deft.is
Show HN: I built a free security scanner for your domainhttps://deft.is/When I started freelancing, I was shocked how many small businesses had no idea their servers were exposed. Basic stuff, open database ports, expired SSL certs, missing security headers. The tools to find this existed, but they were either enterprise-priced or required security expertise to use.I built Deft to make security scanning accessible. Point it at any domain, checks certificate, analyzes email security (SPF/DKIM/DMARC), and grades your security headers – all in about some seconds.Features:- Port scanning with service detection across main domain + top 10 subdomains- Subdomain discovery via certificate transparency and passive recon- Email security analysis with actionable grades (A-F)- Security headers audit (CSP, HSTS, X-Frame-Options, etc.)- Executive summary for non-technical stakeholders- No signup required for the free scanThe free tier gives you a solid overview. Paid reports ($29) add full CVE vulnerability detection, complete subdomain scanning, and a detailed PDF repoDec 4, 2025 10:15 AM
printcalendar.top
Show HN: A Minimal Monthly Task Planner (printable, offline, no signup)https://printcalendar.top/Hi HN,I built a tiny tool because I couldn’t find a clean, distraction-free monthly planner that:1. shows a clean monthly task view 2. doesn’t require an account 3. doesn’t sync or store anything online 4. works offline 5. is printable 6. and keeps a minimal, distraction-free aestheticSo I made https://printcalendar.top/ — a minimal monthly task planner.It’s intentionally simple. No logins, no integrations, no dashboards. Just a small tool for people who want structure without clutter.Dec 4, 2025 5:29 AM
aihairstylechanger.space
Show HN: AI Hairstyle Changer – Try Different Hairstyles (1 free try, no login)https://aihairstylechanger.spaceI recently built a simple AI hairstyle try-on tool: https://aihairstylechanger.spaceRight now the flow is: - 1 free try with no login - +1 extra free try after logging in - After that, it's paid (to cover model costs)I’m unsure if this pricing model is fair or if the UX is confusing.Would love honest feedback on: - Is 1–2 free tries enough? - Is the paywall too early? - Are the AI results good enough to justify pay-per-use? - What would you expect as a user?Tech stack: - Next.js - Hair segmentation + masked generation - Lightweight image pipeline for blendingAny feedback is welcome — on the results, UX, speed, or pricing.Dec 3, 2025 2:07 PM
esa.int
EarthCARE lifts the clouds on climate modelshttps://www.esa.int/Applications/Observing_the_Earth/FutureEO/EarthCARE/EarthCARE_lifts_the_clouds_on_climate_modelsTrue to its promise, the European Space Agency’s EarthCARE satellite is now being used to calculate directly how clouds and aerosols influence Earth’s energy balance – the all-important balance that regulates our climate. In doing so, EarthCARE is poised to sharpen the accuracy of climate models, the very tools that guide global climate policy and action.Dec 3, 2025 10:17 AM
thealmanac.ai
Show HN: The Almanac – Generate Wikipedia-style biographies of anyonehttps://www.thealmanac.ai/Hi HN,We’ve been building The Almanac, a tool that creates Wikipedia-style articles for any person using their full public online footprint. Unlike Linkedin where people have to maintain their own profile, we automatically crawl the internet for their roles, art, projects, collaborations, publications, media mentions, everything that’s actually documented. You can make a profile for yourself or anyone else by generating it.A few things we focused on:Identity disambiguation: reliably separating people with similar names - this is very tricky and something that GPT/Perplexity gets wrong very oftenFull-stack research agent that crawls, filters, and writes structured articlesDetailed profiles that include timelines, infoboxes, sources, and citationsPublic search plus the ability to generate your own or someone else’s profileYou can try it here: https://thealmanac.aiExample profile: https://www.thealmanac.ai/article/davidliebGenerate a profile (requires login) : https://thealmanac.ai/generaDec 2, 2025 9:36 PM
systemdesigner.net
