AlaSQL Alternatives

Underscore.js is a free and open-source JavaScript library that provides over 100 functional programming helpers without extending any built-in objects. Underscore.js can be used for function binding, javascript templating, creating quick indexes, deep equality testing, and much more.

TaffyDB is a free and open source, Pure-JavaScript database abstraction that stores data in JSON format. TaffyDB provides INSERT, DELETE, GET (SELECT)  and JOIN methods to execure the data similar to that of traditional relational SQL databases. TaffyDB allows you to quickly setup an in-memory database that can be used in the same fashion as an SQLite database would, without configuration and a database server running.

PouchDB is a free and open-source JavaScript database inspired by Apache CouchDB. The database is designed from the ground-up to run well within modern web browsers. With PouchDB you can create web applications that works as well offline as they do online. PouchDB achives this by storing data locally, then synchronize it with CouchDB and compatible servers when the user get internet access once again. This is especially useful for applications facing countries and regions with lower quality internet connections or unstable infrastructure.

LevelDB is a free and open-source key-value storage library developed by Google. LevelDB provides on-disk storage and ordered mapping of string keys to string values. With LevelDB data is stored and sorted by key, and the keys and values are arbitrary byte arrays. The library will also automatically compress files using the Snappy compression library to optimize for storage capacity.

DuckDB is an embeddable SQL OLAP database management system. It provides developers with serious data management features such as extensive support for complex SQL queries and a large function library, with windwed functions. DuckDB is also ACID compliant and proivides transactional guarantees through custom, bulk-optimized MVCC. DuckDB is released fully open source under the permissive MIT Licens. The entire source code of DuckDB is freely available on GitHub