Day91 vs timeOS
Day91 vs timeOS, compared side by side on 10 data points: what each one does, how big it is, what it has raised, the tech running each site, and what users report. We score both out of 100 on traction, team and visibility: Day91 is on 9/100 and timeOS on 55/100.
Where each one leads
Day91
- agent readiness: 58/100 against 28/100
timeOS
- our overall score: 55/100 against 9/100
At a glance
| Measure | Day91 | timeOS |
|---|---|---|
| What it is | A 91-day AI-guided transformation system designed to help you build consistency, maintain momentum, and finish what you start. | AI-powered calendar assistant that automates scheduling, note-taking, and task management. |
| Category | Agentic AI, AI Agent, Personal Agent Data Vault, Productivity Tools | Personal, Scheduling, Productivity, Agentic AI |
| Sells toBusiness model | B2C | B2C |
| Offering | Software | Software |
| Founded | Not published | 2019 |
| Headquarters | Not published | San Francisco, United States |
| Status | Active | Active |
Size, funding and growth
| Measure | Day91 | timeOS |
|---|---|---|
| Employees | Not published | 14 |
| Total funding | Not published | $3.3M |
| Latest round | Not published | Seed |
| LinkedIn followers | Not published | 3,554 |
StartupHub scores
Our own 0-100 ratings. They measure company strength and site quality, not which product suits you.
| Measure | Day91 | timeOS |
|---|---|---|
| StartupHub scoreOur 0-100 rating | 9/100 | 55/100 |
| Traction | Not published | 44/100 |
| Team | Not published | 70/100 |
| Community | Not published | 8/100 |
| Search visibility | 8/100 | 38/100 |
| Quality | Not published | 62/100 |
| Agent readinessHow well an AI agent can read and act on the site | D (58/100) | F (28/100) |
| Domain ratingLink authority, 0-100 | Not published | 30/100 |
Technology
Detected on each public site, so it reflects the marketing stack as well as the product.
| Measure | Day91 | timeOS |
|---|---|---|
| Hosting | Google Cloud | Not detected |
| CDN | Not detected | Cloudflare |
| CMS | Replit | Webflow |
| Analytics | Not detected | Google Analytics 4, Google Tag Manager, Mixpanel |
| Open source | No | Yes |
Day91 vs timeOS: common questions
Which is better, Day91 or timeOS?
On our 0-100 score timeOS rates higher (55/100 against 9/100). The score weights traction, team, visibility and profile completeness, so it reflects company strength rather than which product suits you. We compare the two on 10 data points above: read the rows that match what you are buying for.
How do Day91 and timeOS compare on the numbers?
Day91 leads on agent readiness (58/100 against 28/100). timeOS leads on our overall score (55/100 against 9/100).
Read the full Day91 review and pricing or the timeOS review and pricing. You can also browse other Day91 alternatives we track.