| 01 | Slack | Workplace messaging and collaboration platform that transformed business communication. Originally built as an internal tool at Tiny Speck during development of the game Glitch, then pivoted to become the fastest-growing enterprise software company in history. | San Francisco, US | Acquired | $1.4B |
| 02 | Airtable | Low-code platform combining the simplicity of a spreadsheet with the power of a database, enabling teams to build collaborative apps and workflows without writing code, used by over 500,000 organizations. | San Francisco, US | Private | $1.4B |
| 03 | Dropbox | Cloud storage and file synchronization platform that lets users store, share, and collaborate on files across devices. | San Francisco, US | Public | $607M |
| 04 | DocuSign | Pioneer in electronic signature technology and digital agreement management. Enables businesses and individuals to sign, send, and manage documents securely in the cloud, transforming how organizations prepare, act on, and manage agreements. | San Francisco, United States | Public | $588M |
| 05 | Grammarly | AI-powered writing assistant that helps millions of people communicate more effectively. Founded by Ukrainian entrepreneurs, it provides real-time grammar, clarity, and tone suggestions across platforms. | San Francisco, United States | Private | $545M |
| 06 | Miro | Online collaborative whiteboarding platform used by over 60 million users for brainstorming, planning, and design. One of the most widely adopted visual collaboration tools in the tech industry. | San Francisco, United States | Private | $475M |
| 07 | Calendly | Calendly is a scheduling automation platform that simplifies the process of finding meeting times, eliminating the back-and-forth of scheduling emails. Used by millions of individuals, teams, and organizations worldwide. | Atlanta, United States | Private | $350M |
| 08 | Notion | All-in-one workspace that combines notes, documents, wikis, project management, and AI-powered tools used by millions of individuals and teams worldwide. | San Francisco, US | Private | $337M |
| 09 | Lattice | Lattice is a people management platform that combines performance management, employee engagement, OKRs, compensation management, and career development tools to help companies build high-performing teams. | San Francisco, United States | Private | $330M |
| 10 | monday.com | Work operating system that enables organizations to build custom work management tools and applications. Originally called dapulse, the platform serves over 200,000 organizations across 200+ countries. | Tel Aviv, Israel | Public | $234M |
| 11 | Granola | Enterprise AI meeting platform that records meeting audio locally (no bot visible in calls), transcribes conversations, generates structured notes, and makes them searchable across an organization. | London, United Kingdom | Private | $192M |
| 12 | Heron Power | Develops solid-state transformer technology for the modern electrical grid, replacing century-old transformer designs with modular, software-integrated power electronics. The flagship product, Heron Link, enables renewable energy, battery storage, and AI data center developers to connect directly to medium-voltage grids. | Scotts Valley, US | Private | $183M |
| 13 | OpenPhone | Modern business phone system that brings calling, messaging, and a lightweight CRM into one collaborative app. Serves nearly 90,000 businesses from startups to Fortune 500 companies. Y Combinator S18 batch. Rebranded to Quo in September 2025. | San Francisco, United States | Private | $161M |
| 14 | Zoom | Video communications platform providing cloud-native video meetings, team chat, VoIP phone, webinars, and virtual events, becoming a household name during the COVID-19 pandemic with hundreds of millions of daily meeting participants. | San Jose, US | Public | $157M |
| 15 | Linear | Project management and issue tracking software designed for modern software teams, built by former Airbnb, Coinbase, and Uber engineers with a focus on speed, craft, and streamlined user experience, used by over 15,000 companies including OpenAI, Scale AI, and Perplexity | San Francisco, United States | Private | $134M |
| 16 | Attio | AI-native CRM platform that combines a flexible data model with real-time relationship intelligence, enabling modern go-to-market teams to build customized workflows and manage complex customer relationships at scale. Serves 5,000+ paying customers including Lovable, Granola, Modal, and Replicate. | London, United Kingdom | Private | $116M |
| 17 | Warp | AI-powered terminal emulator built in Rust, combining a modern developer experience with agentic AI capabilities for command suggestions, code generation, and team collaboration across macOS, Windows, and Linux. | New York, United States | Private | $73M |
| 18 | Gumloop | No-code AI automation platform that enables non-technical employees to build and deploy AI agents using a drag-and-drop visual interface, used by Shopify, Ramp, Gusto, and Instacart | San Francisco, United States | Private | $70M |
| 19 | Beautiful.ai | AI-powered presentation software that takes users from initial prompt to finished presentation in minutes. Over 100 million slides created by users across 193 countries, with context-aware AI workflow and multilingual support. | San Francisco, United States | Private | $45M |
| 20 | Zed Industries | High-performance, open-source code editor built from scratch in Rust with GPU-accelerated rendering, designed for real-time collaboration between developers and AI agents. Created by the team behind GitHub's Atom editor and the Electron framework. | San Francisco, United States | Private | $45M |
| 21 | Highlight AI | Intelligent OS for teams and AI agents. Builds infrastructure to securely capture, model, and retrieve team context in real time. Combines user-controlled capture with unified team memory engine and proactive command center. | San Francisco, United States | Private | $40M |
| 22 | Cal.com | Open-source scheduling infrastructure platform and Calendly alternative that enables developers and businesses to embed customizable booking experiences, with both self-hosted and cloud-hosted options. Serves 20,000+ customers. | San Francisco, United States | Private | $32M |
| 23 | Copy.ai | AI-powered go-to-market platform that automates sales and marketing workflows, enabling teams to generate content, streamline prospecting, and optimize revenue operations using generative AI. Acquired by Fullcast in October 2025. | Memphis, United States | Acquired | $14M |
| 24 | Littlebird | AI-powered personal recall assistant that captures and retrieves on-screen content. Helps users find and resurface information they've previously seen across their digital workspace. | San Francisco, United States | Private | $11M |
| 25 | Tiptap | Suite of open-source content editing and real-time collaboration tools for developers. Built on ProseMirror, provides a headless, extensible rich text editor framework used by LinkedIn, GitLab, Axios, Substack, and Anthropic, with over 3 million npm downloads per month. Y Combinator S23. | Berlin, Germany | Private | $3M |