flohmarkt

A free, federated marketplace for second-hand goods

Screenshot of the flohmarkt web interface showing a marketplace listing page

flohmarkt is a self-hostable, decentralised platform for buying and selling second-hand items. Each instance is run independently, but all instances are interconnected through ActivityPub — the same open protocol used by Mastodon, Pixelfed, and the wider Fediverse.

You can browse items from many instances at once, contact sellers directly, and follow listings that interest you, without creating a separate account for every site.

flohmarkt is available in many languages. You can help translate it into yours!

flohmarkt is used all over the place. You can make one for your town, your community, or even your animal rescue.

flohmarkt is free and open-source software licensed under the AGPL-3.0.

News from the Fediverse

grindhold 2026-03-14

today an important cornerstone towards implementing FEP-0837 in has been finished: i overhauled the backend of the currency system. Each currency now relies on a single global identifier in the form of an URL. We hope for most of these to be URLs to entities in the future but of course we did not compromise the ability to have free-form currencies. When a user creates a free-form currency, there will be a URL for that instance.

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grindhold 2026-03-02

Anscheinend ist mittlerweile großgenug um seine erste eigene Phishingwelle zu bekommen. Die Betrüger scheinen es im deutschsprachigen Raum auf Kontodaten abgesehen zu haben.

1. Liebe User: Wenn euch jemand auf auffordert, zur Bestätigung eures Accounts Eure Konto-/Kreditkartendaten auf einer verlinkten Seite einzugeben, ist das ein Betrugsversuch. Seriöse Flohmarktadmins wollen sowas *NIE* von euch wissen.

2. Liebe Admins: Bitte updatet auf die eben erschienene 0.16.1.

Ein screenshot einer Phishingnachricht auf Flohmarkt. Die Angreifer versuchen, den Nutzer unter dem Vorwand, man müsse seinen Flohmarkt-Account bestätigen, dazu zu bringen auf einen externen Link zu klicken. Hinter diesem verbirgt dann ein Formular für die eingabe vertraulicher Bank- oder Kreditkartendaten. Die Angreifer geben sich als SupportTeam@flohmarkt.ween.de aus. Es gibt kein SupportTeam beim flohmarkt.ween.de
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chewie 2026-02-11

I have managed to set up a instance, thanks to some project devs who fixed a bug that stopped me from configuring it properly 🥳

Thanks @grindhold and others for creating it ❤️

I have created one to play with for the (UK) and nearby areas.

If anyone wants an account, feel free to join at flohmarkt.gogreenit.net and read the rules :)

I need to add some other servers so you can see more items for sale, as I've only put 1 item of my own on there as of now.

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grindhold 2026-02-04

today, the software has witnessed its first login via . A keycloak installation served as the identity provider. This marks the beginning of the end of our integrate-more-auth-backends saga!

a screenshot of the flohmarkt login screen that now features a "use keycloak" button
the default login view of keycloak
a username "harrypotter" and a password are entered
a screenshot of flohmarkt with opened user menu. the menu shows that the harrypotter-user from the former screenshot is now currently logged in.
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Profpatsch 2025-12-19

admins: please enable the new FediAuth feature when updating to 0.14!

It’s benign and will allow users to log in via their existing Fediverse accounts, no extra password needed!

Also we’d like some feedback if possible!

I know there’s still things we could add or improve (like having open registrations being separate from whether accounts are active for example), but we need to know if you need them!

The Administration page of flohmarkt, with the new FediAuth section underneath the Username/Password section and an “enabled” checkbox
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grindhold 2025-12-12

\o/ as promised we have released a new version of ten minutes ago. We're 50 minutes early :)

It's 0.14.0

I think it's our biggest release since 0.2.0 and we thank @nlnet and @NGIZero for making this possible.

As spoilered, the most important changes are Support for multiple authentication backends (username/password, ldap, fediauth) and an overhaul of the geographic concept behind flohmarkt.

Get it at codeberg.org/flohmarkt/flohmar .

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grindhold 2025-12-05

The features we are most proud of are:

* We overthrew the geographical concept for an entirely new one.
* We offer you new ways to authenticate yourself than just username/password (Fediauth and LDAP)
* and much, much more…

Stay tuned :)

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