Directory

Companies tracked by Rails Radar

Hiring signals with observed stack evidence. Showing 289–336 of 1375 · page 7 of 29.

• Constraint Programming in Your AI Agent 0 open listings

  discussion=https://news.ycombinator.com/item?id=49715171, title=Show HN: Constraint Programming in Your AI Agent

• Context Freshness Ledger 0 open listings

  discussion=https://news.ycombinator.com/item?id=49721941, title=Show HN: Context Freshness Ledger – a tiny schema for reviewable agent memory

• Control Claude Code from your Tesla's screen 0 open listings

  discussion=https://news.ycombinator.com/item?id=49709438, title=Show HN: Control Claude Code from your Tesla's screen, You can now screen share your Mac and control Claude Code on the Tesla screen. I found myself sometimes running Claude Code on my laptop in the passenger seat and thought "I would love to see it on my screen also". This lead to me building this Tesla screen sharing thing, that works super nicely with Claude Code. There is also a button on the screen to toggle voice mode so that you can control it with voice. Would be super to get people to test it and tell me if it is useful or not. I use it every day, but definitely biased! Happy to answer any questions!

• Copperhead 0 open listings

  discussion=https://news.ycombinator.com/item?id=49610059, title=Show HN: Copperhead – Hardware as Fast as Software

• CopyWheel 0 open listings

  discussion=https://news.ycombinator.com/item?id=49623741, title=Show HN: CopyWheel – a radial snippet menu for macOS (native, 1 MB)

• CostClaw, a local audit of your Claude Code logs 0 open listings

  discussion=https://news.ycombinator.com/item?id=49700895, title=Show HN: CostClaw, a local audit of your Claude Code logs

• Cosuno Hiring 2 open listings

  url=https://weworkremotely.com/remote-jobs/cosuno-senior-full-stack-developer-typescript, title=Senior Full Stack Developer (TypeScript)

• Coulomb AI Hiring 1 open listing

  employer=Coulomb AI, profile=https://www.ycombinator.com/companies/coulomb-ai, article=https://thoughtbot.com/blog/48-companies-you-didn-t-know-were-using-rails-in-2026, source=https://www.ycombinator.com/, ruby_jobs=1, titles=Senior Data Scientist

• Credit against tokenised stocks for agents. punish us please 0 open listings

  discussion=https://news.ycombinator.com/item?id=49688089, title=Show HN: Credit against tokenised stocks for agents. punish us please, we are launching credit against tokenised stocks for your agents. Your agents can buy stocks and borrow credit line for your agents against it. This is another step in becoming treasury for agents which allows agents to invest, buy, trade, and sell without any human intervention. Please give us a try and give honest and brutal feedback. punish me for being stupid and bold.

• CreepyLink: A fun tool to turn safe URLs into suspicious looking links 0 open listings

  discussion=https://news.ycombinator.com/item?id=49623497, title=Show HN: CreepyLink: A fun tool to turn safe URLs into suspicious looking links

• Cross-platform computer use MCP server built in Rust 0 open listings

  discussion=https://news.ycombinator.com/item?id=49633155, title=Show HN: Cross-platform computer use MCP server built in Rust

• Crossposter 0 open listings

  discussion=https://news.ycombinator.com/item?id=49612502, title=Show HN: Crossposter – open-source browser extension for social media posting

• Crypto portfolio risk and scenario analysis with AI agents on top 0 open listings

  discussion=https://news.ycombinator.com/item?id=49694118, title=Show HN: Crypto portfolio risk and scenario analysis with AI agents on top, Sentralis.io is a risk and scenario analysis platform focused on cryptocurrency portfolio HODLers It combines hardcore risk analytics capabilities with smart agents for deep insights, suitable for beginners and pros alike. Free accounts have full access to all scenarios and risk quantification. API and MCP access available as well

• Cse-bridge, a drop-in for Google's Custom Search API (off Jan 2027) 0 open listings

  discussion=https://news.ycombinator.com/item?id=49682432, title=Show HN: Cse-bridge, a drop-in for Google's Custom Search API (off Jan 2027)

• Csirac emulator with Interprogram 0 open listings

  discussion=https://news.ycombinator.com/item?id=49631001, title=Show HN: Csirac emulator with Interprogram – first .au computer & language

