Is DuckDB or Kong better?

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

Which is cheaper, DuckDB or Kong?

DuckDB starts at Free and Kong at Free.

Does DuckDB or Kong run on more platforms?

DuckDB runs on Linux, macOS, Windows, WebAssembly. Kong runs on Linux, Docker, Kubernetes.

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 Kong is typically brought in for.

What can DuckDB do that Kong cannot?

DuckDB covers In-process execution, Vectorised columnar engine, Direct file querying, Zero dependencies. Kong covers API Gateway, Authentication & Authorization, Rate Limiting, Kubernetes.

Databases · head to head

DuckDB vs Kong

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

Kong

APIs

Cloud-native API gateway and service connectivity platform

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.; Kong the Plus plan includes 1M API requests a month and charges $200 a month for each additional million
They diverge on capability: DuckDB covers In-process execution, Kong covers API Gateway.
Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which DuckDB and Kong actually diverge.

Attributes where DuckDB and Kong differ
Attribute	DuckDB	Kong
Pricing model	open-source	subscription
Platforms	Linux, macOS, Windows, WebAssembly	Linux, Docker, Kubernetes
Category	Databases	APIs
Founded	2019	2010

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 Kong

API Gateway
Authentication & Authorization
Rate Limiting
Kubernetes
Consul
Eureka
PostgreSQL
Linux 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 Kong
Analytical queries embedded in an application or a dashboard where shipping a database server alongside it is not acceptablenot Kong
Local exploration of files that are too large for a pandas dataframe but far too small to justify a warehousenot Kong
Continuous integration and testing of analytical SQL, where a real engine can run in the test process without provisioning anythingnot Kong

Kong

API gateway management and routingnot DuckDB
API development and testingnot DuckDB
Enterprise API security and governancenot 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.

Kong

The Plus plan includes 1M API requests a month and charges $200 a month for each additional million
Plus is capped at 10M requests a month, so growth past that forces an Enterprise contract
Plus limits published APIs to 20 and includes one Developer Portal, with a second at $200 a month
SSO and audit logging are Enterprise only
Enterprise pricing is custom and billed annually

Pricing, plan by plan

DuckDB

Free

No published plan breakdown. See the DuckDB review.

Kong

Free

Kong Konnect Free TrialFree
- 30-day free trial
- Full enterprise functionality
- Unlimited gateways
Kong Konnect Plus$null/month
- Per gateway pricing billed monthly
- Up to 5 Serverless Gateways, 2 Hybrid, 2 Dedicated Cloud Gateways
- 1M API requests included per month
Kong Insomnia EssentialsFree
- Unlimited projects and CLI access
- Up to 3 Git Sync users
- 1,000 mock server requests per month
Kong Insomnia Pro$12/month
- Unlimited users with Git Sync access
- Unlimited organizations
- RBAC

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 Kong if

You need api gateway.
You want to start without paying.
You work on Linux, Docker, Kubernetes.
You also want authentication & authorization.

Kong review

Questions people ask

Is DuckDB or Kong better?: Neither clearly leads. DuckDB starts at Free and Kong at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, DuckDB or Kong?: DuckDB starts at Free and Kong at Free.
Does DuckDB or Kong run on more platforms?: DuckDB runs on Linux, macOS, Windows, WebAssembly. Kong runs on Linux, Docker, Kubernetes.
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 Kong is typically brought in for.
What can DuckDB do that Kong cannot?: DuckDB covers In-process execution, Vectorised columnar engine, Direct file querying, Zero dependencies. Kong covers API Gateway, Authentication & Authorization, Rate Limiting, Kubernetes.

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.

Kong: Does Kong offer a free trial?

Yes, Kong Konnect offers a 30-day free trial with full enterprise functionality, unlimited gateways, and no credit card required.

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.

Kong: How much does Kong Insomnia Pro cost?

Kong Insomnia Pro is $12 per user per month with 15% savings available for annual billing.

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.

Kong: What are Kong Konnect Plus API request limits?

Kong Konnect Plus includes 1M API requests per month; additional requests cost $200 per 1M (maximum 10M per month).

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.

Kong: What is included in Kong Insomnia Enterprise?

Kong Insomnia Enterprise is $45 per user per month with SSO, SCIM, vault integrations, unlimited mock server requests, and Konnect integration.

Source

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 Kong

DuckDB

Kong

The short version

Where they differ

What each one covers

Only in DuckDB

Only in Kong

What people use each for

DuckDB

Kong

Where each one falls short

DuckDB

Kong

Pricing, plan by plan

DuckDB

Kong

Which should you pick?

Choose DuckDB if

Choose Kong if

Questions people ask

Answered from the vendors’ own pages

Related pages

More on DuckDB

More on Kong

Keep looking

Other head to heads