Marketing Startups funded by Y Combinator (YC) 2025

Webflow is the leading no-code visual web development platform. It seamlessly generates sophisticated code so anyone can build powerful web-based businesses and adapt to changes without developers or months of building. From entrepreneurs and creative agencies to Fortune 500 companies, Webflow makes the internet a more inclusive place by making the tools to build on it more accessible to more people, fueling business growth. Webflow powers websites for innovators like Discord, Monday.com, IDEO, Orange Theory Fitness, TED, and Dropbox. Webflow is backed by Y Combinator, Accel, CapitalG, Silversmith, and other awesome investors.

TheHog.ai is the first predictive intelligence engine for growth. We don't just find leads; we predict your next customer before they enter the market. TheHog.ai maps your ICP, channels, and opportunities across the internet, monitors competitors, communities, keywords, and turns signals into ranked actionable game plans. The future of sales isn't a static dashboard; it is a living, autonomous command center. TheHog.ai gives a single operator the power of an entire sales and marketing teams by compressing weeks of research into minutes of execution. The Hog Mind & Global Graph At our core is "The Hog Mind": a proprietary Contributory Global Graph that fuses real-time social listening with advanced identity resolution. Unlike traditional enrichment tools that rely on stale databases, The Hog monitors millions of live conversations across the internet to identify high-frequency intent signals. This creates a self-reinforcing data flywheel that ranks opportunities and triggers autonomous engagement workflows instantly. What We Do: Predictive Buying Intelligence: We map the "Global Graph" of customer nodes to surface opportunities before competitors know they exist. Autonomous Engagement: An army of AI agents that don't just draft, but identify, verify, and engage with customers across LinkedIn, Reddit, and X. Deep Data Enrichment: We bridge the gap between anonymous social signals and verified contact data, creating a holistic view of your market. The Data Flywheel: A bottom-up network where every user interaction cleans and verifies our dataset, creating a defensive moat that gets smarter with every query. The Result: Win your customers before it’s even a competition

Absurd makes AI brand and performance ads at scale. Our last video for Kalshi ("Election Day") did 1M+ views, and we average 300K+ organic views across all videos. Our clients include Kalshi, Replit, Reforge, Gumloop, Micro1, and a couple YC and HF0 startups. We do this with a multi-agent orchestration layer to create production-quality videos in 72 hours. These agents collaborate with your team to plan and generate every scene on an interactive canvas. From the canvas, your team can watch image frames and video renders come to life in real time — commenting, iterating, or generating new ideas alongside the agents. Try it today at absurd.com

Claybird makes studio-quality video ads in under 72 hours for brands like Coca-Cola, Walmart, Eight Sleep, Delve, and Mercor. Claybird’s AI agents use single-image NeRFs, fine-tuned image editing models, and eval layers for picture-perfect, consistent results at scale.

Uplane replaces marketing agencies with AI. We generate hundreds of ads with matching landing pages and steer the ad spend across channels like Meta, Google, LinkedIn and others. By connecting to CRM and ERP data, Uplane learns what drives profits and continuously improves campaigns. We’ve grown from $0 to $29k MRR in only 4 months. Our largest customer recently fired their ad agency at an all-time performance high, just to work with us. Now they get 20 times as many ads per month as before. The landing pages we generate convert up to 3-times as well as the status quo. Even the best marketing managers in the world can’t beat AI at personalization and A/B testing. Digital marketing is a $740B market with a 10% CAGR. Uplane charges a base fee plus up to 10% of ad spend, outperforming marketing agencies that typically charge 10-30%.

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 with content templates, generating on brand videos on autopilot. Everything that a growth team would plan, script, produce, and edit, Bluma automates end-to-end and at scale. We can make entire UGC videos from a reference at 10x the scale and 1/10th of the cost. We remove the operations of hiring, managing, creatives and spend with AI.

Bear helps companies capture and convert the highest-intent leads on the internet - visitors clicking from ChatGPT, Perplexity, and other AI agents. Bear owns the entire funnel from agent discovery to conversion.

The problem: People are no longer searching on Google. They’re ASKING AI. If your product doesn’t appear in AI answers, you’re dead. How it works: 1. Find & analyze user questions: We find the exact questions your users ask and check how often your product is mentioned. 2. Create content: We tell you what to post, where to post, and do it for you. 3. Route to AI-optimized page: We redirect AI traffic to AI-optimized page Offer: Get your free AI visibility report → promptingcompany.com

Eden runs marketing for ecommerce brands. Our AI agents can autonomously schedule campaigns, run A/B tests, and personalize experiences across email, SMS, site display, and more, so brand founders get enterprise-level marketing without needing a team or agency. Alex and Jason have been best friends for 8+ years. They met at TJHSST, became nationally ranked debate partners, and later coworkers at Datadog. Alex led operations at an AI shopping startup, working directly with brands like TheRealReal, Poshmark, and Farfetch. Jason was at Reddit's mobile ad retargeting team and is a second-time founder, previously exiting an AI recruiting startup doing $50K MRR.