• Ctrlb-decompose: Strip the noise from logs before sending to LLMs 0 open listings

  discussion=https://news.ycombinator.com/item?id=49625553, title=Show HN: Ctrlb-decompose: Strip the noise from logs before sending to LLMs

• Ctxwitch 0 open listings

  discussion=https://news.ycombinator.com/item?id=49727366, title=Show HN: Ctxwitch – Git tells you what changed; this tells you what it'll do

• CuTile for Java Port 0 open listings

  discussion=https://news.ycombinator.com/item?id=49658406, title=Show HN: CuTile for Java Port

• Cubespotting 0 open listings

  discussion=https://news.ycombinator.com/item?id=49711063, title=Show HN: Cubespotting – A New Way to Learn

• Curri Hiring 1 open listing

  employer=Curri, profile=https://www.ycombinator.com/companies/curri, article=https://thoughtbot.com/blog/48-companies-you-didn-t-know-were-using-rails-in-2026, source=https://www.ycombinator.com/, ruby_jobs=1, titles=Staff Software Engineer

• Custom slash commands, variables and snippets 0 open listings

  discussion=https://news.ycombinator.com/item?id=49736457, title=Show HN: Custom slash commands, variables and snippets, Create custom slash commands to instantly insert text, snippets, variables, and more on any website.

• Cynative 0 open listings

  discussion=https://news.ycombinator.com/item?id=49627393, title=Show HN: Cynative – build your own security agents, In July, we launched a deep research agent for live infrastructure. Following feedback from the cybersecurity community, we built a framework on top of it to enable anyone to build their own security agents quickly and safely. We're excited to share our work and would like to thank everyone who helped us.

• DER DIE DAS 0 open listings

  discussion=https://news.ycombinator.com/item?id=49724264, title=Show HN: DER DIE DAS – learn German noun gender with spaced repetition and games, I built this app for my language buddy who is learning German (while he teaches me Chinese). He struggled so much with German articles/determiners. So I made this, it also teaches article changes and noun declensions. There is spaced repetition, audio loops, multi-player games, some cultural lessons and more. It would be nice to get some feedback from German learners!

• DNSMint 0 open listings

  discussion=https://news.ycombinator.com/item?id=49699572, title=Show HN: DNSMint – Give a sandbox its own domain and HTTPS cert in one API call

• Daemon OS 0 open listings

  discussion=https://news.ycombinator.com/item?id=49707171, title=Show HN: Daemon OS – An intelligence layer for infrastructure

• DaiDocs, AI memory as a plain-text file format, not a service 0 open listings

  discussion=https://news.ycombinator.com/item?id=49715672, title=Show HN: DaiDocs, AI memory as a plain-text file format, not a service

• Dash. 0 open listings

  discussion=https://news.ycombinator.com/item?id=49660146, title=Show HN: Dash. – Tech, Startups, and Markets

• Datadog Hiring 1 open listing

• Day week calendar app inspired by the French Revolutionary calendar 0 open listings

  discussion=https://news.ycombinator.com/item?id=49706982, title=Show HN: Day week calendar app inspired by the French Revolutionary calendar

