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simstudioai
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Sim is a Y Combinator–backed open-source AI company founded in 2025 by UC Berkeley alumni Emir Karabeg and Waleed Latif. Karabeg previously built WorkNinja, an LLM-powered learning platform that reached 300,000 monthly active users, while Latif engineered core backend infrastructure at Amazon's Ring division, handling over one million transactions per second.
Tools
Sim(github.com/simstudioai/sim)
Open-source platform for building AI agent workflows on a visual canvas, connecting 1,000+ integrations and LLMs.