Motives is a team of AI agents that runs qualitative research projects for consumer brands: moderating and analyzing video interviews to help brands understand consumer preferences and test new ideas, in hours instead of weeks.

The AI operating system for modern brand and marketing teams that automates digital asset management and creative operations.

Make sure your brand doesn't get left behind by the paradigm shift from traditional search to generative search. AthenaHQ helps your brand get discovered on generative engines like ChatGPT, Perplexity, Claude, Gemini, and more using generative engine optimization (GEO). AI search is expected to overtake traditional search in the next 3 years. We are building AthenaHQ to fill that gap. Team of former product manager on Google Search's information acquisition team, Deepmind Generative Media team, and ChatGPT superusers.

Rankai is building an AI-powered Marketing Agency, starting with search engine marketing.

Unusual helps brands discover and change how AI models talk about them. Unusual surveys models with thousands of targeted probing questions to understand how they form their opinions. We examine the sources they pull from, and find patterns in their reasoning, that let us create content and PR engineered to change those models’ minds. A typical Unusual customer sees more than a 40% increase in traffic from AI models within a month of going live. Beyond driving more traffic, customers have used Unusual to shift models’ perception of their brand from “niche” to “enterprise-platform”, from “scrappy” to “customer-obsessed”, and from “good for startups” to “a solid bet for the middle market”. We work with top companies including Reducto, Monarch Money, and more.

We’re building the first AI-Native Compliance Firm for RIAs, wealth advisors, and fintechs. We're doing this by blending AI workflows with veteran ex-regulators so we can keep firms SEC/FINRA-ready in minutes, not days.

We build AI compliance for external marketing. For example, we work with major creators to ensure that their content meets credit card marketing guidelines.

Stormy: AI-Driven Influencer Marketing Streamline influencer outreach and let your product shine. • Discover: AI pinpoints ideal influencers with 99.8% accuracy. • Outreach: Auto-send personalized emails and follow-ups. • Close: AI negotiates and finalizes deals seamlessly. Focus on building—Stormy handles distribution on autopilot. Founders from YC have discount! Please DM me on twitter: @karmedge or email

We help businesses capture what resonates, make it repeatable, and turn attention into lasting momentum. With Typa, you can build a scalable inbound growth engine with content that compounds. We make this possible through three pillars: 1. A tone of voice that always sounds like you. Typa learns your style, cadence, and perspective so every piece of content reflects your authentic voice. 2. A knowledge base that updates in real time. Your digital clone continuously absorbs everything you say and create, ensuring your content always reflects your latest thinking. 3. A personal ghostwriter that’s always just a call away. Puff is your 24/7 AI ghostwriter and strategist, available via phone or WhatsApp whenever you want to brainstorm, plan, or execute. Currently supported channels: X, LinkedIn, Bluesky, and blog/newsletters.

Gauge helps your company show up in more AI answers. With traffic leaving search, traditional SEO is dying. Our customers are seeing inbound traffic from AI answers double every quarter.

Apten is an omni-channel AI agent that engages and nurtures leads across text, call, email, and webchat. We help enterprises in consumer services convert more leads.

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

Always-on AI agents for 1-1 personalization at scale

Recent changes in email clients made it possible to embed a whole website inside an email. We've built the first email builder that lets Shopify brands create emails that are fully interactive like websites. Zaymo emails decrease friction and increase conversion for product marketing and data collection.

At Carma, we’re revolutionizing the fleet management space by building a massively simplified experience for commercial fleet operators to receive same-day repair and maintenance for any vehicle with real-time, transparent quotes from highly-vetted service center partners with a guaranteed 24-hour turnaround. Fleet operators face the challenging task of keeping hundreds or thousands of vehicles on the road cost-efficiently with minimal downtime. Our platform solves this precise problem, powering operations for our fleet customers with every tool needed for modern fleet management - real-time service tracking, cost verification, diagnostics visibility, and so much more. We are tackling an enormous market—worth $177 billion in the United States alone. We're growing very rapidly and are looking for superstars to join us on our rocketship growth as we relentlessly work towards building a multi-billion dollar company to take over the outdated fleet management market. Join us if you're eager to make a significant impact and be part of an explosive-growth startup from the ground up.

Surface Labs helps B2B companies capture, qualify, and convert inbound leads through intelligent contact forms. We replace tools like HubSpot Forms, Zapier, and Chili Piper with a single platform that embeds on any site with one line of code. Our AI agents handle lead capture, enrichment, routing, follow-up, and CRO testing — automating what used to require full marketing ops teams. Customers see a 30% lift in conversions in under 2 weeks, and our partial response capture feature collects 50% more emails from form drop-offs.

