Marketing Startups funded by Y Combinator (YC) 2026

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.

tday automatically turns a software company's product into on-brand marketing creative. Connect your product and git repo, and tday generates polished launch videos, social graphics, and ads, the content a team would normally spend hours making in a design tool or pay a freelancer for. tday then publishes the creative and measures how it performs across your social and ad channels, closing the loop from what you ship to what you post.

Memoir turns what your team ships into marketing material. It connects to GitHub, Linear, Slack, customer feedback, and product analytics to understand what changed, why it matters, who should hear about it, and how to tell the story. From there, Memoir creates multi-touchpoint marketing across social, blogs, changelogs, demo videos, customer updates, and launch content, all in your company’s voice. It also watches what is getting traction in your market, learns from your edits and campaign performance, and gets better every time you ship. It is not a generic AI content tool. Memoir is a marketer with the soul of an engineer: it starts from the product source of truth and turns product velocity into market velocity.

CharacterQuilt builds computer use agents to deploy enterprise marketing campaigns. Marketers today don’t actually do much marketing at all. Today, over 80% of time spent on launching a marketing campaign is actually ops work: tweaking automation flows in Pardot, configuring audiences in LinkedIn, or wiring HTML emails in Marketo. What’s crazy about enterprise marketing is companies pay agencies millions of dollars just to deploy campaigns in their systems — and they still have to wait weeks for each one. CharacterQuilt is AI infrastructure for marketing teams: a brain that learns your brand, and agents that operate your existing tools. Marketing campaigns that used to take 3 agencies, 10 tools, and 6 weeks are now being built, designed, and deployed from CQ in an hour. Customers submit a brief like they would send to a human teammate or marketing agency, and they get back fully designed and deployed campaigns. Teams like 1upHealth, ABC Fitness, and Emplifi use us to: 1-) Build segments/audiences faster 2-) Create on-brand creative (AI is terrible at staying on-brand) 3-) Deploy campaigns automatically into HubSpot, WordPress, LinkedIn etc. We replicate your brand guidelines, deeply understand past campaigns, and work inside your systems. If you run demand gen or lifecycle at a B2B/B2C company and want to ship campaigns faster, send us a brief and we’ll build it in 15 minutes.

InstaAgent helps consumer brands scale a single campaign across hundreds of specific audiences on Meta and TikTok, each with its own content, voice, and targeting. Traction: $1M Ann. Run Rate in 10 months, and doubled to $2M in 4 months during YC. From one brief, we create personalized creatives, distribute them through paid channels and niche social accounts, and use performance data to learn what works, scale winners, and improve every campaign.

Pavoot is an AI event manager for companies that run in-person customer events. More and more companies are investing in dinners, summits, and community events because relationships drive revenue. But today, running events means sourcing attendees, sending invitations, hosting the event, and then manually digging through notes, emails, and spreadsheets afterward to figure out who attended, what was discussed, who is a strong lead, and who should be followed up with. Most teams either send generic "thanks for coming" emails or never properly capture the value created during the event. Pavoot replaces this fragmented workflow with a single AI system that keeps every attendee, interaction, conversation, and follow-up connected in one place, making relationship-driven growth scalable. Gohar and Ana met while studying Computer Science at ETH Zurich. Gohar is a six-time Swiss chess champion and was the youngest member of Switzerland’s national chess team at age 13. Ana won more than 20 medals in scientific Olympiads, ranked 1st in CS at Latin America’s most competitive university, and built internal AI systems used by hundreds of data scientists at some of the largest banks in Latin America before moving to ETH Zurich for AI research. === Book a demo: pavoot.com

Archer is the agentic commerce platform for customer acquisition and retention. We help companies deploy AI agents that can automatically purchase, personalize, and deliver physical gifts on behalf of their business. Instead of manually coordinating rewards, swag, meals, experiences, and gifts, companies can give agents budgets, goals, and instructions, allowing them to take action automatically when important business events occur. Today, businesses use Archer to automate corporate gifting across outbound sales, customer onboarding, referrals, partnerships, customer success, and employee milestones. A prospect books a meeting. A customer completes onboarding. A partner generates a referral. An agent understands the context, selects an appropriate gift, purchases it, and handles fulfillment automatically. What makes Archer different is that companies no longer need to manage gifting campaigns manually. Agents continuously monitor what is happening across a business and execute personalized physical experiences at the right moment for the right person. We believe corporate gifting is just the beginning. As AI agents become increasingly capable of understanding business context through CRMs, product data, Slack, Linear, Notion, and other systems, they will become active participants in how companies build relationships, acquire customers, retain users, and grow revenue. For decades, businesses have relied on software to track relationships. We believe the next generation of businesses will rely on AI agents to strengthen them.

