​​immudb is a lightweight, high-speed immutable database for systems and applications. Written in #go. With immudb you can track changes in sensitive data in your transactional databases and then record those changes permanently in a tamperproof immudb database. This allows you to keep an indelible history of sensitive data, for example debit/credit card transactions.

Traditional DB transactions and logs are hard to scale and are mutable. So there is no way to know for sure if your data has been compromised.

As such, immudb provides unparalleled insights retroactively of changes to your sensitive data, even if your perimeter has been compromised. immudb guarantees immutability by using a Merkle tree structure internally.

immudb gives you the same cryptographic verification of the integrity of data written with SHA-256 like a classic blockchain without the cost and complexity associated with blockchains today.

- immudb is immutable. You can add records, but never change or delete records.
- Data stored in immudb is cryptographically coherent and verifiable, like blockchains, just without all the complexity and at high speed.
- Anyone can get started with immudb in minutes. Whether you're using node.js, Java, Python, Go, .Net, or any other language. It's very easy to use and you can have your immutable database running in just a few minutes.
- Finally, immudb is Open Source. You can run it on premise, or in the cloud. It's completely free. immudb is governed by the Apache 2.0 License

https://github.com/codenotary/immudb