Is DuckDB or Refact better?

Neither clearly leads. DuckDB starts at Free and Refact at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.

Which is cheaper, DuckDB or Refact?

DuckDB starts at Free and Refact at Free.

Does DuckDB or Refact run on more platforms?

DuckDB runs on Linux, macOS, Windows, WebAssembly. Refact runs on VS Code, Web.

Can I use DuckDB for free?

Both have a free tier, so you can try either at no cost before committing.

What is DuckDB best used for?

DuckDB is most often used for transformation steps in a data pipeline that would otherwise need spark, replaced by sql over parquet in a single process, analytical queries embedded in an application or a dashboard where shipping a database server alongside it is not acceptable, local exploration of files that are too large for a pandas dataframe but far too small to justify a warehouse, continuous integration and testing of analytical sql, where a real engine can run in the test process without provisioning anything. Of those, transformation steps in a data pipeline that would otherwise need spark, replaced by sql over parquet in a single process and analytical queries embedded in an application or a dashboard where shipping a database server alongside it is not acceptable are not what Refact is typically brought in for.

What can DuckDB do that Refact cannot?

DuckDB covers In-process execution, Vectorised columnar engine, Direct file querying, Zero dependencies. Refact covers Autonomous agent workflows, IDE chat, Real-time code completions, GitHub integration.

Databases · head to head

DuckDB vs Refact

DuckDB

Databases

MIT-licensed analytical SQL database that runs inside your process, with no server, no dependencies and one writer at a time.

From: Free
Rated: -

Full review Website

Refact

Developer Tools

Autonomous AI coding agent for development tasks

From: Free
Rated: -

Full review Website

The short version

Each has a real cost: DuckDB a database file accepts one read-write process at a time; other processes must open it read-only and will not see subsequent writes, so DuckDB cannot be the shared database behind several services.; Refact requires configuration for optimal performance
They diverge on capability: DuckDB covers In-process execution, Refact covers Autonomous agent workflows.
Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which DuckDB and Refact actually diverge.

Attributes where DuckDB and Refact differ
Attribute	DuckDB	Refact
Pricing model	open-source	Freemium with paid tiers
Platforms	Linux, macOS, Windows, WebAssembly	VS Code, Web
Category	Databases	Developer Tools
Founded	2019	2023

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in DuckDB

In-process execution
Vectorised columnar engine
Direct file querying
Zero dependencies
Larger-than-memory queries
MIT licence
Postgres-flavoured SQL
Extension ecosystem

Only in Refact

Autonomous agent workflows
IDE chat
Real-time code completions
GitHub integration
Database integration
On-premise deployment
Multi-LLM support
25+ language support

What people use each for

The jobs each tool is most often brought in to do.

DuckDB

Transformation steps in a data pipeline that would otherwise need Spark, replaced by SQL over Parquet in a single processnot Refact
Analytical queries embedded in an application or a dashboard where shipping a database server alongside it is not acceptablenot Refact
Local exploration of files that are too large for a pandas dataframe but far too small to justify a warehousenot Refact
Continuous integration and testing of analytical SQL, where a real engine can run in the test process without provisioning anythingnot Refact

Refact

Autonomous code generation for development tasksnot DuckDB
End-to-end bug fixes and refactoringnot DuckDB
Multi-language software development accelerationnot DuckDB
Enterprise development with data privacy requirementsnot DuckDB

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

DuckDB

A database file accepts one read-write process at a time; other processes must open it read-only and will not see subsequent writes, so DuckDB cannot be the shared database behind several services.
There is no network protocol, authentication or user management, so exposing it to remote clients means writing and securing your own service around it.
It is built for scans and aggregations, not for many small transactions, so a workload of high-frequency single-row inserts and updates performs badly compared with SQLite or Postgres.
Storage files are backwards compatible but not forwards compatible, so a file written by a newer version cannot be read by an older one and every consumer of a shared file must be upgraded together.
Query memory settings matter: some operations still need to hold significant state, so an under-configured memory limit turns a large join or a high-cardinality aggregation into a spill-heavy query or an out-of-memory failure rather than a slow success.

