Customer Success Startups funded by Y Combinator (YC) 2026

Most B2B churn is preventable - most teams just see it too late. By the time a CSM notices, the champion has already quietly disengaged, key features went unadopted, and the renewal conversation is damage control. The dangerous part? The customer might still be logging in, but they've stopped using what actually matters. Userlens catches all of that months earlier. Our AI agents monitor every user at every account the way your best CSM watches your top five strategic accounts: - feature adoption - usage trends - champion engagement - sentiment shifts in Slack and Intercom - open support issues. When a signal hits (churn risk, renewal, expansion opportunity), Userlens doesn't just alert you. It builds the talking points and deck on top of your team's approved templates and playbook. If you have CSMs, Userlens makes every one of them your best. If you don't have one yet, Userlens runs your book like the best CSM money could buy.

Every product ever sold needs support at some point. That support falls into one of two buckets. Bucket 1: Simple stuff. T-shirts, screen protectors, keyboards. You buy it, it shows up, maybe you ask “where's my order?” once. This is solved. Zendesk and a hundred other horizontal companies solved it. Bucket 2: Hard stuff. $20,000 industrial heaters. HVAC systems. CNC machines. Car parts. Products where buying wrong means your building doesn't have heat or your manufacturing line is down. Support for these products can only be performed by highly trained domain specialists and there aren't enough of them. If you're selling EV charging stations, your support person needs to be a certified electrician who understands local power grids, installation codes, and compatibility matrices. You can't hire this off the street. You can't outsource it overseas. You'd think LLMs would have solved this by now. They haven't. Three years into the LLM era, penetration in this industry is very low & the reason is twofold. First, off-the-shelf models don't actually understand these products. The knowledge lives in 48-page technical manuals buried on some manufacturer's website in terrible formatting — wiring schematics, compatibility matrices, installation diagrams that can only make sense visually. A general-purpose LLM can't draw you the diagram showing how to connect terminal A to terminal B. It doesn't have the spatial understanding or the product-specific reasoning to be a real technical advisor. So companies still rely entirely on human experts. Second, even if the models were good enough, there are no harnesses to make them useful in the business. No engine to capture deep technical knowledge about complex physical products and keep it updated. No way for a company to offload tribal knowledge from their senior technicians into a system. No way to see what questions customers are actually asking and feed that back into the knowledge base. No generative multimodal presentation and no expressive voice support. Prox is building the best technical product expert for extremely complicated physical products. A multimodal agent that can draw wiring schemes, share CAD models, process incoming videos from a technician in the field, and support people over the phone with voice that can pass the Turing test. To get there, we're solving multimodal knowledge graph building at a very deep level. A huge portion of your work will be developing SOTA knowledge engines that can truly understand complex physical products.

We unify your contracts, service consumption, and customer relationship context so that your revenue, success and sales teams can operate from the same ground truth. With everything centralized, you can proactively react to customer signals for upsell and churn while billing is seamlessly handled in the background.

AI notetakers clutter meetings. Multiple tabs separate knowledge. Lyra brings meetings and work together in one clean workspace. You can work on docs with AI and your team live, no screenshare required. Create follow-ups and action items as you talk. Ask your meeting questions after the call. Access auto-transcribed calls and instant summaries. Everything stays in one place with full context across every meeting.

Rulebase builds AI coworkers that help banks and fintechs review 100% of customer interactions in real time. Our agents flag compliance breaches, high-risk issues, and quality gaps across calls, chats, and emails — then route them to the right teammates. The result: up to 30% fewer escalations and QA cycles reduced from hours to minutes.

Consumer enterprises have millions of customer support tickets annually. They need to constantly evaluate support agents’ performance and compliance. Typically they evaluate less than 5% of those interactions manually which is slow, expensive and not scalable. Intryc's AI can evaluate 100% of all customer interactions, in real time, at half the cost.

The AI-native Customer Intelligence Platform purpose built for post sales teams. Wavelength brings your entire customer data stack into one place - with powerful AI agents that uncover important signals and act instantly

Clueso is the fastest and easiest way for companies to generate high-quality instructional videos and documentation, ideal for customer education/onboarding and employee training. Our AI transforms simple screen-recordings into studio-quality videos and step-by-step documentation in minutes.

