WKD Support
This page tracks the progress of WKD support and usability in different software projects, with links to any known public feature request discussions that may exist; feel free to add/update information about your favorite product.
Contents
Software table
Note: This list is sorted alphabetically and not by quality of implementation.
Column key
- Methods: A filled star represents support for one of the two access methods described in the WKD draft standard, Direct and Advanced.
- Usability: Visualizes the completion percentage to the WKD usability criteria are fulfilled.
 Name |
 Type |
 Platform |
 Methods |
 Usability |
| Balsa | Desktop | • GNU/Linux |  |
As yet untested |
| Claws Mail | Desktop | • GNU/Linux • Windows |
|
 |
| Evolution | Desktop | • GNU/Linux |  |
No testing possible |
| FairEmail | Mobile | • Android | |
 |
| Geary | Desktop | • GNU/Linux | |
No testing possible |
| GpgOL/Web (for Outlook.com) |
Browser | • Chrome-based • Firefox-based |
|
As yet untested |
| KMail (Kontact) | Desktop | • GNU/Linux • Windows |
|
 |
| Mailvelope | Browser | • Chrome-based | |
 |
| Thunderbird | Desktop | • Windows • GNU/Linux • macOS |
|
 |
| Thunderbird Mobile (formerly K-9 Mail) |
Mobile | • Android | |
|
Products notes
Balsa
- Balsa retrieves keys automatically via WKD since the release of v2.6.5 on 2025-04-12 (changes introduced in this merge request)
- Original new feature request for WKD implementation and automatic retrieval of keys
Evolution
- WKD should be enabled by default (see issue)
FairEmail
- Currently working on WKD: No
- Requested automatic retrieval of pubkeys (Post in forum)
Geary
- There is no hint in the settings of the application or the overview in the built-in manual that Geary does support encryption.
KMail
- Requested a possibility to retrieve missing keys in the area where the signature is shown
Thunderbird Mobile (formerly K-9 Mail)
- Currently working on WKD: ?
- Requested automatic retrieval of pubkeys (Issue)