Refact

Requires configuration for optimal performance
On-premise deployment adds operational complexity
Free tier limited by daily agent request quota
Coin system adds complexity to cost calculation

Pricing, plan by plan

DuckDB

Free

No published plan breakdown. See the DuckDB review.

Refact

Free

FreeFree
- Limited daily agent usage
- Unlimited completions
- 2,000 coins for agent and chat
Pro$10/month
- 40 daily agent requests
- 64k context window
- 10,000 coins monthly
Enterprise$undefined/custom
- On-premise deployment
- Custom coin allocation
- Fine-tuning support

Which should you pick?

Choose DuckDB if

You need in-process execution.
You want to start without paying.
You work on Linux, macOS, Windows, WebAssembly.
You also want vectorised columnar engine.

DuckDB review

Choose Refact if

You need autonomous agent workflows.
You want to start without paying.
You work on VS Code, Web.
You also want ide chat.

Refact review

Questions people ask

Is DuckDB or Refact better?: Neither clearly leads. DuckDB starts at Free and Refact at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, DuckDB or Refact?: DuckDB starts at Free and Refact at Free.
Does DuckDB or Refact run on more platforms?: DuckDB runs on Linux, macOS, Windows, WebAssembly. Refact runs on VS Code, Web.
Can I use DuckDB for free?: Both have a free tier, so you can try either at no cost before committing.
What is DuckDB best used for?: DuckDB is most often used for transformation steps in a data pipeline that would otherwise need spark, replaced by sql over parquet in a single process, analytical queries embedded in an application or a dashboard where shipping a database server alongside it is not acceptable, local exploration of files that are too large for a pandas dataframe but far too small to justify a warehouse, continuous integration and testing of analytical sql, where a real engine can run in the test process without provisioning anything. Of those, transformation steps in a data pipeline that would otherwise need spark, replaced by sql over parquet in a single process and analytical queries embedded in an application or a dashboard where shipping a database server alongside it is not acceptable are not what Refact is typically brought in for.
What can DuckDB do that Refact cannot?: DuckDB covers In-process execution, Vectorised columnar engine, Direct file querying, Zero dependencies. Refact covers Autonomous agent workflows, IDE chat, Real-time code completions, GitHub integration.

Answered from the vendors’ own pages

DuckDB: Can multiple applications share one DuckDB database?

Not for writing. One process holds the database read-write; others may attach read-only and will not see later writes. Shared multi-writer access needs a different database or a table format with a catalogue.

Refact: How many programming languages does Refact support?

Refact supports 25+ programming languages including Python, JavaScript, Go, Rust, Java, C++, and many others.

Source

DuckDB: Is it a replacement for a data warehouse?

For single-node analytical workloads up to a few hundred gigabytes it very often is. It is not a replacement when many concurrent users need a shared, governed, always-on service.

Refact: Can I deploy Refact on-premises?

Yes. Refact offers on-premise deployment options for organizations requiring complete data control and privacy.

Source

DuckDB: Do I have to load data into it?

No. It queries Parquet, CSV, JSON and Arrow in place, including on object storage. Its own storage format is optional and mainly useful when you want indexes, constraints and faster repeated access.

Refact: What LLMs does Refact support?

Refact works with multiple LLMs including Claude, GPT-4, and open-source models, giving you flexibility in model selection.

Source

DuckDB: What is MotherDuck's relationship to it?

MotherDuck is a separate company offering a managed and hybrid service built on the DuckDB engine. DuckDB itself remains MIT-licensed and independent of it, with the IP held by the DuckDB Foundation.

DuckDB: Is it suitable for OLTP?

No. It is designed for analytical scans. For transactional workloads with frequent small writes, SQLite or Postgres is the right tool.

DuckDB vs Refact

DuckDB

Refact

The short version

Where they differ

What each one covers

Only in DuckDB

Only in Refact

What people use each for

DuckDB

Refact

Where each one falls short

DuckDB

Refact

Pricing, plan by plan

DuckDB

Refact

Which should you pick?

Choose DuckDB if

Choose Refact if

Questions people ask

Answered from the vendors’ own pages

Related pages

More on DuckDB

More on Refact

Keep looking

Other head to heads