LanguageTool

Collaboration & Productivity8 vendorsUpdated Nov 11, 2026languagetool.org Subprocessor list

LanguageTool uses 8 subprocessors and infrastructure vendors, including AWS, Google Cloud and OpenAI, based on its public subprocessor list. Last checked Nov 11, 2026.

AI Stack · 2

Infrastructure · 6

AI Stack

Foundation Models

Aleph Alpha

1 companies

For generation of alternative wordings with rephrasing feature

OpenAI

823 companies

Only when using the rephrasing feature: generation of alternative wordings.

View their stack →

Infrastructure

Cloud & Networking

AWS

1307 companies

Cloud service for the database where access data and usage logs are stored. Only when using the online editor (languagetool.org/editor) or the desktop app for the Mac and Windows: storage of customer texts written in online editor/desktop app.

Cloudflare

615 companies

Only for languagetool.org Cloud service to determine approximate user location at country level and proxy service for DDoS prevention.

Google Cloud

1081 companies

Cloud service and server for hosting the websites and servers running the text checking software.

Hetzner

68 companies

Cloud service and server for hosting the websites and servers running the text checking software.

Analytics & BI

Amplitude

136 companies

Service provider utilized to perform processing activities related to data analytics and performance measurement.

Communications

Deutsche Telekom

3 companies

Cloud service and server for hosting the websites and servers running the text checking software.

Model labs reached through vendors 3

LanguageTool does not list these model providers. Vendors on its list name them on their own subprocessor lists.

Changes

Checked Nov 11, 2026Source

This is the first saved copy of LanguageTool’s subprocessor list. Added and removed vendors will show here after the next check.

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