Open-Source JVM Build Tools Compared: Gradle vs Maven vs SBT vs Bazel

Introduction

The JVM ecosystem has an unusually rich landscape of build tools, each embodying fundamentally different philosophies about how projects should be structured, dependencies resolved, and builds executed. Whether you’re managing a single microservice or a multi-language monorepo with hundreds of modules, your choice of build tool has cascading effects on developer productivity, CI performance, and onboarding complexity.

This guide compares four major open-source JVM build tools: Gradle, Maven, SBT, and Bazel — analyzing their design paradigms, configuration models, and ideal use cases.

Build Tool Overview

Feature	Gradle	Maven	SBT	Bazel
GitHub Stars	18,718	5,163	4,932	25,530
Configuration	Groovy/Kotlin DSL	XML (pom.xml)	Scala DSL	Starlark (Python-like)
Build Model	Directed Acyclic Graph	Linear lifecycle	Task graph	Action graph
Incremental Builds	Yes (smart)	Limited	Yes (Zinc)	Yes (hermetic)
Remote Caching	Enterprise only	Extensions	No	Built-in
Parallel Execution	Yes (configurable)	Modules only	Subprojects	Fully parallel
Plugin Ecosystem	1,000+ plugins	3,000+ plugins	500+ plugins	200+ rules
Multi-Language	JVM + native	JVM primarily	Scala/JVM	Polyglot (15+ langs)
IDE Integration	Excellent (IntelliJ)	Excellent (all IDEs)	Good (IntelliJ)	Good (CLion)
Learning Curve	Moderate	Low	Steep	High
Last Updated	June 2026	June 2026	June 2026	June 2026

Gradle: Flexible DAG-Based Builds

Gradle is the most widely adopted build tool for new JVM projects, powering everything from Android apps to Spring Boot microservices. Its key innovation is treating the build as a directed acyclic graph (DAG) of tasks, enabling intelligent incremental builds and parallel execution.

Gradle Build Configuration (Kotlin DSL)

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
// build.gradle.kts
plugins {
    id("org.springframework.boot") version "3.3.0"
    id("io.spring.dependency-management") version "1.1.5"
    kotlin("jvm") version "1.9.24"
}

group = "com.example"
version = "1.0.0"

repositories {
    mavenCentral()
}

dependencies {
    implementation("org.springframework.boot:spring-boot-starter-web")
    implementation("org.jetbrains.kotlin:kotlin-reflect")
    testImplementation("org.springframework.boot:spring-boot-starter-test")
    testImplementation("org.junit.jupiter:junit-jupiter")
}

tasks.withType<Test> {
    useJUnitPlatform()
    maxParallelForks = Runtime.getRuntime().availableProcessors()
}

// Custom task example
tasks.register<Copy>("copyConfig") {
    from("src/main/resources")
    into("build/config")
    include("*.yml")
}

Multi-Module Setup

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
// settings.gradle.kts
rootProject.name = "my-platform"
include("core", "api", "worker", "shared-test")

// build.gradle.kts (root)
subprojects {
    apply(plugin = "java-library")
    group = "com.example"
    version = "1.0.0"
    
    repositories { mavenCentral() }
    
    dependencies {
        "testImplementation"("org.junit.jupiter:junit-jupiter:5.10.2")
    }
}

When to Choose Gradle

You want modern, readable build configuration (Kotlin DSL)
Your project has complex build logic with conditional task execution
You need excellent Android or Spring Boot integration
Your team values build performance (incremental compilation, build cache)

Maven: The Convention Champion

Maven remains the most battle-tested build tool in the JVM ecosystem, with 5,163 stars on GitHub and an enormous plugin ecosystem of over 3,000 extensions. Its “convention over configuration” philosophy means a well-structured Maven project needs very little boilerplate — but deviating from conventions requires verbose XML.

Maven POM Configuration

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
         http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.example</groupId>
    <artifactId>my-service</artifactId>
    <version>1.0.0</version>
    <packaging>jar</packaging>

    <properties>
        <java.version>21</java.version>
        <spring-boot.version>3.3.0</spring-boot.version>
    </properties>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>3.3.0</version>
    </parent>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>org.postgresql</groupId>
            <artifactId>postgresql</artifactId>
            <scope>runtime</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-surefire-plugin</artifactId>
                <configuration>
                    <parallel>methods</parallel>
                    <threadCount>4</threadCount>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

Multi-Module Maven

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
<!-- Parent POM -->
<project>
    <groupId>com.example</groupId>
    <artifactId>my-platform-parent</artifactId>
    <version>1.0.0</version>
    <packaging>pom</packaging>
    