Kite is a screen recorder that makes your demo videos look like Apple commercials in minutes. Simply record your app (works for iPhone recordings too!). Kite will track your cursor and keyboard inputs, so it can automatically zoom in on the action with professional 3D animations. Kite is as easy as Canva, but your videos will look like they came out of OpenAI or Figma. - One-click cinematic 3D animations - Display recordings on 3D mockup devices (MacBooks, iPhones etc) - Combine unlimited recordings into one video - Edit, adjust speed and trim recordings - Add text scenes and text annotations alongside recordings - AI voiceovers using state of the art text to speech models - Free music library - Brand kit–upload your logos, colors and fonts - Start from our template library or start from scratch Kite is used by hundreds of YC companies for launch videos, social media posts, landing page demos, changelog updates, feature releases and more.

Smobi is the AI-powered platform for branded, interactive business messaging, starting with RCS. We help businesses send rich, personalized messages that drive engagement, build trust, and create real conversations.

Dittofeed is an open-source alternative to platforms like Klaviyo and Customer.io. Self-host us for free, or use our low-cost cloud offering to automate messages across email, SMS, mobile push, WhatsApp, and more. We also offer solutions for embedding Dittofeed in your own SaaS! Instantly provide your customers with automated messaging tools.

1stCollab is the first influencer platform that fully automates and optimizes every aspect of your influencer marketing program. We’ve helped hundreds of startups launch their first campaigns and enabled larger brands to scale to thousands of influencers, while saving them over $1M annually in influencer spend. What we offer: - Smart search & recommendations – Instantly connect with thousands of relevant influencers. - Full campaign automation – From outreach and negotiations to contracts, payments, and taxes, we handle it all. - Real-time performance tracking – Monitor conversions, revenue, and run A/B tests with detailed reporting.

Gluetrail is a chrome extension that allows you to create support/training/marketing assets 10x faster, just from a screen and audio recording. These assets allow you to drive software or process adoption & awareness among prospects, customers or teammates. From one single recording, Gluetrail leverages your screen+clicks+audio transcript, and AI, to: - automatically create step-by-step articles with screenshots and videos - adapt the content for & publish it on 3rd party platforms in 1 click: internal or external knowledge bases (Notion, Confluence, Intercom, Zendesk...), community platforms and social media (linkedin, youtube, twitter, discourse...)

Popsy is an AI tool that finds you leads on Reddit and sends them hyper personalized DMs.

Wondercraft introduces vibe creation, creating video through natural conversation.

Banabo is the first Marketing Attribution OS with the mission of getting a company’s marketing waste to zero. We help companies achieve this goal by mapping a website visitor’s entire journey through a sale, and showcasing the true impact of each touchpoint. Accurate attribution previously wasn’t possible due to GDPR in the EU, CCPA in California, and the iOS 14 Privacy Changes. And with Google banning tracking cookies in 2023, we’ve built the first fully cookieless marketing attribution solution, using zero personal data.

Superbar is the AI-powered search and answer bar built to fix ecommerce conversion. It connects to your product catalog, blogs, videos, and customer reviews to deliver instant, high-converting search results and answers—trained specifically to sell your products. No dev work needed. Just plug it in.

Kaya is on a mission to help businesses achieve rapid growth through digital advertising. With our cutting-edge technology and experienced marketers, we deliver ad campaigns 10x cheaper, better and faster than traditional agencies. In less than a year, we’ve helped 120+ businesses achieve multiple fold growth on their ad campaigns, without the steep fees typically associated with high-quality marketing services. Check out what some of our customers have to say here: usekaya.com/reviews

Boostly provides everything necessary for restaurants to attract new guests and turn them into regulars. From AI-powered SEO, paid ads, behavioral-based text marketing with gamified engagement, and AI driven reputation management, Boostly provides 10x greater guest engagement when compared to others in the industry. Boostly’s patented processes enables them to build opted-in subscriber lists bigger and faster than anyone on the market.

Instant Labs started in 2005 by building the fastest domain search engine on the internet: https://instantdomainsearch.com. People have performed over 2.5M searches and purchased 250K domains with our free tool.

Sprites AI automates customer acquisition for entrepreneurs. Our AI agent handles managing SEO, running paid ad campaigns, content marketing, influencer outreach—tasks that normally require hiring multiple people or agencies. Entrepreneurs using our platform acquire customers much faster and scale their growth funnel without the overhead of building marketing teams or hiring expensive agencies. The result: SMBs and solo founders can now scale revenue like they have a full marketing department. We're arming entrepreneurs and small businesses globally with systematic customer acquisition run by AI- so they can focus on the important things that make their offering unique.

