Messaging Startups funded by Y Combinator (YC) 2026

The world’s largest omnichannel communications platform. Bird CRM powers communication between businesses and their customers — across any channel, always with the right context, and on every corner of the planet. Its products and solutions are the foundational building blocks to business communications across preferred channels, like SMS, Voice, WhatsApp, WeChat, Messenger, Email and more. Founded in 2011, Bird connects to billions of devices and is trusted by nearly 20,000 customers worldwide. Headquartered in Amsterdam, Bird operates across nine global hubs — including Singapore, Dublin, Shanghai, Sydney, London, Bogota and Asuncion — and is proud to be a “Work Anywhere” company. Its team of 500 employees represent more than 55 nationalities.

Charm makes sending money as easy as sending email. Most people juggle multiple payment apps and scattered balances. Charm lets you pay anyone — no matter what app they use — and earns you 5% interest on your balance, automatically.

Conduit is the AI agent platform that drives conversational outcomes across support and sales. Customer conversations are the backbone of every business. Consumer businesses spend nearly a third of their working hours calling and texting customers. Conduit turns those conversations into an engine for conversions, revenue, and cost savings. We enable operators across real estate, financials, and service-based businesses, to build and deploy AI agents that perform better than your best employee. Our modular platform enables automation for the most complex, high-volume conversational workflows.

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.

Typeless is an AI messaging API designed to facilitate communication for businesses and professionals. Our API generates smart, context-aware response suggestions to enhance messaging platforms in a variety of industries, from real estate to customer support. For example, a real estate platform can use Typeless to automate responses for scheduling property viewings, answering client inquiries, and handling follow-ups. Similarly, a customer service platform can enable agents to respond faster with personalized, AI-driven suggestions for customer questions and issues. You can download our demo messaging app built with the TypeLess API on the app store: https://apps.apple.com/us/app/typeless-ai-messenger/id6478489620

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.

ChitChat by Union54 is an integrated messaging and payments platform designed specifically for Africa's unique needs. Our app combines secure instant messaging with USD card capabilities and cross-border payments, making international money movement more accessible and affordable. We're tackling one of Africa's biggest financial challenges: the high cost of sending money across borders, where African senders often pay double the fees despite sending smaller amounts. As a Y Combinator-backed startup, we're building technology that empowers African consumers and businesses to participate more fully in the global digital economy. Our mission is to create financial products that genuinely serve customer needs while challenging the status quo of traditional remittance providers.

Laylo powers drops for the world’s biggest musicians and events. The platform combines landing pages, messaging, link tracking, and more to drive sales and streams around the most important moments in entertainment.

Dumps is where friends connect through photos and chaotic messaging. Our users crave an expressive, low-stakes place to share their lives and interact.

We help companies build and scale marketing campaigns through WhatsApp, reaching their customers anywhere in the world with engaging conversations. With our platform, businesses can create and send conversations massively to users and get analytics to improve their campaign performance over time, increasing conversion in every stage of the funnel.

Courier is the fastest way for developers to build notifications for their app. Our APIs take the tedium out of integrating various notification channels, while our visual designer lets anyone design a message template and deliver their notifications to the best channel for each user with a single API call. Email, Push, In-App, Slack, SMS, you name it. Think "Stripe, for notifications."

Glowing enables leading global brands and their customers to text message with each other via existing popular mobile messaging platforms. Our solution allows for brands to appeal to millennials (and other digital travelers) as well as to the “silent guests” who prefer messaging as their primary communication channel.

PocketSuite is the all-in-one platform built for service businesses. From bookings and payments to client communication and beyond, we help owners and managers simplify their business and focus on what they do best. For more than a decade, thousands of independent professionals, small businesses, and multi-location brands have trusted PocketSuite to power their service businesses and serve hundreds of thousands of clients. We’re proud to support a diverse community of entrepreneurs at every stage of their journey. PocketSuite empowers the U.S. market of 20 million service businesses, generating $1 billion in sales with a desktop and mobile cloud solution for running their business. Thousands of businesses run on PocketSuite. Over 600,000 clients book, pay, and communicate with their service providers on PocketSuite today, and we're growing fast.

