Abel Mengistu is the cofounder and CEO of FlutterFlow, the low-code visual app builder that has enabled over 2 million users to create production-ready Flutter applications without deep coding expertise. A former Google senior software engineer who worked on Google Maps and ATAP hardware, he co-founded FlutterFlow in 2020 with Alex Greaves after a failed restaurant-recommendation startup taught them the real bottleneck was app development complexity. Accepted into Y Combinator's Winter 2021 batch after applying past the deadline, they famously survived 'No-sleep November' to build FlutterFlow 1.0 in a single month. The company raised a $25.5M Series A from GV (Google Ventures) in January 2024, has grown to 173 employees, and in 2025 launched Dreamflow - an AI-powered builder that generates production-ready app screens in roughly 10 seconds.
Alex Greaves is the Co-Founder and CTO of FlutterFlow, a visual low-code/AI-powered app development platform he co-founded in 2020 alongside fellow ex-Googler Abel Mengistu. Built on Google's Flutter framework, FlutterFlow has grown to serve over 2 million users across 200+ countries, backed by $25.5M in Series A funding led by GV and Gradient Ventures at a ~$170M valuation. A Stanford physics and CS grad who honed his craft on Google Maps' machine learning team, Greaves now leads a platform that lets developers and non-developers alike ship native iOS, Android, and web apps in a fraction of traditional development time.
David Hsu is the founder and CEO of Retool, a San Francisco-based developer tools company that lets engineers build internal software through a drag-and-drop interface. He founded Retool in 2017 at age 25 after pivoting from a failed fintech startup (Cashew/Oatpay) where he kept having to build internal tools from scratch. A Computer Science and Philosophy graduate from Oxford, Hsu grew Retool to $2M ARR before public launch, achieved a $3.2B valuation by 2022 with $140M in total funding from Sequoia Capital and notable angels including the Stripe founders, and now serves over 10,000 companies including Amazon, Netflix, OpenAI, and the US Army.
Webflow is a San Francisco-based SaaS platform that lets designers, marketers, and developers build production-ready websites without writing code - or with it, if they want. Founded in 2013 after three failed attempts and a near-bankruptcy, the company grew into a $4 billion business serving over 300,000 teams including The New York Times, TED, Dropbox, Dell, Discord, and Monday.com. Its visual editor outputs clean HTML, CSS, and JavaScript automatically, while its built-in CMS, hosting, ecommerce, and now AI-powered tools make it a full-stack web platform. In 2025 and 2026, Webflow pushed deeper into enterprise with a next-gen CMS, AI prompt-to-production site building, answer engine optimization (AEO), and the acquisitions of animation library GSAP and AI content platform Vidoso.ai.