YC News Startups
Startups connected to Y Combinator are the focus here. Read about newly launched products, growth milestones, fundraising news, and shutdowns, along with analysis of the patterns that emerge when hundreds of ambitious young companies pass through the same accelerator.
Coverage often clusters around launch season, when dozens of new companies announce themselves in quick succession, and around funding cycles, when graduates close seed and Series A rounds. Between those peaks you will find growth stories, pivot announcements, and honest post-mortems from teams that wound down.
Studying many startups from a shared starting point is unusually revealing, because differences in outcome say more when the initial conditions are similar. Founders mine these stories for tactics, while investors and researchers use the cohort view to separate durable trends from passing fashion.
Running MicroVMs in Proxmox VE, the Easy Way
2026-06-21A community discussion surrounding Proxmox VE microVMs highlights that recent orchestration improvements make this lightweight virtualization method more viable than past evaluations suggested. While users appreciate the rapid boot times and improved security isolation compared to LXC containers, challenges such as CUDA GPU passthrough and userspace initialization speeds remain. Consequently, the community is eagerly anticipating native, first-class microVM support directly within the Proxmox platform.

Google Hits 50% IPv6
2026-06-21Google has reached a major milestone in internet technology adoption, with approximately half of its users now accessing the company's services over IPv6. This achievement highlights the continuing global transition toward the newer network protocol.

Whole cross-sectional human ultrasound tomography
2026-06-21Researchers have developed a novel ultrasound tomography system that uses a 512-element circular receiver array and a rotating transmitter to capture complete cross-sectional images of the human body, overcoming the limited field of view of traditional handheld ultrasounds. The new technology closely matches MRI results and offers practical clinical applications, including radiation-free fat assessment and real-time biopsy needle localization.

PowerFox Browser
2026-06-21PowerFox is a secure and open-source web browser designed to bring modern browsing capabilities to older Apple systems. It is fully compatible with Mac OS X 10.4 Tiger, 10.5 Leopard, and 10.6 Snow Leopard. The software supports both Intel and legacy PowerPC Mac architectures.
Proportional-Integral-Derivative (PID) controllers
2026-06-21Reader discussions highlight the enduring appeal of Proportional-Integral-Derivative controllers among programmers due to their intuitive balance of conceptual cleverness and ease of implementation in robotics projects. Although PID remains a staple for educational applications like line-following robots, practitioners note that tuning it for complex real-world motor control is highly challenging, leading some developers to adopt advanced alternatives like Active Disturbance Rejection Control.
Zigzag Decoding with AVX-512
2026-06-21The creator of the meshoptimizer library recently explored methods to accelerate AVX-512 vertex decoding. During this process, the developer discovered two interesting optimization techniques that were ultimately not used in the final implementation. This article explores these unused methods while teasing a future deep dive into the specific optimizations that actually made it into the codebase.

FDA advisors unanimously vote to approve Moderna's mRNA after agency drama
2026-06-21FDA advisors have unanimously voted to approve Moderna's mRNA vaccine, overcoming recent political interference at the agency. This decisive approval follows controversy in February when a Trump administration official initially refused to review the vaccine.

HPV vaccine cuts risk of dying from cervical cancer before 30
2026-06-21Recent research shows that the HPV vaccine significantly lowers the risk of cervical cancer mortality for women under 30. Despite this positive finding, experts warn that declining vaccination rates among teenagers could cause a future resurgence in both cases and deaths.

Guide to the TD4 4-bit DIY CPU
2026-06-21A new guide details the experience of building and programming the TD4, a compact 4-bit DIY CPU kit sourced from Aliexpress. The hardware is quite limited, featuring just two registers, some indicator LEDs, and 16 bytes of program ROM. However, it remains a highly rewarding project that effectively teaches the fundamental principles of computer architecture.
Project Fetch: Phase Two
2026-06-21Anthropic's latest Project Fetch results reveal that the Claude Opus 4.7 model can independently perform sophisticated robotics tasks. Operating without human assistance, the AI completed the work approximately 20 times faster than the fastest human teams managed less than a year ago.

Building reliable agentic AI systems
2026-06-21Developers are building reliable agentic AI systems to help pharmaceutical researchers efficiently query decades of historical data buried in PDF reports. These advanced agents can autonomously navigate and extract critical insights from complex documents, significantly streamlining drug discovery and analysis.
Show HN: Recall – Local project memory for Claude Code
2026-06-21A new open-source tool called Recall gives Claude Code persistent local memory that operates entirely offline. This prevents developers from wasting tokens by repeatedly explaining their project context at the start of every new session.
DOS Game "F-15 Strike Eagle II" reversing project needs DOS test pilots
2026-06-20A hobbyist developer is reverse engineering the original binaries of the 1989 DOS game F-15 Strike Eagle II to recreate its C source code. The project creator is currently seeking volunteer DOS test pilots to help playtest and verify the reconstructed software.

SMPTE Makes Its Standards Freely Accessible
2026-06-20SMPTE has announced that its entire catalog of media technology standards is now freely available to the global community. This initiative provides media professionals, technologists, and engineers with unrestricted access to essential industry guidelines. Removing financial barriers to these resources is expected to foster greater collaboration and innovation across the sector.
UHF X11: X11 Built for VisionOS and Apple Vision Pro
2026-06-20UHF X11 is a new native X11 server designed specifically for the Apple Vision Pro and visionOS. It enables users to run classic Unix and traditional workstation software seamlessly within spatial windows. This integration brings legacy computing environments directly into Apple's mixed-reality ecosystem.

CSSQuake
2026-06-20CSSQuake is a browser port of the classic game Quake that renders 3D geometry entirely through inspectable HTML and CSS. Powered by the PolyCSS framework, this innovative project delivers the gameplay experience without relying on traditional WebGL or canvas renderers.

Unauthorized alert sent to cell phones across Brazil
2026-06-20Hackers are suspected of sending unauthorized cell phone alerts with a mysterious message to multiple states across Brazil on Saturday morning. The Brazilian government is investigating the incident to determine how the unauthorized broadcast was executed.

Where to Find the Colors Your Screen Can't Show You
2026-06-20A comprehensive atlas maps the vibrant colors of the natural world that standard digital screens are physically incapable of reproducing. By cataloging this vast spectrum of natural hues, the project highlights the limitations of current display technology and the persistent gap between digital reproduction and physical vibrance.
GPT-5.5 hallucinates 3x more than MIT-licensed GLM-5.2
2026-06-20Recent evaluations reveal that GPT-5.5 hallucinates three times more frequently than the MIT-licensed GLM-5.2 model. This significant accuracy gap highlights a major reliability advantage for GLM-5.2, making it a compelling choice for developers prioritizing factual precision.

Can you see three trees?
2026-06-20A simple three-part test evaluates whether cities provide residents with adequate access to nature and green space. According to the assessment, the vast majority of urban areas currently fall short of these basic environmental standards.