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Mobile Development · head to head

Kotlin Multiplatform vs Mautic

Kotlin Multiplatform logo

Kotlin Multiplatform

Mobile Development

JetBrains-funded technology for sharing Kotlin business logic across iOS, Android, web, desktop and server

From
Free
Rated
-
Full reviewWebsite
Mautic logo

Mautic

Marketing

The main open source marketing automation platform, self-hosted and GPL licensed

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Kotlin Multiplatform it shares logic, not UI, by default, so a team expecting a Flutter-style single UI codebase has to also adopt Compose Multiplatform, which is newer and less proven on iOS than on Android.; Mautic mautic depends on reliably scheduled cron jobs to process segments and send campaigns, and a misconfigured or silently failing schedule stops sends without an obvious error, which is the most common way Mautic deployments fail in production.
  • They diverge on capability: Kotlin Multiplatform covers Shared Kotlin logic, Mautic covers Visual campaign builder.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Kotlin Multiplatform and Mautic actually diverge.

Attributes where Kotlin Multiplatform and Mautic differ
AttributeKotlin MultiplatformMautic
PlatformsiOS, Android, Windows, macOS, Linux, WebWeb, Linux, Self-hosted, Docker
CategoryMobile DevelopmentMarketing

Identical on both: starting price (Free), pricing model (Open source, no licence fee), free tier (Yes), user rating (Not yet rated).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Kotlin Multiplatform

  • Shared Kotlin logic
  • Native UI retained
  • Compose Multiplatform (optional)
  • IDE tooling
  • Gradle-based builds
  • Incremental adoption

Only in Mautic

  • Visual campaign builder
  • Contact management and segmentation
  • Landing pages and forms
  • Lead scoring
  • Dynamic web content
  • Email builder and A/B testing
  • Self-hosted data control
  • No feature gating

What people use each for

The jobs each tool is most often brought in to do.

Kotlin Multiplatform

  • A company with existing separate native iOS and Android codebases wanting to stop duplicating business logic and networking codenot Mautic
  • A team that wants shared logic but is not willing to compromise on fully native UI per platformnot Mautic
  • An organisation already using Kotlin on the backend that wants to reuse the same models and validation on mobile clientsnot Mautic
  • A team evaluating Compose Multiplatform for UI sharing but wanting the option to fall back to native UI per screennot Mautic

Mautic

  • A marketing agency running automation for many clients that cannot pass on per-contact SaaS pricing at scalenot Kotlin Multiplatform
  • A European university or public body whose data protection position requires contact data to stay on infrastructure it controlsnot Kotlin Multiplatform
  • A company with a list of several hundred thousand contacts where SaaS per-contact pricing has become the largest line in the marketing budgetnot Kotlin Multiplatform
  • A team that needs to modify the automation logic itself, not just configure it, and wants source access to do sonot Kotlin Multiplatform

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Kotlin Multiplatform

  • It shares logic, not UI, by default, so a team expecting a Flutter-style single UI codebase has to also adopt Compose Multiplatform, which is newer and less proven on iOS than on Android.
  • iOS interop relies on Kotlin/Native compiling to a framework consumed from Swift, and debugging across that boundary is more friction than debugging pure Swift or pure Kotlin.
  • Because logic-sharing is the whole premise, teams still need genuine iOS and Android UI expertise on staff; it does not reduce the native skills bar the way a full cross-platform UI framework aims to.
  • Build times and tooling maturity for multiplatform Gradle projects lag behind single-platform Kotlin or Swift projects, and multiplatform-specific build errors are less well documented.
  • JetBrains funds it as part of the broader Kotlin investment, so its roadmap priority competes internally with IntelliJ, Android Studio and other JetBrains commitments rather than having dedicated headcount the way Flutter has at Google.