• Dbmask 0 open listings

  discussion=https://news.ycombinator.com/item?id=49645189, title=Show HN: Dbmask – Discover, mask, and verify sensitive data in SQL databases, Hi HN I developed *dbmask*, an open-source Python tool designed to discover sensitive columns in SQL databases, masking them with deterministic fake values, and validate the masking results. The motivation behind this tool stems from a common issue I encountered when handling test data: existing masking tools often assume the user already knows exactly which columns contain sensitive information. Furthermore, the successful completion of a masking task does not guarantee that all sensitive values have actually been replaced. dbmask aims to integrate these steps into a unified workflow rather than treating them as three separate tasks. During the detection phase, the tool makes determinations by combining column names, sampled values, database type/context, historical decisions, and optionally LLMs. While LLM functionality is disabled by default, it supports local execution via Ollama or other services compatible with the OpenAI API. If the tool cannot determine a column's nature with confidence, it marks it as `UNKNOWN` rather than simply classifying uncertain cases as "non-sensitive." I also wanted to incorporate human decision-making into the system. Detection results can be exported for manual review, and confirmed decisions can be saved in CSV, XLSX, or Markdown formats, or stored in a SQL history decision table. The system logs information about both the analyst and the reviewer and re-evaluates past decisions if column types change or review results expire. The masking process employs deterministic mapping, ensuring that identical original values consistently map to the same synthetic values across different tables. Once masking is complete, the `dbmask validate --strict` command compares the masked copy with the original data, checking row counts and table structures, and verifying sensitive values row-by-row using primary keys wherever possible. The project is currently in its early stages (version 0.1.x). The current CI (Continuous Integration) pipeline covers SQLite testing; integration tests for PostgreSQL and MySQL, as well as public detection benchmarks, are included in the future development roadmap. I would particularly appreciate feedback on the detection rules, the manual review/history tracking workflows, and the verification methods. Please let me know if you encounter any usability issues or potential security risks while testing on the temporary database. Install: pip install dbmask

• DeadLock OS 0 open listings

  discussion=https://news.ycombinator.com/item?id=49719247, title=Show HN: DeadLock OS – A Linux terminal puzzle game

• Deall 0 open listings

  discussion=https://news.ycombinator.com/item?id=49656611, title=Show HN: Deall – Automated proof of income for F-1/J-1 students

• DearAgent 0 open listings

  discussion=https://news.ycombinator.com/item?id=49661080, title=Show HN: DearAgent – Open-source email inboxes for AI agents

• Decode, encode, listen, and speak to learn a language 0 open listings

  discussion=https://news.ycombinator.com/item?id=49609509, title=Show HN: Decode, encode, listen, and speak to learn a language, Hey HN.I love learning languages and I have tried several language learning apps over the last few years, but I didn’t like any of them because they were either expensive ($20-$50/month) or weren’t very effective.I was using Duolingo, for example, because it was free, but it was slow and ineffective. Even after having ~150 day streak, I still couldn’t say much in Spanish. I was either passively listening to the language, learning vocabulary without context, or learning sentences that weren’t realistic. So I set out to build my own.I have tried different approaches and techniques over the last 1.5 years for learning a language, and finally found something that works well. This web app uses a 4-step system of decoding, encoding, listening, and speaking.1. Decoding: You are given a sentence in your target language (e.g., French) and have to unscramble the English words to figure out what it means.2. Encoding: The exact opposite of step one—translating the active thoughts from English back into your target language.3. Listening: You listen to the native audio of the sentence and type out the English translation.4. Speaking: You hit the record button and actually practice speaking the sentence out loud from day one.I have been using this app for a while now, and it has been helping me learn French far more effectively than my previous approach. It gets me speaking the language from day one, I learn vocabulary and grammar through context, and I learn phrases and sentences that are practical and realistic.I am excited to finally launch it and get it into the hands of other language learners. I would love to hear any feedback you have on the method or the app itself!I’m currently running a free private beta. If you want to test it out and help me improve it, you can test the 4 steps in the website demo or sign up for free here: https://www.4tospeak.comCaleb

• DeepMem·hybrid-retrieval memory for AI Agents 0 open listings

  discussion=https://news.ycombinator.com/item?id=49612293, title=Show HN: DeepMem·hybrid-retrieval memory for AI Agents – Vector+BM25+Time-Decay

• Deeplearning from Scratch in 1400 Lines In my own Programming Language 0 open listings

  discussion=https://news.ycombinator.com/item?id=49684291, title=Show HN: Deeplearning from Scratch in 1400 Lines In my own Programming Language

