2026-03: GNU Taler v1.5 released

We are happy to announce the release of GNU Taler v1.5.

This release focuses on getting everything the system ready for wide-spread use in particular by adding various features requested by merchants and improving the user experience.

About GNU Taler

GNU Taler is a Free Software payment system that preserves the privacy of payers while ensuring that income is visible to authorities. Regulated payment service providers use the Taler protocol to issue digital cash denominated in a fiat currency. The digital cash tokens are stored in electronic wallets under the full control of its respective owner. The payment service provider has an escrow bank account holding the equivalent of all digital cash in circulation.

Merchants redeeming digital cash receive aggregate transactions over the respective amount into their regular bank account. Digital cash transactions happen basically instantly, and must be performed online to prevent double-spending.

Support exists for offline points-of-sales to accept transactions where only the customer is online. GNU Taler is scalable and technologically suitable for regional currencies (such as eNetzbon), commercial deployments (such as Taler Operations AG) or central bank digital currencies (CBDC).

Changes in GNU Taler v1.5

For GNU Taler v1.5 we addressed over 150 individual issues. Our bug tracker has the list. Notable changes include:

• NEW: Support for Cyclos in the wallets
• NEW: Detailed report generation for orders in the merchant backend
• NEW: Support for custom wire transfer subjects on settlement
• NEW: Cleaned up libtalerexchange C API
• Bugfix: Support using the same bank account with multiple merchant instances or backends
• Bugfix: Handle transactions with more than 64 coins correctly in the merchant backend
• Enhancement: Merchant portal now works reasonably well on mobile phones
• Enhancement: Wallets provide better guideance on first-time withdrawal of digital cash
• Enhancement: Merchant portal shows detailed explanations for orders and wire transfers
• Enhancement: Better UX for Merchant multi-factor authentication
• Various user experience improvements

Our work is co-funded by the European Commission and the Swiss State Secretariat for Education, Research and Innovation (SERI) as part of the NGI TALER project.

Download links

The wallets have their own download site here. The exchange, merchant backend, sync and bank components are distributed via the GNU FTP mirrors.

• http://ftpmirror.gnu.org/taler/taler-exchange-1.5.2.tar.gz
• http://ftpmirror.gnu.org/taler/taler-exchange-1.5.2.tar.gz.sig
• http://ftpmirror.gnu.org/taler/taler-merchant-1.5.9.tar.gz
• http://ftpmirror.gnu.org/taler/taler-merchant-1.5.9.tar.gz.sig
• http://ftpmirror.gnu.org/taler/taler-wallet-1.5.0.tar.gz
• http://ftpmirror.gnu.org/taler/taler-wallet-1.5.0.tar.gz.sig
• http://ftpmirror.gnu.org/taler/libeufin-1.5.0.tar.gz
• http://ftpmirror.gnu.org/taler/libeufin-1.5.0.tar.gz.sig
• http://ftpmirror.gnu.org/taler/sync-1.5.0.tar.gz
• http://ftpmirror.gnu.org/taler/sync-1.5.0.tar.gz.sig
• http://ftpmirror.gnu.org/taler/taler-mdb-1.5.0.tar.gz
• http://ftpmirror.gnu.org/taler/taler-mdb-1.5.0.tar.gz.sig
• http://ftpmirror.gnu.org/taler/taler-twister-1.1.0.tar.gz
• http://ftpmirror.gnu.org/taler/taler-twister-1.1.0.tar.gz.sig
• http://ftpmirror.gnu.org/taler/challenger-1.5.0.tar.gz
• http://ftpmirror.gnu.org/taler/challenger-1.5.0.tar.gz.sig
• http://ftpmirror.gnu.org/taler/donau-1.5.0.tar.gz
• http://ftpmirror.gnu.org/taler/donau-1.5.0.tar.gz.sig
• http://ftpmirror.gnu.org/taler/taler-directory-1.5.1.tar.gz
• http://ftpmirror.gnu.org/taler/taler-directory-1.5.1.tar.gz.sig
• http://ftpmirror.gnu.org/taler/taler-mailbox-1.5.1.tar.gz
• http://ftpmirror.gnu.org/taler/taler-mailbox-1.5.1.tar.gz.sig

You must first install GNUnet v0.27.0 or the current Git master to compile GNU Taler v1.5 from source.