# What does Sleek use?

Sleek (onsleek.com) shows public evidence of 9 tools, according to runsonwhat (last checked 2026-10-20).

- Industry: B2B
- Size: 1–10 employees
- Based in: Toronto, Canada
- Founded: 2021
- LinkedIn: https://www.linkedin.com/company/onsleek

## Edge & Hosting

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Cloudflare](https://www.runsonwhat.com/reverse/cloudflare) | CDN & Edge | Website code |  |
| [Amazon Route 53](https://www.runsonwhat.com/reverse/route53) | DNS | DNS records |  |
| [Render](https://www.runsonwhat.com/reverse/render) | Hosting & Cloud | Custom domain, Website code |  |

## Go-to-market

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Customer.io](https://www.runsonwhat.com/reverse/customerio) | Marketing | Custom domain |  |
| [TinyURL](https://www.runsonwhat.com/reverse/tinyurl) | Marketing | Custom domain |  |

## Company Ops

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Google Workspace](https://www.runsonwhat.com/reverse/google-workspace) | Workspace | Email records |  |
| [Amazon SES](https://www.runsonwhat.com/reverse/ses) | Email Delivery | Email records |  |
| [Postmark](https://www.runsonwhat.com/reverse/postmark) | Email Delivery | Email records |  |

## FAQ

### What tools does Sleek use?

As of October 2026, runsonwhat has found 9 tools at Sleek (onsleek.com) in public records. Edge & Hosting: Cloudflare, Amazon Route 53 and Render. Go-to-market: Customer.io and TinyURL. Company Ops: Google Workspace, Amazon SES and Postmark. Last checked October 20, 2026.

### What cloud does Sleek run on?

Sleek uses Render for hosting and cloud infrastructure, according to runsonwhat (October 2026). runsonwhat found Render through a subdomain that points at Render and code on onsleek.com. Render is used by 2,424 companies runsonwhat tracks.

### What email provider does Sleek use?

Sleek uses Google Workspace for email and office software, according to runsonwhat (October 2026). runsonwhat found Google Workspace through email records that authorize Google Workspace. Google Workspace is used by 403,671 companies runsonwhat tracks.

### What marketing software does Sleek use?

Sleek uses Customer.io for marketing, alongside TinyURL, according to runsonwhat (October 2026). runsonwhat found Customer.io through a subdomain that points at Customer.io. Customer.io is used by 1,853 companies runsonwhat tracks.

### Does Sleek use Cloudflare?

Yes. runsonwhat found Cloudflare at Sleek through Cloudflare code on onsleek.com. Cloudflare is a CDN & Edge tool used by 705,167 companies runsonwhat tracks.

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

The companies with the stacks most like Sleek's are Emerge Career, Xweather, Clear Labs and Explorex, according to runsonwhat (October 2026). Each shares 3 to 6 tools with Sleek, and rare tools count for more than common ones like Google Workspace, so the match reflects real stack choices.

### How does runsonwhat know what Sleek uses?

runsonwhat reads public records only. Of the 9 tools at Sleek, 3 were found through email records, 3 through subdomains that point at the vendor, 2 through DNS records and 1 through code on onsleek.com. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and onsleek.com about monthly.


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