Endex AI, a startup founded by Tarun Amasa and Pratham S., has raised $14 million in a funding round led by the OpenAI Startup Fund. The company is set to introduce a groundbreaking AI agent built directly into Microsoft Excel, aiming to revolutionize how analytical work is performed in one of the most widely used enterprise tools.
This innovative agent is designed to streamline and automate complex analytical tasks within Excel, a platform central to financial modeling, data analysis, and broader business operations. Touted as the first autonomous AI agent of its kind to be embedded natively in Excel, Endex’s product addresses a longstanding gap in how large language models (LLMs) support extended, tool-based workflows.
Tarun Amasa shared insights into the development journey on X, noting the team had spent the past year at OpenAI’s headquarters in San Francisco. There, they refined the agent using internal model checkpoints and tackled key challenges in analytical task automation. “We felt that tool use across long horizons was severely limiting the capacity of LLMs from impacting all forms of analytical work,” Amasa explained.
Motivated by this limitation, the team focused on enhancing the model’s long-context reasoning and enabling more effective tool use. The result is an agent capable of executing analytical tasks that span several hours, delivering coherent and context-aware outputs—an area where many existing LLM-based tools struggle.
This investment continues the OpenAI Startup Fund’s strategy of backing startups developing vertical-specific AI agents. Previous investments include companies like Ambience Healthcare and Anysphere, which are also building domain-focused solutions.
Currently, Endex AI’s Excel-native agent is available on an invite-only basis, with a gradual public rollout in the pipeline. Interested users can join the waitlist to gain early access.
With this funding and support from OpenAI, Endex AI is positioned to make significant strides in transforming enterprise workflows by embedding powerful, autonomous intelligence directly into a tool used daily by millions of professionals.