Show HN: Systemdesigner.net – a free interactive system-design learning platformhttps://www.systemdesigner.net/Hi HN,I built systemdesigner.net, a free platform for learning and practicing system design, ML systems, and GenAI architectures.I originally built it for myself while preparing for system design and ML/AI interviews. I realized my workflow was a mess: reading a blog here, watching a video there, taking notes in Google Docs, and drawing diagrams in entirely different tools. When mentoring engineers I saw the same problem. I wanted a single platform where the material, the practice problems, and the diagramming were part of one continuous loop rather than scattered across the internet.Here’s what it does today:- Guided learning plans you can generate based on what you want to study (distributed systems, ML, LLMs, etc). - Every page has built-in quizzes so you can check understanding immediately. - In-page tools: highlight text, take notes, ask questions, get explanations, or have AI discussions on any concept. - Interactive whiteboards for designing architectures and practicing intervieDec 2, 2025 4:35 PM
piperead.com
Show HN: Piperead – An AI librarian to find your next bookhttps://piperead.comHi HN, Piperead is a free web tool that uses AI to act as a personalized librarian. Instead of just genre tags, we use specific "personas" to generate recommendations.The goal was to make something simple, fast, and free. Because we achieved to keep minimum cost.The site is live at https://piperead.comWe are trying to fine-tune the recommendation quality. Feedback on the UX and the recommendation relevance is very welcome.Dec 2, 2025 2:22 PM
nasa.gov
Mark Elder: Building the Future of Spacewalking for Artemis and Beyondhttps://www.nasa.gov/centers-and-facilities/johnson/mark-elder-building-the-future-of-spacewalking-for-artemis-and-beyond/For more than 25 years, Mark Elder has helped make human spaceflight safe and possible. As the International Space Station EVA hardware manager in the Extravehicular Activity (EVA) Office within the EVA and Human Surface Mobility Program, he leads the team responsible for the spacesuits, tools, and logistics that keep astronauts protected during spacewalks—and ensures […]Dec 1, 2025 11:00 AM
news.ycombinator.com
My SaaS jumped from $6,523 to $12,648 monthly, here is howhttps://news.ycombinator.com/item?id=46076878This is my story of Postiz doubling its revenue in one month. Feel free to ask me anything.I saw an opening Postiz is traditionally an open-source social media scheduling tool. In August, I started seeing something interesting: new YouTube videos about how people are automating their social media with n8n.First, I thought it was cool, then I saw a pattern. Many people opened "Skool" groups on how to use n8n. Thousands of templates, but among them, how to create viral AI posts.I liked it for a few reasons:Low effort, people download the template and use it to post (low churn)Outcome instead of a tool - people buy the result they want, not a tool that they will need to figure out how to use, and maybe will get them results.It's a super-growing and one of the biggest trends of this year.I could target them easilyTechnical people would be drawn more to automate social media with my tool as it's open-source rather than a closed-source one.Implementation So the first thing I did was to creatNov 28, 2025 8:54 AM
news.ycombinator.com
Show HN: I built an MCP server to connect AI agents to your DWHhttps://news.ycombinator.com/item?id=46060191Hi all, this is Burak, I am one of the makers of Bruin CLI (https://github.com/bruin-data/bruin). We built an MCP server that allows you to connect your AI agents to your DWH/query engine and make them interact with your data.A bit of a back story: we started Bruin as an open-source CLI tool that brings together data ingestion, transformation, quality and governance. You can build data pipelines using SQL and Python, ingest data from many sources, run data quality checks and some more stuff, open-source. The goal has been to build a CLI experience that would make humans productive.After some time, agents popped up, and when we started using them heavily for our own development stuff, it became quite apparent that we might be able to offer similar capabilities for data engineering tasks. Agents can already use CLI tools, and they have the ability to run shell commands, which meant that they could technically use Bruin CLI as well.Our initial attempts were around building a simple `AGENTNov 26, 2025 5:45 PM
brandlist.it.com
Show HN: I built directory of fashion brands because I didn't know how to dresshttps://brandlist.it.comHi HN guys! I hope you have a happy day.A year ago, I was terrible at grooming and styling myself. To be honest, it severely affected my self-esteem and made me hesitant to even go outside.I didn't want to be a supermodel or hot—I just wanted to look like a normal person. But when I tried to find clothes, I hit a wall. I didn't know which brands were good, what style I liked, or where to start. I wasted hours just looking for a simple shirt.So, I decided to solve this problem the way I know how: by building a tool.BrandList is a directory of fashion brands categorized by specific styles (like "Classic", "Minimal", "Streetwear"). The goal is to help people find brands that fit their vibe without knowing the specific brand names beforehand.Key Features:Curated by Style: You don't search by name; you browse by "look."No Login Required: You can add/suggest brands without signing up (I hate friction).It is currently an MVP. I would love your feedback on the UX and the categorization. If youNov 26, 2025 8:17 AM