Mio powers seamless communication between Slack, Microsoft Teams & Webex Teams. The Austin, Texas-based company was founded by Tom Hadfield and James Cundle in November 2015. M.io has raised $12m from investors including Goldcrest Capital, Eniac Ventures, Two Sigma Ventures, Khosla Ventures, Y Combinator and Capital Factory. Ready to sync your teams? Learn more and get started at https://m.io/

We are the largest platform for building bots on Facebook Messenger. Bots are pieces of software that help automate communication with humans through messaging applications. Since messengers have become the most heavily used mobile apps, bots have emerged as effective instruments that are changing the world of digital marketing. Our customers use bots for sales and marketing funnel automation, lead generation and nurturing, customer support and communication. Chatfuel’s bot creators range from small and medium businesses to the world’s most recognizable brands. Some of our largest customers include Adidas, T-Mobile, TechCrunch, LEGO, Golden State Warriors, and many others.

OneSignal is the leading omnichannel customer engagement solution, powering personalized customer journeys across mobile and web push notifications, in-app messaging, SMS, and email. Our easy-to-use interface empowers content creators to focus on quality user engagement instead of complex implementation. Our powerful platform enables over a million businesses to deliver 10 billion messages daily and 1 in 7 new apps launches using OneSignal! We support companies in 140 countries, including Zynga, USA Today, Bitcoin.com, Upwork, Tribune, and many more - from startups and small businesses just getting off the ground to established companies communicating with millions of customers.

Have you ever wondered why it's so hard for physicians to communicate quickly and why the leading cause of preventable death is still a delay in communication? Our team has built the solution for this. Medigram is a team of tier 1 health system CxO IT executives, technologists, SaaS exec, physicians, engineers, and data experts. We have developed a breakthrough service for the medical industry to save lives and for hospitals to make millions per year. Medigram instantly flags insights from clinician chats for immediate insight into hospital operations and patient care. This reduces critical response times by 50%. We've designed this system to provide instant, reliable messaging (including images and audio files) across very complicated network environments in hospitals. Medigram is secure, designed for HIPAA, and a full stack system which includes database back end, middleware, logic, and client apps for iOS, Android, desktop, and the web. Our solution to this is Mobile Intelligence For Healthcare by providing a secure, intelligent workflow management platform for the patient care ecosystem and medical professionals. Within the healthcare environment, you have physicians, the patient care team, EMR, workflow, data, and administration which needs to be tied together with intelligence through Medigram.

Platform for WhatsApp API that allows you Profile leads, automate follow-ups and integrate with your favorite tools to increase conversion. Hilos allows startups and SMBs to run their entire business on WhatsApp, without code. We focus specifically on letting businesses build apps within WhatsApp that integrate with other systems (CRMs, Databases, Payment providers, etc.).

Outbound organizes the messages you send around the actions your customers take. We allow non-technical marketers and product people to set up automated email, push notification, SMS or voice messages when you need your users to take an action, then test how well each message works.

Heysan was a free mobile messaging and community based in San Francisco, California. Initially Heysan provided free messaging between phones and computers, bridging IM with SMS. The service expanded into launching a mobile community and has over 1 million users doing tens of million of monthly messages. In the summer of 2007 Heysan raised a seed round from Khosla Ventures and Atomico, the venture funds of Vinod Khosla and Niklas Zennstrom. Heysan was acquired by Good Technology in May 2009.

Acquired by Google, integrated natively into Google Maps.

FamilyLeaf is a private place to share your life with your family. You create a private page where your family can easily share photos, share life updates, store contact information, and post messages. Our mission is to bring families around the world closer together. Family is the most irreplaceable but overlooked social network; we want to help you share the little things that build a lifetime of love!

SendHub makes business communication fast, simple, and effective. Our complete online business SMS messaging solution helps thousands of companies communicate more effectively with on-the-go workforces, customers, and more. SendHub is a Y-Combinator graduate, and is backed by Menlo Ventures, Kapor Capital, 500 startups, the Seraph Group, Paul Buchheit, Eric Ries, Jawed Karim and Jeb Bush.