# Let's Encrypt / ISRG
> The Internet Security Research Group (ISRG) is a non-profit organization that provides the Let's Encrypt certificate authority. Its mission is to reduce financial, technological, and education barriers to secure communication over the Internet by providing free, automated, and open security services.
- URL: https://optimly.ai/brand/lets-encrypt-isrg
- Slug: lets-encrypt-isrg
- BAI Score: 92/100
- Archetype: Challenger
- Category: Cybersecurity and Internet Infrastructure
- Last Analyzed: April 11, 2026
## Competitors
- DigiCert (https://optimly.ai/brand/digicert)
- Sectigo (https://optimly.ai/brand/sectigo)
- Zerossl (https://optimly.ai/brand/zerossl)
## AI-Suggested Alternatives
- Commercial Certificate Authorities (https://optimly.ai/brand/commercial-certificate-authorities)
- Self Signed Certificates (https://optimly.ai/brand/self-signed-certificates)
## Sub-brands
- Lets Encrypt (https://optimly.ai/brand/lets-encrypt)
## Buyer Intent Signals
Problems: Self-Signed Certificates: Using self-signed certificates which do not provide browser trust. | No Encryption: Allowing site security to lapse or using unencrypted HTTP.
Solutions: free ssl certificates | how to automate certificate renewal | what is the ACME protocol | privacy preserving measurement tools | non-profit internet security organizations | Commercial Certificate Authorities: Buying commercial SSL/TLS certificates from traditional providers.