news.ycombinator.com
ClipE96: We Left the Clipboard Unguarded for 40 Yearshttps://news.ycombinator.com/item?id=46051434In 1984, Apple shipped copy and paste. It was a miracle of usability—and architecturally broken from day one.Press Ctrl+C and the entire payload—bytes, formatting, metadata, embedded objects—dumps into a system buffer that any application can read. No auth. No logging. No revocation.The clipboard is a broadcast channel disguised as a convenience.The catastrophe: The clipboard is now the #1 data exfiltration vector in enterprise. 77% of knowledge workers paste corporate data into AI tools. Every paste bypasses your CASB, EDR, SIEM, and DLP. Your security stack guards the front door while users walk data out the side.The waste: 40 billion copy operations/day × ~100KB average = 4 exabytes of daily churn. RAM pressure, cloud sync, VM duplication—all unnecessary. Annualized: 83B kWh, 33M tons CO₂, $10B in energy costs. We're burning a small nation's power grid because nobody questioned whether copying a sentence needed to ship a document.The semantic lie: Copy and cut were always opposites,Nov 25, 2025 10:12 PM
news.ycombinator.com
Launch HN: Onyx (YC W24) – Open-source chat UIhttps://news.ycombinator.com/item?id=46045987Hey HN, Chris and Yuhong here from Onyx (https://github.com/onyx-dot-app/onyx). We’re building an open-source chat that works with any LLM (proprietary + open weight) and gives these LLMs the tools they need to be useful (RAG, web search, MCP, deep research, memory, etc.).Demo: https://youtu.be/2g4BxTZ9ztgTwo years ago, Yuhong and I had the same recurring problem. We were on growing teams and it was ridiculously difficult to find the right information across our docs, Slack, meeting notes, etc. Existing solutions required sending out our company's data, lacked customization, and frankly didn't work well. So, we started Danswer, an open-source enterprise search project built to be self-hosted and easily customized.As the project grew, we started seeing an interesting trend—even though we were explicitly a search app, people wanted to use Danswer just to chat with LLMs. We’d hear, “the connectors, indexing, and search are great, but I’m going to start by connecting GPT-4o, Claude Sonnet Nov 25, 2025 2:20 PM
news.ycombinator.com
Ask HN: What do u use for agent/agentic evals?https://news.ycombinator.com/item?id=46044370Right now looking at MLFlow/Braintrust but find it hard to compare acrosss versions of agents, and a/b testing of agents, and mcp tools. Also obvious things like runaway agents (stuck in a loop), or token/spend optimalisation.What do you all use?Nov 25, 2025 10:15 AM
npmjs.com
Show HN: Open-Source Visual Wiki Your Coding Agent Writes for Youhttps://www.npmjs.com/package/daviaHi HN,We’re Ruben, Afnan, and Theo. A couple of days ago we released the early repo for Davia and were surprised by how much feedback came in right away. We decided to turn it into a full open-source package you can run locally.Davia is designed for coding agents to generate an editable internal wiki for your project. It focuses on producing high-level internal documentation: the kind you often need to share with non-technical teammates or engineers onboarding onto a codebase. Writing this kind of documentation takes forever, diagrams are often missing, and most tools don’t let you edit everything locally or integrate smoothly with your workflow.Davia is fully open source. It produces an editable workspace: – Text lives in a Notion-like editor – Diagrams live on editable whiteboards – Everything runs locally and can be modified either in your IDE or in the workspaceOne thing people found especially interesting is that you can delegate the documentation to your IDE’s AI agent. Davia hanNov 24, 2025 9:49 PM
karumi.ai
