Nov 13, 2025 12:28:13 PM

Companies


Showing 301-325 of 5661 companies
YC W12
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Ark

Ark organizes the world's social information.

Ark.com is a search engine for people. With Ark, you can search for new people, old classmates, new business contacts, and even your friends. With over a billion social network profiles indexed, and using a modern architecture, Ark provided the most comprehensive people search engine in the world. Prior to founding Ark, our team has experience at Google, AOL, Symantec, Lithium, Yahoo! Research and Y-Combinator.

YC S20
Arketa logo

Arketa

Everything for your fitness or wellness business.

All in one platform for online and in-person classes, video on-demand, courses and website hosting.

YC W22
Armilla AI logo

Armilla AI

AI/LLM Assessment & Warranty Solutions

Using industry-leading AI/LLM evaluation technology, Armilla AI provides third-party AI assessment and warranty solutions, backed by leading reinsurers Swiss Re, Greenlight Re and Chaucer. Vendors of AI-powered products leverage Armilla’s assessment to anticipate customer questions, respond to enterprise RFPs, meet regulatory requirements, build trust in the reliability of their solutions - and ultimately, to accelerate sales. Armilla’s clients include enterprises along with AI-first start ups & scale ups in Fintech, Insurtech, Healthtech, Legaltech, HRtech & more.

YC W17
Armory logo

Armory

Continuous Deployment at any scale, for all developers.

Your software is your competitive advantage, and your customer experience is everything. Armory Continuous Deployment solutions empower you and your teams to confidently deploy every application, every time; safely and securely, so you can accelerate your time-to-market, increase stability, and decrease customer-impacting issues.

YC W22
Arpari logo

Arpari

Multibank treasury management

Treasury management platform built for multibank finance teams. Seamlessly consolidate company finances and manage payments financial operations from a single dashboard.

YC S19
Arpeggio Bio logo

Arpeggio Bio

Arpeggio Bio develops drugs targeting transcription factors using AI…

Arpeggio Bio is a pioneering pharmaceutical company that develops drugs targeting transcription factors using AI and high-throughput RNA-sequencing. With $20M in venture funding, we've targeted "undruggable" proteins like NRF2, TEAD, and GPX4 where our lead program is rapidly progressing towards a DC for the treatment of IO-resistant melanoma. With partnerships with J&J and FORMA, we've validated our platform in rare disease and inflammation with a significant Phase I success.

YC W21
Arpio logo

Arpio

Recover from any outage in 10 minutes or less.

Arpio is a SaaS that eliminates downtime for AWS applications by making it easy to recover from any outage in just a few minutes.

YC S22
Array Labs logo

Array Labs

We're building satellites to create a real-time 3D map of the world.

We're designing swarms of tiny satellites which will work together to create the first real-time, high-resolution 3D model of the earth. By using clusters of satellites to image the same place on the earth at the exact same time, we can improve image quality by more than 60x over conventional techniques. This technology will massively increase the amount of affordable, high-quality 3D data, enabling a host of new applications across an array of industries, including AR/XR/Autonomy, Defense, Climate/ESG, and Insurance Analytics.

YC S21
Arrow logo

Arrow

Modern Checkout Platform for D2C brands in Southeast Asia

Arrow makes it easier and faster for sellers and shoppers to safely sell and buy online in Southeast Asia. It is first in Southeast Asia to provide brands a better, more profitable checkout experience for their shoppers. Arrow was created to partner with merchants to build consistent and seamless hyperlocal checkout experiences wherever their shoppers come across their brands.  Shoppers checkout securely with their preferred payment methods. They no longer have to set up new passwords, face multiple redirects or set up a new account every time they shop. Built specifically for Southeast Asia, Arrow works anywhere that shoppers prefer to shop from. Southeast Asian shoppers love the simple and hassle-free solution since almost everyone in this region shops on their mobile devices. With Arrow, merchants sell more of what they are selling; and shoppers conveniently and easily checkout wherever they shop.

YC W23
Arroyo logo

Arroyo

Cloud-native stream processing

Arroyo is a serverless stream processing platform built on top of the open-source Arroyo streaming engine. We allow companies to transform, filter, aggregate, and join their Kafka streams in real-time just by writing SQL. We charge purely based on usage, with no fixed costs or clusters to manage.

