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kotlinlang.org

JetBrains s.r.o. develops Kotlin and supports a global open-source developer community.

JetBrains s.r.o. is a software company that develops and maintains Kotlin, an open-source, cross-platform programming language. The organization supports a global developer community and provides documentation and tooling for the Kotlin project, with backing from the Kotlin Foundation and JetBrains.

Mission statement

To empower developers worldwide by developing and sustaining a multiplatform programming language and related tooling while fostering an open, collaborative software ecosystem.

Products & Services

Kotlin Product

Kotlin enhances productivity by offering concise code and seamless Java interoperability.

kotlinlang.org
  • Open-source, cross-platform language — Facilitates Various Platforms
  • Support from Kotlin Foundation and JetBrains — Ensures Continuous Improvement
  • Interoperability with Java — Utilizes Existing Java Libraries
  • Less Code for Greater Readability — Improves Developer Productivity
  • Kotlin Multiplatform Support — Enables Cross-Platform Development
  • Strong Community and Ecosystem — Access to Community Resources

Kotlin Multiplatform Platform

Share logic across platforms while maintaining native feel.

kotlinlang.org/multiplatform
  • Cross-platform code sharing — Enables Code Reuse Across Platforms
  • Shared core interfacing with native code — Unified Logic and Platform Integration
  • Compose Multiplatform Support — Create Unified UIs Across Platforms
  • Gradual adoption with mixed shared and native code — Gradually Incorporate Shared Logic
  • Strong Community and Ecosystem — Leverage Community Contributions

Compose Multiplatform Platform

Develop beautiful shared UIs that feel native across Android, iOS, desktop, and web platforms.

kotlinlang.org/api/compose-multiplatform/material3
  • Declarative UI Framework Across Platforms — Enables Native-Quality UIs
  • Production-Ready iOS Support — Deploy on iOS Efficiently
  • Hot Reload — Instant UI Tweaks
  • AI-Powered Code Generation — Speed Up UI Coding
  • Gradual Adoption — Start Small or Go Big

Kotlin Standard Library Product

Essential tools for effective Kotlin development, simplifying coding tasks and enhancing productivity.

kotlinlang.org/api/core/kotlin-stdlib/index.html
  • Core Functions and Types — Facilitates Common Programming Patterns
  • Higher-order and Extension Functions — Enables Flexible Coding Patterns
  • String and IO Utilities — Simplifies IO and File Handling
  • Multiplatform Support — Supports Cross-Platform Development

Kotlin Test Product

Facilitates framework-agnostic testing with Kotlin through robust annotations and assertion functions.

kotlinlang.org/api/core/kotlin-test/index.html
  • Asserter Abstraction — Abstracts Testing Logic
  • Test Annotations and Assertions — Enables Structured Testing
  • Multi-runtime Modules — Supports Multiple Runtimes

Kotlin Gradle Plugins Product

Automate Kotlin builds and streamline development processes with Kotlin Gradle plugins.

kotlinlang.org/api/kotlin-gradle-plugin
  • Build Automation — Automate Build Processes
  • Simplified Multiplatform Builds — Simplify Multiplatform Development
  • IDE Integration — Enhance IDE Workflow
  • CI System Compatibility — Improve CI Integration

Ktor Platform

Create high-performance web applications with Kotlin.

api.ktor.io
  • Asynchronous Programming — Utilize Coroutines
  • Flexible Routing — Configure Routes Effortlessly
  • Detailed Documentation — Access Comprehensive Guides
  • Integrations with Existing Frameworks — Enhance Existing Applications

kotlinx-datetime Product

Provides multiplatform date and time handling for Kotlin.

kotlinlang.org/api/kotlinx-datetime
  • Date and Time Support — Handles Dates and Times Effectively
  • Timezone Support — Performs Timezone Calculations

Kotlinx I/O Product

Facilitates efficient I/O operations across multiplatform environments.

