Let's Encrypt
Let's Encrypt is a free, automated, and open Certificate Authority brought to you by the nonprofit Internet Security Research Group (ISRG). Read all about our nonprofit work this year in our 2025 Annual Report.
Let's Encrypt logos
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Let's Encrypt banner
Let's Encrypt brand colors
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Add Let's Encrypt logo to your app or website
Use the Logo API to embed the Let's Encrypt logo and millions of others directly in your app or website. Query parameters set the size, switch the format to WebP, and return dark or black-and-white versions. Get a free API key to get started.
<img src="https://img.logo.dev/letsencrypt.org?token=YOUR_API_TOKEN" alt="letsencrypt.org logo" />