An interactive course platform that teaches programming like playing a game. Python, HTML, JS, SQL, and other courses are turned into an adventure with experience points, badges, and unlockable map areas; there are free intro chapters, and paid Club membership unlocks all courses, AI tutoring, mentor Q&A, and events.
Sonny Li, a forOne-line growth story, compiled by us from public sources; speculation is marked separately below.
Real payments synced by TrustMRR, in USD, by calendar month, renewals included.
New-user source: Social media (Organic social). Similarweb 2026-09: about 963K visits last month, direct 46.6%, organic search about 40%, social about 8% (YouTube, Pinterest, WhatsApp), about 2,000 search terms with brand keywords at about 80%; referral sites include python.org and Zhihu (zhihu.com). The founder launched on Product Hunt in 2022 and posted v1.0 again in 2025-08, there is also a private Discord (a comment says 38K members), and Hacker News posts appeared several times in 2022 to 2023. The founder did not fill in channels on TrustMRR.
Top channel measured by Similarweb, others estimated by rank
| Attributable new users, last month | Share |
|---|---|
| SEO | 8% |
| 8% | |
| Other | 84% |
Direct + brand search 79%. Direct and brand search count as viral only when the site shows sharing mechanics; the largest share wins, under 5% means Other.
| Country | Share of visits |
|---|---|
| India | 14.52% |
| United States | 14.47% |
| Brazil | 5.1% |
| China | 3.49% |
| Tunisia | 3% |
English
YouTube, Pinterest, WhatsApp; Messaging: WhatsApp
2K keywords · brand ~79% · organic 100% / paid 0%
| Similarweb top 5 keywords |
|---|
| codedex |
| codex |
| codedex io |
| codédex |
| coding |
Non-brand queries: coding
9 referring sites
| Site | Share of referrals |
|---|---|
| python.org | 0.92% |
| zhihu.com | 0.75% |
| 52it.de | 0.75% |
| Category | Share of referrals |
|---|---|
| Computers Electronics and Technology - Other | 44.16% |
| Programming and Developer Software | 3.3% |
| Search Engines | 0.75% |
About $75,597 last month (real payments synced by TrustMRR), #23 of 563 TrustMRR sites; the month before was $80,284.
New-user source: Social media (Organic social). New users mostly come from YouTube, X, Reddit, TikTok and the like Similarweb 2026-09: about 963K visits last month, direct 46.6%, organic search about 40%, social about 8% (YouTube, Pinterest, WhatsApp), about 2,000 search terms with brand keywords at about 80%; referral sites include python.org and Zhihu (zhihu.com). The founder launched on Product Hunt in 2022 and posted v1.0 again in 2025-08, there is also a private Discord (a comment says 38K members), and Hacker News posts appeared several times in 2022 to 2023. The founder did not fill in channels on TrustMRR.
Free version (250+ hours of interactive courses); Club membership from $9.99/month (TrustMRR); the official blog gives a standard price of $12.99/month, with country-adjusted local discounts; students can get 6 months free through the GitHub Student Pack (review site)
Dossier confidence: high. Parts 1 and 2 come from reading the site and Similarweb data; part 3 from public reporting, founder posts, Wayback snapshots, WHOIS and similar, with speculation marked.
The numbers: revenue comes from TrustMRR: real payments synced automatically from the founder's Stripe or other payment account, summed by calendar month, renewals included, in USD. Site visits come from the Similarweb public page; where it shows none, they are estimated from global rank or the TrustMRR payment count, as noted on the page.
Data through last month. Page updated 2026-10-31.
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