# What does X (formerly Twitter) use?

X (formerly Twitter) (circos.com) shows public evidence of 9 tools, according to runsonwhat (last checked 2026-10-06).

- Industry: Internet
- Size: 51–200 employees
- Based in: Singapore, Singapore
- Founded: 2006
- LinkedIn: https://www.linkedin.com/company/circos-com-inc-

## Edge & Hosting

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

## Data & Observability

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Sentry](https://www.runsonwhat.com/reverse/sentry) | Monitoring | Website code |  |

## Go-to-market

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Meta Pixel](https://www.runsonwhat.com/reverse/meta-pixel) | Ads & Pixels | Website code |  |
| [Google Ad Manager](https://www.runsonwhat.com/reverse/google-ad-manager) | Ads & Pixels | Website config |  |
| [Magnite](https://www.runsonwhat.com/reverse/magnite) | Ads & Pixels | Website config |  |
| [PubMatic](https://www.runsonwhat.com/reverse/pubmatic) | Ads & Pixels | Website config |  |
| [TripleLift](https://www.runsonwhat.com/reverse/triplelift) | Ads & Pixels | Website config |  |

## Company Ops

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [HackerOne](https://www.runsonwhat.com/reverse/hackerone) | Security & Compliance | Website config |  |

## FAQ

### What tools does X (formerly Twitter) use?

As of October 2026, runsonwhat has found 9 tools at X (formerly Twitter) (circos.com) in public records. Edge & Hosting: Cloudflare. Data & Observability: Sentry. Go-to-market: Meta Pixel, Google Ad Manager and Magnite. Company Ops: HackerOne. Last checked October 6, 2026.

### What monitoring tools does X (formerly Twitter) use?

X (formerly Twitter) uses Sentry for monitoring, according to runsonwhat (October 2026). runsonwhat found Sentry through Sentry code on circos.com. Sentry is used by 76,707 companies runsonwhat tracks.

### Does X (formerly Twitter) use Cloudflare?

Yes. runsonwhat found Cloudflare at X (formerly Twitter) through Cloudflare code on circos.com. Cloudflare is a CDN & Edge tool used by 689,738 companies runsonwhat tracks.

### Which companies have a tech stack similar to X (formerly Twitter)'s?

The companies with the stacks most like X (formerly Twitter)'s are Navient, ChargePoint, GitHub and Shopify, according to runsonwhat (October 2026). Each shares 2 to 4 tools with X (formerly Twitter), and rare tools count for more than common ones like Google Workspace, so the match reflects real stack choices.

### How does runsonwhat know what X (formerly Twitter) uses?

runsonwhat reads public records only. Of the 9 tools at X (formerly Twitter), 5 were found through website configuration files, 4 through code on circos.com. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and circos.com about monthly.


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Source: runsonwhat, https://www.runsonwhat.com/company/circos.com (updated October 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.