Revnu is your AI growth team. Built to run your whole GTM while you focus on building, Revnu is the best way to grow with AI. Our agents run every growth channel: outbound, ads, SEO, social, etc all on one shared intelligence, so learnings from one channel automatically improve all the others. You keep shipping. We run the business.

Kuli is an AI coworker for marketing teams at the world's largest consumer brands. Our agent watches all videos across social media, learns the brand's context and helps them turn signals from billions of social videos into winning campaigns without increasing headcount. Previous platforms gave marketers databases to search through and a CRM. Kuli actually watches the content. Marketers at team like Disney, Nivea and PostHog use it to scout creators, run analysis on trends and competitor strategies, and analyse what makes their campaign perform better. For 10 years, influencer marketing meant more tools, more tabs, more spreadsheets. Kuli replaces all of that with one single agent you orchestrate. One marketer with Kuli does what a $50K/month agency bills for manual tasks.

Manicule does AgentRel. We get companies discovered and used by AI agents. Think DevRel, rebuilt for a world where agents make all the decisions. We own developer documentation and technical content across social channels, end-to-end. We've grown 100% MoM over the last three months to $53K in monthly revenue, with customers like Supermemory, Greptile, Reducto, and Mastra. Getting discovered and used by agents is its own job now, and the market for it is broken. The SEO/GEO SaaS tools just show you data like where you rank in AI answers. The agencies are slow and lack know-how with agents. The one person who could own all of it end-to-end, a DevRel, is nearly impossible to hire: our customers have had roles open for months at $300K+ and still can't find anyone good. We solve all these gaps. Naman has been doing fractional DevRel since he was 13, working with companies like PromptLayer, Brightdata, and Courier.com. Shreyans has been building since 14 — he built an AI app that hit App Store Productivity Trending within a month, and was the founding engineer at Supermemory. We met in high school and have built multiple startups together since.

Sitefire (YC W26) helps brands market their products to agents. They create content and tools that get their products discovered and used by AI agents (ChatGPT, OpenClaw). Sitefire identifies which content drives AI visibility, and automatically creates it. The teams using Sitefire execute on-page and off-page actions to deliver measurable top-line growth.

Bizzy handles your calls, captures and qualifies leads, and books appointments directly into your CRM. It understands your services better than a receptionist would, routes and escalates calls, and syncs with your existing tools to incorporate complex workflows, all so your team can focus on servicing leads, not qualifying them.

One API to search, enrich, and monitor the web. An agent is only as good as the data it runs on. Most agents and GTM tools today are stuck pulling stale, fragmented data from a dozen different providers, which caps how good their output can ever be. We unify all of it behind one API. One credit-based API covers people data, company data, web search, deep research, news, social signals, and web scraping. Multi-provider waterfall logic routes each call to the best source and falls back automatically, so you get one integration and one bill instead of stitching together Clay, Apollo, Exa, Tavily, and a handful of others. We're building the data layer that agents and GTM teams plug into to find, understand, and reach their customers.

Lapis gives businesses the ability to run end-end ads on AI platforms, starting with ChatGPT Ads. With Lapis, businesses can rapidly iterate on ad copies and A/B test at scale without being bottlenecked by design and creative capacity. Lapis can also be used on traditional ad platforms like Google and Meta, where marketers can use Lapis to generate ad creatives, headlines, and get feedback on what ads actually work. Lapis is used by 1,000+ marketing teams, from big businesses like Hyundai and Tata to small businesses around the world, and supports 15+ languages including English, Spanish, and Italian.

Absurd makes AI brand and performance ads at scale. Our last video for Kalshi ("Election Day") did 1M+ views, and our videos average 400K+ organic views. Companies like Hims, Kalshi, Replit, and Brex use Absurd to create production-quality videos in 72 hours. Try it at absurd.com

Narrative automates the creation and distribution of high-quality sports highlight videos for broadcasters, teams, and leagues.