    <modules>
        <module>core</module>
        <module>api</module>
        <module>worker</module>
    </modules>
    
    <dependencyManagement>
        <!-- Centralized version management -->
    </dependencyManagement>
</project>

When to Choose Maven

Your organization has existing Maven expertise and infrastructure
You want maximum IDE support with zero configuration
Your project follows standard conventions (src/main/java, etc.)
You need the largest available plugin ecosystem (3,000+ plugins)
Stability and backward compatibility are paramount

SBT: The Scala-Native Power Tool

SBT (Scala Build Tool) is the de facto standard for Scala projects, with 4,932 stars. It uses Scala itself as the build definition language, which means you get full programmatic power in your build configuration — but at the cost of complexity that can overwhelm newcomers.

SBT Build Definition

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
// build.sbt
ThisBuild / organization := "com.example"
ThisBuild / scalaVersion := "3.3.1"
ThisBuild / version      := "1.0.0"

lazy val root = (project in file("."))
  .aggregate(core, api)
  .settings(
    name := "my-platform"
  )

lazy val core = (project in file("core"))
  .settings(
    name := "core",
    libraryDependencies ++= Seq(
      "org.typelevel"     %% "cats-effect"       % "3.5.2",
      "co.fs2"            %% "fs2-core"           % "3.9.3",
      "org.scalatest"     %% "scalatest"          % "3.2.18" % Test,
      "org.typelevel"     %% "munit-cats-effect"  % "2.0.0"  % Test
    )
  )

lazy val api = (project in file("api"))
  .dependsOn(core)
  .settings(
    name := "api",
    libraryDependencies ++= Seq(
      "org.http4s"        %% "http4s-ember-server" % "0.23.25",
      "org.http4s"        %% "http4s-dsl"          % "0.23.25",
      "org.http4s"        %% "http4s-circe"        % "0.23.25",
      "io.circe"          %% "circe-generic"       % "0.14.7"
    )
  )

SBT Custom Tasks

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
// project/CustomTasks.scala
import sbt._
import Keys._

object CustomTasks {
  val generateDocs = taskKey[Unit]("Generate API documentation")
  
  val customSettings = Seq(
    generateDocs := {
      val log = streams.value.log
      val src = (Compile / sourceDirectory).value
      val out = target.value / "docs"
      log.info(s"Generating docs from $src to $out")
      // Custom doc generation logic
    }
  )
}

SBT’s incremental compiler (Zinc) provides excellent compile-times for Scala projects. However, SBT’s build definition model — where .sbt files and project/ Scala files combine with auto-imported plugins — can create confusing implicit state that frustrates debugging.

When to Choose SBT

Your project is primarily Scala — SBT understands Scala dependencies better than any alternative
You need cross-compilation across multiple Scala versions
Your team is comfortable with Scala and functional programming concepts
You’re using the Typelevel or ZIO ecosystem heavily

Bazel: The Polyglot Monorepo Engine

Bazel is Google’s open-source build system designed for massive monorepos with multiple languages. With 25,530 stars, it has a steep learning curve but provides unparalleled build correctness, reproducibility, and remote caching capabilities.

Bazel Build Configuration

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
# BUILD.bazel
load("@rules_java//java:defs.bzl", "java_binary", "java_library")
load("@rules_jvm_external//:defs.bzl", "artifact")

java_library(
    name = "core",
    srcs = glob(["src/main/java/com/example/core/**/*.java"]),
    deps = [
        artifact("com.google.guava:guava:33.1.0-jre"),
        artifact("org.slf4j:slf4j-api:2.0.12"),
    ],
)

java_binary(
    name = "api",
    srcs = glob(["src/main/java/com/example/api/**/*.java"]),
    main_class = "com.example.api.ApiServer",
    deps = [
        ":core",
        artifact("org.springframework.boot:spring-boot-starter-web:3.3.0"),
        artifact("org.postgresql:postgresql:42.7.3"),
    ],
)

# Test target
java_test(
    name = "core_test",
    srcs = glob(["src/test/java/com/example/core/**/*.java"]),
    test_class = "com.example.core.AllTests",
    deps = [
        ":core",
        artifact("org.junit.jupiter:junit-jupiter:5.10.2"),
    ],
)

WORKSPACE Configuration

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
# WORKSPACE.bazel
load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")

