A Guide to ClickHouse® Window Functions
Learn ClickHouse® Window Functions with simple examples — ROW_NUMBER, RANK, SUM, AVG, LAG, LEAD, and more. A beginner-friendly guide to analytical SQL.
Jun 27, 2026ClickHouse® Experts · Privacy-Focused Product Builders
We build the tools we wish existed. Then we run them in production.
Quantrail™ Data delivers end-to-end ClickHouse® database services, from architecture and migration to performance tuning and 24/7 managed operations, and builds privacy-focused software and AI products that run on infrastructure you own, starting with CHOps.
Open-source first Your cloud or on-prem End-to-end ClickHouse® database No vendor lock-in
What we build
Products and services from one engineering team
We provide end-to-end ClickHouse® database services and build the privacy-focused products that make data work easier.
ClickHouse® database, end to end
Architecture, migration, performance tuning, and 24/7 managed operations on infrastructure you own. We do not hand you a runbook and walk away. We run it alongside your team, from the first cluster to petabyte scale.
See our ClickHouse® servicesCHOps: our ClickHouse® admin tool
We got tired of managing the ClickHouse® database with a patchwork of tools, so we built one. CHOps brings monitoring, query profiling, backups, RBAC, and alerting into a single interface. Free, open-source, self-hosted, and zero agents on your servers.
Discover CHOpsPrivacy-focused AI products
AI you do not have to hand your data to. We build privacy-focused AI products on a simple principle: your data and your work stay yours. Made for teams who would rather own their tools than rent them. More to come.
Get in touchCapabilities
ClickHouse® and data engineering, done right
From the first pipeline to petabyte-scale analytics, we cover the full data lifecycle, plus the software around it.
Managed ClickHouse® database
Deployment, tuning, and 24/7 operations for ClickHouse® database clusters delivering sub-second queries at petabyte scale, on any cloud or on-prem.
Data pipelines & ETL
Reliable, automated data pipelines with Apache Airflow, Kafka, and dbt that keep your analytics fresh and trustworthy.
Analytics platforms
Real-time dashboards and analytics infrastructure your team can rely on, built on open-source foundations.
Cloud & Kubernetes
Run on AWS, GCP, Azure, bare metal, or Kubernetes, with full data ownership and no vendor lock-in.
Software & private AI
Custom software and privacy-focused AI applications, built and operated by the team that designed them.
24/7 managed operations
Around-the-clock monitoring, performance tuning, and incident response so your data platform never sleeps.
Why Quantrail
We are not consultants who left. We are the team that builds and operates.
Product-grade engineering
We hold ourselves to the standard of software we ship and run in production, not slide decks. The same rigor goes into every service engagement.
Your data, your infrastructure
Everything runs in your environment on open-source foundations. No lock-in, no proprietary tax, no surprises.
Skin in the game
We own outcomes, from the first migration to the 2 a.m. page. We work as an extension of your team for the long run.
From the blog
Recent articles
Building Dashboards with ClickHouse® and Apache Superset
Learn how to build interactive analytics dashboards using ClickHouse® and Apache Superset, including architecture, optimization, and performance considerations.
Jun 27, 2026
ClickHouse® Join Types and Performance Implications
Learn how different ClickHouse® JOIN types work, their performance implications, and best practices for optimizing analytical queries at scale.
Jun 27, 2026
ClickHouse® Memory Management and Tuning
Learn how ClickHouse® manages memory during query execution, practical tuning strategies to optimize performance and prevent out-of-memory errors in production.
Jun 27, 2026
Exploring ClickHouse® System Tables for Troubleshooting
Learn how to use ClickHouse® system tables to monitor server health, analyze queries, track background operations, and troubleshoot performance issues.
Jun 27, 2026
Using ClickHouse® for Log Analysis and Observability
Learn how ClickHouse® powers scalable log analysis and observability. Explore architecture, schema design, ingestion pipelines and practical limitations.
Jun 27, 2026
ClickHouse® 26.6 Deep Dive
Explore the key features in ClickHouse® 26.6, including streaming queries, MPP execution, geospatial analytics, and performance improvements.
Jun 26, 2026
Dealing with Duplicates in ClickHouse®: Deduplication Strategies
Learn practical ClickHouse® deduplication strategies using ReplacingMergeTree, FINAL, and ingestion best practices
Jun 26, 2026
How ClickHouse® Powers Real-Time Analytics
Learn how to implement real-time analytics with ClickHouse. Explore real-time data pipelines, ingestion, schema design for building scalable analytical systems.
Jun 26, 2026FAQ
Frequently asked questions
Quick answers about our ClickHouse® database services, CHOps, and privacy-focused AI products.
What does Quantrail Data do?
Quantrail Data provides end-to-end ClickHouse® database services and builds privacy-focused software and AI products. Our flagship product is CHOps, an open-source ClickHouse® database admin tool, and we also offer architecture, migration, performance tuning, and managed operations.
Do you provide end-to-end ClickHouse® database services?
Yes. We cover the full ClickHouse® database lifecycle: architecture and schema design, migration, performance tuning, monitoring, backups, security, and 24/7 managed operations, on infrastructure you own across public cloud, private cloud, bare metal, or Kubernetes.
What is CHOps?
CHOps is our open-source ClickHouse® database admin tool. It brings monitoring, a SQL editor, query profiling with flame graphs, dashboards, backups, visual RBAC, and alerting into a single self-hosted interface, with no agents required on your database servers.
Do you build AI products?
Yes. We build privacy-focused AI products designed so your data and your work stay yours, running on infrastructure you control rather than sent to a third party. We share more as each product nears launch.
Do you manage the ClickHouse® database in our own cloud?
Yes. We run and manage the open-source ClickHouse® database on your infrastructure, whether that is public cloud (AWS, GCP, Azure), private cloud, bare metal, or Kubernetes. You keep full ownership of your data and accounts.
How do we get started?
Reach out through our contact form. We start with a short discovery conversation about your ClickHouse® database, software, or AI challenge, then map out a clear plan and take ownership of delivery.
Contact
Let's build something that lasts
Tell us about your ClickHouse® database, the software you want built, or where your data is getting in the way, and our engineers will get back to you with a clear next step.