Comparison

Express vs Ktor

On the evidence we track, Express leads this comparison with a composite score of 77/100. Scores are only directly comparable because these tools share a category; the full breakdown and every source is below.

Express full profile →Ktor full profile →

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★Express77

Ktor61

Attribute comparison across 2 tools
Attribute	ExpressLeader	Ktor
Vioscale score	77 / 100high · 79%	61 / 100low · 49%
Pricing
Free tierpricing.free_tier	✓	✓
Modelpricing.model	commercial	open_source
Price levelpricing.price_level	free	free
Transparentpricing.transparent	✓	-
Integrations
Countintegrations.count	13	-
Security
Disclosure policysecurity.disclosure_policy	✓	-
Scorecardsecurity.scorecard	8.9	4.6
Vulnerabilitiessecurity.vulnerabilities	Count: 6 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=express&per_page=100 · Last 12m: 1 · Max severity: MODERATE	Count: 1 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=maven&package_name=io.ktor%3Aktor-client-cio&per_page=100 · Last 12m: 0 · Max severity: LOW
Adoption
Dependent reposadoption.dependent_repos	1,853,938	1,171
Github starsadoption.github_stars	69,394	14,503
Package downloads weeklyadoption.package_downloads_weekly	131,895,868	-
Stackoverflow questionsadoption.stackoverflow_questions	96,000	-
Activity
Commits last 30dactivity.commits_last_30d	40	57
Release
Cadence daysrelease.cadence_days	4	27
Historyrelease.history	20 items	20 items
License
Spdxlicense.spdx	MIT	Apache-2.0
Language
Primarylanguage.primary	JavaScript	Kotlin
Market
Availabilitymarket.availability	Available worldwide · Popular in US · HQ US	-
Content
Faqcontent.faq	7 items	-

Score

Vioscale score

Express77 / 100high · 79%

Ktor61 / 100low · 49%

Pricing

Free tier

Express✓

Ktor✓

Model

Expresscommercial

Ktoropen_source

Price level

Expressfree

Ktorfree

Transparent

Express✓

Ktor–

Integrations

Count

Express13

Ktor–

Security

Disclosure policy

Express✓

Ktor–

Scorecard

Express8.9

Ktor4.6

Vulnerabilities

ExpressCount: 6 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=express&per_page=100 · Last 12m: 1 · Max severity: MODERATE

KtorCount: 1 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=maven&package_name=io.ktor%3Aktor-client-cio&per_page=100 · Last 12m: 0 · Max severity: LOW

Adoption

Dependent repos

Express1,853,938

Ktor1,171

Github stars

Express69,394

Ktor14,503

Package downloads weekly

Express131,895,868

Ktor–

Stackoverflow questions

Express96,000

Ktor–

Activity

Commits last 30d

Express40

Ktor57

Release

Cadence days

Express4

Ktor27

History

Express20 items

Ktor20 items

License

Spdx

ExpressMIT

KtorApache-2.0

Language

Primary

ExpressJavaScript

KtorKotlin

Market

Availability

ExpressAvailable worldwide · Popular in US · HQ US

Ktor–

Content

Faq

Express7 items

Ktor–

Capabilities

Feature-by-feature on the axes that matter for web frameworks. “-” means undocumented, not absent.

Capability comparison for Web Frameworks
Capability	Express	Ktor
Core
Rendering model	-	-
File-based routing	✗	-
Language	JavaScript	Kotlin
Rendering
Server components	✗	-
Streaming SSR	✗	-
Fullstack
Built-in API / backend routes	✓	-
DX
First-class TypeScript	✗	-
Fast refresh / HMR	✗	-
Deployment
Edge runtime support	✗	-

Core

Rendering model

Express-

Ktor-

File-based routing

Express✗

Ktor-

Language

ExpressJavaScript

KtorKotlin

Rendering

Server components

Express✗

Ktor-

Streaming SSR

Express✗

Ktor-

Fullstack

Built-in API / backend routes

Express✓

Ktor-

First-class TypeScript

Express✗

Ktor-

Fast refresh / HMR

Express✗

Ktor-

Deployment

Edge runtime support

Express✗

Ktor-

What each one is

The product in its own terms, so the numbers below have context.

Express

Leader

A minimal framework providing essential routing, middleware, and HTTP utilities for building web applications and APIs in Node.js without imposing architectural constraints.

Independently observed

Ktor

Ktor is an open-source framework for creating asynchronous server and client applications, from microservices to HTTP clients. Built on Kotlin and coroutines, it emphasizes simplicity, lightweight design, and extensibility.

Independently observed

Pricing

List pricing as published by each vendor, with the date we read it. Always verify at the source before you buy.

Express

Leader

Open sourceFree tier

as of 2026-08-14verify ↗

Ktor

Open sourceFree tier

as of 2026-08-13verify ↗

Platform & deployment

Where each product runs and how it can be hosted. A dash means undocumented, not unsupported.

Platform and deployment support comparison
Supports	Express	Ktor
WebPlatforms	✓	-
CLIPlatforms	✓	-
Cloud / SaaSDeployment	✓	-
Self-hostedDeployment	✓	-
On-premiseDeployment	✓	-

Platforms

Web

Express✓

Ktor–

CLI

Express✓

Ktor–

Deployment

Cloud / SaaS

Express✓

Ktor–

Self-hosted

Express✓

Ktor–

On-premise

Express✓

Ktor–

Integrations

What each product connects to. Counts come from the vendor's own integration directory where one exists.

Express

Leader

13 total

Cassandra
Couchbase
CouchDB
LevelDB
MySQL
MongoDB
Neo4j
Oracle
PostgreSQL
Redis
SQL Server
SQLite
Elasticsearch

Independently observed

Ktor

Not documented yet.

Comparison generated from independently-sourced facts. Every value links to its source and retrieval date. See the method.