| Show HN: BiNeuron – Local, open-source alternative to ChatGPT Codex | ChatGPT Codex | AI assistants & models | 2 |
| Show HN: I made an alternative to the archived filebrowser | the | Other software | 4 |
| Show HN: OpenVurp – An open-source alternative to Grok Bot | Grok Bot | Other software | 1 |
| Show HN: OpenMuse – an Open Source alternative to Meta's personal agent | Meta's | Other software | 1 |
| Show HN: HolaOS––An Opensourced workspace that alternative to Claude | Claude | AI assistants & models | 4 |
| Show HN: OpenPost, an open-source alternative to Buffer, CapCut, and Canva | Buffer | Email & marketing | 4 |
| Show HN: Hound Media Server – Media Server Alternative to Plex+Stremio | Plex+Stremio | Other software | 4 |
| Show HN: Llama – Self-Hosted OSS Alternatives to Vercel and Supabase | Vercel | Hosting, PaaS & cloud | 3 |
| Show HN: Campsend – open-source Alternative to WeTransfer | WeTransfer | Other software | 3 |
| Show HN: I built a spatial graph alternative to the algorithmic feed | the | Other software | 1 |
| Show HN: A Replacement for Shortcutfoo | Shortcutfoo | Project management | 1 |
| Show HN: An open source alternative to Google's Critique | Google's Critique | Other software | 2 |
| Show HN: Branchline, a $15 alternative to GitLens Pro's commit graph | GitLens Pro's | Other software | 2 |
| Show HN: Free Alternative to OpenAI Computer Activity | OpenAI Computer Activity | AI assistants & models | 2 |
| Show HN: OpenMicroKbd: $40 open source alternative to Codex Micro Keyboard | Codex Micro Keyboard | Other software | 3 |
| Show HN: A local-first, modular replacement for your accounting software | your | Other software | 2 |
| Show HN: Node.JS in the Browser – An Open-source Alternative to WebContainers | WebContainers | Other software | 6 |
| Show HN: GetPageSpeed Amplify, a compatible replacement for Nginx Amplify | Nginx Amplify | Other software | 3 |
| Show HN: It's a Plan – a self-hosted, open-source alternative to Linear | Linear | Project management | 3 |
| Show HN: MPEdb - Drop in replacement for SQLite3 with concurrency support | SQLite3 | Other software | 3 |
| Show HN: KageOps – An open-source, local-first alternative to Devin | Devin | Other software | 6 |
| Show HN: PxlShot – Free Alternative to Cleanshot | Cleanshot | Other software | 1 |
| Show HN: PGP Manager – a modern, user-friendly alternative to Kleopatra | Kleopatra | Other software | 1 |
| Show HN:I built an open alternative to Simplify for autoapplying to LinkedIn job | Simplify | Other software | 5 |
| Show HN: I built an open source alternative to Workflowy | Workflowy | Other software | 4 |
| Show HN: BeePub – A reading-first alternative to Calibre-Web | Calibre-Web | Other software | 4 |
| Show HN: A possible open-source desktop alternative to OpenAI Codex | OpenAI Codex | AI assistants & models | 3 |
| Show HN: Agentic Alternative to Jupyter Notebook | Jupyter Notebook | Other software | 4 |
| Show HN: Open Science, open-source alternative to Claude Science | Claude Science | AI assistants & models | 8 |
| Show HN: BloomDisk – free open-source alternative to paid Mac disk analyzers | paid Mac | Team chat & meetings | 3 |
| Show HN: Daily Refreshed drop-in replacement for LiteLLM's model price map | LiteLLM's | Other software | 4 |
| Show HN: Devflow CMS – Hybrid CMS Alternative to Joomla, Drupal, and WordPress | Joomla | E-commerce & CMS | 1 |
| Show HN: A tree-based replacement for PowerPoint | PowerPoint | Other software | 1 |
| Show HN: The open-source alternative to Claude Tag | Claude Tag | AI assistants & models | 3 |
