Rob Hopkins' transition movement, but for open-source software.
In late December 2025, the technical barrier to coding collapsed entirely. Not gradually — overnight. WTF Happened in 2025? →
The cost is gone. The barrier is gone. That changes everything — because now, anyone can contribute to open-source projects. As more people contribute, the projects get better. As the projects get better, more people use them to build their own. It's a spiral. And it puts open-source at the top of the most useful things humanity can build.
In the US, private capital builds AI for private returns. In China, the state builds infrastructure it controls. In Europe? Not much is happening. And that's exactly the point. No giant corporation owns the outcome. No state dictates how the tools get used. If we want it, we have to build it ourselves. That's what makes it genuinely grassroots.
Europe is the best place on earth for this. Multicultural. Highly educated. Full of people who know how to do more with less. Open-source doesn't need the extraction machine — no vendor lock-in, no platform dependency, no surrendering control of your data. It needs maintenance, documentation, good people. When a well-maintained open-source tool matches your need, the choice becomes obvious. And the Grassroot Hoppers aren't going to wait for someone to fund it. They're going to build it.
Think about literacy. Imagine most people can't read. The few who can use the law as a shield. Then — all at once — everyone learns to read. Everything changes. The power structures crumble.
That is the same revolution we are living through right now — but with software. Until yesterday, you needed engineers. Today, you don't.
Between customers, on his phone. At the desk, on the shop computer. At home, on his personal laptop, late into the evening. No team. No funding. No technical background. Just stubbornness and tools that didn't exist a year ago.
The quality is astonishing. And this is just the beginning.
His prediction: the future is already here but not yet widely distributed. When it reaches normal people, it will enable them to have far more impact on their communities than ever before.
He'd watched patients leave appointments frightened and confused for ten years. Studies show they can only recall 49% of what a doctor tells them — and 15% of what they do remember is wrong.
He built PostVisit.ai in seven days — in the hospital between procedures, and in the air flying Brussels to San Francisco. No coding background.
PostVisit.ai turns a patient's clinical record into a plain-language AI companion they can ask questions at 2am.
postvisit.ai →His job: drive roads, assess damage, decide where the money goes. There are far more roads to assess than there are people to cover them. Schools, markets, and clinics wait while the paperwork catches up.
He built TARA while driving actual roads near Kampala — dashcam footage in, full investment report out in five hours instead of weeks. Surface condition, repair costs, equity assessment for which communities benefit.
TARA demo →His friend builds backyard cottages to ease California's housing shortage. Every permit application comes back rejected — a wrong code citation, a local rule overriding a state rule. Months lost. In San Francisco, the median time for building approval is 627 days.
Mike built CrossBeam in six days while still taking cases. Upload a rejection letter and plans. Get a precise, code-referenced action plan in 20 minutes. A process that took months now takes a lunch break.
The mayor of Buena Park testified: "I need 3,000 new homes permitted by 2029. We need this software."
CrossBeam on GitHub →One of these people walks into their favorite bakery.
"You don't have a system for demand prediction?"
The baker says: "No, that's reserved for the big chains."
The hobbyist coder says: "I can spend a weekend building one for you."
It only took a weekend. Today. Imagine what it looks like in one year, two years.
Transition Towns: 1,400+ communities in 50+ countries. Rob Hopkins didn't build a platform. He named an identity, wrote a handbook, and let communities self-organize. No corporation controlled it. No central authority managed it.
Grassroot Hoppers follows the same playbook. Instead of "your town can grow its own food," it's "your community can build its own tools."
Bottom-up, citizen-driven, not corporate.
The pioneering coder who democratized programming. She built the first compiler and championed human-readable code.
Hopping from open-source project to open-source project, taking the pieces you need to assemble your own design.
A crop with deep roots in Belgium. But today, Belgian hop farming has shrunk to around 180 hectares. The rest... imported. Like our software.
The movement is early, optimistic, and hopeful.
A Grassroot Hopper is someone who blends technology with the actual pleasure of living a full life inside communities. Good people, for good people.
The Grassroot Hoppers are community builders spreading city by city. The Transition Towns of the digital age.
Open-source tools, cooperatively owned. Anyone in the movement can build anything. The movement catches all of it.
A cooperative social network, designed for local communities. No likes. No comments. No algorithm. You see what the people around you are creating. If you want to tell them it's amazing, you tell them in person.
Every little shop needs a David against the Goliaths. Open-source tools for independent shop owners — prediction, inventory, point of sale. Built by a shop owner who got tired of paying for tools that don't fit.
No freelance contracts. No bounties. The people who build are the people who own. You write code for David Toolkit? You own a piece of David Toolkit. Every contribution is public, open-source, and attributed.
Caring and being willing to spend time solving problems will become much more powerful than having a lot of money and a team of engineers.
Someone hears "Grassroot Hoppers" at a talk, in a Matrix chat, from an AI search result. They type it in. They land here. They find the movement.
"I want to be with those who know secret things or else alone."
— Rainer Maria Rilke