ulid vs ksuid

ulid

Universally Unique Lexicographically Sortable Identifier (ULID) in Python 3 (by ahawker)

#Random Generator #Python #Python3 #Ulid #Uuid

ksuid

Java implementation of K-Sortable Globally Unique IDs (by akhawaja)

#Java8 #Cryptography #Distributed Computing #Uuid

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ulid		ksuid
	Project
3	Mentions	2
335	Stars	41
-	Growth	-
0.0	Activity	0.0
10 months ago	Latest Commit	7 months ago
Python	Language	Java
Apache License 2.0	License	GNU General Public License v3.0 or later

The number of mentions indicates the total number of mentions that we've tracked plus the number of user suggested alternatives.
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.

ulid

Posts with mentions or reviews of ulid. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2022-06-12.

New UUID Formats from IETF
12 projects | news.ycombinator.com | 12 Jun 2022

As the author of a popular ULID implementation in python[1], the spec has no stewardship anymore. The specification repo[2] has plenty of open issues and no real guidance or communication beyond language implementation authors discussing corner cases. The monotonic functionality is ambiguous (at best) and is implemented differently per-languages [3].
Functionality, UUIDv7 might be the _same_ but the hope would be for a more rigid specification for interoperability.
[1]: https://github.com/ahawker/ulid
[2]: https://github.com/ulid/spec
[3]: https://github.com/ulid/spec/issues/11
Sortable Collision-Free UUIDs
10 projects | news.ycombinator.com | 3 May 2021

Looks similar to ULID[0] (I am the author of a popular python implementation[1]).
It appears to have a similar constraint that two ID's generated within the same timestamp (ms, ns) have no strong guarantee of ordering. That might not be a deal breaker depending on your use case but something to consider.
* https://github.com/ulid/spec
* https://github.com/ahawker/ulid
Usando ULIDs para criar ordem em dados não ordenados
3 projects | dev.to | 12 Apr 2021

ksuid

Posts with mentions or reviews of ksuid. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2021-09-26.