Captchainbox vs CodeTrain

Set a price for unknown senders to reach your Gmail inbox. Trusted contacts get through normally, and you choose where 90% of the post-Stripe amount goes.

CodeTrain is a Socratic AI coding tutor: it asks questions, reviews what you write, and runs your tests, but never writes the code for you. Free to start.

About Captchainbox

Set a price for unknown senders to reach your Gmail inbox. Trusted contacts get through normally, and you choose where 90% of the post-Stripe amount goes. Captchainbox - Make unknown senders pay to reach you . We build a trusted contacts and accounts list for you. Unknown senders are held safely and receive a pay to deliver link. The sender pays the price you set and their message is delivered. Connect Stripe to pay yourself, or direct future proceeds to the Internet Archive or the Electronic Frontier Foundation.

About CodeTrain

CodeTrain is a Socratic AI coding tutor: it asks questions, reviews what you write, and runs your tests, but never writes the code for you. Free to start. Two steps, about a minute, and the first one is going to catch you. The tutor's replies are pre-recorded, so it knows the handful of ways this lesson usually goes wrong. The real one reads whatever you actually wrote, and it is free for ten lessons a month.