Codecademy delays signup until after the first lessons; cofounder reports 200,000 users in three days

Codecademy launched with signup held back until visitors finished their first few lessons, so people were writing code within seconds of arriving. Three days after launch, cofounder Zach Sims told TechCrunch the app had 200,000 unique users who had completed 2.1 million exercises. Sims credited ongoing growth mainly to badges shared on Twitter and Facebook, so the figures are not tied to the signup choice.

By Race to Scale Desk, edited by Lila Odinaev. Published 24 Oct 2026. How we work

What they ran

Codecademy, an interactive site for beginners learning to program, let visitors start lessons before creating an account. Signup appeared only after the first few lessons, so a visitor was typing code within seconds, per TechCrunch's launch report. Users earned badges for finished lessons and could share them to Twitter and Facebook. The team had worked on the project for about two weeks and was part of the latest Y Combinator batch.

What happened

Cofounder Zach Sims said the app drew 200,000 unique users in its first three days. Those users completed 2.1 million exercises in the same period. Sims said growth stayed strong, mostly from shared badges rather than press. In the Hacker News thread on the story, a commenter called the platform simple and encouraging for non-technical people. A team member posting as zds said ways to share examples were still coming.

What the account does not show

Both figures are the cofounder's own, relayed by a reporter. The source gives no baseline, so there is no comparison with a version that asked for signup up front. Sims credited badge sharing for continued growth, and the deferred-signup remark is the reporter's, so the account does not isolate the tactic. It does not say how many of those users went on to register. Numbers from the first three days of a two-week-old project say nothing about retention.

Questions

How did Codecademy handle signup at launch?

It showed the signup flow only after visitors finished their first few lessons, so they were writing code within seconds.

How many users did Codecademy get in its first days?

Cofounder Zach Sims said it drew 200,000 unique users in three days, and those users completed 2.1 million exercises.

Did deferring signup cause Codecademy's growth?

The source does not say so: Sims credited growth mainly to badges users shared on Twitter and Facebook, not to press.