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. Companies waste billions on bad ads, mismatched landing pages, and poor budget allocation. Uplane fixes this by replacing a patchwork of agencies, spreadsheets, and siloed tools with one self-improving system. The result: Higher ROAS for enterprises and effortless, expert-level marketing for SMBs.

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.

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

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.

Using our 6+ years of influencer marketing experience to help companies run their influencer campaigns at scale. Fully managed solution to drive real, attributable results to their marketing efforts.

Make sure your brand doesn’t get left behind as search shifts from traditional SEO to generative AI search. AthenaHQ is an AI SEO platform for GEO (Generative Engine Optimization) and AEO (Answer Engine Optimization), helping brands show up in AI-generated answers across ChatGPT, Perplexity, Claude, Gemini, and more. AI search is expected to overtake traditional search within the next few years. AthenaHQ fills the gap with a system to measure visibility, identify what AI engines cite and recommend, and help your team improve content and brand presence for AI-first discovery. Team of former product manager on Google Search's information acquisition team, Deepmind Generative Media team, and ChatGPT superusers.

SEO & GEO is confusing and massively overpriced. RankAI will handle everything autonomously to drive you millions of visitors from Google and AI search like ChatGPT. RankAI first identifies search queries your customers already search for, then it builds search-optimized pages to capture millions of these queries. Finally, like a real agency, RankAI will track its results, rethink its strategy, and rewrite pages again and again to improve performance. RankAI does not stop until traffic swarms in.

AI agents are the newest audience brands need to speak to, but go-to-market teams don't have the tools to understand how they form opinions or make decisions. Unusual helps brands in the Fortune 100 and scale-ups like Change.org and Astronomer drive more sales and win more market share by shifting how AI models perceive their offerings. We work closely with every brand to (1) identify the root cause of AI misperception, (2) align on marketing, sales, and product strategies that appeal to agents, and (3) build infrastructure and content that makes their strongest proof more legible to agents. Our methodology centers on applying black-box interpretability techniques to AI agents like ChatGPT and Claude to understand how they form opinions about a brand and its competitors. Seeing the *why* behind each opinion gives us the ability to create targeted interventions that change them.

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. There’s a wealth of data distributed across GA4, GSC, keywords, prompts, ads, and more. This data is incredibly rich, but fragmented and complicated to understand. Gauge unifies all of these data sources into a single agent that can do the work of an entire marketing team.

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.

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.

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.

B2B advertising is broken: poor targeting, wasted ad spend, bot traffic, and 3rd party-cookies. Vector helps marketers drive pipeline with contact-level targeting and revealing who's seeing your ads (even if they never convert).

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...)

Syncly co-founders (former founders of Sualab, a video AI startup, $200M exit) are building agentic AI to automate video marketing for the world’s largest CPG brands (Tiffany, Clorox), a market where brands spend hundreds of billions on agencies today. At $2M ARR, grown 2x in 6 months, 4x in 12 months, and 120% NDR. Backed by YC, SoftBank, and John Kim (Sendbird CEO).

Goose is an AI creative engine that turns your brand into a continuous stream of on-brand video ads. We index your existing materials — videos, product shots, testimonials, ad performance data — into a context layer, then generate short-form creative for Meta and TikTok at the volume performance marketing actually requires. The engine compounds: the agent learns from ad performance, competitors, trends, and human feedback, so your creative gets better every month. Run as a human-guided, done-for-you service.

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 instantly answers questions on your website and drives conversions 24/7.
It's like having a top salesperson on every page.

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 and demand generation for entrepreneurs and growth teams. Our AI agent handles managing paid ad campaigns on Meta, Google, LinkedIn, Reddit, TikTok, and runs your SEO and AEO gameplan with a content engine —unlocking growth channels that normally require hiring multiple people or agencies. Teams using our platform acquire customers much faster and scale their growth funnel without the overhead of hiring large teams of specialists or hiring expensive agencies. The result: heads of marketing, SMBs, and founders can now scale revenue like they have a full marketing department. We're arming businesses with systematic customer acquisition run by AI- so they can focus on the important things that make their offering unique.

Reforged Labs Boa is the AI creative intelligence agent that answers all your questions about what ads are performing, why they work, and what to create next.

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.