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 supports 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)