Pylon is the modern alternative to Zendesk, Intercom, Freshdesk, and Salesforce Service Cloud. We help B2B companies track customer support issues across common B2B channels including shared Slack channels (Slack Connect), Microsoft Teams, email, in-app chat, ticket forms, Slack community, and more. Hundreds of fast-growing YC companies of all sizes like Vellum, Hightouch, and Deel are customers. Learn more at usepylon.com

Berry offers an AI CSM that scales customer success for SaaS companies. Every post-sales organization faces the challenge of scaling customer success without having to hire more. Berry combines the best of the two worlds - taking the white-glove onboarding experience and offering it at scale. Our AI CSM onboards, trains and grows accounts for you non-stop. It’s a 10x hire to your team - at a fraction of the cost.

Frigade AI is an in-app assistant that intelligently guides and onboards your users through your product. Our agent learns your product's interface, gives contextual guidance that adapts to each user, and takes actions directly on your users' behalf. Learn more at Frigade.com

Founded in Vancouver, British Columbia, Ariglad The first AI platform that integrates with support channels and release notes to auto-maintain your knowledge base. Ariglad suggests new articles, updates existing ones, detects duplicates, and merges them. Basically, it puts your knowledge base maintenance on auto-pilot. This is led by Co-Founders Sophie and Ali. They are both completely obsessed with this problem and their customers, who have partnered with Ariglad to become immensely more efficient.

We help onboarding, implementation and professional services teams at B2B companies onboard customers faster, more consistently and more efficiently with AI agents.

Atlas is a modern, all-in-one customer support platform that is built with AI first. We help you solve your customers problems faster by understanding them more completely with a suite of customer tools like session recording, bug tracking, and event feeds. You can think of us as the next generation Zendesk / Intercom combined with Log Rocket and Linear. Learn More: https://atlas.so/ Products: - Chat Widget - Ticketing - Omni channel Support (chat, email, WhatsApp, Slack Connect, and SMS) - Customer Timeline - Session Recording - Help Center - AI Chatbot - Customer Insights

Onboard is a SaaS which automates & streamlines the customer onboarding & implementation process. Easily create dynamic launch plans (customized per customer), which are collaborative with clients and visible to all stakeholders. Onboard is built for onboarding by a team that spent a better part of the last decade onboarding some of the worlds largest brands.

FlowEQ is the trusted provider of workflow automation for teams that need to accelerate their work, especially complex processes and high-volume workflows that require human judgment. The FlowEQ Workflow Acceleration Platform includes interactive decision trees that are used by customer support, operations and product teams across all industries to improve accuracy and speed up important recurring work. Using FlowEQ customers get through high-stake recurring workflows 10x faster, saving their companies time and money every day. For additional information, visit www.floweq.com.

Beau helps to work with people outside your company: build, visualize, and automate your customer-facing processes! 🔥 All with one, easy-to-use solution: collect forms, accept payments, keep updated, request details, and approve steps!

Chatwoot is an AI-powered customer support platform that enables businesses to deliver exceptional support experiences. Built as a modern, open-source, and self-hosted alternative to tools like Intercom and Zendesk, Chatwoot brings all your customer conversations into one place. You can connect email, website live chat, social media accounts, WhatsApp, and more, making it easy to manage every interaction from a single, unified platform.

WorkRamp is the All-in-One Learning Platform that your executives, employees, and customers will love. WorkRamp advances learning as a growth engine for your business with a flexible platform that empowers teams to develop top talent, exceed revenue targets, and inspire customers to become advocates. With a flexible, All-in-One Learning Platform, WorkRamp redefines the LMS for the modern workplace to help executives recognize learning as a growth engine and one of the most strategic investments an organization can make. See why top learning teams at Box, Outreach, and Reddit trust WorkRamp to drive business outcomes and organizational scale.

Natero helps Customer Success Managers reduce churn, increase expansion, and manage more accounts with less effort. Natero is the only Customer Success solution to combine predictive analytics, customer intelligence, and workflow management in a unified platform. This next generation solution helps B2B software providers prioritize, automate, and scale their Customer Success processes.