# What does problems use?

problems (problems.dev) shows public evidence of 8 tools, according to runsonwhat (last checked 2026-10-29).

## Edge & Hosting

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Google Cloud](https://www.runsonwhat.com/reverse/gcp) | Hosting & Cloud | DNS records, Website code |  |

## Application

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Anthropic](https://www.runsonwhat.com/reverse/anthropic) | AI | DNS verification records |  |
| [Astro](https://www.runsonwhat.com/reverse/astro) | Frontend | Website code |  |

## Data & Observability

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

## Go-to-market

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Cal.com](https://www.runsonwhat.com/reverse/calcom) | Sales & CRM | Website code |  |

## Company Ops

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Google Workspace](https://www.runsonwhat.com/reverse/google-workspace) | Workspace | Email records |  |
| [Rippling](https://www.runsonwhat.com/reverse/rippling) | People & HR | DNS verification records |  |

## FAQ

### What tools does problems use?

As of November 2026, runsonwhat has found 8 tools at problems (problems.dev) in public records. Edge & Hosting: Google Cloud. Application: Anthropic and Astro. Data & Observability: PostHog. Go-to-market: Cal.com. Company Ops: Google Workspace and Rippling. Last checked October 29, 2026.

### What cloud does problems run on?

problems uses Google Cloud for hosting and cloud infrastructure, according to runsonwhat (November 2026). runsonwhat found Google Cloud through DNS records that point at Google Cloud and code on problems.dev. Google Cloud is used by 76,892 companies runsonwhat tracks.

### What sales tools does problems use?

The sales tools runsonwhat has found at problems are Cal.com (November 2026); no CRM shows up in problems' public records. runsonwhat found Cal.com through Cal.com code on problems.dev. Cal.com is used by 932 companies runsonwhat tracks.

### What email provider does problems use?

problems 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 411,655 companies runsonwhat tracks.

### What analytics tools does problems use?

problems uses PostHog for analytics, according to runsonwhat (November 2026). runsonwhat found PostHog through PostHog code on problems.dev. PostHog is used by 10,742 companies runsonwhat tracks.

### What does problems use for hiring and HR?

problems uses Rippling for hiring and HR, according to runsonwhat (November 2026). runsonwhat found Rippling through a DNS verification record for Rippling. Rippling is used by 3,117 companies runsonwhat tracks.

### Does problems use Anthropic?

Yes. runsonwhat found Anthropic at problems through a DNS verification record for Anthropic. Anthropic is a AI tool used by 65,173 companies runsonwhat tracks.

### Does problems use AI tools?

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

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

The companies with the stacks most like problems' are Ackee s.r.o., ORIENT Footdelight, Chathero and New Orange, according to runsonwhat (November 2026). Each shares 3 to 3 tools with problems, and rare tools count for more than common ones like Google Workspace, so the match reflects real stack choices.

### How does runsonwhat know what problems uses?

runsonwhat reads public records only. Of the 8 tools at problems, 4 were found through DNS records, 3 through code on problems.dev and 1 through email records. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and problems.dev about monthly.


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Source: runsonwhat, https://www.runsonwhat.com/company/problems.dev (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.