YC S22
Artemis Search logo

Artemis Search

A search technology that actually finds what you’re looking for.

Artemis Search is a vector database search with a twist. We use special-purpose deep-learning models instead of using textual / semantic similarity to evaluate how good a search result is. This enables us to actually reason how well search results match the intent of the search query, eliminating the problems that come from evaluating search results on how much they look like the search query.

YC W17
Arthena logo

Arthena

Quantitative Investment in Art Assets

Arthena is a financial product that gives you access to the alternative asset class with the highest barrier to entry and strongest historical returns. We invest in the most liquid segment of the art market, with the lowest volatility, yielding tremendous growth uncorrelated to traditional investments. Arthena’s automated and data driven investment strategy regulates art investment by building traditional fund structures. HNWI’s can now securely and confidently diversify their portfolios into alternative assets focusing on the luxury market. Arthena has designed and built a statistically rigorous model that estimates the value of artwork over time. Since the data we obtain derives from auction records and repeat sales, our model relies on a set of features about each result. These features include include the artist’s name, medium, date of creation, origin of location and size of work. After identifying groups of work that are similar to each other, we calculate the expected ROI and estimated volatility based on the distribution of gains. Using historical auction results to simulate the performance of our funds, we leverage Monte Carlo analysis to determine annualized returns and sharpe ratios. Based on this analysis, Arthena can validate the financial viability of our product and establish statistically rigorous bounds for these estimates.

YC F25
Articulate logo

Articulate

Speeding Up Construction with AI

We help construction and solar contractors eliminate delays, confusion, and rework. We audit designs for code compliance before construction starts, detect clashes early, and automatically generate RFIs from drawings. We also accelerate takeoffs, estimating, and trade package alignment so preconstruction teams can move faster with fewer errors. From RFIs to permits to supplier updates, everything runs automatically so teams can focus on building, not waiting. We integrate with Procore, Outlook, Gmail, Bluebeam, Autodesk, and other tools you already use. Teams use us to: - Save $3,000,000 per project - Catch design and coordination errors before they happen - Verify code and permits instantly - Align trade packages and scopes automatically - Speed up takeoffs, estimating, and procurement - Get real-time updates from every crew Contact us founders@usearticulate.com to learn more!

YC S23
Artie logo

Artie

Software that streams data from databases to warehouses in real-time

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.

a16z SR005
Artifact logo

Artifact

System of intelligence for accounting

Artifact deploys custom agents for accounting firms and finance professionals. Our edge is ground breaking accuracy for ledger posting and reconciliation workflows.

YC W25
Artifact logo

Artifact

An Collaborative, AI-native IDE for Hardware Engineers

Artifact is a collaborative IDE for hardware engineers - accelerating every step in the engineering lifecycle: Design → Procurement → Manufacturing → Integration → Test → Sustainment We've raised $3.5M to build an integrated, verifiable AI copilot with an intuitive UI that reflects how hardware actually gets built. Every artifact is auto-generated and traceable to a single-source of truth. We believe hardware engineering should be rigorous, deliberate, and system-aware. We work directly with customers solving the world's hardest technical problems to modernize how complex hardware is engineered. If you're interested, send your resume & contact info to: careers@artifact.engineer

YC W25
Artificial Societies logo

Artificial Societies

We use AI to simulate entire human societies

Artificial Societies uses AI to simulate large groups of people and how they interact. Companies like Anthropic and 11x are using Artificial Societies to predict how their marketing and content will perform in a simulation of their target customers, before launching in the real world. This is a cracked team: James left rural China at age 14, got into Cambridge, turned down a CS PhD to do startups, and - in his spare time - lead the largest ever study of an LLM society. James is joined by Patrick, an applied behavioural scientist who has run over 200 real-world experiments for businesses including Fortune 500 companies. We joined forces through a shared frustration that no one really understands large scale human behaviours: traditional market research is not only slow and expensive, but fundamentally flawed - it misses how people influence each other. Humans are not isolated individuals, we are social animals. We began by simulating a network of 1,000 investors, and used it to raise a pre-seed and get into YC. Since releasing this publicly as “Wave”, startup founders have run over 3000 simulations. We have since released "Reach", where anyone can simulate their own LinkedIn audience and test how their posts will perform before posting for real. Artificial Societies is doing for simulations what ChatGPT did for LLMs - making them accessible to everyone. As AI advances, we will create representative models of entire human societies. Our vision is a world where all content, products, and policies are first simulated in an Artificial Society. We are on a mission to create Artificial Collective Intelligence - humans innovate in collectives, we want to scale collective innovation with ACI.