kotlinlang.org/api/kotlinx-io
  • Core Multiplatform I/O Primitives — Streamlined I/O Handling
  • ByteString Module — Utilize Efficient Byte Handling
  • Okio Integration — Seamless Interoperability

kotlinx-coroutines Product

Enable efficient asynchronous programming with Kotlin coroutines.

kotlinlang.org/api/kotlinx-coroutines
  • Core Coroutine Primitives — Facilitates Coroutine Management
  • Asynchronous Streams — Supports Flow API
  • Dispatcher Implementations — Optimizes Execution Contexts
  • Synchronization Primitives — Enables Safe Concurrent Access
  • Testing Utilities — Facilitates Coroutine Testing

kotlinx-serialization Product

Enables seamless serialization of Kotlin objects into various formats.

kotlinlang.org/api/kotlinx-serialization
  • Core serialization API — Facilitates Kotlin Object Serialization
  • JSON format implementation — Transforms Kotlin Objects To JSON
  • CBOR Format Support — Efficiently Encodes Data
  • Support for Protocol Buffers — Integrates With Protocol Buffers

kotlinx-collections.immutable Product

Offers immutable and persistent collection types for Kotlin Multiplatform.

kotlinlang.org/api/kotlinx.collections.immutable
  • Immutable Collections — Ensure Data Integrity
  • Multiplatform Support — Facilitate Cross-Platform Development

Market Segments

Billion USD 0 50 100 150 200 250 300 Mobile and web … Declarative cro… Programming lan… Server-side web… Test automation… Market Size (Billion USD)
0% 2% 4% 6% 8% 10% 12% 14% 16% 18% 20% CAGR Growth Potential

Mobile and web application development

Development of scalable cross-platform web and mobile applications, including full-stack engineering, agile delivery, and ongoing support for performance and maintenance.

Market size: $279.2B CAGR: 8.9%
Estimate based on combining published 2026 market values for mobile apps (FMI) and web development (Business Research Insights) to represent cross‑platform mobile+web application development. Sum of FMI mobile application market (USD 196.8B in 2026) and BRI web development market (USD 82.4B in 2026) yields ~USD 279.2B (2026). Weighted average of the two reported CAGRs (9.3% and 8.03%) gives a combined CAGR ≈ 8.9%. Note: an MRFR report lists a broader "application development" figure (USD 162.33B in 2024, CAGR 38.2%) which is an outlier versus the sector-specific FMI/BRI forecasts and was not used to raise the combined CAGR.
IN GL 20 3 references

Declarative cross-platform UI

Frameworks and libraries for building shared declarative user interfaces with hot reload and production-ready iOS support.

Market size: $125M CAGR: 16.8%
Primary source is a Persistence Market Research report that defines the global cross-platform app development framework market (includes React Native, Flutter, Xamarin) at US$124.5M in 2025 and projects a 16.8% CAGR (2025–2032). Because declarative cross‑platform UI frameworks (Flutter, React Native) are a core subset of that market, the segment is estimated at ~US$0.125B with similar growth potential. For context, a broader UI design market report (Business Research Insights) shows a larger adjacent market (USD 3.21B in 2026, ~15% CAGR), indicating stronger downstream demand for UI tooling and services.
GL GL 2 references

Programming language and standard library

A modern, interoperable language and its core libraries providing runtime primitives, collection utilities and cross-platform APIs.

Market size: $2.5B CAGR: 6%
No explicit global TAM for a "programming language and standard library" product was present in the search results. I used the provided search results (BLS employment growth cited on the Coursera page and TIOBE popularity metrics) plus domain knowledge about monetization pathways (enterprise language support, commercial runtimes, paid libraries, tooling, training, and consulting). The BLS 16% developer workforce growth (2024–2034) implies modest annual workforce-driven demand (≈1.5% p.a.), while observed shifts in language popularity (TIOBE ratings) and trends (cloud, AI, enterprise licensing) support faster commercial spending on language ecosystems. Combining these factors yields a conservative current market-size estimate of about $2.5B (commercial language/runtime/support/library ecosystem) with a mid-range growth potential of ~6% CAGR driven by increased cloud/AI investments and enterprise support/consulting spend.
SO PY 2 references

Server-side web frameworks

Asynchronous, coroutine-based web application frameworks and libraries for building scalable non-blocking backends.

