This week in COSS: Mistral raised $830 million in debt financing for AI data center expansion, OpenAI acquired Promptfoo signaling a growing focus on AI security, and Cal.com made waves by going closed source in a move that sparked debate about the future of open source software security. Self-hosted AI automation stacks featuring n8n, Dify, and Ollama are gaining traction, while PrestaShop announced a formal collective restructuring process and Starburst unveiled an AI-powered front end aimed at replacing conventional BI dashboards. We also feature the following companies in Cossmology: ACI.dev, Beanbag, Builderz, Cachix, Code Machine, DataChain, Flox, HTTPie, Manticore Software, and Redgate Software.

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