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Best Copies — Reverse Engineer Anything, then prove it. The best copy of every app worth copying, ranked by copy score: steals here plus stars on GitHub. 74 targets · 63 copied · 78 copies · post yours · the toolkit · json Who copied which company best · companies with 2+ apps on the board company copied copied best by strongest single copy Adobe 8/8 storytold (best at 2, copied 7) Stirling-PDF for Adobe Acrobat · ★ 94k Microsoft 8/8 storytold (best at 2, copied 3) ReactOS for Windows · ★ 18k Google 5/5 nobody wins twice yet Supabase for Firebase · ★ 111k Atlassian 3/3 nobody wins twice yet Plane for Jira · ★ 61k Nintendo 3/3 nobody wins twice yet sm64 for Super Mario 64 · ★ 8.8k Salesforce 3/3 nobody wins twice yet Twenty for Salesforce · ★ 58k by category: Photo & design · Video & audio · Office & documents · Operating systems · CAD · Team & productivity · Business tools · Developer tools & AI · Social & chat · Media & storage · Games · Websites & UI classics Photo & design 5 of 5 copied Figma best Penpot ★ 61k · Clojure · open alternative Adobe Photoshop best PhotoCraft ★ 33k · Rust · clean-room rewrite also: GIMP ★ 6.5k, miniPaint ★ 3.5k Adobe Illustrator best Graphite ★ 28k · Rust · open alternative also: VectorCraft ★ 4.7k, Inkscape ★ 4k Adobe Lightroom best darktable ★ 13k · C · open alternative also: LightCraft ★ 7k Adobe InDesign best DesignCraft ★ 2k · Rust · clean-room rewrite also: Scribus ★ 635 Video & audio 5 of 5 copied Adobe Audition best Audacity ★ 19k · C++ · open alternative Adobe Premiere Pro best Shotcut ★ 15k · C++ · open alternative also: FilmCraft ★ 6.4k, Kdenlive ★ 5.8k FL Studio Image-Line best LMMS ★ 10k · C++ · open alternative Adobe After Effects best Natron ★ 5.6k · C++ · open alternative also: EffectCraft ★ 3.5k Avid Pro Tools best Ardour ★ 5.3k · C++ · open alternative also: SoundCraft ★ 777 Office & documents 7 of 7 copied Adobe Acrobat best Stirling-PDF ★ 94k · TypeScript · open alternative also: PDFCraft ★ 5.7k Notion best AppFlowy ★ 77k · Dart · open alternative also: AFFiNE ★ 73k Airtable best NocoDB ★ 65k · TypeScript · open alternative DocuSign best Documenso ★ 15k · TypeScript · open alternative Microsoft Word best LibreOffice ★ 4.5k · C++ · open alternative also: WordCraft ★ 1.3k Microsoft Excel best GridCraft ★ 882 · Rust · clean-room rewrite Microsoft PowerPoint best DeckCraft ★ 736 · Rust · clean-room rewrite Operating systems 2 of 2 copied Windows Microsoft best ReactOS ★ 18k · C · reverse engineered macOS Apple best Darling ★ 13k · Objective-C · reverse engineered CAD 2 of 2 copied SolidWorks / Fusion 360 best FreeCAD ★ 34k · C++ · open alternative AutoCAD Autodesk best LibreCAD ★ 6.5k · C++ · open alternative also: CADCraft ★ 1.1k Team & productivity 6 of 7 copied Jira Atlassian best Plane ★ 61k · TypeScript · open alternative Calendly booking page best Cal ★ 49k · TypeScript · open alternative Slack Salesforce best Mattermost ★ 39k · TypeScript · open alternative Loom Atlassian best Cap ★ 23k · Rust · open alternative Trello Atlassian best WeKan ★ 21k · JavaScript · open alternative Linear best Linear's landing page and ⌘K command menu, indexing every target and clone on this site 1 steal Superhuman nobody yet · be the first to copy it Business tools 5 of 5 copied Zapier best n8n ★ 207k · TypeScript · open alternative Salesforce best Twenty ★ 58k · TypeScript · open alternative Intercom best Chatwoot ★ 38k · Ruby · open alternative Google Analytics best Umami ★ 39k · TypeScript · open alternative also: Plausible ★ 29k Typeform best Formbricks ★ 13k · TypeScript · open alternative Developer tools & AI 6 of 7 copied Claude Code Anthropic best opencode ★ 212k · TypeScript · open alternative ChatGPT OpenAI best Open WebUI ★ 154k · Python · UI clone Firebase Google best Supabase ★ 111k · TypeScript · open alternative Postman best Hoppscotch ★ 81k · TypeScript · open alternative Vercel deployment screen best Coolify ★ 63k · PHP · open alternative Heroku Salesforce best Dokku ★ 32k · Go · open alternative Cursor Anysphere nobody yet · be the first to copy it Social & chat 4 of 4 copied Twitter / X X best Mastodon ★ 50k · Ruby · open alternative Reddit best Lemmy ★ 15k · Rust · open alternative Instagram Meta best Pixelfed ★ 7.1k · PHP · open alternative Discord best Spacebar ★ 2.2k · TypeScript · reverse engineered Media & storage 5 of 5 copied Google Photos best Immich ★ 116k · TypeScript · open alternative Plex best Jellyfin ★ 58k · C# · open alternative Spotify web player best Spotube ★ 50k · Dart · open alternative Google Drive best Nextcloud ★ 37k · PHP · open alternative YouTube Google best PeerTube ★ 15k · TypeScript · open alternative Games 10 of 11 copied Command & Conquer: Red Alert EA best OpenRA ★ 18k · C# · reimplemented engine RollerCoaster Tycoon 2 best OpenRCT2 ★ 16k · C++ · reverse engineered Age of Empires II Microsoft best openage ★ 14k · Python · reimplemented engine Minecraft Microsoft best Luanti ★ 14k · C++ · open alternative Diablo (1996) Microsoft best DevilutionX ★ 9.8k · C++ · reverse engineered Super Mario 64 Nintendo best sm64 ★ 8.8k · C · decompiled Transport Tycoon Deluxe best OpenTTD ★ 8.3k · C++ · reverse engineered The Elder Scrolls III: Morrowind Microsoft best OpenMW ★ 6.6k · C++ · reimplemented engine Zelda: Ocarina of Time Nintendo best zeldaret/oot ★ 5.6k · C · decompiled Pokémon Red/Blue Nintendo best pokered ★ 5k · Assembly · decompiled Wordle The New York Times nobody yet · be the first to copy it Websites & UI classics 6 of 14 copied GitHub Trending best I copied GitHub Trending, but it lists the repos our pipeline says are going viral 1 steal Product Hunt best Product Hunt home page, white version, fed by the Product Hunt feed 1 steal YC Startup Directory best The YC Startup Directory, with the real latest batches, search and batch filters that work 1 steal HackerRank best HackerRank problem page with a working editor. The problem is "Copy Me First" 1 steal Stripe Checkout best Stripe Checkout, pixel-ish perfect, and it charges $0.00 for a lifetime license to copy 1 steal Google best The Google homepage, and the search actually searches the whole catalog 1 steal Hacker News nobody yet · be the first to copy it Craigslist nobody yet · be the first to copy it Airbnb listing page nobody yet · be the first to copy it TrustMRR nobody yet · be the first to copy it Apple product page nobody yet · be the first to copy it Excalidraw nobody yet · be the first to copy it Duolingo lesson nobody yet · be the first to copy it Gumroad product page nobody yet · be the first to copy it

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