Top 6 C NoSQL Projects

Redis

318 64,705 9.7 C

Redis is an in-memory database that persists on disk. The data model is key-value, but many different kind of values are supported: Strings, Lists, Sets, Sorted Sets, Hashes, Streams, HyperLogLogs, Bitmaps.

Project mention: Valkey Is Rapidly Overtaking Redis | news.ycombinator.com | 2024-04-19

One of the challenges Redis labs here have is that there's very little reason for their userbase to stay loyal to them.
antirez retired from Redis development a few years ago.
From https://github.com/redis/redis/graphs/contributors it looks like activity since he left has been mostly from people who didn't overlap with him much.
Redis Labs have not shown themselves to be outstanding stewards of the project as far as I can tell. Why shouldn't people support the fork?

valkey

7 11,199 8.3 C

A new project to resume development on the formerly open-source Redis project. We're calling it Valkey, since it's a twist on the key-value datastore.

Project mention: Valkey Is Rapidly Overtaking Redis | news.ycombinator.com | 2024-04-19

Changelog line items is probably a better measure (assuming the line items are aligned to features and bugfixes and not just a list of PRs) https://github.com/valkey-io/valkey/releases
Maybe version number/release cadence is also helpful.

WorkOS

workos.com sponsored

The modern identity platform for B2B SaaS. The APIs are flexible and easy-to-use, supporting authentication, user identity, and complex enterprise features like SSO and SCIM provisioning.
dynomite

3 4,161 0.0 C

A generic dynamo implementation for different k-v storage engines
RedisGraph

5 1,959 8.2 C

A graph database as a Redis module

Project mention: Matrices and Graph | news.ycombinator.com | 2023-07-15

This approach reminds me of RedisGraph[1] (which is now unfortunately EoL).
"RedisGraph is the first queryable Property Graph database to use sparse matrices to represent the adjacency matrix in graphs and linear algebra to query the graph."
1. https://github.com/RedisGraph/RedisGraph

ejdb

3 1,427 5.6 C

:snowboarder: EJDB2 — Embeddable JSON Database engine C library. Simple XPath like query language (JQL).
MongoDB C Driver

2 794 9.4 C

The Official MongoDB driver for C language

Project mention: MongoDB $weeklyUpdate #122 (June 30, 2023): Databricks, Change Streams, & Terraform | dev.to | 2023-06-30

We're pleased to announce the release of the MongoDB C Driver (libmongoc) 1.24.0 and C++ Driver (mongocxx) 3.8.0 with support for MongoDB 7.0 and a host of new security features. Check out the release notes for more details:

NOTE: The open source projects on this list are ordered by number of github stars. The number of mentions indicates repo mentiontions in the last 12 Months or since we started tracking (Dec 2020).