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§ Private Profile
personal journaling app helping users capture and organize daily thoughts and memories, focused on digital journaling and personal productivity.
Key people at Day One.
Day One is a personal journaling application that provides users with a secure digital platform to capture and organize their daily thoughts, experiences, and memories across multiple devices. The software features end-to-end encryption, Markdown editing capabilities, cross-device data syncing, daily reminder functionality, and automatic metadata tagging for location, weather, date, and time. Operating across the iOS, macOS, Android, and Windows operating systems, the application currently serves millions of active users globally. On June 14, 2021, the company was acquired by Automattic, the parent organization of WordPress.com, and it has recently collaborated with Apple to integrate artificial intelligence and a Suggestions API into its broader journaling ecosystem. The platform has been widely reviewed and analyzed by major technology publications, including Macworld and The Verge. Day One was originally established in an undisclosed year by founder Paul Mayne.
Key people at Day One.
# Day One: Multiple Companies, One Name
The search results reveal that "Day One" is not a single company but rather a name shared by at least four distinct organizations operating in different sectors and geographies. This disambiguation is essential before providing a focused analysis.
DayOne Capital (Central Eastern Europe focus)[1] is an early-stage technology investor managing its 3rd fund since 2024, investing EUR 300k to EUR 2 million in Pre-seed and Seed stage ventures across the CEE region. Its mission centers on backing technology-driven founders with entrepreneurial and investor experience to help them scale globally.
DayOne (Singapore-based data center operator)[2] is a global digital infrastructure pioneer that officially launched as an independent entity on January 1, 2025, following its separation from GDS International. Founded in 2022 and headquartered in Singapore, it secured approximately USD $1.9 billion through Series A and B funding rounds backed by SoftBank Vision Fund, Citadel's Kenneth Griffin, Coatue Management, and Baupost Group. The company operates next-generation data centers across Asia-Pacific and beyond, serving hyperscalers and large enterprises.
DayOne (Basel, Switzerland)[3] is a healthtech accelerator program backed by Basel-Stadt Kanton that focuses on digital health, medtech, and techbio startups from Pre-Seed to Series A stage. It operates as a facilitator connecting investors and pharmaceutical industry partners with curated high-potential startups, taking no equity during the acceleration process.
Dayone Capital (Beijing-based)[4] is a Chinese investment firm founded in 2020 that focuses on consumer, leisure, technology, sports, healthcare, and energy sectors, having closed its first USD fund in August 2021 with $630 million in assets.
Day One Ventures[5] is a venture capital firm located in San Francisco, founded in 2018.
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