Founders Directory LogoFounders Directory

Discover the next generation of startups.

A curated directory of high-growth companies backed by the world's most prestigious venture capital firms.

104Companies

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Algolia logo

Algolia

YCombinator

A developer-friendly and enterprise-grade search API.

Our mission is to make every search interaction meaningful & rewarding, through developer-friendly and enterprise-grade APIs. Algolia is the leading Search & Discovery API for websites and mobile apps. We help the most innovative companies across e-commerce, media and SaaS industries create powerful, relevant and scalable discovery experiences for their users. Unlike other solutions, our hosted platform reduces the complexities of building and scaling a fast, relevant digital experience and helps teams accelerate development time. More than 9,000 companies like Under Armour, Twitch, Periscope, Medium and Stripe rely on Algolia to manage 50+ billion search queries a month. Founded in 2012, we're backed by $184M in funding from Accel Partners, Alven Capital, Point Nine Capital and Storm Ventures. The team is headquartered in San Francisco with offices in Paris, London, New York, and Atlanta. To learn more, visit www.algolia.com. --- We’re looking for talented, passionate people to build the world’s best search technology. As an ownership-driven company, we seek team members who thrive under autonomy and diversity. We're committed to building an inclusive and diverse workplace. We care about each other and the world around us, and embrace talented people regardless of their race, age, ancestry, religion, sex, gender identity, sexual orientation, marital status, color, veteran status, disability and socioeconomic background

San FranciscoY Combinator LogoWinter 2014ActiveDeveloper ToolsSaaSB2BSan Francisco
Ambition logo

Ambition

YCombinator

Coaching and gamification software for sales teams.

We motivate employees to reach their potential, empower managers to be great coaches, and ultimately help sales teams hit number with great culture. We do this through an extensive suite of coaching and gamification tools, all powered by sales activity data.

Chattanooga, TNY Combinator LogoWinter 2014ActiveSaaSB2B
Amplitude logo

Amplitude

YCombinator

Digital Analytics Platform

Since graduating from YC, Amplitude (W12) has made it to IPO and beyond by helping cutting edge startups become category leaders. We’ve pioneered the digital analytics category to become the go-to solution for AI pioneers (Cruise, Midjourney), apps that touch millions of consumers (Doordash, Coinbase), and the best in B2B (Atlassian, Rippling, Canva). With product analytics, experiment, CDP, session replay, and more, Amplitude’s digital analytics platform shows you what your users love, where they’re getting stuck, and what keeps them coming back. You want to build a generational business, and we have the capabilities and pricing plans to guide you every step of the way. Check out our special deal for YC companies and get started on your analytics journey.

San FranciscoY Combinator LogoWinter 2012PublicDeveloper ToolsB2BAnalyticsMarketingData VisualizationSan Francisco
Amulet logo

Amulet

YCombinator

Agents that drive customer success

Amulet helps post-sales teams monitor every account and automate the work that drives retention and expansion. Our agents connect to customer data (CRM, support, product usage, and communication data) to flag churn risks, surface upsell opportunities, track adoption, and draft the right messages for each customer.

San FranciscoY Combinator LogoSummer 2026ActiveSaaSB2BCustomer SuccessAI AssistantSan Francisco
Asseta logo

Asseta

YCombinator

Marketplace for industrial spare parts and capital equipment.

Asseta is an online marketplace for used capital equipment and parts. We utilize innovative software to bring buyers and sellers together so you can efficiently and transparently collaborate during equipment transactions. Our web based platform ensures easy price discovery for interested parties and high touch customer service. Today over $100B is spent on used manufacturing equipment offline via brokers and middlemen. This huge but un-sexy market has yet to be transformed by technology. The incumbent firms rely on large sales forces and the fragmentation of the market to charge huge margins. We believe in a better solution. Founded in 2013, Asseta is Y Combinator backed startup based in Newport Beach. For more information, visit www.asseta.com. Check out our AngelLilst profile here: https://angel.co/asseta?ref=startup_card

Newport Beach, CAY Combinator LogoSummer 2013ActiveMarketplaceB2B
Autosana logo

Autosana

YCombinator

AI agents for E2E testing across mobile & web

Autosana is the end-to-end testing layer for your coding agents, across iOS, Android, and Web apps. Step away from your laptop. Come back to full-stack features built and tested end-to-end, production ready. Autosana creates, updates, and runs tests automatically from your code diffs. Locally, it loops with your coding agent until every test passes. In PRs, it loops with cloud agents and shows video proof of your new feature or bug fix working end-to-end. No setup, no maintenance, just tests evolving with your codebase. Ship with confidence.

San FranciscoY Combinator LogoSummer 2025ActiveArtificial IntelligenceDeveloper ToolsB2BEnterprise SoftwareSan Francisco
Benchling logo

Benchling

YCombinator

Unlocking the power of biotech with modern software for modern science

Biotechnology is rewriting life as we know it, from the medicines we take, to the crops we grow, the materials we wear, and the household goods that we rely on every day. Biotech R&D is radically transforming our world, but to move at the new speed of science, scientists need better technology. Benchling’s mission is to unlock the power of biotechnology. The world’s biotech leaders and innovators use our R&D Cloud to power the development of breakthrough products and accelerate time to milestone and market.

San FranciscoY Combinator LogoSummer 2012ActiveSaaSB2BBiotechSan Francisco
Bluma logo

Bluma

YCombinator

Canva for short-form video ads

Bluma is the first AI short form content engine. In a post-AI world, attention is the most valuable commodity. Social media is only growing faster and faster, and we're still early. We automate your entire consumer marketing strategy by cloning your competitor's viral videos. Everything that a growth team would plan, script, produce, and edit, Bluma can clone end-to-end and at scale.

San FranciscoY Combinator LogoFall 2025ActiveB2BSocial MediaVideoMarketingAdvertisingSan Francisco
Boom AI logo

Boom AI

YCombinator

AI agents that recover lost revenue through real conversations.

Boom reaches out to your customers before you lose them. We run proactive outbound conversations at scale: recovering churned users, re-engaging drop-offs, and protecting revenue you thought was gone. AI agents hold real conversations with your customers over SMS, email, WhatsApp, or phone, in their language, on the channel they actually answer. Every month, companies lose 5-15% of revenue to churn, and more walks out through abandoned signups and failed onboarding. The tools built to fix this don't work. Win-back emails get ignored. Cancel flows only catch people at the door. Hiring humans doesn't scale. Boom does the one thing that works: a real conversation. 1,000x the reach of manual outreach, and the customer can reply.

San FranciscoY Combinator LogoFall 2025ActiveArtificial IntelligenceB2BE-commerceSMBAISan Francisco
Captain logo

Captain

YCombinator

Give AI agents accurate knowledge search that scales

Captain delivers the most accurate file search engine built for AI agents. We’ll index data from the sources folks already use like S3, SharePoint, and Google Drive, and easily scale multimodal, petabyte-level content search. We’re the Snowflake for Unstructured Data. Captain tops the Open-RAG-Benchmark with over 20% higher accuracy than standard RAG pipelines. We achieve this through robust data processing techniques like embedding normalization across modalities, ensuring that representations cluster by semantic content rather than data type.

San FranciscoY Combinator LogoWinter 2026ActiveB2BAPIData EngineeringInfrastructureSan Francisco
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