# Rules JVM External for Maven dependencies
RULES_JVM_EXTERNAL_TAG = "6.0"
http_archive(
    name = "rules_jvm_external",
    sha256 = "...",
    strip_prefix = "rules_jvm_external-%s" % RULES_JVM_EXTERNAL_TAG,
    url = "https://github.com/bazelbuild/rules_jvm_external/releases/download/%s/rules_jvm_external-%s.tar.gz" % (RULES_JVM_EXTERNAL_TAG, RULES_JVM_EXTERNAL_TAG),
)

load("@rules_jvm_external//:repositories.bzl", "rules_jvm_external_deps")
rules_jvm_external_deps()

load("@rules_jvm_external//:setup.bzl", "rules_jvm_external_setup")
rules_jvm_external_setup()

load("@rules_jvm_external//:defs.bzl", "maven_install")
maven_install(
    artifacts = [
        "org.springframework.boot:spring-boot-starter-web:3.3.0",
        "com.google.guava:guava:33.1.0-jre",
        "org.postgresql:postgresql:42.7.3",
        "org.junit.jupiter:junit-jupiter:5.10.2",
    ],
    repositories = [
        "https://repo1.maven.org/maven2",
    ],
)

When to Choose Bazel

You manage a polyglot monorepo (Java, Go, Python, C++, TypeScript together)
Build correctness and reproducibility are critical (regulated industries)
You need remote caching and distributed build execution at scale
Your team is large enough (20+ engineers) to justify the setup overhead
You’re comfortable investing in build engineering as a dedicated function

Choosing the Right Build Tool

Your choice ultimately depends on three factors: project complexity, team size, and language mix.

For a single-language JVM project with standard structure, Maven remains the safest choice — it works everywhere, every IDE supports it perfectly, and there’s a plugin for everything. For teams that want modern ergonomics without sacrificing the JVM ecosystem, Gradle with Kotlin DSL offers the best balance of power and readability.

SBT is the uncontested choice for Scala-heavy projects, where its tight integration with the Scala compiler ecosystem pays dividends in incremental compilation speed and cross-build management. Bazel should only be considered when you have a genuine polyglot monorepo problem — its setup and maintenance cost is too high for single-language projects.

For self-hosted CI/CD pipelines, all four tools integrate well with Jenkins, GitHub Actions, and GitLab CI. Gradle and Bazel provide the best incremental and remote caching, which significantly reduces CI build times for large projects. For more on build infrastructure, see our monorepo build systems comparison. If you’re interested in build caching strategies, check our remote build cache guide.

FAQ

Can I migrate from Maven to Gradle incrementally?

Yes. Gradle can consume Maven POMs directly, and you can migrate module by module in a multi-module project. Start by creating a settings.gradle.kts that includes your existing Maven modules, then convert each module’s pom.xml to build.gradle.kts one at a time.

Why does Bazel have so few plugins compared to Maven?

Bazel’s design philosophy treats plugins (called “rules”) as versioned, hermetic dependencies rather than ad-hoc extensions. This means fewer but more reliable rules. Bazel’s trade-off is that creating new rules requires more upfront investment than writing a Maven plugin.

Is SBT usable for Java-only projects?

Technically yes, but it’s not recommended. SBT’s value proposition is its Scala integration and compiler bridge. For Java-only projects, you’ll find Maven or Gradle more ergonomic with better documentation and community support for Java-specific workflows.

How does Gradle’s configuration cache work?

Gradle’s configuration cache serializes the result of the configuration phase (resolving the task graph) so that subsequent builds skip this phase entirely. This can reduce build startup time by 30-80%, especially in CI environments. It’s stable since Gradle 8.1 and enabled by default in Gradle 9.x.

Which tool is best for Android development?

Gradle is the official and only fully supported build tool for Android. The Android Gradle Plugin (AGP) provides tight integration with Android SDK, resource processing, and APK/AAB packaging. Maven, SBT, and Bazel have community-maintained Android support but lack the official tooling depth.

Can I use Bazel with a team of 5 developers?

It’s possible but not recommended. Bazel’s onboarding cost (Starlark language, WORKSPACE management, rule selection) typically requires a dedicated build engineer for teams under 10-15 developers. For small teams, Gradle provides most of Bazel’s benefits (incremental builds, caching, parallel execution) with much lower setup cost.

💰 想测试你的市场判断力？我用 Polymarket 做预测市场交易——这是全球最大的预测市场平台，从大选结果到技术监管时间线，什么都可以押注。和赌博不同，这是真正的信息市场：你懂的信息越多，胜率越高。我靠预测技术相关事件的走向已经赚了不少。用我的邀请链接注册：Polymarket.com