runsonwhat

Opennote's tech stack

What does Opennote use?

Opennote (opennote.com) uses at least 19 tools we can see from public records, including Amazon Web Services for hosting, Google Workspace for email and documents, PostHog for analytics and Dub for marketing. Last checked .

“Opennote is the notebook that thinks with you.”

Industry
Consumer
Size
1–10 employees
Based in
San Francisco, United States
Founded
2025
LinkedIn
Company page
Re-check liveVisit opennote.com
Tools found
19
Categories
11
Layers
5 of 5
Changes seen
1

Opennote's stack, layer by layer

Each tool links to the other companies we've found using it. The label says what kind of public trace gave it away.

Edge & Hosting

3 tools, where the bytes are served from

Hosting & Cloud

CDN & Edge

Application

5 tools, what the product is built with

Frontend

Backend & Database

Media & UI

Data & Observability

5 tools, what they measure and store

Monitoring

Analytics

Go-to-market

2 tools, how they find and keep customers

Marketing

Company Ops

4 tools, what the team runs on day to day

Email Delivery

Workspace

Security & Compliance

What changed at Opennote

Recent starts and stops

  1. StartedResend

Companies like Opennote also use

Tools common among companies with a similar stack that we haven't found at Opennote.

Companies with a stack like Opennote's

Ranked by shared tools, with rare tools counting more.

More Consumer companies

Other Consumer companies we've checked.

Opennote tech stack FAQ

What tools does Opennote use?

As of October 2026, runsonwhat has found 19 tools at Opennote (opennote.com) in public records. Edge & Hosting: Cloudflare, Amazon Web Services and Vercel. Application: Google Fonts, React and Tailwind CSS. Data & Observability: Sentry, web-vitals and PostHog. Go-to-market: Dub. Company Ops: Google Workspace, Amazon SES and Resend. Last checked October 20, 2026.

What cloud does Opennote run on?

Opennote uses Amazon Web Services for hosting and cloud infrastructure, alongside Vercel, according to runsonwhat (October 2026). runsonwhat found Amazon Web Services through Amazon Web Services code on opennote.com. Amazon Web Services is used by 145,587 companies runsonwhat tracks.

What email provider does Opennote use?

Opennote uses Google Workspace for email and office software, according to runsonwhat (October 2026). runsonwhat found Google Workspace through email records that authorize Google Workspace and code on opennote.com. Google Workspace is used by 402,281 companies runsonwhat tracks.

What analytics tools does Opennote use?

Opennote uses PostHog for analytics, alongside Vercel Analytics, according to runsonwhat (October 2026). runsonwhat found PostHog through PostHog code on opennote.com. PostHog is used by 9,881 companies runsonwhat tracks.

What marketing software does Opennote use?

Opennote uses Dub for marketing, according to runsonwhat (October 2026). runsonwhat found Dub through a subdomain that points at Dub and code on opennote.com. Dub is used by 505 companies runsonwhat tracks.

What monitoring tools does Opennote use?

Opennote uses Sentry for monitoring, alongside web-vitals and Better Stack, according to runsonwhat (October 2026). runsonwhat found Sentry through Sentry code on opennote.com. Sentry is used by 78,427 companies runsonwhat tracks.

Does Opennote use Google Fonts?

Yes. runsonwhat found Google Fonts at Opennote through Google Fonts code on opennote.com. Google Fonts is a Media & UI tool used by 807,994 companies runsonwhat tracks.

Has Opennote changed tools recently?

Yes. On runsonwhat's rechecks, Opennote started using Resend (latest on October 9, 2026). A change counts only between two checks of opennote.com done the same way.

Which companies have a tech stack similar to Opennote's?

The companies with the stacks most like Opennote's are Vextria, Runable, PeerDB and Speakeasy API, according to runsonwhat (October 2026). Each shares 6 to 11 tools with Opennote, and rare tools count for more than common ones like Google Workspace, so the match reflects real stack choices.

How does runsonwhat know what Opennote uses?

runsonwhat reads public records only. Of the 19 tools at Opennote, 10 were found through code on opennote.com, 4 through subdomains that point at the vendor, 3 through email records and 2 through DNS records. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and opennote.com about monthly.

We read public traces only: DNS and email records, certificate logs, website code and published subprocessor lists. A tool is listed when a direct record backs it up, and dropped when a recheck no longer finds it. Is this your company? See how to opt out.