Flask 3.x icon

Websites using Flask 3.x

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Flask is a Python micro web framework ideal for rapidly constructing web applications, offering minimalism, flexibility, and modularity.

Lead List Exporter

1.3k live Flask 3.x sites, ready to export.

That's how many Flask 3.x websites are in VersionDB right now, each with its full tech stack, contact details, and social profiles.

Pick a ready-made template, or build your own filters in the Lead List Exporter and pay only for the rows you export.

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Just need a few domains? Export up to 10 free from a subset of our crawl.

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Flask 3.x companies in the United States

Every Flask 3.x website we detected in the United States.

Companies with personnel emails

Only sites where a personal, company-hosted email was found.

Decision makers on LinkedIn

Sites with at least one personnel LinkedIn profile.

Top 100,000 Flask 3.x sites by traffic

Start with the highest-traffic end of the dataset.

Sites on a .com domain

Limit results to Flask 3.x websites on .com domains.

Companies with phone numbers

Only sites where an organisation phone number was found.

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Versions

Which Flask 3.x versions are most used?

We could read a version number on 78% of Flask 3.x sites. Of those, the most common are Flask 3.0.1, on 839 sites, Flask 3.1.3, on 182 sites and Flask 3.0.3, on 43 sites.

78% on v3.0.1
Versions detected
7
Sites with a version
1,071
Share of sites by version
v3.0.1 78% v3.1.3 17% v3.0.3 4% v3.0.0 <1% v3.0.2 <1% v3.1.2 <1% v3.1.1 <1%
Live Websites

Websites Using Flask 3.x

A sample of live Flask 3.x sites from our latest crawl, with the other technologies each one runs.

Open in the Lead List Exporter
DomainAlso runsCrawl Date
machineland.be
HSTSGoogle AnalyticsGoogle Tag ManagerAmazon Web ServicesPython
September 28, 2026
koningsport.nl
Google Tag ManagerPythonLessPostgreSQLOdoo
September 27, 2026
cmim.org
PythonLessPostgreSQLOdoo
September 27, 2026
mountainlabs.eu
HTTP/3PythonLessPostgreSQLOdoo
September 26, 2026
bcd.ec
Python
September 26, 2026
esconet.fi
HTTP/3Google AnalyticsGoogle Tag ManagerPythonLess
September 26, 2026
sumathitextile.com
HTTP/3PythonLessPostgreSQLOdoo
September 26, 2026
edv-kohlberger.de
PythonLessPostgreSQLOdoo
September 25, 2026
fcindustria.mx
HSTSPythonLessPostgreSQLOdoo
September 24, 2026
eletech.cl
PythonLessPostgreSQLOdoo
September 24, 2026

How many websites use Flask 3.x?

We found Flask 3.x on 1,379 websites in our September 2026 crawl, across 99 countries.

Which countries use Flask 3.x the most?

By number of websites, the top countries are United States (19%, 260 sites), Germany (10%, 139 sites), France (9%, 120 sites), Spain (5%, 65 sites) and Netherlands (4%, 52 sites). Together they account for 46% of the 1,379 Flask 3.x sites we track. 40% of the sites are in English, and .com is the most used domain ending, on 33% of them.

Where are Flask 3.x websites hosted?

The networks carrying the most Flask 3.x sites are Hetzner Online GmbH (153 sites), OVH SAS (139 sites) and Amazon.com, Inc. (134 sites).

What technologies are used with Flask 3.x?

Across the 1,379 Flask 3.x sites we track, the technologies most often found alongside it are Python (100%, 1,379 sites), PostgreSQL (60%, 834 sites), Less (60%, 832 sites), Odoo (60%, 832 sites) and HTTP/3 (23%, 322 sites).

Deep Dive

Breakdown of Flask 3.x websites

What else they run, plus their language, hosting network, domain extension and country.

FAQ

Answers drawn from our latest crawl of Flask 3.x websites. Anything else, email us and we will look it up.

Through our own crawl, which checks each site's HTML, scripts and headers rather than relying on self-reported data.