# What does Day3 use?

Day3 (day3.co) shows public evidence of 13 tools, according to runsonwhat (last checked 2026-11-10).

- Industry: Marketing and Advertising
- Size: 11–50 employees
- Based in: Monsey, United States
- Founded: 2023
- LinkedIn: https://www.linkedin.com/company/day3co

## Edge & Hosting

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Cloudflare](https://www.runsonwhat.com/reverse/cloudflare) | CDN & Edge | Website code |  |
| [Bunny.net](https://www.runsonwhat.com/reverse/bunny) | CDN & Edge | Website code |  |

## Application

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [jQuery](https://www.runsonwhat.com/reverse/jquery) | Frontend | Website code |  |
| [GSAP](https://www.runsonwhat.com/reverse/gsap) | Media & UI | Website code |  |
| [Lottie](https://www.runsonwhat.com/reverse/lottie) | Media & UI | Website code |  |

## Data & Observability

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Google Analytics](https://www.runsonwhat.com/reverse/ga) | Analytics | Website code |  |

## Go-to-market

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Google Ads](https://www.runsonwhat.com/reverse/google-ads) | Ads & Pixels | Website code |  |
| [Webflow](https://www.runsonwhat.com/reverse/webflow) | Website & CMS | Custom domain, Website code |  |
| [Calendly](https://www.runsonwhat.com/reverse/calendly) | Sales & CRM | Website code |  |
| [MailerLite](https://www.runsonwhat.com/reverse/mailerlite) | Marketing | DNS verification records, Email records |  |
| [Cal.com](https://www.runsonwhat.com/reverse/calcom) | Sales & CRM | Website code |  |

## Company Ops

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Google Workspace](https://www.runsonwhat.com/reverse/google-workspace) | Workspace | DNS verification records, Email records, Website code |  |

## Recent changes at Day3

- 2026-11-10: started using [MailerLite](https://www.runsonwhat.com/reverse/mailerlite)
- 2026-11-10: stopped using [Namecheap](https://www.runsonwhat.com/reverse/namecheap)

## FAQ

### What tools does Day3 use?

As of November 2026, runsonwhat has found 13 tools at Day3 (day3.co) in public records. Edge & Hosting: Cloudflare and Bunny.net. Application: jQuery, GSAP and Lottie. Data & Observability: Google Analytics. Go-to-market: Google Ads, Webflow and Calendly. Company Ops: Google Workspace. Last checked November 10, 2026.

### What sales tools does Day3 use?

The sales tools runsonwhat has found at Day3 are Calendly and Cal.com (November 2026); no CRM shows up in Day3's public records. runsonwhat found Calendly through Calendly code on day3.co.

### What email provider does Day3 use?

Day3 uses Google Workspace for email and office software, according to runsonwhat (November 2026). runsonwhat found Google Workspace through a DNS verification record for Google Workspace and email records. Google Workspace is used by 421,820 companies runsonwhat tracks.

### What analytics tools does Day3 use?

Day3 uses Google Analytics for analytics, according to runsonwhat (November 2026). runsonwhat found Google Analytics through Google Analytics code on day3.co. Google Analytics is used by 904,071 companies runsonwhat tracks.

### What is Day3's website built with?

Day3 uses Webflow for its website, according to runsonwhat (November 2026). runsonwhat found Webflow through a subdomain that points at Webflow and code on day3.co. Webflow is used by 36,414 companies runsonwhat tracks.

### What marketing software does Day3 use?

Day3 uses MailerLite for marketing, according to runsonwhat (November 2026). runsonwhat found MailerLite through a DNS verification record for MailerLite and email records. MailerLite is used by 16,387 companies runsonwhat tracks.

### Does Day3 use jQuery?

Yes. runsonwhat found jQuery at Day3 through jQuery code on day3.co. jQuery is a Frontend tool used by 927,273 companies runsonwhat tracks.

### Has Day3 changed tools recently?

Yes. On runsonwhat's rechecks, Day3 started using MailerLite (latest on November 10, 2026) and stopped using Namecheap (latest on November 10, 2026). A change counts only between two checks of day3.co done the same way.

### Which companies have a tech stack similar to Day3's?

The companies with the stacks most like Day3's are Sellf Media, Chathero, Attributics and SENS Consult | Kozijnen, energielabels & verduurzamingsadvies,, according to runsonwhat (November 2026). Each shares 4 to 6 tools with Day3, and rare tools count for more than common ones like Google Workspace, so the match reflects real stack choices.

### How does runsonwhat know what Day3 uses?

runsonwhat reads public records only. Of the 13 tools at Day3, 9 were found through code on day3.co, 3 through DNS records and 1 through subdomains that point at the vendor. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and day3.co about monthly.


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Source: runsonwhat, https://www.runsonwhat.com/company/day3.co (updated November 2026). Counts are companies with direct public evidence of the tool (DNS records, certificates, website code, a real-browser crawl, subprocessor lists), so they are lower bounds. Methodology: https://www.runsonwhat.com/methodology.