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ktor vs spring-boot

ktor and spring-boot share 8 technologies: tomcat-embed-core, jakarta.servlet:jakarta.servlet-api, org.freemarker:freemarker, Thymeleaf, slf4j-simple, org.slf4j:slf4j-api, ch.qos.logback:logback-classic, and io.micrometer:micrometer-core. ktor is written in Kotlin and spring-boot in Java.

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What they share and what sets them apart

ktorio

ktor

Framework for quickly creating connected applications in Kotlin with minimal effort

Kotlin14.6kRead on November 9, 2026, at commit f5d66c2What is ktor built with?

Only in ktor

  • Ktor
  • apacheds-server-integ
  • org.apache.directory.server:apacheds-core-integ
  • http2-server
  • jetty-alpn-java-server
  • jetty-ee10-servlets
  • jetty-ee10-websocket-jakarta-server
  • jetty-http2-server
  • org.jetbrains.kotlin:kotlin-stdlib
  • javax.servlet:javax.servlet-api
  • org.eclipse.jetty:jetty-server
  • Tokio
  • org.eclipse.jetty:jetty-servlet
  • org.eclipse.jetty.ee10:jetty-ee10-servlet
  • java-jwt
  • jwks-rsa
  • compiler
  • org.jetbrains.kotlinx:kotlinx-html
  • org.apache.velocity:velocity-engine-core
  • gg.jte:jte
  • io.pebbletemplates:pebble
  • io.swagger.parser.v3:swagger-parser
  • metrics-core
  • metrics-jvm
  • tracing-subscriber

In common

spring-projects

spring-boot

Spring Boot helps you to create Spring-powered, production-grade applications and services with absolute minimum fuss.

Java81.8kRead on November 9, 2026, at commit bafb112What is spring-boot built with?

Only in spring-boot

  • JAX-RS
  • org.springframework.boot:spring-boot-starter-web
  • H2 Database
  • lettuce-core
  • Liquibase
  • MongoDB
  • org.apache.artemis:artemis-jakarta-client
  • org.springframework:spring-messaging
  • r2dbc-postgresql
  • spring-amqp-client
  • spring-data-ldap
  • spring-jms
  • spring-kafka
  • spring-r2dbc
  • spring-rabbit
  • spring-rabbitmq-client
  • io.r2dbc:r2dbc-spi
  • jakarta.jms:jakarta.jms-api
  • Neo4j
  • com.zaxxer:HikariCP
  • com.hazelcast:hazelcast
  • org.apache.activemq:activemq-client
  • Couchbase
  • Flyway
  • org.springframework.pulsar:spring-pulsar
  • org.springframework.ldap:spring-ldap-core
  • io.r2dbc:r2dbc-pool
  • org.apache.qpid:protonj2-client
  • grpc-services
  • jersey-container-servlet
  • jersey-media-json-jackson
  • jersey-spring6
  • jetty-ee11-websocket-jetty-server
  • org.apache.tomcat.embed:tomcat-embed-websocket
  • org.jetbrains.kotlin:kotlin-stdlib-jdk8
  • servlet-api
  • Spring Boot
  • spring-data-rest-webmvc
  • spring-graphql
  • tomcat-embed-el
  • Spring
  • org.springframework.grpc:spring-grpc-core
  • org.glassfish.jersey.core:jersey-server
  • org.eclipse.jetty.ee11:jetty-ee11-webapp
  • org.springframework.ws:spring-ws-core
  • org.springframework.integration:spring-integration-core
  • org.eclipse.jetty.ee11.websocket:jetty-ee11-websocket-jakarta-server
  • org.eclipse.jetty.compression:jetty-compression-gzip
  • org.eclipse.jetty.compression:jetty-compression-server
  • org.springframework.hateoas:spring-hateoas
  • org.springframework.data:spring-data-commons
  • spring-data-cassandra
  • spring-data-couchbase
  • spring-data-elasticsearch
  • spring-data-jpa
  • spring-data-mongodb
  • spring-data-neo4j
  • spring-data-r2dbc
  • org.jooq:jooq
  • jakarta.persistence:jakarta.persistence-api
  • org.hibernate.orm:hibernate-core
  • org.springframework.security:spring-security-crypto
  • spring-security-oauth2-authorization-server
  • spring-security-oauth2-client
  • spring-security-saml2-service-provider
  • spring-session-data-redis
  • spring-session-jdbc
  • org.springframework.session:spring-session-core
  • angus-mail
  • groovy-templates
  • com.samskivert:jmustache
  • jakarta.mail:jakarta.mail-api
  • com.sendgrid:sendgrid-java
  • org.glassfish.jersey.ext:jersey-bean-validation
  • Hibernate
  • jul-to-slf4j
  • micrometer-jakarta9
  • micrometer-tracing-bridge-brave
  • micrometer-tracing-bridge-otel
  • org.apache.logging.log4j:log4j-slf4j2-impl
  • zipkin-reporter-brave
  • io.micrometer:micrometer-observation
  • org.apache.logging.log4j:log4j-core
  • io.micrometer:micrometer-tracing
  • OpenTelemetry
  • io.opentelemetry:opentelemetry-sdk
  • org.apache.logging.log4j:log4j-api
  • io.opentelemetry:opentelemetry-exporter-otlp
  • io.micrometer:micrometer-registry-otlp
  • io.opentelemetry.instrumentation:opentelemetry-logback-appender-1.0
  • org.apache.logging.log4j:log4j-jul

Side by side

SizeLines written by people and agents, without generated ones; code files, without tests.
ktor301,366 lines written1,642 code files
spring-boot759,628 lines written4,267 code files
Who writes itA commit counts as AI's when it carries its signature: a Co-Authored-By line, its author name or the merge of its branch.
ktor0.7% of its commits signed by AIWith Claude Code, CodeRabbit, Cursor, Codex, and GitHub Copilot
spring-boot0% of its commits signed by AIWith Claude Code
ActivityFrom GitHub and its history, on the day SeeRepo read it.
ktorLast push November 7, 20266,943 commits14,562 stars
spring-bootLast push November 9, 202642,460 commits81,789 stars
TestsThe files that test the code, and the share of code files a test imports.
ktor780 test files53.5% of its code files have a test that imports them
spring-boot4,558 test files55.8% of its code files have a test that imports them

Frequently asked questions

Which is bigger, ktor or spring-boot?
spring-boot, with 759,628 lines written; ktor has 301,366.

The proof: spring-projects/spring-boot's code at commit bafb112

Which has more GitHub stars, ktor or spring-boot?
spring-boot, with 81,789 stars; ktor has 14,562.

The proof: spring-projects/spring-boot on GitHub

Which has more tests, ktor or spring-boot?
spring-boot, with 4,558 test files; ktor has 780.

The proof: spring-projects/spring-boot's code at commit bafb112

Which was updated more recently, ktor or spring-boot?
spring-boot: its last push was on November 9, 2026, and ktor's on November 7, 2026.

The proof: spring-projects/spring-boot's commits on GitHub

Which has more commits signed by AI, ktor or spring-boot?
ktor: an AI signed 0.7% of its commits, with Claude Code, CodeRabbit, Cursor, Codex, and GitHub Copilot.

The proof: the commits each tool signed in ktorio/ktor

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