Best Free Data Warehouses in 2026
11 free and open-source data warehouses ordered by their Public Evidence Score. Free access filters this page; it cannot make a tool eligible to rank.
7 open-source · 4 with free tiers · Evidence as of October 12, 2026
Free Data Warehouses at a Glance
| # | Tool | Ranking Score | License | Paid Plans |
|---|---|---|---|---|
| 1 | Elasticsearch Elasticsearch is the leading distributed, RESTful, open source search and analytics engine designed for speed, horizontal scalability, reliability, and easy management. Get started for free.... | Ranking Score 62 | Free tier | Free tier |
| 2 | ClickHouse ClickHouse is a fast open-source column-oriented database management system that allows generating analytical data reports in real-time using SQL queries | Ranking Score 60 | Free (open source) | Free (open source) |
| 3 | MongoDB Get your ideas to market faster with a flexible, AI-ready database. MongoDB makes working with data easy. | Ranking Score 59 | Free tier · paid from $0.08/hour | Free tier · paid from $0.08/hour |
| 4 | PostgreSQL Advanced open-source relational database with extensibility, JSONB support, and strong SQL compliance. | Ranking Score 51 | Free (open source) | Free (open source) |
| 5 | DuckDB DuckDB is an in-process SQL OLAP database management system. Simple, feature-rich, fast & open source. | Ranking Score 50 | Free (open source) | Free (open source) |
| 6 | InfluxDB The InfluxDB is a time series database from InfluxData headquartered in San Francisco. | Ranking Score 48 | Free (open source) | Free (open source) |
| 7 | Neo4j Connect data as it's stored with Neo4j. Perform powerful, complex queries at scale and speed with our graph data platform. | Ranking Score 45 | Free (open source) · paid from $65/GB/month | Free (open source) · paid from $65/GB/month |
| 8 | TimescaleDB From the creators of TimescaleDB — the PostgreSQL platform trusted by enterprises processing trillions of metrics daily. Start a free trial or get a demo. | Ranking Score 35 | Free tier | Free tier |
| 9 | QuestDB QuestDB is a high performance, open-source, time-series database | Ranking Score 32 | Free (open source) | Free (open source) |
| 10 | Delta Lake Open-source storage framework bringing ACID transactions, schema enforcement, and time travel to data lakes — originated at Databricks, widely adopted. | Ranking Score 30 | Free (open source) | Free (open source) |
| 11 | Apache Druid Apache Druid is an open source distributed data store. | Ranking Score 28 | Free (open source) | Free (open source) |
Free & Open-Source Data Warehouses: What You Need to Know
Several cloud data warehouses offer meaningful free tiers that go beyond trial periods — enough to run analytics workloads for small teams or proof-of-concept projects without spending anything. Open-source alternatives like ClickHouse and DuckDB provide full warehouse capabilities with zero licensing cost, trading managed convenience for infrastructure control. The free tier landscape in data warehousing is particularly competitive, with major cloud providers using generous free offerings to attract teams that will eventually scale into paid plans.
What to Look For in Free Data Warehouses
Free warehouse tiers vary dramatically in what they include. Some limit compute credits (queries stop when credits run out), others limit storage, and some restrict concurrency or features like materialized views. For open-source warehouses, the "free" cost shifts to infrastructure and operations — running a production ClickHouse cluster requires meaningful engineering investment. Evaluate whether the free tier supports your actual query patterns and data volume, not just a demo workload.
All Free Data Warehouses
Elasticsearch is the leading distributed, RESTful, open source search and analytics engine designed for speed, horizontal scalability, reliability, and easy management. Get started for free....
ClickHouse is a fast open-source column-oriented database management system that allows generating analytical data reports in real-time using SQL queries
Get your ideas to market faster with a flexible, AI-ready database. MongoDB makes working with data easy.
Advanced open-source relational database with extensibility, JSONB support, and strong SQL compliance.
DuckDB is an in-process SQL OLAP database management system. Simple, feature-rich, fast & open source.
The InfluxDB is a time series database from InfluxData headquartered in San Francisco.
Connect data as it's stored with Neo4j. Perform powerful, complex queries at scale and speed with our graph data platform.
From the creators of TimescaleDB — the PostgreSQL platform trusted by enterprises processing trillions of metrics daily. Start a free trial or get a demo.
QuestDB is a high performance, open-source, time-series database
Open-source storage framework bringing ACID transactions, schema enforcement, and time travel to data lakes — originated at Databricks, widely adopted.
Apache Druid is an open source distributed data store.
Frequently Asked Questions
What is the best free data warehouses in 2026?
Elasticsearch has the most verifiable public evidence among 11 free data warehouses, with a Public Evidence Score of 62. ClickHouse and MongoDB also rank highly. This measures the weight of public evidence, not which tool is best for your requirements.
What is the difference between free and open-source data warehouses?
Open-source tools (ClickHouse, PostgreSQL, DuckDB) publish their source code and can be self-hosted with no licensing restrictions. Free tools and tools with free tiers offer no-cost access but may limit features, usage, or require a paid upgrade for production workloads. Tools with free tiers, such as Elasticsearch and MongoDB, also offer paid upgrades.
How are free data warehouses ranked?
They use the same Public Evidence Score as our main rankings: 90% measured public evidence across at least two different platforms, 10% pricing accessibility. Free access is a filter for this page, not a bonus: it cannot make a tool eligible to rank, and every tool here is measured on the same evidence rule as the main list. How thoroughly we have covered a tool on this site, and the search traffic our pages receive, contribute nothing to its position. No vendor pays for placement.