Keybase

 Keybase  is an unmaintained GPG key silo acquired by Zoom in 2020, though it does support the rel-me IndieWeb building block, and was used by a few community members.

Initially, our single top priority is helping to make Zoom even more secure. There are no specific plans for the Keybase app yet. Ultimately Keybase's future is in Zoom's hands, and we'll see where that takes us. Of course, if anything changes about Keybase’s availability, our users will get plenty of notice.
 * Keybase team now working on Zoom security instead with no specific plans for Keybase:
 * No subsequent updates as of 2022-09-14

Building Blocks
Keybase supports the following IndieWeb building blocks:
 * rel-me

IndieWeb Examples

 * : https://keybase.io/cleverdevil
 * : https://keybase.io/aaronpk
 * : https://keybase.io/jackyalcine
 * : https://keybase.io/davidmead

Other Services

 * 2017-02-08 Keybase.io unveiled an end-to-end encrypted chat product.

Harrasment

 * 2019-09-20 hello world, except keybase "…the intrusive behavior, and harassment even, has only escalated. and then, of course, keybase adds cryptocurrency to the equation…"
 * 2019-12-02: https://twitter.com/aredridel/status/1201338814859501569
 * "That's it. I'm out. Fuck @KeybaseIO #keybaseenablesharassment." @aredridel December 2, 2019

(could use more citations with details about resolution if any)

2014-10-02 DB connection lost
On 2014-10-02 all Keybase profiles and key lookups failed (for minutes? hours?) due to: "Yeah we lost the DB connection in our Web process so all queries were failing. Weird, first time we've seen that bug."

Alternatives

 * Keyoxide (https://keyoxide.org) – "a secure, privacy-friendly and decentralized platform to manage online identities".
 * https://keys.pub