-patients with individualized and goal oriented lifestyle medicine coaching that is automated but managed by a licensed provider. Scaling rapidly across the United States.

FlyCode Dunning & Payment Management AI that helps subscription merchants maximize revenue. We reduce passive churn by managing payment failures intelligently. We’re Jake, Etai, and TD and we’re building FlyCode. TL;DR: If you sell SaaS or B2C subscriptions, we’re here to help you recover lost revenue due to failed payments and involuntary churn. ‘Involuntary’ or ‘Passive’ churn is a hidden Revenue Killer 💳 for Subscription Businesses ❌ THE PROBLEM: Recovering Failed Payments is Complex Involuntary churn refers to the loss of subscribers due to payment failures, not due to them actively canceling. While it is both possible and a worthwhile strategy to attempt to win back a customer during the cancellation process — involuntary churn is not intentional and in most cases, your customers aren’t even aware that their payment failed. 💰 Bottom line? Effective payment optimization does reduce involuntary churn and will increase ARR by as much as 5-10% FLYCODE SOLUTION 💡 FlyCode leverages ML and AI to provide Payment Optimization and smart payment retries to maximize subscription revenue and reduce churn. We apply a unique model tailored to each Merchant and their customers to ensure optimal results. ⚡️Automatically recover failed subscription payments and reduce passive churn ⚡️Use ML & AI based payment optimization to find the best time to charge your customers ⚡️ Improve customer experience by coordinating payment retries with customer emails/SMS 🛠️ We support OOTB + Custom Integrations for Merchants and White-Label for Platforms