Amazon Comprehend

Amazon Web Services (AWS) · checked 14 Nov 2026

#13 · Text Analysis Software

Visit aws.amazon.com ↗ Alternatives Amazon Comprehend vs ATLAS.ti

How it plugs in

—Public API

NoOpen source

TrialFree tier

Signal on Text Analysis Software5.4#13 of 27

Amazon Comprehend is a managed NLP service that uses machine learning to find insights and meaning in text.

Pricing

Amazon Comprehend free tier12 months from the first Amazon Comprehend request · 50K units of text (5M characters) per API per month · 5 topic modeling jobs up to 1MB each · Custom entities and classification excludedFree
Amazon Comprehend pay-as-you-goUsage-based; charges vary by API and usage. · Free tier: 50K units (5M characters) per API per month for eligible APIs · Available for 12 months from first request · Custom entities and classification have no free tierOn request

As aws.amazon.com lists them, checked 14 Nov 2026.

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Runs on

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Facts

Website: aws.amazon.com
Price: Not published
Free trial: Yes
Custom models: Users can train custom classification and entity recognition models using domain-specific examples without ML expertise.
Input formats: All features accept UTF-8 text; custom classification and custom entity recognition also accept images, PDFs, and Word files.
Integrations: Comprehend is designed to integrate with Amazon S3, AWS KMS, AWS Lambda, and Firehose.
Language support: Supported languages vary by feature; for example, PII detection and labeling support English and Spanish.
Notable feature limitation: Topic modeling, event detection, and prompt safety classification were no longer available to new customers starting April 30, 2026.
Operational modes: The service supports synchronous real-time analysis and asynchronous analysis jobs.
PII handling: The service can detect and redact personally identifiable information in text documents.
Pricing limit: NLP API requests are measured in 100-character units and have a minimum 300-character charge per request.
Privacy: AWS says text inputs may be stored and used to maintain and improve Comprehend and other AWS AI technologies, with an Organizations opt-out policy available.
Security: API and console requests use SSL, while IAM can control access to Comprehend actions and resources.
Text analysis: Its APIs extract entities, key phrases, sentiment, and language and return results in JSON.
Use cases: AWS describes uses including customer sentiment analytics, semantic search, and document knowledge management.

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