Most popular Medium publications welcoming submissions

• The Mission with almost 500,000 subscribers. Here are the submission guidelines
• freeCodeCamp has almost 500,000 subscribers. Here’s how to post there
• Hacker Noon has more than 300,000 subscribers. Here’s how to submit your posts
• The Startup with more than 300,000 subscribers. Here’s how to submit your story
• Better Humans with more than 200,000 subscribers. Here’s how to write for them
• Think Growth with almost 200,000 subscribers. Here’s how to contribute
• UX Planet with 150,000 subscribers. Here’s how to publish
• Muzli with more than 100,000 subscribers. Here’s how to publish
• The Writing Cooperative with more than 100,000 subscribers. These are the submission requirements
• P.S. I Love You with 100,000 subscribers. There are the submission guidelines

Here’s a good Medium leaderboard if you’re looking for an easy way to find even more publications.