Amazon Comprehend
Managed natural language processing service for analyzing text and extracting structured insights
- Vendor
- Amazon Web Services, Inc.
- Also known as
- amazon-comprehend
Available worldwide · Popular in: US
What is Amazon Comprehend?
Amazon Comprehend is an AWS managed service that analyzes unstructured text to identify entities, sentiment, key phrases, topics, language, and personally identifiable information. It offers pre-built APIs for common NLP tasks and custom model training capabilities for domain-specific document classification and entity extraction.
Amazon Comprehend pricing
Plans, per-tier features and add-ons, dated and linked to live pricing. Pricing changes often; always verify at source before you rely on it.
Usage-based pricing starting at $0.0001 per unit for standard APIs. Free tier provides 50K units per API per month for 12 months. Custom models charged separately.
Standard APIs
FreePre-built entity recognition, sentiment analysis, syntax analysis, key phrase extraction, language detection, toxicity detection, and prompt safety classification
- free_tier
- 50K units per API per month for 12 months (5M characters)
- Entity recognition
- Sentiment analysis
- Syntax analysis
- Key phrase extraction
- Language detection
- Toxicity detection
- Prompt safety classification
- PII detection and redaction
Custom Classification and Entity Models
Custom model training and inference for document classification and entity extraction
- Custom model training
- Asynchronous batch inference
- Synchronous real-time inference with provisioned endpoints
- Model management and storage
What Amazon Comprehend does
The capabilities that matter for nlp apis, normalised so it lines up with every alternative. “-” means we haven't confirmed it, not that it's missing.
- Custom model training
- ✓
- Domain specific models
- ✓
- Deployment model
- Cloud API only
- Batch processing
- ✓
- Real time latency
- ✓
- Embeddings endpoint
- -
- Data residency EU
- -
- Open source
- ✗
- Pricing model
- Usage based compute
Platform & deployment
Independently observed- CLI
- Web
- Cloud / SaaS
Integrations (2)
Independently observed- Knowledge Bases←•
- Bedrock Data Automation←•
Security & compliance
Independently observed- PCI DSSactive
- HIPAA/HITECHactive
- FedRAMPactive
- GDPRactive
- FIPS 140-3active
- NIST 800-171active
Amazon Comprehend FAQ
Common questions about Amazon Comprehend, answered from independent, dated evidence.
What is Amazon Comprehend?
A managed service offering access to multiple third-party foundation models for inference workloads, with support for fine-tuned custom models, batch processing at discounted rates, and retrieval-augmented generation through knowledge bases. It is indexed under NLP Apis.
Is Amazon Comprehend free?
Amazon Comprehend offers a free tier, so you can start without paying. Paid plans are also available: On-Demand Standard Tier, Provisioned Throughput, Fine-Tuning Training and Batch Inference. Pricing changes often, so verify at source before relying on it.
What platforms does Amazon Comprehend support?
Amazon Comprehend supports the web and a command-line interface. Platforms we have not confirmed are simply not listed here rather than ruled out.
Can Amazon Comprehend be self-hosted?
We have only confirmed a cloud / SaaS deployment for Amazon Comprehend, so it appears to be vendor-hosted. If a self-hosted option exists we have not found it documented publicly.
What security certifications does Amazon Comprehend have?
We have independently confirmed HIPAA and GDPR for Amazon Comprehend. Certifications we do not list are ones we have not been able to verify from public sources, which is not the same as Amazon Comprehend not holding them. Always confirm compliance directly before you rely on it.
Where is Amazon Comprehend available?
Amazon Comprehend is available worldwide. Its primary market is the United States.
Amazon Comprehend alternatives
Other nlp apis we track, ranked by the same independent score.
- CohereEnterprise AI that you fully control and deploy according to your requirementsmedium · 55%
- NLTKlow · 25%
- TextRazorNLP API for extracting meaning and understanding from textlow · 24%
- spaCyProduction-grade Python library for natural language processinglow · 39%
- Hugging Face TransformersAn open-source library for building and working with pre-trained transformer models for natural language, vision, audio, and multimodal tasks.low · 5%
- Stanford CoreNLPA Java library for extracting linguistic information from textlow · 34%
Compare Amazon Comprehend
Side by side against other nlp apis, attribute by attribute, with a source on every value.
The vioscaleAI score: one lens on the evidence
Not user reviews and not a paid placement: a confidence-weighted blend of the independent signals below (adoption, activity, security posture, and more), which you can sort and re-weight yourself. Vendors can correct their listing but can never move their rank, and stars are weighted low as a vanity metric. It is one way to read the evidence for Amazon Comprehend, not the verdict.
| Signal | Score | Weight | Contribution | Evidence |
|---|---|---|---|---|
| Pricing transparency | 100 | 0.05 | 5.4 | ✓ |
| Security posture | 35 | 0.12 | 4.3 | ✓ |
| Price level | 80 | 0.04 | 3.3 | ✓ |
| Capabilities | 67 | 0.04 | 2.5 | ✓ |
| Integrations | 14 | 0.04 | 0.6 | ✓ |
| Reliability | 0 | 0.07 | 0.0 | - |
Computed . Re-weight it by intent, or see the full method.
All data & sourcesshow ↓
Every value we hold, with its source, retrieval date, and confidence. This is the evidence behind the score: don't trust it, verify it.
Content
| Attribute | Value | Evidence |
|---|---|---|
| Faq | 6 items | mediumsource · 2026-09-10 · 60% |
Features
| Attribute | Value | Evidence |
|---|---|---|
| Capabilities | Open source: No · Pricing model: usage-based-compute · Batch processing: Yes · Deployment model: cloud-api-only · Real time latency: Yes · Custom model training: Yes | mediumsource · 2026-09-28 · 60% |
Integrations
| Attribute | Value | Evidence |
|---|---|---|
| Count | 2 | mediumsource · 2026-09-05 · 60% |
Market
| Attribute | Value | Evidence |
|---|---|---|
| Availability | PrimaryMarkets: … · AvailabilityScope: global · AvailableCountries: … · NotAvailableCountries: … | mediumsource · 2026-09-28 · 50% |
Pricing
Security
| Attribute | Value | Evidence |
|---|---|---|
| Disclosure policy | Yes | mediumsource · 2026-08-19 · 60% |
| Fedramp | Yes | highsource · 2026-09-28 · 75% |
| Gdpr | Yes | highsource · 2026-09-28 · 75% |
| Hipaa | Yes | highsource · 2026-09-28 · 75% |
| Pci | Yes | highsource · 2026-09-28 · 75% |
| Certifications | PCI DSS, HIPAA/HITECH, FedRAMP, GDPR, FIPS 140-3, NIST 800-171 | mediumsource · 2026-09-28 · 60% |
| Trust center | https://aws.amazon.com/compliance/ | mediumsource · 2026-09-28 · 60% |
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