Nov 18, 2025 01:48:01 PM

Companies


Showing 4001-4025 of 5661 companies
YC W24
Resonance logo

Resonance

Self-improving content bank for marketing

Resonance hyper-personalizes MarTech campaign content and automatically refreshes and stores high performing content for re-use.

YC S23
Respaid logo

Respaid

Respectful B2B Debt Collection, Powered by AI

We recover up to 85,000 invoices per day and get 50% paid within 20 days on average. Respaid uses AI to respectfully collect overdue B2B invoices. Just give us an excel file—no attached invoices needed. We integrate with your stack or work standalone, protecting your brand's reputation while maximizing collections through our AI-powered, respectful approach.

YC S20
Response logo

Response

Control indirect spend from end-to-end.

At Response, we simplify how ops teams manage indirect spend—everything from office supplies to maintenance materials and packaging. Our platform streamlines procurement, cutting ordering and approval times by up to 92% and helping companies save up to 13% by centralizing purchases with their existing vendors.

YC W21
Resquared logo

Resquared

Marketing automation platform for selling to local businesses.

Local businesses were the hardest B2B segment to reach, but account for over 60% firms in the U.S. Our SaaS application has data on every local business that are easy to get in touch with using our specialized marketing automation tools and workflows. Resquared has been proven to save sales pro's over 3 hours per day and result in 53% stronger leads (case study on website).

YC W16
R

Restocks

Buy sneakers and streetwear here

Restocks offers its users with instant notifications when the brands they like releases new items, restocks, and go on sale. The company offers its users with commerce and builds engaging shopping experiences on mobile platforms. It is funded by Y Combinator and angel investors. It helps its users stay updated with the brands they like, choose the updates they care about, view recent releases, restocks, and price drops, check stock and buy without leaving the app, and save profiles to check out. Restocks is a U.S.-based company that was founded in 2015.

YC W24
RetailReady logo

RetailReady

An AI-powered supply chain compliance engine

Every time workers in a warehouse box an order, they reference a 100 page manual with instructions like where to put the shipping label. RetailReady replaces the instruction manual with a tablet application.

YC W23
Retape logo

Retape

AI workers for debt settlement

Automating call center operations at debt settlement companies, with AI that plugs into CRM, identifies debts to settle, and negotiates with creditors over the phone.

YC W24
Retell AI logo

Retell AI

Supercharge Your Contact Center Operations with AI Phone Agents

The leading platform for building and managing AI voice agents that revolutionize contact center operations.

YC S09
R

RethinkDB

The open source database for the realtime web.

RethinkDB is the first open-source scalable database for the realtime web. It exposes an exciting new access model -- instead of polling for changes, the developer can tell the database to continuously push updated query results to applications in realtime. RethinkDB allows developer to build scalable realtime apps in a fraction of the time with fewer engineering resources. RethinkDB features a pleasant and powerful query language that has useful queries like table joins and groupBy, a highly parallelized architecture, and web tools for managing clusters.

YC W21
Rethoric logo

Rethoric

LinkedIn content & strategy for founders to get 1M monthly impressions

Rethoric is a plug-and-play content team specialized in helping founders publish high-quality content consistently and grow on LinkedIn to get 1M+ monthly impressions. Most founders know the value of building an audience on LinkedIn, but the process demands consistency, time, creativity, writing skills, and energy—things founders often lack. Our clients only need to attend a monthly content interview session, and we do the rest.

YC F24
Reticular logo

Reticular

Interpretable AI for drug discovery

Reticular helps pharma companies discover drugs with AI models like AlphaFold by making them steerable, just like you can prompt LLMs. Today, limited validation data means companies spend millions on failed experiments trying to steer these models through trial and error. We’re piloting our AI interpretability technology with early-stage biotechs and scaling rapidly. Just a week after our pivot, we identified the first interpretable features ever found in protein models, allowing precise control over biological functions. Nithin and John met competing in Biology Olympiads before spending 4 years as roommates at MIT publishing ML/bio research in NeurIPS and Nature. We believe biological models encode far more information than anyone is currently using - our goal is to unlock this potential.

YC W17
Retool logo

Retool

Build internal tools fast.

Retool is the fast way to build internal tools.

YC S24
RetroFix logo

RetroFix

Automate any workflow using plain english

RetroFix is an automation platform designed to be extremely intuitive to use, making it much easier and faster to automate manual work. To create or modify workflows you can describe them in natural language and our agent will create them end-to-end for you. We allow you to connect with 2000+ applications and use our pre-built actions for your workflows. In the case we don't have a pre-built step, our agent can instead write code to access the full APIs of all the apps we integrate with.

