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Open source licenses.

Third-party components and licence notices used across Checkify products, including the mobile app, web services, and WordPress plugin.

Last updated: 5 May 2026

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About these notices

Checkify uses open-source software and third-party libraries to provide privacy-first identity and human verification features.

This page lists key third-party components and license information used by Checkify products, including the Checkify mobile app, web services, and WordPress plugin.

The Checkify mobile app may also include an in-app open source licenses screen showing license information for Flutter and Dart packages used by the app.

Flutter and Dart packages

The Checkify mobile app is built with Flutter and uses open-source Dart and Flutter packages.

Package license information for Flutter and Dart dependencies is made available through the app’s open source licenses section where supported by the package metadata.

Examples of packages used by the Checkify app may include:

  • Flutter SDK
  • Firebase Core
  • Firebase Messaging
  • Flutter Local Notifications
  • Camera
  • Permission Handler
  • Flutter Secure Storage
  • Crypto
  • Google ML Kit Text Recognition
  • Google ML Kit Face Detection
  • TFLite Flutter
  • QR Flutter
  • URL Launcher
  • Cryptography
  • Local Auth
  • Share Plus
  • Mobile Scanner
  • App Links
  • HTTP
  • Shared Preferences
  • Package Info Plus

Bundled machine learning model

MobileFaceNet model

Checkify may use a bundled MobileFaceNet-compatible TensorFlow Lite model for on-device face matching or verification.

Used for: on-device biometric comparison and verification support.

Source: https://github.com/foamliu/MobileFaceNet-PyTorch

License: Apache License 2.0

License text: Apache License 2.0

MobileFaceNet-PyTorch is licensed under the Apache License, Version 2.0. Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at: http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

WordPress plugin QR library

QRCode.js

The Checkify WordPress plugin includes QRCode.js to render QR codes locally in the visitor’s browser.

Source: https://github.com/davidshimjs/qrcodejs

License: MIT

Used for: rendering QR codes locally in the browser. The Checkify WordPress plugin does not use an external QR code generation service.

The QRCode.js MIT license is included with the Checkify WordPress plugin package in qrcode-license.txt.

Checkify services

Checkify connects to Checkify services to create and verify human verification requests.

For information about how Checkify handles data, please see:

Contact

For questions about open-source licenses or third-party notices, contact: privacy@checkify.me

Related documents

Questions about a licence?

Email privacy for open-source and third-party notice questions, or use the contact form for general support.

Email privacy@checkify.me Contact form