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Daytona, an agent cloud startup building infrastructure for AI agents, achieved a $1 billion valuation backed by FirstMark and high-profile angels on October 23, 2026. The company is positioning its platform as giving every AI agent its own dedicated computing environment, similar to how individual users get their own computers. Daytona has attracted founders from major tech companies including Stripe, Perplexity, Datadog, and Mercor as angel investors, reflecting strong market enthusiasm for AI infrastructure and agent development tools.