San Francisco-based Together AI has raised $305 million in a Series B funding round, securing a $3.3 billion valuation for its AI Acceleration Cloud, revolutionizing AI infrastructure development by enhancing open-source AI models and generative AI models through its advanced inference engine to lead the industry.

This significant investment fuels the expansion of its AI Acceleration Cloud, which helps developers and enterprises train, fine-tune, and run inference for generative AI models at unmatched speed and efficiency.

Led by General Catalyst and Prosperity7 Ventures, the funding round saw participation from global investors, including Salesforce Ventures, NVIDIA, DAMAC Capital, Kleiner Perkins, March Capital, and Greycroft. These strategic partnerships reinforce Together AI’s vision of advancing open-source AI models across multiple modalities, including chat, image, audio, vision, code, and embeddings.

The company’s proprietary Inference engine, integrated with FlashAttention-3 kernels and advanced quantization techniques, delivers inference speeds two to three times faster than conventional solutions. Over 450,000 AI developers, AI-native companies, and enterprises—including Salesforce, Zoom, SK Telecom, Zomato, and The Washington Post—leverage Together AI’s platform to build modern AI applications.

Fresh Funding for Strengthening Market Position

With the new funding, Together AI aims to solidify its position as an end-to-end AI platform for enterprises. The recent acquisition of CodeSandbox will enhance built-in code interpretation capabilities, further simplifying AI development for businesses.

“Our AI Acceleration Cloud uniquely provides organizations with the performance, security and functionality required to train frontier models and build production-scale AI applications with incredible cost efficiency. This investment will accelerate our mission to make open-source AI accessible globally for AI developers and customers,” Together AI CEO Vipul Ved Prakash said.

Additionally, the company has expanded its leadership team, welcoming Kai Mak as Chief Revenue Officer (CRO) and James Zou to drive growth and innovation.

Together AI’s latest funding round marks a pivotal moment in AI infrastructure development. The company empowers businesses to integrate AI seamlessly into their operations by offering cost-efficient, high-performance AI solutions. With continuous innovation and firm investor backing, Together AI is set to revolutionize the AI cloud ecosystem.

“Recent developments in open source AI illustrate the importance of Together AI’s work in making access to models like these secure, accessible and powerful for organizations in the US and worldwide. Together AI’s ability to do this while accelerating the process, increasing efficiencies and reducing costs makes Together AI an exceptional resource for even large, global businesses,” Prosperity7 Ventures Managing Director Abhishek Shukla said.

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