YC W25
Retrofit logo

Retrofit

A vintage marketplace curated by AI

Retrofit is reimagining the future of secondhand shopping. We are a new vintage marketplace that uses AI agents to curate and personalize in-demand, trending inventory. We analyze social media trends, sales data, and personal style to find the best vintage pieces that fit an individual’s unique taste, size, and budget.

YC S17
R

Rev Genomics

Rev is a biotechnology company creating better plants.

Rev Genomics is a plant biotechnology company that provides breeders, growers, and retailers with novel cultivars to differentiate themselves in high value markets.

YC S23
Revamp logo

Revamp

AI-Powered Customer Segmentation for eCommerce

Revamp helps eCommerce brands and agencies understand customer behavior by creating smarter segments for targeted email and paid acquisition campaigns.

YC S19
Revel logo

Revel

We Deserve More in Midlife

Revel offers events and online communities that nourish women at midlife and beyond. We are backed by Forerunner Ventures and Y Combinator and were recently named one of the Most Innovative Companies of 2020 by Fast Company.

YC W20
Revenir logo

Revenir

First API solution for tax returns.

Your free money back to you with the trust of your own bank. Individuals and corporations to claim back their value-added tax globally.

YC S18
RevenueCat logo

RevenueCat

A simple API for managing in-app subscriptions

RevenueCat is a mobile SDK and API for managing in-app subscriptions We take the sting out of supporting the complicated subscription systems of the App Store and Google Play Store, and help you focus on running your business.

YC S19
R

ReverCare

Concierge for elder care

ReverCare helps families select products and services that make care easier. We do this by connecting families to social workers who help them find and vet elder care solutions (estate planning software, home care, meal delivery, senior transportation, etc.). We’re able to offer social worker support at no cost. We make money through affiliate fees from products and services.

YC W18
Reverie Labs logo

Reverie Labs

Engineering next-generation, brain-penetrant cancer therapies.

Reverie Labs is engineering next-generation, brain-penetrant cancer therapies.

YC S21
Revery AI logo

Revery AI

Tiktok for fashion - where designers show their work + build traction

We are building the TikTok for fashion — a platform for creators to showcase their works, gain traction and build their brands. ### Reverie is powered by two pieces of core technology: - An AI-enhanced design tool for creators to turn their design ideas into e-commerce quality product images very efficiently. - An AI-powered Virtual Dressing Room to create professional fashion photography directly from product images. Both fashion creators and other users can easily style outfits on different models. With our core tech, we are building an active community of fashion creators (designers, stylists, influencers, bloggers, artists, casting directors, etc..) who produce original designs and engaging content around the published pieces. The social media platform will provide a streamlined path for fashion creators to experiment with their ideas and build traction. We want to eventually become the default choice for anyone who wants to launch their fashion label, and have the future Off-White, Balenciaga, Rick Oven, etc. originate from Reverie. Our team combines deep expertise in technology (AI Phds) and the fashion industry (Community builder). Our Virtual Dressing room is live with top retailers (such as Neiman Marcus) and has ~1M ARR. We are backed by YCombinator, TSVC, Cabra VC, and other amazing angels with retail experience and connections. Join us to reshape the fashion industry!

YC F24
Revi logo

Revi

AI-enabled M&A deal origination

Revi helps Investment Banks, PE firms, and Corporate Development teams source new deals. We do this by using agentic workflows to replicate their end-to-end deal origination process, entirely removing the trade-off between precision and scalability. We released the first version of Revi in September 2023 and now have companies like KPMG and platforms backed by KKR and Nordic Capital using our product.

YC S23
Revideo logo

Revideo

Create Videos with Code

We are building tools for programmatic video creation. Revideo, our open-source framework, lets you create video templates in Typescript and render them via an API. It also provides a React player component to display changes in the browser in real-time.

YC W25
Revise Robotics logo

Revise Robotics

Automating refurbishment of $1T in consumer electronics

E-waste recycling facilities spend most of their time and effort sifting through discarded electronics, searching for valuable devices, refurbishing them, and reselling them in second-hand markets. Our first product is an AI-enabled robotic system that integrates with these facilities to assess and refurbish hundreds of laptops a day without any human intervention. The system tests laptops, wipes their hard drives, photographs them, and posts them on online marketplaces for resale, regardless of model, manufacturer, or operating system.