A person can already run a Holochain app, and the app keeps its data on the devices of the people using it. Moss is local-first groupware that a small group runs on its own machines, and Volla ships Holochain apps on its phones. People share a repository link in the developer chat or a Telegram group, or ask someone who already runs the app.
What a newcomer, or an organisation choosing which apps to run, still lacks is a public page that is not itself an app. Each project lives in its own repository, with its own README, and there is no single page to open that shows what exists, what each one is for, and how to start.
hAppRadar is a public website for that, with nothing to install. It keeps a page for each of 179 Holochain projects found in public code on GitHub, counted on 24 September 2026, and the list opens on the 87 that changed their code or published a release in the year to that date. A person can now open one page per project and see what it is for, who builds it, and how to run it.
Each page says what an app is for and how to run it
A project's page says what it is for in plain words, drawn from its own README and description, and who builds it. It says how to run it: of the 87, as of 24 September 2026, 23 run inside Moss, 22 as their own desktop app and 3 on Volla phones, and a project can be more than one of these. Where the project documents the steps, the page lists them, along with the Holochain version the project builds on. A library such as hREA is among the 87 and records no way to run it on its own; its page says how to add it to an app.
Anyone whose GitHub account is older than 6 months can say whether an app runs for them, how they ran it, and whether it is worth installing, with a mark out of 5. As of 24 September 2026 no mark has been given. Every page lists the public sources it was written from and the date they were checked.
Builders can see what the others build on, and where they are
A builder choosing a Holochain version can see what the rest build on: as of 24 September 2026, 39 of the 87 build on Holochain 0.6 and 9 on 0.7. Those 87 belong to 37 different owners on GitHub. The Global page places the people building Holochain projects in 115 cities across 47 countries, from their public GitHub profiles, and names nobody.
The pages are read again every night, and the week is counted
The code is read every night. A project whose code changed in the last 90 days is marked active, one that changed in the last year maintained, and the rest stalled or archived. The pulse page counts the week across the projects on the radar and Holochain's own code: in the 7 days to 21 September 2026, 455 commits landed in 29 code bases and 18 releases were published, and at least 46 people committed code in the 90 days to that date. A Pulse article goes out every Friday.
A Signal article reports a merged pull request or a published release that changes what a project's users or builders can do, and names who made it. The article on hREA merging ValueFlows 1.0 on Holochain 0.7 is one of them. A pull request that is still being reviewed appears on its project's page, marked In review, until it merges or closes.
Maintainers can claim a page, and anyone can add a missing project
A maintainer claims a project's page by signing in with GitHub as its owner or as an author of its last 100 commits, by a link sent to an address in its commit history, or by adding a one-line file to its code. The page then carries the maintainer's name, and the project's place in every list stays as it was.
A project missing from the radar is added through Submit a project, from its public GitHub address or a link to its
.happ or .webhapp file, and checked in the next nightly read. The site is also published in Turkish.hAppRadar is built by Merlin
hAppRadar is built by Robert E. Beckner III, Merlin in the Holochain developer chat. He lived in Boulder for years and spent time around people close to Holochain in its early days. He is prototyping Granis's record layer on Holochain, so that an organisation's history is held by the organisation.