648 Open Core Companies

Rank Name Commercializing Stage
1
LLVM, PyTorch, Tensorflow, ONNX, Core ML Tools Venture / Series A
2
Linux, OpenShift, Kubernetes, Apache Camel, Podman, Ansible, 389 Directory Server, Apache CFX, Apache ActiveMQ Public
2
Linux, Rancher, NeuVector, K3s, Harvester Private / Private Equity
2
Linux Private / SMB
5
OpenShift, Kubernetes, MariaDB, Apache Cassandra, PostgreSQL, Redis, Jupyter Notebook, Citus, MySQL Public
5
OpenShift, Grafana, MongoDB, Apache Airflow, Apache Spark, Kubernetes, Prometheus, Apache Kafka, Apache Flink, OpenSearch, Presto, Apache Cassandra, PostgreSQL, Redis, Apache TinkerPop, AWS OpenTelemetry (OTEL), Jupyter Notebook, FreeRTOS, MySQL Public
5
IBM
OpenShift, Kubernetes, Calico, containerd, cri-o, Jupyter Notebook, runc Private / SMB
8
Rust, vLLM, PostgreSQL, Tembo, pgmq, Trunk (Postgres), pgvector, pg_vectorize, pg_tier, Tembo Self Hosted, pg_auto_dw Venture / Series A
9
PyTorch, ClickHouse, Tensorflow, YDB, Elasticsearch, Kubernetes, Gitlab, Apache Kafka, Apache Hadoop, Apache Hive, Apache HBase, Greenplum Database, PostgreSQL, Jupyter Notebook, Apache Zepplin, MySQL Public
10
ClickHouse Venture / Series B
10
ClickHouse, Grafana, Apache Kafka, Apache Flink, OpenSearch, Apache Cassandra, PostgreSQL, Redis, InfluxDB, MySQL, M3 Venture / Series D+
10
ClickHouse Venture / Seed
10
ClickHouse Venture / Seed
14
Godot Venture / Seed
15
OpenTelemetry (OTEL) Venture / Series C
15
OpenTelemetry (OTEL) Venture / Seed
15
OpenTelemetry (OTEL), Prometheus, PostgreSQL, TimescaleDB Venture / Series C
15
OpenTelemetry (OTEL) Venture / Series D+
15
OpenTelemetry (OTEL), BindPlane OP Venture / Seed
20
Grafana, Prometheus, Grafana Mimir, Grafana Loki, Grafana Tempo, Cortex for Prometheus, Grafana Faro Web SDK, Grafana Phlare Venture / Series D+