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Google Cloud Vision API
What it is
Google Cloud Vision API gives developers image-analysis features to integrate into applications through REST or RPC. Its capabilities include image labeling, face and landmark detection, OCR, and explicit-content tagging. Text Detection reads text in images, while Document Text Detection supports dense text, handwriting, and PDF or TIFF files. Object Localization returns labels and bounding boxes for recognized objects. Web Detection can return related web entities, matching image URLs and pages, visually similar images, and a best-guess label. Face Detection locates faces and facial landmarks and provides likelihood ratings, but it does not identify specific people. Documented workflows connect Vision with Cloud Storage, Cloud Functions, Pub/Sub, and Cloud Translation API. For Android and iOS apps using Google Cloud Vision services, Google recommends ML Kit for Firebase. Documented limits include 20 MB per image, 10 MB per JSON request, 16 images per synchronous annotate request, and 2,000 images per asynchronous batch request. The free plan includes the first 1,000 units per feature each month; charges vary by feature and usage tier. The listed starting price is $1.50.
For and against
For
- REST and RPC access
- OCR includes support for handwriting and PDFs
- Object Localization returns bounding boxes
- First 1,000 units per feature each month are free
Against
- Face Detection does not identify specific people
- Image and request sizes have documented limits
- Google recommends ML Kit for Android and iOS development
The verdict
Cloud Vision API offers several image-analysis features through developer-facing interfaces, with a free monthly allowance and usage-based charges. Face Detection locates faces but does not recognize specific individuals.
Who it suits
The API is intended for developers seeking prebuilt vision features to integrate into applications. It may fit projects that need image labels, text extraction, object localization, or face detection.
Plans and prices
First 1,000 units
Label, text, document text, Safe Search, face, celebrity, landmark, logo, image properties and crop-hint detection
Read 21 Oct 2026 · getapp.com
Units above 5,000,000
Vision API feature units
Read 21 Oct 2026 · getapp.com
Units 1,001 to 5,000,000
Vision API feature units
Read 21 Oct 2026 · getapp.com
Cloud Vision API pay-as-you-go
First 1,000 units per feature each month free · Label Detection: $1.50 per 1,000 units for 1,001–5,000,000; $1.00 thereafter · Text and Document Text Detection: $1.50 per 1,000 units for 1,001–5,000,000; $0.60 thereafter · Web Detection: $3.50 per 1,000 units for 1,001–5,000,000; contact Google for higher tier
Read 28 Sep 2026 · cloud.google.com
On the record
- Access
- The API is available through REST and RPC.cloud.google.com · read 28 Sep 2026
- API access
- Programmatic access is offered through client libraries and REST, with RPC also documented as an API reference.docs.cloud.google.com · read 21 Oct 2026
- Authentication
- Google Cloud IAM and Application Default Credentials are supported, with service-account and workload-identity options described for different environments.docs.cloud.google.com · read 21 Oct 2026
- Client languages
- Official quickstarts and samples cover C#, Go, Java, Node.js, PHP, Python and Ruby.docs.cloud.google.com · read 21 Oct 2026
- Company founding
- Gartner lists Google's year founded as 1998.gartner.com · read 21 Oct 2026
- Company headquarters
- LinkedIn lists Google's headquarters in Mountain View, California.linkedin.com · read 21 Oct 2026
- Company size
- LinkedIn lists Google as a public software-development company with 10,001+ employees.linkedin.com · read 21 Oct 2026
- Crop hints
- Crop-hint detection can return salient-region polygons and supports up to 16 requested aspect ratios.docs.cloud.google.com · read 21 Oct 2026
- Documentation depth
- Documentation includes setup guides, quickstarts, OCR and handwriting guides, REST/RPC references, quotas, languages, samples and release notes.docs.cloud.google.com · read 21 Oct 2026
- Encryption
- Google Cloud encrypts data at rest by default; asynchronous Vision processing uses ephemeral encryption keys and supports CMEK compliance.docs.cloud.google.com · read 21 Oct 2026
- Face detection limit
- Face Detection locates faces and facial landmarks and provides likelihood ratings, but specific individual facial recognition is not supported.docs.cloud.google.com · read 28 Sep 2026
- File limits
- Uploaded image files should not exceed 20 MB and base64 JSON requests are limited to 10 MB.docs.cloud.google.com · read 21 Oct 2026
- Image features
- Features include image labeling, face and landmark detection, OCR, and explicit-content tagging.cloud.google.com · read 28 Sep 2026
- Image labeling
- Label detection returns generalized image labels with descriptions, confidence scores and topicality ratings.docs.cloud.google.com · read 21 Oct 2026
- Image properties
- Image-properties analysis reports dominant RGBA colors, confidence and pixel fractions.docs.cloud.google.com · read 21 Oct 2026
- Image search
- Web Detection can return related web entities, matching image URLs, pages containing matching images, visually similar images, and a best-guess label.docs.cloud.google.com · read 28 Sep 2026
- Integrations
- Google documentation demonstrates workflows connecting Vision with Cloud Storage, Cloud Functions, Pub/Sub, Translation, Text-to-Speech and DLP.docs.cloud.google.com · read 21 Oct 2026
- Intended users
- The API is presented for developers seeking quick integration of prebuilt vision features into applications.cloud.google.com · read 28 Sep 2026
