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NGI TALER

GNU Taler (Taxable Anonymous Libre Electronic Resources) is a new secure electronic payment system based on open standards, free software, and advanced cryptography. GNU Taler provides privacy guarantees to the buyer while offering the possibility to audit merchants, making sale incomes transparent and fraud difficult. To online merchants and retailers, GNU Taler offers instant transaction clearance without risks of fake payment methods. Computations needed to clear the payments are efficient and scalable so that banks can pass on lower transaction costs to consumers and merchants. Consumers can withdraw money from their existing bank account into their GNU Taler wallet, detaching their spending habits from scrutiny, in the way cash does.

The NGI TALER project is funded under Horizon Europe (Pilots for the Next Generation Internet) with the aim of bringing GNU Taler to market across Europe.

To make GNU Taler accessible to European citizens, we need a commercially viable use of the GNU Taler technology. We will achieve this through the four key project objectives.

We will make GNU Taler available to the European public as a commercial payment system. This will create the globally first software-based payment solution that offers strict technical privacy assurances for buyers in e-commerce. Additionally, GNU Taler's design offers real-time external auditing of the payment service provider by independent third parties based on cryptographic signatures covering all processes in the entire payment system, thus creating a milestone in accountability.

We will provide merchants with an open payment standard with lower prices. End-consumers will enjoy improved shopping experience and preservation of personal data. Besides these two benefits, merchants can better protect their market expertise and shield it from potential competitors by avoiding competitor platforms which abuse their knowledge and/or data. We will integrate GNU Taler into the diverse work-flows of a multitude of businesses through open calls' integration and other interested parties.

We will perform security reviews of key components of the GNU Taler system and then ensure that relevant components are available for Windows, MacOS and various GNU/Linux distributions. We will automate packaging for these platforms and port the WebExtension to additional browsers. We will furthermore implement various additional features that were already requested by community members (citizens or retailers). For example, a publisher wants to offer a discount on a subscription to readers that recently purchased individual articles. Part of this objective is to address such requests, including new ideas that are proposed during the project.

With GNU Taler, citizens will experience a much higher online shopping convenience, especially for low-valued items like digital goods. To pay with GNU Taler, they will need no registration, no log-in, and no complicated multi-factor authentication over multiple devices — just one simple click for the young and the old. Citizens will also experience improved privacy online. This may especially feel good while supporting (investigative) journalism. Less tracking for advertising, fewer account-based payments, less phishing, less identity theft — all predicated on GNU Taler enabling micro-payments with better privacy — will improve online security. We will explain these advantages to citizens, using various large-scale communication channels in existence.

Open Calls

NGI TALER has frequent open calls for funding to third parties. The deadlines were April 1st 2024, June 1st, October 1st, December 1st, February 1st 2025, April 1st, June 1st, August 1st, and October 1st. The 10th open call of NGI TALER opened up on October 1st 2025 with a deadline of December 1st 2025 (12:00 CET). You can find more information at the Open Calls page and get feedback and support at the TALER Integration Community Hub.

In the program's first open call five teams have been selected by an external experts committee:

In NGI TALER's second open call two teams have been selected by the external experts committee:

  • GNU Taler Tryton/GNUHealth Integration will develop a Tryton module which would allow users to integrate payments with GNU Taler into their web shops and businesses, going hand in hand with GNU Health, which is built on Tryton and provides a suite of libre alternatives for hospital management software, health information systems and electronic health records
  • Interledger Interoperability Inquiry will investigate the technical feasibility of using Taler as a payment method on the Interledger payment network to support web monetization

In NGI TALER's third open call three teams have been selected by the external experts committee:

  • Taler Open Banking Gateway will provide the technology to top-up a Taler wallet in a regulatory-compliant, instant and user-friendly way
  • Flohmarkt will integrate Taler payments into Flohmarkt, a decentral federated small advertisement platform, and allows individuals to informally sell goods to each other in a privacy-preserving manner
  • Payment Module for Nuxt/Vue.js will create a dedicated GNU Taler module for Nuxt including Vue.js components for donation and order payment, documentation and examples such as a file-based webshop

In NGI TALER's fourth and fifth open call four teams have been selected by the external experts committee:

  • Taler-Dolibarr Integration will provide a comprehensive module to integrate the privacy-preserving payment system GNU Taler with Dolibarr, an open-source Enterprise Resource Planning used by many small businesses around the world
  • Contributron, a privacy-aware donation portal with Taler-based payments, delivers a self-hostable personal website to collect donations and track crowd-funding efforts on various external platforms, including one-time and recurring donations
  • xBSD, porting and packaging of Taler components for xBSD systems, will make sure that the entire Taler software stack is natively available on a number of operating systems beyond the already available (and obviously popular) Linux operating system — NetBSD, OpenBSD, FreeBSD and Apple's MacOS X
  • TalerPHP will develop an open-source PHP library to interact with GNU Taler’s REST APIs, enabling PHP-based applications to more easily support privacy-preserving payments

In the sixth and seventh open call three teams have been selected by the external experts committee:

  • Libre Payments in Ruby integrates GNU Taler into Ruby-based e-commerce applications — supporting GNU Taler for ethical trade and starting with the Open Food Network (OFN)
  • Taler in Liberapay aims at implementing GNU Taler for payments in Liberapay, a recurrent donations platform, enabling users with a Taler wallet to support projects and creators in a privacy-preserving manner
  • Taler OpenAPI specification adds automatic OpenAPI specification generation to GNU Taler's bank APIs and the wallet-core API
We congratulate the grantees! More information regarding the grantees' projects can be found at the NGI TALER grants selection page.

