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Cal.com abandons open source citing AI threats, sparking community debate

By PulseAugur Editorial · [2 sources] ·

Cal.com, a scheduling tool, has moved its codebase from an AGPL license to a proprietary one, citing concerns that AI could exploit open-source vulnerabilities. The company's CEO believes AI attackers can easily access and analyze open-source code blueprints, making it a significant security risk. However, many in the developer community, including prominent figures like Linux kernel maintainer Greg Kroah-Hartman, disagree, arguing that open source remains more secure and that AI can also aid in identifying and patching vulnerabilities. AI

IMPACT Open-source projects may face increased scrutiny and potential exploitation due to AI, but the community argues AI can also enhance security.

RANK_REASON Opinion piece by a named author discussing industry trends and company decisions.

Read on The Register — AI →

AI-generated summary · Google Gemini · from 2 sources. How we write summaries →

Cal.com abandons open source citing AI threats, sparking community debate

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COVERAGE [2]

  1. The Register — AI TIER_1 English(EN) · Steven J. Vaughan-Nichols ·

    Hot take: AI's not going to kill open source code security

    <h4>Cal.com considers AGPL a license to drill, but not everyone feels that way</h4> <p><strong>Opinion</strong> Cal.com has closed its commercial codebase, abandoning years of AGPL-3.0 licensing in a move that has alarmed the developer community that helped build it and sent ripp…

  2. Mastodon — mastodon.social TIER_1 English(EN) · sjvn ·

    AI's not going to kill open source code security https:// theregister.com/2026/04/26/opi nion_column/ via @ theregister & @ sjvn Don't follow Cal's footsteps an

    AI's not going to kill open source code security https:// theregister.com/2026/04/26/opi nion_column/ via @ theregister & @ sjvn Don't follow Cal's footsteps and dump # opensource for fear that # AI will reveal security problems. It's not worth it.

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