# Vipul Ved Prakash

> Vipul Ved Prakash is a serial entrepreneur and technologist who co-founded Together AI, an AI acceleration cloud platform valued at $3.3 billion after a $305M Series B in February 2025. Previously, he built Topsy (acquired by Apple for $200M+), co-founded Cloudmark (acquired by Proofpoint), and created Vipul's Razor - one of the internet's first collaborative anti-spam systems. A self-described cypherpunk with a table-tennis past, Prakash has been dismantling bottlenecks - from spam to closed AI - for over two decades.

- **Role:** Co-Founder & CEO at Together AI
- **Organizations:** Together AI, Topsy Labs, Cloudmark, Sense/Net, Apple
- **From:** New Delhi, India
- **Nationality:** Indian-American
- **Education:** Bachelor of Science (dropped out) - Mathematics, Physics & Computer Science, St. Stephen's College, Delhi
- **Known for:** Created Vipul's Razor, one of the internet's first and most influential collaborative spam-filtering systems, Named to MIT Technology Review's Top 100 Young Innovators Under 35 in 2003 at age 25, Co-founded Cloudmark, which was later acquired by Proofpoint

## Career timeline

- **1990-1995** — Competed as a professional table tennis player, Food Corporation of India
- **1995** — Enrolled at St. Stephen's College, Delhi to study mathematics, physics, and computer science
- **1996-1998** — Co-founded Sense/Net, an internet privacy company, with Ashish Gulhati
- **1997-1999** — Engineer at Tradeindia.com
- **1998-1999** — Dropped out of college to pursue software design; wrote 'Net Zeppelin' column for PC World Magazine India
- **2000** — Co-published the Orbiten Free Software Survey - one of the first empirical models of open-source contributions
- **2000-2008** — Created Vipul's Razor, a groundbreaking collaborative open-source anti-spam system
- **2001-2002** — Engineer at Napster
- **2001** — Co-founded Cloudmark with Jordan Ritter (Napster co-founder) to commercialize Vipul's Razor
- **2003** — Named to MIT Technology Review's Top 100 Young Innovators Under 35 at age 25
- **2007** — Founded Topsy, a real-time social media search engine
- **2013** — Apple acquired Topsy for over $200M
- **2013-2018** — Senior Director of Engineering at Apple; led search technology for Spotlight and Siri; appeared at WWDC 2015 to introduce iOS Search APIs
- **2022** — Co-founded Together AI (June 11, 2022) with Ce Zhang, Chris Re, Percy Liang, and Tri Dao
- **2025** — Together AI raised $305M Series B led by General Catalyst at $3.3B valuation; company hit $100M ARR

## Achievements

- Created Vipul's Razor, one of the internet's first and most influential collaborative spam-filtering systems
- Named to MIT Technology Review's Top 100 Young Innovators Under 35 in 2003 at age 25
- Co-founded Cloudmark, which was later acquired by Proofpoint
- Founded Topsy, acquired by Apple for over $200 million in 2013
- Led search engineering at Apple for Spotlight and Siri (2013-2018)
- Co-founded Together AI, which reached $100M ARR and $3.3B valuation by 2025
- Raised $533.5M total funding for Together AI across multiple rounds
- Together AI serves clients including Salesforce, Zoom, Zomato, ElevenLabs, and Hedra
- Contributed to FlashAttention-4 and ATLAS runtime inference acceleration at Together AI
- Published the Orbiten Free Software Survey (2000), one of the first empirical studies of open-source contributions

## Latest updates

- **2026-05** — Spoke at Milken Institute Global Conference 2026 on 'AI Inside the Enterprise: Redefining Competitive Advantage'
- **2025-02** — Together AI raised $305M Series B led by General Catalyst at $3.3B valuation, hitting $100M ARR
- **2025-02** — Together AI announced FlashAttention-4 delivering faster performance on NVIDIA hardware
- **2025-02** — Together AI launched ATLAS runtime-learning accelerators achieving up to 4x faster LLM inference

## Links

- Website: https://together.ai
- LinkedIn: https://www.linkedin.com/in/vipulved
- Twitter/X: https://twitter.com/vipulved
- Instagram: https://www.instagram.com/vipul/

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Profile page: https://yespress.io/vipul-prakash
Published by YesPress — https://yespress.io
Last updated: 2026-05-20