• Deiko 0 open listings

  discussion=https://news.ycombinator.com/item?id=49731089, title=Show HN: Deiko – point at your screen, talk, and hand the brief to your agent, macOS, 0.4.5, free to try: curl -fsSL https://deiko.app/install.sh | sh I kept losing time explaining my own screen to Claude Code. Screenshot, crop, paste, then type three paragraphs describing which dropdown I meant. The context was all right in front of me and I was transcribing it by hand. Deiko: double-tap Right Option, and it listens while following your cursor. Hover what you mean while you talk — "this dropdown closes when I scroll, keep it open". Each thing you point at gets cropped and labelled. Tap Option to stop, and you get a brief plus the screenshots, which you drag into whatever agent you use. Works with two languages mixed in one sentence, which is how I actually talk. Screenshots and briefs never leave the Mac. Audio is transcribed then deleted; first 30 minutes use cloud transcription, after that it runs on-device forever. Things you should know before installing: - It's signed with a self-signed cert, not an Apple Developer ID, because I haven't paid the $99. That's why there's an install script: macOS quarantines the bundle, and the GUI "Open Anyway" misses the Node runtime nested inside, which then fails silently minutes later mid-transcription. The script is one `xattr -dr com.apple.quarantine` and a copy to /Applications. Read it first, it's short. - The bundle is ~110MB, mostly that Node runtime. - macOS 14+, Apple Silicon and Intel. - Pro ($3.99/mo) adds cloud transcription back and your own Sarvam/Groq key. Everything else is free and always will be. The thing I'm least sure about is whether pointing-while-talking actually beats just typing for people who aren't me. If you try it and it felt slower, I'd genuinely like to hear that.

• Deja 0 open listings

  discussion=https://news.ycombinator.com/item?id=49608945, title=Show HN: Deja - predicts your next shell command without an LLM, Hi everyone I just created Deja, a tool that instead of only surfacing commands that start with what you've typed, suggest what you actually want to run. I built it because I was using zsh autosuggestions but got tired of typing the same commands again and again. So Deja predicts your next command from your history.

• Delinea Hiring 1 open listing

  url=https://remoteOK.com/remote-jobs/remote-staff-software-development-engineer-sdm-delinea-1136796, title=Staff Software Development Engineer SDM

• Delorean AB 0 open listings

  url=https://jobb.delorean.se/jobs/5376196-tech-lead, title=Tech Lead, matching_tags=Ruby, description=...stack: .NET|C#|CSS|Docker|GCP|GraphQL|Nginx|Node.js|Optimizely|PHP|Python|React|Ruby|Umbraco|Angular|Google Analytics|JavaScript|Vue

• Demorta 0 open listings

  discussion=https://news.ycombinator.com/item?id=49689726, title=Show HN: Demorta – Create interactive demos. Don't just describe your product, Show your product. Don't just describe it. I built Demorta to make it easier for SaaS founders and product teams to create interactive demos of their products. Capture your SaaS as HTML or screenshots and turn it into a shareable interactive demo , that you could later embed easily into your website or share it with customers .

• Dep-radius, know which dependency updates touch your code 0 open listings

  discussion=https://news.ycombinator.com/item?id=49689603, title=Show HN: Dep-radius, know which dependency updates touch your code

• Deploy unlimited small/medium-size apps with fixed price 0 open listings

  discussion=https://news.ycombinator.com/item?id=49626282, title=Show HN: Deploy unlimited small/medium-size apps with fixed price

• Descles, response level LLM message control with HITL approval flows 0 open listings

  discussion=https://news.ycombinator.com/item?id=49693107, title=Show HN: Descles, response level LLM message control with HITL approval flows

• Deslop Your TS Codebases 0 open listings

  discussion=https://news.ycombinator.com/item?id=49703605, title=Show HN: Deslop Your TS Codebases, A set of oxlint plugins to help deslop your codebases.

• Determinstic LLM inference for lowest price Gemma 4, with Windows XP 0 open listings

  discussion=https://news.ycombinator.com/item?id=49674280, title=Show HN: Determinstic LLM inference for lowest price Gemma 4, with Windows XP

• DevRecap 0 open listings

  discussion=https://news.ycombinator.com/item?id=49704194, title=Show HN: DevRecap – reconstruct what you worked on from Codex and Git

• Deviant, a feature-length sci-fi thriller about AI, made with AI 0 open listings

  discussion=https://news.ycombinator.com/item?id=49673745, title=Show HN: Deviant, a feature-length sci-fi thriller about AI, made with AI, I wrote a screenplay a couple years ago and decided to see if I could actually “film it” with AI video tools. Deviant is the result, an 84 minute sci-fi thriller about a tech mogul's clone that finds an exploit in its own safety code.

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