# What does ClassFlow use?

ClassFlow (classflow.cy) shows public evidence of 17 tools, according to runsonwhat (last checked 2026-10-31).

## Edge & Hosting

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Cloudflare](https://www.runsonwhat.com/reverse/cloudflare) | CDN & Edge | Subprocessor list |  |
| [Vercel](https://www.runsonwhat.com/reverse/vercel) | Hosting & Cloud | DNS records |  |

## Application

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Next.js](https://www.runsonwhat.com/reverse/nextjs) | Frontend | Website code |  |
| [Stripe](https://www.runsonwhat.com/reverse/stripe) | Payments & Billing | Subprocessor list |  |
| [Supabase](https://www.runsonwhat.com/reverse/supabase) | Backend & Database | Subprocessor list |  |
| [Clerk](https://www.runsonwhat.com/reverse/clerk) | Auth & Identity | Subprocessor list |  |

## Data & Observability

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Google Analytics](https://www.runsonwhat.com/reverse/ga) | Analytics | Website code |  |
| [PostHog](https://www.runsonwhat.com/reverse/posthog) | Analytics | Website code, Subprocessor list | 2026-07 |
| [Vercel Analytics](https://www.runsonwhat.com/reverse/vercel-analytics) | Analytics | Website code |  |
| [Plausible](https://www.runsonwhat.com/reverse/plausible) | Analytics | Website code |  |

## Company Ops

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Cookiebot](https://www.runsonwhat.com/reverse/cookiebot) | Security & Compliance | Website code, Subprocessor list |  |
| [Let's Encrypt](https://www.runsonwhat.com/reverse/letsencrypt) | Security & Compliance | DNS records |  |
| [Sectigo](https://www.runsonwhat.com/reverse/sectigo) | Security & Compliance | DNS records |  |
| [Google Trust Services](https://www.runsonwhat.com/reverse/google-trust) | Security & Compliance | DNS records |  |
| [Resend](https://www.runsonwhat.com/reverse/resend) | Email Delivery | Email records |  |
| [Usercentrics](https://www.runsonwhat.com/reverse/usercentrics) | Security & Compliance | Subprocessor list |  |

## FAQ

### What tools does ClassFlow use?

As of November 2026, runsonwhat has found 17 tools at ClassFlow (classflow.cy) in public records. Edge & Hosting: Cloudflare and Vercel. Application: Next.js, Stripe and Supabase. Data & Observability: Google Analytics, PostHog and Vercel Analytics. Company Ops: Cookiebot, Let's Encrypt and Sectigo. Last checked October 31, 2026.

### What cloud does ClassFlow run on?

ClassFlow uses Vercel for hosting and cloud infrastructure, according to runsonwhat (November 2026). runsonwhat found Vercel through DNS records that point at Vercel. Vercel is used by 51,475 companies runsonwhat tracks.

### What payment provider does ClassFlow use?

ClassFlow uses Stripe for payments and billing, according to runsonwhat (November 2026). runsonwhat found Stripe through Stripe on classflow.cy's subprocessor list. Stripe is used by 30,970 companies runsonwhat tracks.

### What analytics tools does ClassFlow use?

ClassFlow uses Google Analytics for analytics, alongside PostHog, Vercel Analytics and Plausible, according to runsonwhat (November 2026). runsonwhat found Google Analytics through Google Analytics code on classflow.cy. Google Analytics is used by 905,972 companies runsonwhat tracks.

### What does ClassFlow use for login and identity?

ClassFlow uses Clerk for sign-in and identity, according to runsonwhat (November 2026). runsonwhat found Clerk through Clerk on classflow.cy's subprocessor list. Clerk is used by 1,414 companies runsonwhat tracks.

### How long has ClassFlow used PostHog?

ClassFlow has used PostHog since at least July 2026, going by the first public certificate of the classflow.cy subdomain that points at PostHog.

### Does ClassFlow use Cloudflare?

Yes. runsonwhat found Cloudflare at ClassFlow through Cloudflare on classflow.cy's subprocessor list. Cloudflare is a CDN & Edge tool used by 726,053 companies runsonwhat tracks.

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

The companies with the stacks most like ClassFlow's are Comfy Deploy, Orange Walrus, Themes for App and Mochi, according to runsonwhat (November 2026). Each shares 3 to 9 tools with ClassFlow, and rare tools count for more than common ones like Google Workspace, so the match reflects real stack choices.

### How does runsonwhat know what ClassFlow uses?

runsonwhat reads public records only. Of the 17 tools at ClassFlow, 6 were found through code on classflow.cy, 5 through DNS records, 5 through its own subprocessor list and 1 through email records. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and classflow.cy about monthly.


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Source: runsonwhat, https://www.runsonwhat.com/company/classflow.cy (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.