14 real, live products built with OpenAI's coding agent, picked from our catalogue: why each one matters and what you can copy.
Codex is OpenAI's coding agent: you give it a goal, like building a feature or fixing a failing test, and it works through the code on its own.[1] MissumAI lists 27 live products whose own sources say Codex was part of the build. These are the 14 we think teach the most, grouped by what you can learn from them.
How we picked: every product is live and has a first-hand account of Codex being used (a founder interview, essay or the founder's own post). Most builders here use Codex next to another tool, usually Claude Code or Cursor, and we say so on each card. We left out entries where we couldn't re-confirm the Codex part today. Each card shows the product's current rank on the main leaderboard, which is rebuilt every day, and every fact links to its source. Founder figures without independent proof are labelled self-reported.
These four connect their payment provider to TrustMRR, which reads the numbers straight from Stripe or Lemon Squeezy, so anyone can look them up.[2][5][7][9]
AI screenwriting software for Chinese short dramas, from outline to full script.
Zhao Chunxiang spent years as a screenwriter before he wrote code. In late July 2025 he started an AI script editor as a side project, "pure vibe coding" to clear his head, and coded through the night until 5 a.m.[3] In a June 2026 report, as translated by Shipped & Paid, he says the two-person team commits code about 200 times a week and ships about 20 releases, with Claude Code and Codex doing all of the coding; his partner uses Codex for growth spreadsheets and admin tools.[4] TrustMRR now shows close to $49,000 in monthly recurring revenue from about 1,500 subscriptions.[2]
AI speech-to-text that works in Gmail, Docs, Slack and thousands of other apps.
Kourosh built a speech-to-text extension for his dad, then grew it into a side business.[6] He pays for both Cursor and Codex, and he goes to Cursor when he wants Anthropic's Opus models.[6]
“I pay for Codex because it's a beast and it's a lot of bang for your buck”
Kourosh on Starter Story (auto transcript)[6]TrustMRR shows about $12,500 in MRR.[5]
Live SEO data and your saved bookmarks inside Claude, Cursor and Codex, via MCP.
David, a growth marketer in Scotland, makes SEO and bookmark tools you use from inside AI assistants.[8][7]
“AI built the product. Most of my work runs through Claude Code or Codex”
David on 99helpers[8]He also uses AI for his social posts, graphics and content, and built his own analytics dashboard with it.[8] Small but real: TrustMRR shows just under $900 in MRR from 62 subscriptions.[7]
A script-to-video AI studio: storyboard, shots, video, dialogue and music from one screenplay.
Sanket Dongre ships several products and splits them by tool in public: Frameliq, his AI video story tool, is on his "mostly built with Codex" list, while three others are on his "mostly built with Claude Code" list.[10] TrustMRR shows about $455 in MRR from 19 subscriptions.[9]
The open-source personal AI agent that took over the internet in early 2026.
Peter Steinberger, who founded PSPDFKit, built OpenClaw by running several agents at once. He spends a long time going back and forth with an agent on a plan, then lets it run, and he prefers Codex for that part.[11] The Pragmatic Engineer sums up his reason: Codex goes off and does long-running tasks, while Claude Code comes back for clarifications, which he finds distracting once the plan is set.[11] In the same interview he says he ships code he doesn't read line by line.[11]
An offline-first budget tracker for iOS and Android, built in a weekend with Codex.
Bryl Lim built Tarsi, a budget tracker, as a demo for a university talk about vibe coding. It was vibe coded in a weekend with Codex on top of a React Native template.[12] He made it a paid app (no subscription paywall), which put it on the much emptier paid charts: he says about $20K in its first month and #1 on the paid charts in several countries.[12] (It switched to free with an optional Pro upgrade in September 2026; see Steal this idea: Tarsi's paid-upfront launch.) Feature requests come from a Facebook group; he keeps them in Apple Notes and uses Codex to build them fast.[12]
A private, end-to-end encrypted photo vault for iPhone with no account needed.
Rasty Turek sold his company Pex in 2025, then started testing how far coding agents could take a solo developer. One morning he wrote a detailed product spec, handed it to the agents, built the first version of his first iPhone app in about three weeks and launched in March.[13] He says he uses Codex and Claude extensively.[14] The hard part wasn't the code but Apple: his very first submission was rejected for a missing Terms of Use link.[13] He reports $41,425 in gross App Store sales in August.[13]
A dating app for active singles, with sport-first profiles and local run clubs to meet in person.
Adel Benzehda is a designer who says he still doesn't know how to code; Ritmo is his first app.[17] His RevenueCat Shipaton entry lists Codex and Rork among its tools, and it won third place for the HAMM award.[16] He posted $800 MRR on October 1 and $2,618 on October 14;[17] TrustMRR now shows over $6,600, RevenueCat-verified.[15] The full story: how Ritmo was built.
An AI video editing agent that turns long videos into short clips for creators and brands.
Vadim Strizheus is 19 and had never shipped an app. He spent about four months prompting Lovable, then asked Claude how to move off it and learned to build the product himself.[18] Today his list of tools starts with Codex, then GitHub, Supabase, Vercel, Cloudflare and PostHog.[18]
An AI money manager: connect your accounts, track budgets, subscriptions and net worth, and ask your money anything.
Junead Khan, 25, left Microsoft to build Treasury on his own, with no cofounder and no venture funding.[19] A few years earlier, he says, he might have needed a cofounder to build the product.
“Claude Code and Codex allow me to code so much faster.”
A clear plan first, then a long hand-off. Steinberger plans with the agent before he lets it run,[11] Turek started from a written spec,[13] and Bryl works from a list of requests in Apple Notes.[12]
Plenty of them aren't programmers. A screenwriter,[3] a designer,[17] a 19-year-old who started on Lovable[18] and a self-described newbie[20] all shipped.
Lessons for your own build
01
Write the plan before you press go
Steinberger argues with the agent about the plan first, then hands it off;[11] Turek's app still looks a lot like his first spec.[13]
02
Let your users write the to-do list
Tarsi's Facebook group posts requests, Bryl notes them and Codex builds them fast.[12]
03
Look at the paid charts
Bryl charged upfront because it was simpler than a paywall, and found far less competition there.[12]
04
Budget time for the App Store, not just the code
Turek says the biggest challenge wasn't writing the code but working inside Apple's rules and review times.[13]
05
Use two agents if it helps
Kourosh pays for Codex and still opens Cursor for Opus;[6] Sanket picks Codex or Claude Code per product.[10]