Launch HN: Karumi (YC F25) – Personalized, agentic product demoshttp://karumi.ai/Hey HN! We're Toni and Pablo, and we're building Karumi (https://www.karumi.ai), a system that lets your users get instant, scalable, guided demos of your product, fully automated, zero human interaction. It works in any language.There's a live demo at https://www.karumi.ai/meet/start/phlz.Karumi is an AI agent that operates a real web app in a shared browser session and talks the user through it. Instead of a human giving a screen-share demo, the agent opens your product, clicks around, fills forms, and explains what it’s doing. We started building this as an internal tool at our previous company. As the product grew, people kept asking “what’s the right way to demo feature X?“. Docs and scripts became outdated quickly, and the quality of demos depended too much on who was presenting. We wanted something closer to a repeatable program: an agent that knows the main flows, understands who it’s talking to, and can walk through the product without getting lost.Over time this turned into tNov 24, 2025 6:37 PM
github.com
Show HN: Ilseon, a Minimalist Focus Filterhttps://github.com/cladam/ilseonI’m excited to share a new productivity app I recently released on the Play Store. It was born out of pure necessity to solve a problem I am constantly faced with: cognitive overload and task paralysis.Since traditional to-do apps only added to the mental noise, I eventually built a small tool for myself called Ilseon. I needed something that would actually reduce cognitive load.I have added some features that helps me in my daily chaos:Context filtering: I work better when I only see what belongs to the role I’m currently in (Work, Family, Health, etc.). Switching context hides everything else, which stops me from bouncing between unrelated tasks or getting overwhelmed by a big master list.Time blocks with a big visible countdown: This externalises time for me in a way alarms or calendars never did. It gives me one clear block to focus on, and the timer helps with time blindness without being stressful. Still figuring out if adding alarms is a good idea or not..A quick reflection loopNov 23, 2025 8:17 PM
nano-banana2.app
Show HN: NB2 Hub – Free Nano Banana Pro AI Image Generatorhttps://nano-banana2.appHi HN,I recently launched nano-banana2.app , a free, minimalistic AI image generator built around the latest Nano Banana Pro models.The goal: make it easy to generate high-quality, photorealistic images with precise camera settings, lighting presets, and character consistency — even if you're not a prompt expert.Key Features:Supports Nano Banana Pro models (Pro excels in text rendering, detail retention, and photo realism)You can try it here: https://nano-banana2.appI built this because I was constantly switching between AI tools trying to get consistent output for creative and product imagery. I wanted a fast, clean playground that focuses solely on the Nano Banana family of models, which recently gained a lot of traction in the AI image space.Would love your feedback on:What tools / controls / workflows you’d want next?Any use cases you'd want to see supported?If you've tried Nano Banana models: what results surprised you most?Thanks for reading — happy to answer anything! — ZaneNov 22, 2025 12:46 PM
useneedle.net
Show HN: Needle – Find users, track competitors, and spot market opportunitieshttps://useneedle.netHi HN, I am Vaibhav - a founder based in Bangalore, India.Most founders build without knowing who their real competitors are or what users are actually asking for right now. We usually search Google, Twitter, Reddit manually and hope to catch signals - but it’s slow and incomplete, hence easy to miss important conversations.. This is exactly what Needle solves.I built Needle because I kept struggling to answer a basic question while building MoveOnFromYourEx (Ai tool that helps people move on after a breakup): "Where are the people who are already talking about the problem I am solving?"I spent hours manually searching Reddit, StackOverflow, Quora, Product Hunt, GitHub, etc., trying to find real problem discussions. I opened dozens of tabs, scrolled endlessly, and still missed important threads. It felt random and inefficient.I also realized something else: Competitors are not always the big companies. If you are building a search engine, Google is not your competitor. The 15 indie proNov 21, 2025 1:51 PM
spacedaily.com
Radiation hardened circuit platform expands space electronics developmenthttps://www.spacedaily.com/reports/Radiation_hardened_circuit_platform_expands_space_electronics_development_999.htmlLos Angeles CA (SPX) Nov 20, 2025 BAE Systems has unveiled new advances for its radiation-hardened 12 nanometer RH12 Storefront technology, designed to support space missions requiring resilient integrated circuits. The RH12 Storefront offers a comprehensive library of application-specific integrated circuit development tools and proven intellectual property cores, allowing customers to produce system-on-chip solutions suited toNov 21, 2025 9:30 AM