| Show HN: A directory of open source alternatives to proprietary software | proprietary | Other software | 2 |
| Show HN: Hikaru Labs – A private, 100% local alternative to iLoveIMG | iLoveIMG | Other software | 3 |
| Show HN: Hikaru Labs – An offline, client-side alternative to CloudConvert | CloudConvert | Other software | 3 |
| Show HN: Akasia – A libre, metric-compatible alternative to Aptos | Aptos | Other software | 2 |
| Show HN: A Good Alternative to Zendesk | Zendesk | Other software | 2 |
| Show HN: Pebble, an open-source alternative to Minecraft: Java Edition | Minecraft | Other software | 7 |
| Show HN: An Alternative to Selenium IDE | Selenium IDE | Other software | 1 |
| Show HN: Nudgra – Open-source, self-hostable alternative to ManyChat | ManyChat | Other software | 3 |
| Show HN: TabyAgent – A lighter and easier alternative to OpenClaw/Hermes | OpenClaw | Other software | 3 |
| Show HN: SupXML, modern memory-safe XML parser replacement for libxml2 | libxml2 | Other software | 3 |
| Show HN: Alternative to WebXR, TypeScript SDK for multi-user VR app development | WebXR | Other software | 2 |
| Show HN: RxCheck – Replacement for the discontinued NLM drug interaction API | the | Other software | 1 |
| Show HN: Open-source general-purpose alternative to Exa Websets | Exa Websets | Other software | 4 |
| Show HN: Postbase – 100% open source Alternative to Firebase and Supabase [video] | Firebase | Hosting, PaaS & cloud | 11 |
| Show HN: A free, open-source replacement for Evernote (and paid note takers) | Evernote | Notes, docs & productivity | 3 |
| Show HN: Open-source alternative to Codex Chronicle, using Apple's local OCR | Codex Chronicle | Other software | 2 |
| Show HN: Open-source alternative to Duolingo for learning anything | Duolingo | Other software | 7 |
| Show HN: Macfigure – Mac configuration in pkl. Simple alternative to Nix-Darwin | Nix-Darwin | Other software | 2 |
| Show HN: Onda – a cross-platform alternative to DSView for DSLogic analyzers [video] | DSView | Other software | 3 |
| Show HN: Pg_deltax, Apache-licensed alternative to TimescaleDB | TimescaleDB | Other software | 39 |
| Show HN: ChatbotX, an open-source alternative to ManyChat | ManyChat | Other software | 2 |
| Show HN: Mimik – open-source local-first alternative to Scribe and Tango | Scribe | Other software | 4 |
| Show HN: I built an open-source, local-first alternative to LangSmith | LangSmith | Other software | 6 |
| Show HN: Splitby v2.0.0 – a modern alternative to cut | cut | Other software | 2 |
| Show HN: Cryptick – free and open-source alternative to Minute Cryptic | Minute Cryptic | Other software | 5 |
| Show HN: Sortaballs – alternative modes for classic sort ball puzzle | | Other software | 1 |
| Show HN: People you know, an end-to-end encrypted private Instagram replacement | | Other software | 4 |
| Show HN: Draco – A single-binary, self-hostable Firecrawl alternative in Rust | | Other software | 15 |
| Show HN: A $25 DIY alternative to $159 AI voice recorders – BYOK or local | | Other software | 11 |
| Show HN: Kobra – a Shadcn alternative focused on design quality | | Other software | 2 |
| Show HN: Turn a Nintendo Joy-Con into a Codex Micro Alternative | | Other software | 2 |
| Show HN: Opencom – an open-source Intercom alternative given the Salesforce deal | | CRM & sales | 5 |
| Show HN: Masthead – A free, hosted, open source Hugo alternative | | Other software | 1 |
| Show HN: Mochi – a performance-first SveltKit alternative | | Other software | 5 |
| Show HN: SharpSkill – A LeetCode Alternative with real interview outcomes | | Other software | 5 |