Databases for Ledger & accounting

Purpose-built financial transactions database: double-entry accounts and transfers at very high throughput.

Immutable, tamper-evident database with cryptographic proofs, offering key-value, SQL and document APIs.

Blockchain-style database combining MongoDB storage with Tendermint BFT consensus; dormant since 2020.

Immutable Datalog database from Nubank where every fact is timestamped and queries run in the app process.

Serverless, active-active distributed SQL on AWS with PostgreSQL compatibility and no instances to size.

Bitemporal SQL database on object storage that keeps every version of every row.

Byzantine-fault-tolerant, blockchain-backed SQL database built on SQLite; dormant since 2021.

Header-only C++11 append-only key-value store tuned for random reads on SSDs, built for the XRP Ledger.

Managed horizontal sharding for Aurora PostgreSQL: one endpoint over a serverless group of shards.

Tencent's financial-grade MySQL-compatible database family: distributed TDSQL and cloud-native TDSQL-C.

Postgres-wire distributed SQL built to survive node, zone and region failures with serializable transactions.

Microsoft's always-current managed SQL Server engine, from free serverless databases to 128 TB Hyperscale.

Alipay-proven distributed SQL with MySQL (and Oracle, in Enterprise) compatibility, HTAP and vector search.

Immutable RDF graph database with time travel, git-style branching, SPARQL, JSON-LD and Cypher.

Compact German SQL RDBMS from Transaction Software, with a Z-curve multidimensional index (Hypercube).