# Let's Encrypt (ISRG)

> Publicly sourced profile assembled by Optimly, in the Optimly AI Brand Index. Last refreshed 2026-10-04.

- **Business Profile:** https://optimly.ai/brand/let-s-encrypt-isrg
- **Dataset:** https://optimly.ai/brand/let-s-encrypt-isrg.json
- **Markdown:** https://optimly.ai/brand/let-s-encrypt-isrg/llms.txt
- **Official website:** https://letsencrypt.org
- **Slug:** let-s-encrypt-isrg
- **Categories:** cybersecurity, developer-tools, web-hosting-domains

## Overview

- **Tagline:** It is the only major non-profit, completely free, and fully automated global certificate authority.
Source: Brand's website (https://letsencrypt.org) · 2026-10-04

- **Description:** Let's Encrypt is a non-profit certificate authority (CA) that provides X.509 certificates for Transport Layer Security (TLS) encryption at no charge. It is the world's largest certificate authority, aiming to create a more secure and privacy-respecting Web by making it possible to adopt HTTPS easily and automatically.
Source: Brand's website (https://letsencrypt.org) · 2026-10-04

## Offerings

- **Core capabilities:**
  - Domain Validated (DV) SSL/TLS Certificates
  - ACME Protocol implementation
Source: Brand's website (https://letsencrypt.org) · 2026-10-04

- **Pricing:** Free
Source: Brand's website (https://letsencrypt.org) · 2026-10-04

## Audience

- **Target industry:** Website owners, hosting providers, developers, and enterprises seeking automated web security.
Source: Brand's website (https://letsencrypt.org) · 2026-10-04

## Landscape

- **Competitors:**
  - DigiCert
  - Cloudflare SSL/TLS
  - Sectigo (formerly Comodo)
  - ZeroSSL
Source: Brand's website (https://letsencrypt.org) · 2026-10-04

Page last updated 2026-10-17.