Neo4j.

Leading graph database for connected-data applications, originally from Sweden

Facts

Aiven
Managed open-source data infrastructure (PostgreSQL, Kafka, OpenSearch) in the cloud
FI · commercial
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CrateDB
Distributed SQL database optimised for machine data and IoT applications
AT · open-source
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DuckDB
In-process analytical database, the SQLite for OLAP, developed in the Netherlands
NL · open-source
↗
Exasol
In-memory analytics database for high-performance data analysis and warehousing
DE · commercial
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MariaDB
open-source relationele database, community-gedreven fork by MySQL
FI · open-source
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Meilisearch
Open-source search engine written in Rust, fast and easy to integrate
FR · open-source
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SAP HANA
In-memory column-store database by SAP for real-time analytics and transaction processing
DE · commercial
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TimescaleDB
Open-source time-series database as PostgreSQL extension for time-series workloads
SE · open-source
↗