Fastest-growing OSS startups for every quarter since Q2 2020
Over five years ago, I started publishing the top 20 trending open-source startups every quarter, based on their relative GitHub star growth — the ROSS Index. It has become quite handy for 60K+ developers, founders, and other OSS fans who have visited it to date. To make it even more convenient, we have just open-sourced its full dataset for 22 past quarters, including the fresh list for Q3 2025, so everyone can play with it — for instance, analyze what happened with startups from the first quarters. Given that in the very first index issue (Q2 2020), 5 out of 20 early-stage startups (n8n,…
Fastest-growing OSS startups for every quarter since Q2 2020 launched on October 23, 2025 with 5 votes and more than 75% of that year's launches. The site was still online in September 2026, 1 year on.
What it does
Datasets for the Runa Open Source Startup (ROSS) Index—quarterly top-20 trending open-source startups ranked by GitHub star growth. - RunaCapital/ROSS-Index
Since Q2 2020, the ROSS Index publishes the top open-source startups by the relative growth rate of GitHub stars at their repositories. The calculation of the growth rate starts from the moment when a repo crosses a 1000-star mark, and the results are published every quarter. The purpose of this index is to highlight new, trending open-source startups using a simple and transparent basis. It was created by Konstantin Vinogradov and is maintained by venture capital firm Runa Capital, which has invested early in many OSS startups, including n8n , Nginx , MariaDB , Twenty and Mastra . We chose only one basic metric as, otherwise, it would be hard to verify the index results externally. Any…from github.com
In the maker’s words, at launch
Over five years ago, I started publishing the top 20 trending open-source startups every quarter, based on their relative GitHub star growth — the ROSS Index. It has become quite handy for 60K+ developers, founders, and other OSS fans who have visited it to date. To make it even more convenient, we have just…
Does a similar job
all alternatives →More dev tools this month
the category →
Contribute to oosexgang/hackios-xnu-kernel development by creating an account on GitHub.
Dev tools · 2d ago · github.com


open-source IDE for thoughtful software design. Contribute to devdotfast/whiteboard development by creating an account on GitHub.
Dev tools · 30d ago · github.com

Contribute to reladraw/reladraw development by creating an account on GitHub.
Dev tools · 28d ago · github.com
OpenBot▲362Grok Bot alternative: free, local, open-source, multiplayer
Dev tools · 25d ago · openbot.run
Talanoa▲346Hi HN, I’m a fullstack developer, and honestly, I’ve lost count of how many side projects I’ve worked on over the years. But one idea kept coming back to me: a different kind of email client. It first came to me in 2014: “What if we could handle emails more like conversations?” Every year, I’d revisit this concept in my “Build Notes.” Ten years later, no one had built exactly what I had in mind — so I finally decided to do it myself. That’s how Talanoa was born. I wanted something focused on people, not timelines. I was tired of marking messages as unread just to remember to reply later, or…
Dev tools · 22d ago · talanoa.email
Source: Show HN post ↗ · launch text quoted in part
Launched alongside, October 2025
the whole month →


I went down the rabbit hole on a side project and ended up building this: Strange Attractors(https://blog.shashanktomar.com/posts/strange-attractors). It’s built with three.js. Working on it reminded me of the little "maths for fun" exercises I used to do while learning programming in early days. Just trying things out, getting fascinated and geeky, and being surprised by the results. I spent way too much time on this, but it was extreme fun. My favorite part: someone pointed me to the Simone Attractor on Threads. It is a 2D attractor and I asked GPT to extrapolate it to…
AI · Oct 2025 · blog.shashanktomar.com

Autism Simulator▲779Hey all, I built this. It’s not trying to capture every autistic experience (that’d be impossible). It’s based on my own lived experience as well as that of friends on the spectrum. I'm trying to give people a feel for what masking, decision fatigue, and burnout can look like day-to-day. That’s hard to explain in words, but easier to show through choices and stats. I'm not trying to "define autism". I’ve gotten good feedback here about resilience, meds, and difficulty tuning. I’ll keep tweaking it. If even a few people walk away thinking, "ah, maybe that’s why my coworker struggles in those…
Life & fun · 2025 · autism-simulator.vercel.app