Market size: $260M CAGR: 12%
Used web development and frameworks market reports from the search results as anchors. Market Research Future estimates the overall web development market at $57.31B (2024); frontend/frameworks-focused reports value frontend frameworks at $10.6B (2025) with higher CAGR. Assumptions: backend/server-side represents a subset of overall web development (assume ~25–30%); frameworks/tools within backend represent a small portion (~8–12%); Kotlin async frameworks (Ktor, Micronaut Kotlin, coroutines-optimized runtimes) are a niche slice of that frameworks/tools market (~10–20%). Applying these conservatively yields an estimated current market size of about $0.26B for Kotlin-optimized async server-side frameworks and runtimes. Growth potential is expected to be materially above broad web development growth (5.2%) and similar to framework-specific growth (≈13.6%), so a mid-high CAGR of ~12% reflects rising Kotlin adoption, microservices, async/non-blocking architectures, and cloud-native demand.
20 BA 2 references

Test automation and continuous testing

Capabilities that automate testing across CI/CD pipelines, support multiple frameworks, and provide dashboards and analytics for test coverage and release quality.

Market size: $10.4B CAGR: 17.1%
Primary estimate based on ResearchNester’s continuous testing market figures (2025 size $10.4B, CAGR 17.1% 2026–2035). Broader automation-testing reports (MarketResearchFuture) show larger TAM (~$33.2B in 2024, 15.1% CAGR), while other vendors present lower alternative estimates (Coherent ~US$3.58B, 4.05% CAGR; LinkedIn summary cites 9.3% CAGR). The estimate uses ResearchNester as the closest match to the "continuous testing / test automation in CI/CD" segment while noting variability across sources.

Related Organizations

Common Questions

What does JetBrains s.r.o. do?
JetBrains s.r.o. is a software company that develops and maintains Kotlin, an open-source, cross-platform programming language. The organization supports a global developer community and provides documentation and tooling for the Kotlin project, with backing from the Kotlin Foundation and JetBrains.
What is JetBrains s.r.o.'s role in the Mobile and web application development market?
Development of scalable cross-platform web and mobile applications, including full-stack engineering, agile delivery, and ongoing support for performance and maintenance.
What is JetBrains s.r.o.'s role in the Declarative cross-platform UI market?
Frameworks and libraries for building shared declarative user interfaces with hot reload and production-ready iOS support.
How was the Mobile and web application development market size estimate for JetBrains s.r.o. calculated?
Estimate based on combining published 2026 market values for mobile apps (FMI) and web development (Business Research Insights) to represent cross‑platform mobile+web application development. Sum of FMI mobile application market (USD 196.8B in 2026) and BRI web development market (USD 82.4B in 2026) yields ~USD 279.2B (2026). Weighted average of the two reported CAGRs (9.3% and 8.03%) gives a combined CAGR ≈ 8.9%. Note: an MRFR report lists a broader "application development" figure (USD 162.33B in 2024, CAGR 38.2%) which is an outlier versus the sector-specific FMI/BRI forecasts and was not used to raise the combined CAGR.
How was the Declarative cross-platform UI market size estimate for JetBrains s.r.o. calculated?
Primary source is a Persistence Market Research report that defines the global cross-platform app development framework market (includes React Native, Flutter, Xamarin) at US$124.5M in 2025 and projects a 16.8% CAGR (2025–2032). Because declarative cross‑platform UI frameworks (Flutter, React Native) are a core subset of that market, the segment is estimated at ~US$0.125B with similar growth potential. For context, a broader UI design market report (Business Research Insights) shows a larger adjacent market (USD 3.21B in 2026, ~15% CAGR), indicating stronger downstream demand for UI tooling and services.
JetBrains s.r.o. — company overview