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280 North logo

280 North

YCombinator

280 North is a web application company based on their proprietary application framework, Cappuccino. Along with Objective-J, Cappuccino provides a complete toolkit to develop rich web applications. It's modeled after a proven desktop development environment, and has been released as an open source project under the LGPL. 280 North's first application, 280 Slides, enables anyone with a web browser to quickly and easily create beautiful presentations. 280 Slides takes advantage of the web by making it trivial to find and include great media in your presentation. We also built in advanced features like importing and exporting PowerPoint documents, so your data is always portable.

B2BSan Francisco
64x Bio logo

64x Bio

YCombinator

Enabling next generation medicines. A comprehensive platform and…

The future of medicine is taking shape, but scaling it remains a challenge. Some of the biggest breakthroughs in next generation therapies are being held back by manufacturing constraints. The science is moving fast, but the infrastructure is still catching up. Our VectorSelect platform is designed to unlock the scale these therapies need to survive. We combine massively parallelized screens with computational insights to engineer high yield cell lines and production technologies — accelerating the manufacturing of advanced therapies from the inside out.

HealthcareSan FranciscoGene TherapyMachine Learning
7cups logo

7cups

YCombinator

7 Cups is an emotional support service that matches up people that…

7 Cups of Tea is an on-demand emotional health and well-being service. Our bridging technology anonymously & securely connects real people to real listeners in one-on-one chat. Anyone who wants to talk about whatever is on their mind can quickly reach out to a trained, compassionate listener through our network. We have hundreds of listeners who come from all walks of life and have diverse experiences. People connect with listeners on 7 Cups of Tea for all kinds of reasons, from big existential thoughts to small, day-to-day things that we all experience. Unlike talking to family or friends, a 7 Cups of Tea listener doesn’t judge or try to solve problems and say what to do. Our listeners just listen. They understand. They give you the space you need to help you clear your head.

Virginia Beach, VASummer 2013ActiveMental Health Tech
80,000 Hours logo

80,000 Hours

YCombinator

An online guide that tells talented graduates how to maximise the…

We provide research and support to graduates who want to use their careers to make a big positive impact in the world. We have an online guide that tells you new ways to make an impact, and one-on-one advice & introductions to help people take action.

London, United KingdomSummer 2015ActiveNonprofit
9 Mothers logo

9 Mothers

YCombinator

Counter Drone Systems. $1.6m sales. We delivered for the DoW.

We have sold $1.6m of systems to the DoW. Multiple systems delivered to the DoW. Our first product - EDDA - is a counter drone system - small, low power, low cost fully autonomous-capable. It's designed to be used on vehicles, bases, or carried - to stop group 1 suicide drones. We have multiple contracts, sales, etc. We have 3 more products with demand in various stages of development. More details at https://9mothers.com

Austin, TXSpring 2026ActiveAustin
9gag logo

9gag

YCombinator

Make the world happier.

9GAG is the global cross-platform entertainment media network. It is a place for fun, conversation, and engagement. Founded in 2008, 9GAG’s mission is to make the world happier. 9GAG has a total of 150 million global audience with 39 million followers on Facebook, 44 million on Instagram and 15 million on Twitter. Being #1 ranked global social media platform in entertainment & gaming, #1 ranked US's cross-platform video creators, we distribute 2.2 billion social video views on a monthly basis (source: tubular labs). 9GAG.com is #6 most followed brand on Instagram and is a top 200 website globally. 9GAG is backed by: Freestyle Capital, True Ventures, First Round Capital, Greycroft Partners, 500 Startups, Y Combinator and a group of great angel investors in the United States. eg Anthony Soohoo, Benjamin Ling, BoxGroup, Gary Vaynerchuk, James Hong, Kevin Rose, Karl Jacob, Lowercase Capital, Maneesh Arora, Naval Ravikant, Othman Laraki, Philip Kaplan, Rich Chen, Rich Lefurgy, Scott and Cyan Banister, Tim Ferriss.

Hong Kong, Hong KongSummer 2012ActiveSocial MediaSocialSocial Network
Abacus logo

Abacus

YCombinator

Making expense reports obsolete

Abacus is the only real-time expense management solution to reimburse your team, reconcile corporate cards, and automate your expense policy. By eliminating the month-end expense report, Abacus turns submitting and approving expenses into a delightful, collaborative experience. With our mobile app, you'll quickly submit and approve expenses on the go and reimbursements now happen within days. Abacus syncs with your accounting software and auto-matches transactions for hassle-free bookkeeping. Come work with us! We're hiring: abacus.com/about#hiring

B2BNew York City, NYFintechSaaSPaymentsB2B
Abatable logo

Abatable

YCombinator

Carbon markets platform and solutions

Abatable is a carbon offsetting procurement platform which connects companies with carbon project developers of high quality carbon offsets. Abatable facilitates procurement decisions by offering third party quality assessments of projects and by standardizing multi-year purchase agreements and an automated RFP platform. The team has extensive experience advising institutional investors on nature-based carbon removal and impact investment portfolios and is backed by leading investors like YCombinator, BlueBear Capital and Global Founders Capital.

IndustrialsLondon, United KingdomCarbon Capture and RemovalB2BClimate
Abstra logo

Abstra

YCombinator

Automate finance operations with Python and AI

Abstra is a platform that allows finance teams to build, run, and automate their workflows using Python and AI. Instead of relying on spreadsheets, ERPs, and manual processes, teams can create programmable workflows for tasks like reporting, reconciliations, approvals, and integrations with systems like SAP. We provide a developer-friendly environment where finance and technical teams can turn business processes into code, connect to their existing tools, and run everything in a controlled, auditable way. Our goal is to become the operating system for finance operations, where workflows are not static or manual, but versioned, automated, and continuously improved.

B2BSão Paulo, BrazilArtificial IntelligenceSaaSFinanceB2BAutomation

Abundance Labs

YCombinator

Abundance Labs incubates and builds alternative currency marketplace…

ConsumerSan FranciscoMarketplaceCryptocurrency
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