Day One

What Day One does

Day One is a cross-platform personal journaling application founded in 2011 by Paul Mayne and Eric Cohen (originally as Bloom Built LLC) and now operated as a wholly-owned subsidiary of Automattic Inc. The product targets individual consumers seeking structured, private, long-term journaling, with supporting use cases in mental health and wellness, memory preservation, travel documentation, and fitness logging. Its core architecture consists of native apps for iOS, Android, macOS, Windows, Apple Watch, browser extensions, and a web version (dayone.me), unified by the proprietary Day One Sync cloud infrastructure, which was introduced in 2015 and now ships with end-to-end private-key encryption that has been audited by nVisium. Notable product capabilities include multi-format entries (text, photos, video, audio, drawing, location), an On This Day memory recall feature, calendar view, multiple journal support, templates, Apple HealthKit Mindful Minutes integration, shared journals, and a book printing service.

The company operates a freemium, product-led distribution model, acquiring users through the Apple App Store, Google Play, Mac App Store, Microsoft Store, web access, and content marketing (blog, social channels on Instagram/X/LinkedIn/Facebook/Bluesky, YouTube tutorials, podcast, and a public community forum). Revenue is generated via two annual subscription tiers introduced as part of a 2026 tier restructure: Silver ($49.99/year, formerly "Premium") covering cross-device sync and multimedia journaling, and Gold ($74.99/year) covering all Silver capabilities plus AI-powered features — Daily Chat (text and voice conversational journaling), Go Deeper reflection prompts, image generation, entry summaries, and title suggestions. All AI features operate under end-to-end encryption with no data used for training.

Name

Day One

Legal name

Automattic Inc.

Website

https://dayoneapp.com

Company type

Private

Founded year

2011

Operating status

Operating

Headcount range

11–50 employees

Short description

Day One is a cross-platform personal journaling application offering end-to-end encrypted text, photo, video, audio, and location entries on iOS, Android, Mac, Windows, Web, and Apple Watch, monetized via freemium subscriptions (Silver $49.99/year, Gold $74.99/year with AI features). The product serves individual consumers seeking private long-term journaling, memory preservation, and wellness reflection.

Ownership category

akta.pro rank

Product category

Personal Journaling Software

NAICS

Software Publishers (5132)

SIC

Services-Prepackaged Software (7372)

akta.pro primary industry

Email, Calendar & Scheduling (BPAMAMAC)

Keywords

• Personal journaling app
• Cross-platform diary software
• End-to-end encryption journaling
• Multimedia journal entries
• AI-powered reflective writing

Headquarters

HQ city

Lehi

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2C

Offering type

Software

Cost components

Technology or R&D, Personnel, Infrastructure, Operations, Marketing or Sales, Others

Revenue model

1. Premium Subscriptions: Day One generates revenue through tiered subscription plans. The free tier provides basic journaling functionality. The Silver tier ($49.99/year) offers unlimited device access and media logging. The Gold tier ($74.99/year) adds AI-powered features including Daily Chat conversational journaling, Go Deeper AI prompts, image generation, entry summaries, and title suggestions. Subscriptions auto-renew unless cancelled.

Pricing tiers

Go-to-market motion2 records

Distribution channels7 records

Marketing channels11 records

Core offering

Day One is a cross-platform personal journaling application available on iPhone, iPad, Android, Mac, Windows, Apple Watch, and web browsers. The app supports text, photos, video, audio, drawing, and location-tagged entries with end-to-end encryption, cloud sync across devices, and features such as On This Day memory recall and calendar view. A free tier provides basic journaling, while Silver ($49.99/year) adds multi-device sync and media logging, and Gold ($74.99/year) adds AI-powered features including conversational Daily Chat, Go Deeper prompts, image generation, entry summaries, and title suggestions.

Product overview

Day One is a unified journaling platform consisting of a core mobile and desktop application with subscription tiers (Silver and Gold), cloud sync infrastructure (Day One Sync), and supplementary features. The Silver plan ($49.99/year) provides cross-platform access and multimedia journaling; the Gold plan ($74.99/year) adds AI-powered features including Daily Chat conversational journaling, image generation, entry summaries, and title suggestions. Additional offerings include book printing, browser extensions, shared journals, and an experimental Labs program. The platform is available on iOS, Android, Mac, Windows, and web, with end-to-end encryption as a default security feature.

Differentiator

Problem solved

Functional benefit

Products and services

• Day One Journaling App Cross-platform personal journaling application available on iPhone, iPad, Android, Mac, Windows, Apple Watch, and web browsers. Supports text, photos, videos, drawings, audio recordings, and location-tagged entries with passcode/biometric security, calendar view, and the On This Day memory recall feature.
• Day One Book Printing Print-on-demand service allowing users to compile journal entries into physical books that are mailed to a specified address for a fee.
• Day One Browser Extensions Browser extensions that let users save web content directly into their Day One journal from any browser.
• Day One Sync Proprietary cloud-based synchronization service that backs up and syncs journal entries across all supported devices, with end-to-end encryption where the encryption key is stored locally on the device and optionally in iCloud.
• Apple Journal Import Tool Migration utility that enables Apple Journal users to transfer their entries into Day One through a dedicated import flow on iPhone, iPad, and Mac.

Quantifiable outcome

• Users report maintaining journaling streaks of 1,000+ days, demonstrating strong habit formation
• +2 more outcomes

Named customers5 records

Segments3 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

Yes

API docs

API detail

Core technology

AI maturity

App detail

Integration4 records

AI capability5 records

Feature10 records

Scale indicators5 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Apple Journal: Apple's native journaling app shipped with iOS 17.1. Directly competes with Day One by offering preinstalled journaling on iPhone, iPad, and Mac, with similar memory and reflection features. Day One has even launched an import tool to capture Apple Journal migrants.
• Journey: Cross-platform journaling app available on iOS, Android, Mac, Windows, and web. Closest direct competitor to Day One's premium multi-device journaling offering with end-to-end encryption and cloud sync, and a similar target customer.
• Penzu: Long-standing private online journaling service emphasizing encryption and privacy. Targets the same privacy-conscious journaling user base as Day One with cross-device access.
• Reflectly: AI-powered journaling and mood-tracking app with conversational prompts. Competes with Day One's Gold tier AI features by offering guided reflection and mental health journaling experiences.
• Daylio: Mood-tracking and micro-journaling app with a large consumer base. Targets the mental health journaling segment that overlaps with Day One's wellness use cases.
• Stoic: Mental health and journaling app focused on gratitude, mood tracking, and guided reflection. Directly competes with Day One's mental health and wellness segment.
• Bear: Apple-platform-focused note-taking and journaling app for iOS and Mac. Comparable cross-device note-taking product with strong design pedigree, competing for journaling use cases within the Apple ecosystem.

Broad incumbents

• Notion: Broad productivity and notes platform with collaborative journaling templates and Notion AI. Larger incumbent that addresses personal journaling as a use case within a much wider knowledge-management surface area.
• Evernote: Mature cross-platform notes and personal organization platform with long-tenured users. Incumbent in personal knowledge capture with broader scope than pure journaling.

Emerging players

• Mem: AI-native self-organizing workspace and memory app using conversational capture. Emerging direct competitor in the AI-augmented personal memory/journaling category overlapping with Day One's Gold tier.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/dayoneapp
• Facebookfacebook.com/dayoneapp
• LinkedInlinkedin.com/company/1716966
• Instagraminstagram.com/dayoneapp

Compliance4 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Day One