immudb is a lightweight, high-speed immutable database for systems and applications.

With immudb you can track changes in sensitive data in your transactional databases and then record those changes indelibly in the tamperproof immudb database. This allows you to keep an indelible history of, say, your debit/credit transactions.

Traditional transaction logs are hard to scale and are not immutable. So, there is no way to know for sure if your data has been compromised.
As such, immudb retro-actively provides unparalleled insights of what happened to your sensitive data, even if your data was compromised. immudb provides the guarantee of 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 classic blockchain - without the cost and complexity associated with blockchains today.

immudb has 4 main benefits:

• immudb is immutable. You can only add records, but never change or delete them.
• Data stored in immudb is cryptographically coherent and verifiable, like blockchains, just without all the complexity and at high speed.
• Finally, immudb is Open Source. You can run it on premise, or in the cloud, and it's completely free. immudb is governed by the Apache 2.0 License.
immudb currently runs on Linux, FreeBSD, Windows, and MacOS, along with other systems derived from them, such as Kubernetes and Docker.