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Comparison

Swift vs Kotlin

Swift lands on Depends, and Kotlin lands on Worth it.

Swift

Depends

Confidence: Medium

Adopt Swift if you build iOS/macOS apps or want a fast, safe general-purpose language . it is free and Apple-funded.

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Kotlin

Worth it

Confidence: Medium

Adopt Kotlin if you build Android or JVM software: it is free, modern, and proven at scale (Baidu, Mirego).

Read the full report

Swift versus Kotlin
Compare	Swift	Kotlin
Verdict	Depends	Worth it
Best for	iOS and macOS app teams	Android app developers
Who it's not for	Non-developers . this is a programming language, not an app	Total beginners choosing a first programming language
Privacy	Active, transparent security process; no language-core issues found, but ecosystem packages have had patched CVEs.^⁵	Official security page and a May 2026 security support policy for the standard library; a few historical CVEs are documented and fixed.
Support quality	Community forums only; no paid SLA	Active Slack and forums; no paid support found
Public sentiment	Developers praise Swift's speed, safety, and low-level capability; recurring complaints target documentation depth and the split between and Apple's docs.^³	Reddit and Medium developers are largely enthusiastic, especially those coming from Java, while beginners report a steep learning curve.¹⁴
Biggest gotcha	No paid support tier . help comes via Swift forums and community	Historical CVEs exist (CVE-2020-29582, CVE-2022-24329); keep compiler and plugins updated

Pick Swift when

iOS and macOS app teams
Performance-critical, low-level work
Teams migrating off Java or ObjC
Server-side teams wanting single-language stacks

When Swift is not a fit

Non-developers . this is a programming language, not an app
Teams wanting a no-code tool or simple spreadsheet replacement
Buyers needing vendor SLAs or paid support contracts
Shops with no Apple-platform or server-side Swift ambitions

Pick Kotlin when

Android app developers
Java/JVM backend teams
Cross-platform mobile via Kotlin Multiplatform
Java shops tired of verbosity

When Kotlin is not a fit

Total beginners choosing a first programming language
iOS-only teams; Swift is the native choice
Non-technical buyers; this is a language, not a managed product
Quick one-off scripts where Python is faster to write

Sources

Swift.org homepageswift.org
official
About Swiftswift.org
official
Swift on G2g2.com
review
Swift.org security pageswift.org
security
swift-nio-http2 HTTP/2 DoS advisoryforums.swift.org
security
Reddit: swift.org vs Apple developer docsreddit.com
review
Apple funds Swift development (forums)forums.swift.org
news
State of Swift documentation (forums)forums.swift.org
review
Swift at Apple: Password Monitoring migrationswift.org
official
Cultured Code Swift vs Python case studytechzine.eu
news
Kotlin Programming Language (official)kotlinlang.org
official
JetBrains/kotlin on GitHubgithub.com
official
Rant: Kotlin is a nightmare for people learning programmingreddit.com
review
I think i'm falling in love with Kotlin (r/java)reddit.com
review
Switching from Java to Kotlin . a first reviewmedium.com
review
My Thoughts on Kotlin: Perspectives after 4 yearstylerrussell.dev
review