glean-sdk
Mozilla's Glean Telemetry SDK: The Machine that Goes 'Ping!'
Decision gist · record as of 2026-08-14
Yes, if you need to send telemetry to Mozilla's infrastructure or adopt a schema-driven telemetry framework. The SDK is actively maintained, has no known vulnerabilities, and ships with pre-built wheels for common platforms. The main caveat is that license treatment is unclear in the package metadata—verify the actual license (likely MPL 2.0 per the repository) before use in proprietary contexts.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- Requires Python 3.9 or later.
- Glean core requires Rust 1.90.0 or later for development/building from source.
- Medium install friction due to pre-built wheels for multiple platforms (macOS, Linux, Windows, ARM).
License · maintenance · safety
(unclear) — License treatment is unclear in the package metadata, though the repository indicates Mozilla Public License v2.0. Verify the actual license terms before use in proprietary or restricted contexts.
last release 2026-06-22 (53 days) · last repo commit 2026-08-14 · 460 stars
0 known vulnerabilities (OSV.dev, 2026-08-14) · 221,043 downloads/mo, #9,285 on PyPI
Alternatives
Verify before relying
pip install glean-sdk
from glean import Glean
Glean.initialize(app_id='my_app', app_version='1.0.0')- Exact scope and completeness of telemetry metrics supported beyond the SDK book documentation
- Data retention and privacy guarantees for telemetry sent to Mozilla's pipeline
- Whether glean-parser dependency is required at runtime or only for schema validation workflows
What it is and what it does
Glean SDK is Mozilla's production telemetry framework, providing Python bindings to a Rust-backed core library. It enables applications to define, collect, and transmit structured telemetry data (events, counters, timings, and other metrics) through a standardized schema-driven approach. The SDK handles validation, batching, and transmission of telemetry pings to Mozilla's data infrastructure.
The package depends on semver for version handling and glean-parser for schema validation. It ships as pre-built wheels for major platforms (macOS, Linux, Windows) and architectures (x86_64, ARM64), reducing installation friction. The library is actively maintained by Mozilla's data platform team and has been in production use since 2019.
Use it for
- Collect structured telemetry from Python applications to understand user behavior and feature adoption
- Validate telemetry schemas at build time using glean-parser before runtime data collection
- Send batched usage metrics and performance data to Mozilla's telemetry pipeline for analysis
- Track application events, crashes, and performance metrics in a privacy-respecting, schema-validated way
- Integrate telemetry collection into desktop or server applications without building custom instrumentation
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
Yes, if you need to send telemetry to Mozilla's infrastructure or adopt a schema-driven telemetry framework.
The SDK is actively maintained, has no known vulnerabilities, and ships with pre-built wheels for common platforms. The main caveat is that license treatment is unclear in the package metadata—verify the actual license (likely MPL 2.0 per the repository) before use in proprietary contexts.
Install
glean-sdk on PyPI
Before you install
Medium install friction due to pre-built wheels for multiple platforms (macOS, Linux, Windows, ARM). Requires Python 3.9+. Active maintenance with recent commits and a stable release history since 2019.
Requires Python 3.9 or later. Glean core requires Rust 1.90.0 or later for development/building from source.
License in practice
License treatment is unclear in the package metadata, though the repository indicates Mozilla Public License v2.0. Verify the actual license terms before use in proprietary or restricted contexts.
Quickstart
pip install glean-sdk
from glean import Glean
Glean.initialize(app_id='my_app', app_version='1.0.0')Verify before relying
- Exact scope and completeness of telemetry metrics supported beyond the SDK book documentation
- Data retention and privacy guarantees for telemetry sent to Mozilla's pipeline
- Whether glean-parser dependency is required at runtime or only for schema validation workflows
Package facts
| License | Not declared unclear |
| Python support | Supports the current Python release >=3.9 |
| Install friction | Medium. Platform-specific wheel |
| Runtime dependencies | 2 packagessemverglean-parser |
| Maintenance | Actively maintained 53 days since the last release |
| Last repo commit | |
| First released | |
| Downloads | 221,043 / month, #9,285 on PyPI 30-day window, as of 2026-08-14 |
| Known vulnerabilities | None known OSV.dev, checked 2026-08-14 |
| Classifiers | Intended Audience :: DevelopersNatural Language :: EnglishProgramming Language :: Python :: 3Programming Language :: Python :: Implementation :: CPythonProgramming Language :: Rust |
Evidence: glean_sdk-69.0.0-py3-none-macosx_10_12_x86_64.macosx_11_0_arm64.macosx_10_12_universal2.whl; glean_sdk-69.0.0-py3-none-macosx_10_12_x86_64.whl; glean_sdk-69.0.0-py3-none-macosx_11_0_arm64.whl; glean_sdk-69.0.0-py3-none-manylinux_2_17_aarch64.manylinux2014_aarch64.whl; glean_sdk-69.0.0-py3-none-manylinux_2_17_x86_64.manylinux2014_x86_64.whl; glean_sdk-69.0.0-py3-none-manylinux_2_34_x86_64.whl; glean_sdk-69.0.0-py3-none-win_amd64.whl; glean_sdk-69.0.0-py3-none-win_arm64.whl
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See also glean-api-client · glean-parser · mozilla-taskgraph · mozlog · azureml-telemetry · mozrunner · mozdevice · mozfile · kanaries-track · mozprofile