Loops is a simple and beautiful email sending platform for SaaS companies. We have a Notion-style block editor for email creation, excellent deliverability for transactional mail and pre-built loops for SaaS companies to snap-in to increase their revenue and user engagement.

Uberduck makes tools high-quality audiovisual content creation tools for product companies, brands, agencies, and musicians. We offer audio generation, image generation, and video generation functionality, including enterprise workflow APIs to power end-to-end video creation experiences. Vocal samples and full songs produced by our text-to-speech, text-to-singing, text-to-rapping, lyric video generation, and voice conversion technologies power: - AI remixes and original songs for musicians ranging from hobbyists to the largest DJs in the world. - Personalized musical content in marketing campaigns. - A variety of music-related consumer experiences built on top of our APIs.

AI-driven push marketing tool for mobile apps, that can be integrated in hours, without any code writing. nGrow connects to behavioral data from analytical systems like Amplitude, Google Firebase, Mixpanel etc. and allows to setup auto push campaigns with an hours. It's as simple as running Google or Facebook but in push notifications channel. nGrow.ai customers usually got their up to 30% incremental Revenue lift. We got Amplitude COO and ex-Google advisors on board

Bobidi runs Upswell, a platform that brings new guests to local restaurants and helps turn them into regulars. We transform restaurants’ promotional videos on social media into engaging quiz campaigns based on the video content. Winners receive cash rewards that can be redeemed at the restaurants.

Super Send is a powerful outreach automation platform designed to streamline and scale your prospecting efforts across multiple channels, including email, LinkedIn, and Twitter. With features like dynamic personalization, email warming, inbox rotation, and advanced analytics, Super Send enables businesses to connect with leads efficiently while maintaining a human touch. Whether you’re running A/B tests, managing campaigns, or optimizing deliverability, Super Send provides the tools you need to maximize engagement and grow your business

HOKALI is the marketplace for buying after-school programs and enrichment activities with high-quality, vetted vendors in the US. We simplify the process of booking, organizing, and managing after-school programs and camps for schools.

rehook.ai is an all-in-one promotion engine. A complete stack which lets you run referral, loyalty, rewards, discounts, coupons, leaderboards, streaks, tiers etc and is flexible, trackable, scalable and secure. With an intuitive rule engine, marketers can simply add/edit/change rules to generate coupons/rewards/cashbacks or any other incentives. rehook.ai lets you experiment and personalize campaigns around user segments, geographies, demographics, journeys and any other attribute- without ever going back to tech.

Writesonic is the GEO (Generative Engine Optimization) platform that tracks your AI visibility across ChatGPT, Gemini, and 10+ AI search platforms. Then helps you take precise actions to boost visibility—create new content, refresh existing pages, or reach out to sites that mention competitors but not you. Track, Act, and Win AI search from one platform. 15,000+ five-star reviews across G2, Trustpilot, and Capterra.

At Sentiyen, we build GPT-based AI assistants that are trained on your content and enable your audience to get the answers they need 24 hours a day. We allow creators and businesses scale themselves to unlimited 1:1 conversations with potential customers, which helps increase revenue, reduce spend, and improve customer satisfaction.

Ahazou is a SaaS app that helps offline local businesses to connect online with their customers to promote their brand, to build their reputation and to sell more. We've reached USD100k MRR with 16k+ subscribers. Our vision is to build the next all-in-one platform for 50 million local businesses to grow online in Latam. The company is founded by Rui Miadaira - 10+ years building local businesses, 3x entrepreneur, tech background with a Harvard MBA - and has built a team from iFood, Movile, PicPay. Ahazou is backed by GFC, Monashees, Y Combinator (S21) and more.

Whalesync makes data syncing easy. Our automation platform syncs data between key business tools like Webflow/Wix/WordPress and Airtable/Notion/Google Sheets. We give marketing teams two-way, real-time sync, so they can manage their website from their favorite collaboration tools. Whalesync launched during Y Combinator’s S21 cohort. Since then we’ve raised from some of the world’s top investors. We’re now trusted by hundreds of companies like [Ramp](https://ramp.com/), [Webflow](https://webflow.com/), and [Alchemy](https://www.alchemy.com/), and process millions of transactions every day. Many of our customers enjoy the product so much they [tell all their friends](https://whalesync.com/customers).

Rivia.ai empowers marketing, sales, and demand generation teams to effortlessly generate and distribute interactive product demos within 10 minutes. Potential customers of SaaS brands can now personally engage with these self-guided product stories without direct sales interactions. With our user-friendly platform and intuitive dashboards, teams can effortlessly capture, customize, enhance, and share their demos without sound technical expertise. These interactive demos can seamlessly integrate into applications, websites, email campaigns, or ad campaigns.