# What does Letters of Note use?

Letters of Note (lettersofnote.com) shows public evidence of 7 tools, according to runsonwhat (last checked 2026-10-31).

## Edge & Hosting

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

## Application

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

## Data & Observability

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

## Go-to-market

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Substack](https://www.runsonwhat.com/reverse/substack) | Website & CMS | Website code |  |

## Company Ops

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

## FAQ

### What tools does Letters of Note use?

As of October 2026, runsonwhat has found 7 tools at Letters of Note (lettersofnote.com) in public records. Edge & Hosting: Cloudflare and Namecheap. Application: Google Fonts. Data & Observability: Datadog. Go-to-market: Substack. Company Ops: Google Workspace. Last checked October 31, 2026.

### What email provider does Letters of Note use?

Letters of Note 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 406,784 companies runsonwhat tracks.

### What is Letters of Note's website built with?

Letters of Note uses Substack for its website, according to runsonwhat (October 2026). runsonwhat found Substack through Substack code on lettersofnote.com. Substack is used by 402 companies runsonwhat tracks.

### What monitoring tools does Letters of Note use?

Letters of Note uses Datadog for monitoring, according to runsonwhat (October 2026). runsonwhat found Datadog through Datadog code on lettersofnote.com. Datadog is used by 11,632 companies runsonwhat tracks.

### Does Letters of Note use Google Fonts?

Yes. runsonwhat found Google Fonts at Letters of Note through Google Fonts code on lettersofnote.com. Google Fonts is a Media & UI tool used by 820,123 companies runsonwhat tracks.

### Which companies have a tech stack similar to Letters of Note's?

The companies with the stacks most like Letters of Note's are Jewish World Review, ATM Holdings, PoliticusUSA and CBS News, according to runsonwhat (October 2026). Each shares 1 to 6 tools with Letters of Note, and rare tools count for more than common ones like Google Workspace, so the match reflects real stack choices.

### How does runsonwhat know what Letters of Note uses?

runsonwhat reads public records only. Of the 7 tools at Letters of Note, 4 were found through code on lettersofnote.com, 2 through DNS records and 1 through email records. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and lettersofnote.com about monthly.


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