Top Open Source Startups in 2026

Firecrawl is the easiest way to turn the web into data AI agents can use. One API call converts any URL into clean, LLM-ready markdown or structured data - the boring-hard problem everyone building with LLMs eventually hits, solved. We hit 8 figures in ARR in year one and more than doubled it in year two. We have 150k+ GitHub stars, and developers, agents, and category-defining AI companies build on us every day. Growth like this is rare, and we're just getting started. We're a small team punching far above our weight. Everyone here owns a real piece of the product and company, end to end, and runs it themselves - no hiding behind process or headcount. This is a place for people who want to work at the frontier: an AI company building the infrastructure other AI companies run on, not one bolting AI onto an existing product. We move fast, go deep, and are building the tools superintelligence will rely on to gather data from the web.

At Provable, you’ll join an elite team building infrastructure, products, and services for the Aleo ecosystem and other ZK technologies. We’ve published landmark papers such as Zexe (eprint.iacr.org/2018/962) and Leo (eprint.iacr.org/2021/651). We hope to create a safer, decentralized world with advanced privacy technology.

Flagsmith lets you manage feature flags and remote config across web, mobile and server side applications. Deliver true Continuous Integration. Get builds out faster. Control who has access to new features. We're Open Source!

Akeneo is the CRM for product data that marketers love! Nowadays, marketers have to deal with an increasing number of sales channels. They need flawless product data to provide an uniform customer experience across all those channels. But they are struggling with archaic and ineffective tools. Akeneo help thousand of manufacturers and retailers across the globe to maintain their competitive advantage by establishing one single source of truth for product information. More productivity, faster offering expansion and accelerated time-to-market, Akeneo PIM is an intuitive and open source software that brings instant results. Our enterprise platform is the most agile and scalable in the market.

We are a nonprofit organization that hosts Wikipedia and our other free knowledge projects. We keep Wikipedia and Wikimedia sites fast, reliable, and available to all. We protect the values and policies that allow free knowledge to thrive. We build new features and tools to make it easy to read, edit, and share from the Wikimedia sites. Above all, we support the communities of volunteers around the world who edit, improve, and add knowledge across Wikimedia projects. Our media platform has more than 53 million unique files, and more than 1 billion unique devices visit our platforms each and every month.

Institute of Free Technology provides the Technical, Financial, Legal, People Operations, Branding & awareness services to a wide portfolio of open source projects. Currently our growing portfolio includes Status, Logos, Codex, Waku, Nimbus, Nomos, Keycard. More about each project, here: free.technology As a team, IFT is completely distributed since inception. Our team is currently 200+ core contributors strong, and welcomes a growing number of community members from all walks of life, scattered all around the globe. We care deeply about open source, and our organizational structure has minimal hierarchy and no fixed work hours. We believe in working with a high degree of autonomy while supporting the organization's priorities.

Instill AI is on a mission to make AI highly accessible to everyone. We build tools to streamline the process of distilling the value of unstructured visual data across all stakeholders in the modern data stack, to ultimately benefit all size organisations.

Open source platform for developers that allows developers to write business logic for applications and avoid writing code for managing the state of the application.

At Cloudera, we believe that data can make what is impossible today, possible tomorrow. We empower people to transform complex data into clear and actionable insights. Cloudera delivers an enterprise data cloud for any data, anywhere, from the Edge to AI. Powered by the relentless innovation of the open source community, Cloudera advances digital transformation for the world’s largest enterprises. Learn more at cloudera.com.

Every day, our team of more than 100 digital strategists, architects, designers and creators across the country help leading nonprofit organizations and government agencies make an impact and extend their influence. To keep up with the fast pace of technical change over the last few decades, we've had to innovate, over and over again. But one thing has never changed – our singular focus on impact.