YC S21
Artillery logo

Artillery

The complete production quality platform. AI-powered E2E testing,…

Supercharge your Playwright E2E testing, run scalable load tests, and automate production monitoring with synthetic checks — all in one platform. Built for engineering teams who want to ship fast without performance & reliability risks. Used by thousands of developer teams to help keep their production systems fast & reliable.

YC W24
Artisan logo

Artisan

AI employees called Artisans, starting with an AI BDR

At Artisan, we’re building real AI employees - not copilots, not assistants, but autonomous teammates. Our first, Ava, is an AI BDR. She finds and researches leads, writes emails in customers’ tone of voice, runs outbound sequences, self-optimizes, and manages email deliverability infrastructure. She learns, adapts, and improves over time - just like a human would. Human team members use Artisan as their primary working platform, replacing a sprawling stack of sales tools, and have Artisans working alongside them. We went through Y Combinator (W24) and have raised $35M+ from top investors. We’re at $6M+ ARR, with hundreds of customers including Remote, Quora, and SumUp. We’re currently working on Ava 2.0, pushing the boundaries of what an AI employee can do. And we're hiring.

YC W24
Artos logo

Artos

Authoring documents for life sciences in minutes, not months.

Artos is an AI-based document-drafting platform that helps life sciences companies turn their data into critical documents in minutes. These submissions currently take months and are the final hurdle before life sciences companies are allowed to sell their product.

YC S24
Arva AI logo

Arva AI

AI Agents to scale AML, KYB and KYC operations

Banks and fintechs have large teams of human analysts who conduct manual checks and reviews. We replace those human compliance analysts with AI agents that automate 80% of the manual work for faster and more compliant financial crime (AML) reviews. Our first three products are: Screening AI (discount 91% of screening alerts), KYB/C AI (speed up onboarding), Transaction Monitoring AI (handle AML transaction monitoring alerts) Our end goal is to have a whole suite of AI workers that can handle manual compliance work for banks and fintechs. A $24B opportunity in the US alone.

YC W17
Arylla logo

Arylla

We connect products to the internet using an invisible, chip-less tag

Arylla has created a printable tag that can be scanned with any phone using our API. We piggyback on legacy commercial printers to get our tag onto products at scale and license our API to developers who build services on top of our tag. We are 10x less expensive and much more scalable than alternatives like NFC.

YC W19
Ascen logo

Ascen

EOR for the staffing industry

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

YC F24
Asha Health logo

Asha Health

We help medical practices become AI-native

Asha Health is building the future of self-learning generative AI for healthcare.

YC W19
Ashby logo

Ashby

All-in-one recruiting platform that empowers hiring excellence in…

At Ashby, we're improving the productivity of working professionals with intelligent and powerful software. We put a lot of effort into designing products that are approachable to beginners but mastered & extended by power users. In many ways, spreadsheets set the bar here. Our first products provide talent teams with clever automation, powerful analytics tools, and customizable workflows packaged in great UX. We have many paying customers who love us and use us every day like Opendoor, Airtable, Duolingo, and Notion. Notion's Head of Talent said Ashby is "probably the tool we are in the most and rely on the most, as a recruiting team." Our culture is motivated by Abhik's (my co-founder and Head of Engineering) and my belief that a small talented team, given the right environment, can build a great product and service fast (and work regular hours!). We hire exceptional, kind, thoughtful people and provide an environment where we can be happy, feel challenged, and do our best work. We are well funded and backed by great investors, including Y Combinator, Elad Gil, and Lachy Groom. We'll share more once we meet!