I went on their website and tried to understand how immutability is enforced but I couldn't find anything. I'm sceptical, but particularly because they make a

I went on their website and tried to understand how immutability is enforced but I couldn't find anything. I'm sceptical, but particularly because they make a deliberate comparison to blockchain that I doubt they'll be able to deliver. The PoW immutability of e.g. BTC and ETH is strong as it yields the following guarantees for stored data: - Immutability of the BTC blockchain is protected through all cummulative work that has happened on a specific branch of the chain. Even if someone replayed BTC, it'd take millenias to recompute the work on an average machine - The immutability isn't enforced on a file level, as I suspect it is with immudb. Immutability is enforced through the network that has additionally shown to have conservative political views too. You can go, sync a BTC node and change the underlying level db. Still that won't change the network state. Immutability on a single system is physically impossible if e.g you consider deleting the file as mutation. - immudb says "it's immutable like a blockchain but less complicated", but Bitcoin isn't more complicated than some sophisticated enterprise db solution. - I think immudb should be maximally upfront what they mean by immutability: It seems they want to communicate that they're doing event sourcing - that's different from immutability Finally there's a rather esotheric argument. If you run an immutable database as an organizatiom where one individual node cannot alter the network state but you have (in)direct control over all nodes: Isn't it always mutable as you could e.g. choose to swap out consensus? So from a philosophical perspective, then immutability can truly only occur if mutability is out of an individual's control. Why do I have the authority to say this? Because I too have once worked for a database with blockchain characteristics called https://www.bigchaindb.com https://www.bigchaindb.com Edit: The best solution that also has a theoretically unlimited throughput is this toy project: https://github.com/hoytech/quadrable https://github.com/hoytech/quadrable Conceptually, it computes a merkle tree over all data and regularly commits to Ethereum. Through this commitment the data may still change locally: But then at least would be provably tampered. So I guess for databases, the artibute we can really implement is "tamper-proof".