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ClickHouse vs Ocient

ClickHouse: Open-source columnar OLAP database known for very fast aggregations over billions of rows. Ocient: Hyperscale data warehouse on NVMe compute-adjacent storage, rebranded as the OcientAIQ platform.

key differences

  • Licensing: ClickHouse is open source (permissive) (Apache License 2.0); Ocient is proprietary (Proprietary).
  • Only ClickHouse has secondary indexes, full-text search, vector search, materialized views, ttl / expiry.
  • ClickHouse has a serverless option; Ocient does not.

choose clickhouse for

  • +Product and web analytics
  • +Log and observability backends
  • +Real-time dashboards over event streams
  • +Time-series and IoT metrics at scale

best at · Real-time analytics, OLAP, Observability

choose ocient for

  • +Telecom CDR and network analytics
  • +Ad-tech log analytics
  • +Government and defense data at PB scale

best at · Warehouse, OLAP, Real-time analytics

ClickHouseOpen-source columnar OLAP database known for very fast aggregations over billions of rows.
OcientHyperscale data warehouse on NVMe compute-adjacent storage, rebranded as the OcientAIQ platform.
overview
Primary model
Columnar / OLAP
Columnar / OLAP
Also supports
Relational, Document, Vector, Time-Series
Relational, Spatial
Type
Database engine
Database engine
Status
Active
Active
Developer
ClickHouse, Inc.
Ocient Inc.
First release
2016
2021
Latest version
26.10.2.103 (Oct 24, 2026)
–
License
Open source (permissive)Apache License 2.0
ProprietaryProprietary
Free tier
✓
—
popularity
WhichDB Score
69.8
3.8
Rank
#10
#427
GitHub stars
50.6K
–
Stack Overflow questions
2.2K
–
scale & guarantees
Comfortable data size
Massive (Multi-PB)
Massive (Multi-PB)
Horizontal scaling
Native
Native
Multi-region
Read replicas
None
ACID
Limited
Limited
Consistency
Eventual
Strong
Schema
Strict
Strict
Architecture
Distributed, Shared storage, Single node, Client server
Distributed, Client server
deployment
Self-hosted
✓
✓
Vendor-managed cloud
✓
✓
Serverless
✓
—
Embedded
—
—
Edge
—
—
Clouds
AWS, Google Cloud, Azure, Alibaba Cloud, Tencent Cloud, Aiven
AWS, Google Cloud
capabilities
Transactions
—
—
Joins
✓
✓
Secondary indexes
✓
—
Full-text search
✓
—
Vector search
✓
—
Geospatial
✓
✓
JSON
✓
✓
Change data capture
—
—
Triggers
—
—
Stored procedures
—
—
Materialized views
✓
—
TTL / expiry
✓
—
Pub/Sub
—
—
Columnar storage
✓
✓
In-memory
—
—
Durable persistence
✓
✓
Compression
✓
✓
Encryption at rest
✓
✓
Role-based access
✓
✓
Time travel
—
—
Branching
—
—
Online schema changes
✓
—
Streaming ingest
✓
✓
Offline sync
—
—
Runs in WebAssembly
—
—
interfaces
Query languages
SQL (ClickHouse dialect), PRQL, KQL (experimental)
SQL
Client languages
Python, Go, Java, JavaScript, Rust, C++, C#
Java, Python
Best for
Real-time analytics, OLAP, Observability, Warehouse
Warehouse, OLAP, Real-time analytics, Geo
Add more to this comparisonNot sure either fits? Try smart match

ClickHouse vs Ocient: FAQ

What is the difference between ClickHouse and Ocient?

ClickHouse: Open-source columnar OLAP database known for very fast aggregations over billions of rows. Ocient: Hyperscale data warehouse on NVMe compute-adjacent storage, rebranded as the OcientAIQ platform. Licensing: ClickHouse is open source (permissive) (Apache License 2.0); Ocient is proprietary (Proprietary). Only ClickHouse has secondary indexes, full-text search, vector search, materialized views, ttl / expiry. ClickHouse has a serverless option; Ocient does not.

When should I choose ClickHouse over Ocient?

Choose ClickHouse for product and web analytics; log and observability backends; and real-time dashboards over event streams. Choose Ocient for telecom CDR and network analytics; ad-tech log analytics; and government and defense data at PB scale.

Is ClickHouse or Ocient more popular?

ClickHouse ranks #10 on the WhichDB Score (69.8/100) and Ocient ranks #427 (3.8/100). Popularity is not fit: check the requirements that matter for your project.

Are ClickHouse and Ocient open source?

Yes. ClickHouse is open source. License: Apache License 2.0. No. Ocient is proprietary, closed-source software.