What are the best AI content classification tools for enterprises with 1,000-10,000 employees?

It depends on what you are classifying. As of October 21, 2026: for sensitivity labels across Microsoft 365, Microsoft Purview (per-user E3/E5 licences plus pay-as-you-go meters for on-demand classification and non-Microsoft sources); for sensitive data in AWS S3, Amazon Macie ($1 per GB inspected after 1 GB free, $0.10 per bucket a month); for Google Cloud data, Sensitive Data Protection discovery at $0.03 per GB profiled; for sorting incoming documents by type, Azure Document Intelligence's custom classifier ($3 per 1,000 pages), Google Document AI's custom classifier ($5 per 1,000 pages, $3 above one million) or Reducto Classify ($7.50 per 1,000 pages).

What is the difference between data classification and document classification?

Data classification finds and labels sensitive content (personal data, payment data, secrets, confidential projects) so security and retention policies can apply. Document classification sorts documents by type (invoice, contract, claim, ID) so each goes to the right extraction model or workflow. Mid-size companies usually need both and buy them from different products.

How much does AI content classification cost for a mid-size company?

For 100,000 incoming pages a month, document-type classification costs about $300 on Azure, $500 on Google Document AI and $750 on Reducto at list price. For data at rest, scanning 10 TB in S3 with Macie targeted discovery costs about $10,000 per full pass at $1 per GB, which is why Macie's automated discovery samples objects instead of reading everything; Google's discovery profiling of 10 TB is about $300.

Do I need Microsoft E5 for Purview classification?

Automatic sensitivity labelling and advanced classifiers for Microsoft 365 content are licensed per user through Microsoft 365 E5 or the E5 Compliance add-on. Microsoft's pay-as-you-go billing extends Purview to non-Microsoft 365 sources and adds on-demand classification of existing SharePoint and OneDrive files, billed per asset scanned, with in-product cost estimates before a scan.

Quick Answer

AI Content Classification Tools for 1,000–10,000 Employees

Published: October 21, 2026

The short answer

Classify by job: one tool for sensitive data at rest, one for routing incoming documents. For a company of 1,000 to 10,000 people, the right choice follows your cloud and productivity suite. As of October 21, 2026:

Microsoft Purview — sensitivity labels and DLP across Microsoft 365, Windows and macOS; the default for Microsoft shops.
Amazon Macie — sensitive-data discovery in S3.
Google Sensitive Data Protection — discovery and inspection across BigQuery, Cloud SQL and Cloud Storage.
Azure Document Intelligence / Google Document AI custom classifiers — route incoming documents by type at $3–$5 per 1,000 pages.
Reducto Classify — classification inside a parse-and-extract pipeline for messy documents.

The comparison

Tool	Classifies	Price (list, Oct 21, 2026)	Best fit
Microsoft Purview	Sensitive info types, trainable classifiers, sensitivity labels	Per-user E3/E5 licences; pay-as-you-go meters per asset scanned for on-demand classification and non-M365 sources	Microsoft 365 estates
Amazon Macie	PII, financial data, credentials in S3	$0.10 per bucket/month · $0.01 per 100K objects monitored · $1 per GB inspected (1 GB free for automated discovery) · 30-day trial	AWS data lakes
Google Sensitive Data Protection	PII and custom infoTypes in GCP data	Discovery $0.03 per GB profiled (BigQuery capped at 3 TB per table) or $2,500 per subscription unit; inspection billed per GB	Google Cloud data
Azure Document Intelligence	Document type (custom classifier)	$3 per 1,000 pages	Incoming mail and forms, Microsoft
Google Document AI	Document type (custom classifier and splitter)	$5 per 1,000 pages ($3 above 1M)	Incoming documents, Google
Reducto Classify	Document type (first 5 pages)	$7.50 per 1,000 pages · Deep Classify $15	Messy scans, then extraction
Amazon Comprehend custom classification	Text categories	Async $0.0005 per 100-character unit; real-time endpoints $0.0005 per second per inference unit; training $3/hour	Free-text tickets and emails on AWS

Which tool for which job

Labelling sensitive content in Microsoft 365. Purview is already in most E5 estates. Microsoft’s billing documentation describes two complementary models: per-user licensing for Microsoft 365 and endpoints, and pay-as-you-go meters that extend classification to non-Microsoft sources and to on-demand scans of SharePoint and OneDrive files that were never classified. Run the in-product cost estimate before a large on-demand scan.

Finding personal data in cloud storage. Macie and Google Sensitive Data Protection both separate cheap profiling (which tables or buckets probably hold sensitive data) from expensive inspection (reading the bytes). Use profiling everywhere, then targeted inspection on what it flags. On AWS, Macie’s own example shows a 150 GB account costing about $151.50 a month for automated discovery.

Routing incoming documents. If documents arrive as scans or PDFs (claims, invoices, HR forms), a document classifier in front of extraction saves money: only the right pages go to the expensive extraction model. Azure ($3 per 1,000 pages) is cheapest at list; Google’s classifier also splits multi-document PDFs; Reducto Classify is the natural choice if Reducto already extracts the fields.

Categorising text (emails, tickets, chat). Comprehend custom classification on AWS, or an LLM prompt with a fixed label set. For an LLM approach, a small model such as Claude Haiku 5.5 or GPT-6 Luna (both $0.10 per million input tokens; see current API prices) is usually cheaper than a hosted classifier at mid-size volume.

How to choose

List your three classification jobs (sensitive data, document routing, text categories) — few companies need all three on day one.
Use the platform you already license for sensitive data: Purview for Microsoft, Macie for AWS, Sensitive Data Protection for Google.
Test document classifiers on 300 real documents across your top ten types; measure accuracy and how many land in “unknown”.
Budget profiling, not full inspection, for data at rest.

Last verified: October 21, 2026.

The short answer

The comparison

Which tool for which job

How to choose

Sources