# What does Opus use?

Opus (feelopus.com) shows public evidence of 13 tools, according to runsonwhat (last checked 2026-11-09).

- Industry: Health, Wellness and Fitness
- Size: 51–200 employees
- Based in: Austin, United States
- Founded: 2019
- LinkedIn: https://www.linkedin.com/company/feelopus

## Edge & Hosting

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Amazon Web Services](https://www.runsonwhat.com/reverse/aws) | Hosting & Cloud | Custom domain |  |
| [Google Cloud](https://www.runsonwhat.com/reverse/gcp) | Hosting & Cloud | DNS records |  |
| [Vercel](https://www.runsonwhat.com/reverse/vercel) | Hosting & Cloud | Custom domain |  |

## Application

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Google Fonts](https://www.runsonwhat.com/reverse/google-fonts) | Media & UI | Website code |  |
| [OpenAI](https://www.runsonwhat.com/reverse/openai) | AI | DNS verification records |  |

## Data & Observability

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

## Go-to-market

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Zendesk](https://www.runsonwhat.com/reverse/zendesk) | Support & Docs | Custom domain, Email records |  |
| [Klaviyo](https://www.runsonwhat.com/reverse/klaviyo) | Marketing | DNS verification records, Website code |  |
| [Squarespace](https://www.runsonwhat.com/reverse/squarespace) | Website & CMS | Custom domain, DNS records |  |
| [Discourse](https://www.runsonwhat.com/reverse/discourse) | Support & Docs | Custom domain |  |

## Company Ops

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Google Workspace](https://www.runsonwhat.com/reverse/google-workspace) | Workspace | Email records |  |
| [Mailgun](https://www.runsonwhat.com/reverse/mailgun) | Email Delivery | Custom domain, Email records |  |

## FAQ

### What tools does Opus use?

As of November 2026, runsonwhat has found 13 tools at Opus (feelopus.com) in public records. Edge & Hosting: Amazon Web Services, Google Cloud and Vercel. Application: Google Fonts and OpenAI. Data & Observability: Google Analytics. Go-to-market: Zendesk, Klaviyo and Squarespace. Company Ops: Google Workspace and Mailgun. Last checked November 9, 2026.

### What cloud does Opus run on?

Opus uses Amazon Web Services for hosting and cloud infrastructure, alongside Google Cloud and Vercel, according to runsonwhat (November 2026). runsonwhat found Amazon Web Services through a subdomain that points at Amazon Web Services. Amazon Web Services is used by 147,299 companies runsonwhat tracks.

### What email provider does Opus use?

Opus uses Google Workspace for email and office software, according to runsonwhat (November 2026). runsonwhat found Google Workspace through email records that authorize Google Workspace. Google Workspace is used by 418,190 companies runsonwhat tracks.

### What does Opus use for customer support?

Opus uses Zendesk for customer support and documentation, alongside Discourse, according to runsonwhat (November 2026). runsonwhat found Zendesk through a subdomain that points at Zendesk and email records. Zendesk is used by 43,489 companies runsonwhat tracks.

### What analytics tools does Opus use?

Opus uses Google Analytics for analytics, according to runsonwhat (November 2026). runsonwhat found Google Analytics through Google Analytics code on feelopus.com. Google Analytics is used by 903,781 companies runsonwhat tracks.

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

Opus uses Squarespace for its website, according to runsonwhat (November 2026). runsonwhat found Squarespace through a subdomain that points at Squarespace and DNS records. Squarespace is used by 34,462 companies runsonwhat tracks.

### Does Opus use Google Fonts?

Yes. runsonwhat found Google Fonts at Opus through Google Fonts code on feelopus.com. Google Fonts is a Media & UI tool used by 825,399 companies runsonwhat tracks.

### Does Opus use AI tools?

Yes. runsonwhat has found OpenAI at Opus; OpenAI, for example, through a DNS verification record for OpenAI. AI services called only from servers leave no public trace, so Opus may use more AI tools than these.

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

The companies with the stacks most like Opus' are Particle by Digi, Metabase, Chitchat and Mural, according to runsonwhat (November 2026). Each shares 3 to 7 tools with Opus, and rare tools count for more than common ones like Google Workspace, so the match reflects real stack choices.

### How does runsonwhat know what Opus uses?

runsonwhat reads public records only. Of the 13 tools at Opus, 6 were found through subdomains that point at the vendor, 4 through DNS records, 2 through code on feelopus.com and 1 through email records. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and feelopus.com about monthly.


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Source: runsonwhat, https://www.runsonwhat.com/company/feelopus.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.