> ## Documentation Index
> Fetch the complete documentation index at: https://docs.context.dev/llms.txt
> Use this file to discover all available pages before exploring further.

# Introduction

> How Context.dev classifies brands by industry — choose between EIC, NAICS, and SIC

## Overview

Context.dev supports three industry taxonomies:

* **EIC (Easy Industry Classification)** — Context.dev's own taxonomy, optimized for modern digital businesses (SaaS, fintech, creator economy, etc.). Returned **inline** on the full Brand response under `industries.eic`. (Not included on the simplified Brand response, which only returns logos, colors, and backdrops.)
* **NAICS (North American Industry Classification System)** — The 2022 NAICS taxonomy from the US Census Bureau. Available via a **dedicated endpoint** ([`GET /web/naics`](/api-reference/industry-classification/retrieve-naics-code-for-any-brand)) — call it when you need NAICS codes for a domain or brand name.
* **SIC (Standard Industrial Classification)** — The 1987 SIC taxonomy and the SEC EDGAR SIC list. Available via a **dedicated endpoint** ([`GET /web/sic`](/api-reference/industry-classification/classify-sic-industries)) with a `type` parameter to choose between the two datasets.

EIC is generally a better fit for product categorization, segmentation, and routing. NAICS is the right choice for modern regulatory, compliance, or financial reporting systems. SIC remains useful for SEC filings, historical datasets, and any system that hasn't migrated to NAICS.

<Note>
  EIC is included in any Brand response (no extra call needed). NAICS and SIC are separate, opt-in endpoints with their own pricing — call them when you specifically need those codes.
</Note>

## Choosing between EIC, NAICS, and SIC

| Use case                                               | Recommended taxonomy               |
| ------------------------------------------------------ | ---------------------------------- |
| Product segmentation, routing, marketing audiences     | **EIC** (free with any Brand call) |
| Modern digital business types (SaaS, fintech, creator) | **EIC**                            |
| Regulatory or compliance reporting                     | **NAICS**                          |
| Financial filings, government data integration         | **NAICS**                          |
| Matching SEC EDGAR filings or review offices           | **SIC** (`type=latest_sec`)        |
| Historical datasets that pre-date NAICS (pre-1997)     | **SIC** (`type=original_sic`)      |
| Aligning with existing CRM industry fields             | Match what your CRM already uses   |

You can use any combination: hit a Brand endpoint to get EIC inline, and call `/web/naics` or `/web/sic` separately when a record needs those codes.

## Continue reading

<CardGroup cols={2}>
  <Card title="EIC — Easy Industry Classification" icon="layer-group" href="/guides/use-cases/industry-classification/eic">
    Context.dev's own taxonomy. 24 industries, 220 subindustries, returned inline on every Brand response.
  </Card>

  <Card title="NAICS Classification" icon="industry" href="/guides/use-cases/industry-classification/naics">
    The 2022 NAICS taxonomy. 1,012 six-digit codes, available through a dedicated endpoint.
  </Card>

  <Card title="SIC Classification" icon="building-columns" href="/guides/use-cases/industry-classification/sic">
    The 1987 SIC and SEC EDGAR SIC lists. 1,004 original codes plus 430 SEC codes tagged with review office.
  </Card>
</CardGroup>

## Related

<CardGroup cols={2}>
  <Card title="Brand API" icon="globe" href="/api-reference/retrieve-brand/retrieve-brand-data-by-domain">
    Full Brand response shape, including `industries.eic`.
  </Card>

  <Card title="NAICS Classification API" icon="industry" href="/api-reference/industry-classification/retrieve-naics-code-for-any-brand">
    Endpoint reference for `GET /web/naics`.
  </Card>

  <Card title="SIC Classification API" icon="building-columns" href="/api-reference/industry-classification/classify-sic-industries">
    Endpoint reference for `GET /web/sic`.
  </Card>

  <Card title="Lead Enrichment" icon="user-plus" href="/guides/use-cases/lead-enrichment">
    Using industry data to segment enriched leads.
  </Card>

  <Card title="Transaction Categorization" icon="receipt" href="/guides/use-cases/transaction-categorization">
    Using industry context to improve brand identification on transactions.
  </Card>
</CardGroup>