# What does Leftbrain use?

Leftbrain (useleftbrain.com) shows public evidence of 17 tools, according to runsonwhat (last checked 2026-10-29).

- Industry: Accounting
- Size: 11–50 employees
- Based in: Los Angeles, United States
- Founded: 2019
- LinkedIn: https://www.linkedin.com/company/useleftbrain

## Edge & Hosting

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [GoDaddy](https://www.runsonwhat.com/reverse/godaddy) | DNS | DNS records |  |
| [Fastly](https://www.runsonwhat.com/reverse/fastly) | CDN & Edge | DNS records, Website code |  |
| [Fly.io](https://www.runsonwhat.com/reverse/fly) | Hosting & Cloud | Website code |  |

## Application

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [jQuery](https://www.runsonwhat.com/reverse/jquery) | Frontend | Website code |  |
| [Font Awesome](https://www.runsonwhat.com/reverse/fontawesome) | Media & UI | Website code |  |
| [Vimeo](https://www.runsonwhat.com/reverse/vimeo) | Media & UI | Website code |  |
| [YouTube](https://www.runsonwhat.com/reverse/youtube) | Media & UI | Website code |  |
| [Adobe Fonts](https://www.runsonwhat.com/reverse/adobe-fonts) | 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 |
|---|---|---|---|
| [WordPress](https://www.runsonwhat.com/reverse/wordpress) | Website & CMS | Website code |  |
| [Yoast SEO](https://www.runsonwhat.com/reverse/yoast) | Website & CMS | Website code |  |
| [HubSpot](https://www.runsonwhat.com/reverse/hubspot) | Sales & CRM | Email records |  |

## Company Ops

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Microsoft 365](https://www.runsonwhat.com/reverse/microsoft-365) | Workspace | Email records |  |
| [Google Workspace](https://www.runsonwhat.com/reverse/google-workspace) | Workspace | Email records |  |
| [CookieYes](https://www.runsonwhat.com/reverse/cookieyes) | Security & Compliance | Website code |  |
| [Mailgun](https://www.runsonwhat.com/reverse/mailgun) | Email Delivery | Email records |  |

## FAQ

### What tools does Leftbrain use?

As of November 2026, runsonwhat has found 17 tools at Leftbrain (useleftbrain.com) in public records. Edge & Hosting: GoDaddy, Fastly and Fly.io. Application: jQuery, Font Awesome and Vimeo. Data & Observability: Google Analytics. Go-to-market: WordPress, Yoast SEO and HubSpot. Company Ops: Microsoft 365, Google Workspace and CookieYes. Last checked October 29, 2026.

### What cloud does Leftbrain run on?

Leftbrain uses Fly.io for hosting and cloud infrastructure, according to runsonwhat (November 2026). runsonwhat found Fly.io through Fly.io code on useleftbrain.com. Fly.io is used by 5,470 companies runsonwhat tracks.

### What CRM does Leftbrain use?

Leftbrain uses HubSpot for its CRM, according to runsonwhat (November 2026). runsonwhat found HubSpot through email records that authorize HubSpot. HubSpot is used by 96,189 companies runsonwhat tracks.

### What email provider does Leftbrain use?

Leftbrain uses Microsoft 365 for email and office software, alongside Google Workspace, according to runsonwhat (November 2026). runsonwhat found Microsoft 365 through email records that authorize Microsoft 365. Microsoft 365 is used by 719,368 companies runsonwhat tracks.

### What analytics tools does Leftbrain use?

Leftbrain uses Google Analytics for analytics, according to runsonwhat (November 2026). runsonwhat found Google Analytics through Google Analytics code on useleftbrain.com. Google Analytics is used by 906,644 companies runsonwhat tracks.

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

Leftbrain uses WordPress for its website, alongside Yoast SEO, according to runsonwhat (November 2026). runsonwhat found WordPress through WordPress code on useleftbrain.com. WordPress is used by 607,220 companies runsonwhat tracks.

### Does Leftbrain use jQuery?

Yes. runsonwhat found jQuery at Leftbrain through jQuery code on useleftbrain.com. jQuery is a Frontend tool used by 930,423 companies runsonwhat tracks.

### How does runsonwhat know what Leftbrain uses?

runsonwhat reads public records only. Of the 17 tools at Leftbrain, 10 were found through code on useleftbrain.com, 4 through email records and 3 through DNS records. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and useleftbrain.com about monthly.


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Source: runsonwhat, https://www.runsonwhat.com/company/useleftbrain.com (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.