sharedb

Realtime database backend based on Operational Transformation (OT)

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15Distinct people

24Mentions

0Explicit recommenders

6.6KGitHub stars

REPOSITORY AT A GLANCE

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What it is

Realtime database backend based on Operational Transformation (OT)

GitHub

Where it is used

No documented product use was verified in the last source check.

What people are saying

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Also in these discussions

derbyjs/derby · linked in 3 of the same discussions
automerge/automerge · linked in 2 of the same discussions
derbyjs/racer · linked in 2 of the same discussions

Mentioned in the same Hacker News threads. That is not proof they are substitutes.

This week on Hacker News

Nov 7–Nov 14 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/14/2026, 7:02:50 PM UTC.

No direct repository links were found in the indexed HN discussions over the past seven days. Older discussions are available below.

Mentions over time

HN mentions by year24 dated mentions

Observed mentions: 2016-08-02 23:41:16 UTC to 2021-09-23 17:21:44 UTC.

Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.

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Period	Start (UTC)	End (exclusive, UTC)	Mentions	Submissions	Comments
2016	2016-01-01 00:00:00 UTC	2017-01-01 00:00:00 UTC	6	0	6
2017	2017-01-01 00:00:00 UTC	2018-01-01 00:00:00 UTC	2	0	2
2018	2018-01-01 00:00:00 UTC	2019-01-01 00:00:00 UTC	3	0	3
2019	2019-01-01 00:00:00 UTC	2020-01-01 00:00:00 UTC	7	1	6
2020	2020-01-01 00:00:00 UTC	2021-01-01 00:00:00 UTC	5	0	5
2021	2021-01-01 00:00:00 UTC	2022-01-01 00:00:00 UTC	1	0	1

What Hacker News says

3 sources

drzaiusx11·Dec 7, 2018

Looking forward to it! I've been evaluating ShareDB[1] for a Google Docs-like and it seems promising. The OT space is really interesting. For those wanting to read more about it, check out the paper: "Operational transformation in real-time group editors: issues, algorithms, and achievements"[2] [1] https://github.com/share/sharedb [2] http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.53....

In Repl.it Multiplayer

houshuang·Feb 5, 2018

[ShareDB](https://github.com/share/sharedb) is the most commonly used, we use it extensively - also has bindings to rich text or code editors. [Y-js](http://y-js.org/) is a more academic project, also based on CRDTs I think.

In Automerge: JSON-like data structure for building collaborative apps

kba·Feb 5, 2018

Then there'd be a negative amount of apples. It's not impossible if you disregard context. There is nothing new about doing things like this, OT and CRDT have existed for ages. Check out ShareDB (https://github.com/share/sharedb) or Webstrates (https://webstrates.net/) (based on ShareDB). In Webstrates, we don't have merge conflicts that need to be resolved and there are never any practical synchronization issues. The server orders the operation and if you try to delete something that's already been deleted, then we just ignore your operation. Also quite courageous to say something is impossible when you have the code that does it right in front of you. ;-)

In Automerge: JSON-like data structure for building collaborative apps