Compare OpenAI Codex vs. Vellum in 2026

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Description

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Description

Vellum is an intelligent personal assistant platform that automates daily tasks and enhances productivity across multiple devices and applications. It enables users to create a unified assistant that works across web apps, macOS, iOS, and command-line interfaces. The platform can manage tasks such as cleaning inboxes, summarizing conversations, scheduling events, and handling communications. Vellum assistants are designed with persistent memory, allowing them to learn user preferences, routines, and working styles over time. This memory system helps deliver more personalized and context-aware assistance. The platform integrates with tools like Slack, email, Telegram, and other communication channels for seamless workflow management. Vellum also supports task automation such as app development, meeting coordination, and real-time updates. It prioritizes security by storing credentials in secure environments like local keychains or isolated vaults. Users maintain full control over permissions and how much autonomy their assistant has. The system ensures that personal data is not used as training data, preserving user privacy. Vellum helps users save time and focus on high-value activities by automating routine processes.