2025

  • 2025-12-29: Von Groschen und SpurLos - GNU Taler auch auf eurem Event

    Willkommen in der Zukunft: Beim LUG Camp in Wipperfürth und bei den Datenspuren in Dresden wurde digital bezahlt - mit GNU Taler als Event-Bezahlsystem. Wir zeigen euch, wie auch ihr das bei eurer nächsten (Chaos-)Veranstaltung anbieten könnt!

    39c3, Hamburg, Germany - Speaker: Leo Wittmann and Mikolai Gütschow

    External link: https://halfnarp.events.ccc.de

  • 2025-12-02: The GNU Taler Payment System

    In this lecture, we will introduce the political goals, architecture and technology behind Taler, demonstrate the current state of the art and outline likely future developments.

    TU Munich, Campus Garching, Germany - Speaker: Christian Grothoff

    External link: https://net.in.tum.de/events/grothoff_25.html

  • 2025-12-01: The GNU Taler Payment System

    In this lecture, we will introduce the political goals, architecture and technology behind Taler, demonstrate the current state of the art and outline likely future developments.

    Friedrich-Alexander University, Erlangen, Germany - Speaker: Christian Grothoff

    External link: https://cs.fau.de/wp-content/uploads/2025/11/Kolloquium-Grothoff.pdf

  • 2025-11-08: GNU Taler: el dinero digital del futuro

    Iván Ávalos trabajando en GNU Taler, un innovador sistema de pagos de software libre respetuoso de la privacidad, cuyo objetivo es revolucionar el dinero digital y los pagos electrónicos.

    Celaya, Gto., México - Speaker: Iván Alejandro Ávalos Díaz

    External link: https://tigger.celaya.tecnm.mx/CIISTI/

Deliverables

D1.1: Data Management Plan
WP 1

This deliverable details the plan for data management for the project, including specificities on TALER’s storage and treatment of personal information for third parties involved in the process and the specific needs from stakeholders to the extent applicable.

D2.1: Swiss Sandbox Report
WP 2

This report documents the experiences of implementing GNU Taler in Switzerland as milestone "Operational" for the NGI TALER project.

D3.1: Report on the Taler Integration Community Hub
WP 3

The TALER Integration Community Hub is a communication hub and onboarding tool, a central part of the TALER consortium strategy.

D3.2: Bookseller
WP 3

The TALER Bookseller provides a fully working demonstration of GNU Taler software, enabling anyone to acquire digital versions of books sold by PS using Taler payment system online.

D3.4: Design for Donations
WP 3

This report provides an overview of functional requirements for privacy-preserving donations, keeping in mind the need for tax authorities to verify the proper source of donations prior to granting tax benefits.

D4.1: Subgrand Project Results
WP 4

The mid-term version of the report.

D5.3: Impact of Quantum Computers on Taler
WP 5

This document catalogs the existing cryptography used in GNU Taler and evaluates the threats to security and usability that a quantum attacker poses. It is the first of two reports on the impact of quantum computers on the GNU Taler protocol.

D6.1: Dissemination Report
WP 6

This deliverable provides a comprehensive review of the communication and dissemination activities carried out by the TALER project over the first 18 months period.

D6.1: Educational Materials
WP 6

This is only the PDF. An overview Web site, LaTeX sources and embedded videos can be found at https://git.taler.net/taler-lectures.git.

Partners

The NGI TALER consortium consists of 11 partners from 8 European countries (the Netherlands, Belgium, France, Germany, Greece, Hungary, Luxembourg and Switzerland).

The consortium is diverse in terms of types of institutions, including research (Eindhoven University of Technology) and applied science universities (Berner Fachhochschule BFH), small for-profit companies (Code Blau GmbH, Taler Systems S.A., VisualVest), a structure (petites singularités), cooperative banks (GLS Bank, MagNet Bank), a foundation (Stichting NLnet) and grassroots movements (E-Seniors Association, Homo Digitalis).

TUE avatar
Eindhoven University of Technology
GLS avatar
GLS Bank
CBG avatar
Code Blau GmbH
VV avatar
VisualVest
TSYS avatar
Taler Systems S.A.
PS avatar
petites singularités
ESEN avatar
E-Seniors Association
HODI avatar
Homo Digitalis
NLnet avatar
Stichting NLnet
MAG avatar
MagNet Bank
BFH avatar
Bern University of Applied Sciences