Mautic

  • Mautic depends on reliably scheduled cron jobs to process segments and send campaigns, and a misconfigured or silently failing schedule stops sends without an obvious error, which is the most common way Mautic deployments fail in production.
  • Email sending is not included: you must arrange, pay for and warm up your own sending infrastructure through Amazon SES, SendGrid or similar, and deliverability problems become entirely your problem with no vendor to escalate to.
  • Acquia owns the commercial descendant, Campaign Studio, and is the largest contributor, so the loudest commercial interest in the ecosystem benefits from a hosted product rather than from the self-hosted one being easy.
  • Upgrades between major versions have historically been disruptive, requiring database migrations and plugin compatibility checks, so a neglected instance can become expensive to bring current.
  • The interface and the reporting are noticeably behind commercial platforms, so marketing teams that came from HubSpot or ActiveCampaign will find everyday tasks slower and will need training.

Pricing, plan by plan

Kotlin Multiplatform

Free
  • Kotlin MultiplatformFree
    • Apache 2.0 licensed, unlimited apps
    • IDE tooling in the free Android Studio and free-tier IntelliJ IDEA Community
    • No paid Kotlin Multiplatform edition exists

Mautic

Free
  • Self-hosted communityFree
    • GPL licensed, no licence fee and no contact limits
    • All features included, no paid edition
    • You provide hosting, database, cron scheduling and email sending
  • Managed Mautic hosting$undefined/month
    • Third-party managed hosting listed by the project
    • Updates, backups and cron scheduling handled for you
    • Pricing varies by provider and is not set by the project

Which should you pick?

Choose Kotlin Multiplatform if

  • You need shared kotlin logic.
  • You want to start without paying.
  • You work on iOS, Android, Windows, macOS, Linux, Web.
  • You also want native ui retained.
Kotlin Multiplatform review

Choose Mautic if

  • You need visual campaign builder.
  • You want to start without paying.
  • You work on Web, Linux, Self-hosted, Docker.
  • You also want contact management and segmentation.
Mautic review

Questions people ask

Is Kotlin Multiplatform or Mautic better?
Neither clearly leads. Kotlin Multiplatform starts at Free and Mautic at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Kotlin Multiplatform or Mautic?
Kotlin Multiplatform starts at Free and Mautic at Free.
Does Kotlin Multiplatform or Mautic run on more platforms?
Kotlin Multiplatform runs on iOS, Android, Windows, macOS, Linux, Web. Mautic runs on Web, Linux, Self-hosted, Docker.
Can I use Kotlin Multiplatform for free?
Both have a free tier, so you can try either at no cost before committing.
What is Kotlin Multiplatform best used for?
Kotlin Multiplatform is most often used for a company with existing separate native ios and android codebases wanting to stop duplicating business logic and networking code, a team that wants shared logic but is not willing to compromise on fully native ui per platform, an organisation already using kotlin on the backend that wants to reuse the same models and validation on mobile clients, a team evaluating compose multiplatform for ui sharing but wanting the option to fall back to native ui per screen. Of those, a company with existing separate native ios and android codebases wanting to stop duplicating business logic and networking code and a team that wants shared logic but is not willing to compromise on fully native ui per platform are not what Mautic is typically brought in for.
What can Kotlin Multiplatform do that Mautic cannot?
Kotlin Multiplatform covers Shared Kotlin logic, Native UI retained, Compose Multiplatform (optional), IDE tooling. Mautic covers Visual campaign builder, Contact management and segmentation, Landing pages and forms, Lead scoring.

Answered from the vendors’ own pages

Kotlin Multiplatform: Does Kotlin Multiplatform replace my native UI code?

Not by default. It shares business logic and data layers; UI stays native per platform unless you separately adopt Compose Multiplatform.

Mautic: Is Mautic free?

Yes, GPL licensed with no licence fee and no contact limits. You pay for hosting, email sending and the staff time to maintain it.

Kotlin Multiplatform: Is there a paid version?

No. It is Apache 2.0 licensed and free, funded by JetBrains as part of the Kotlin project.

Mautic: Does Acquia own Mautic?

Acquia acquired the founding commercial entity in 2019 and sells Campaign Studio built on it, but the Mautic trademark sits with the Open Source Collective and the project is community governed.

Kotlin Multiplatform: Do I need Compose Multiplatform to use it?

No, they are separate. You can share only logic and keep fully native UI on each platform indefinitely.

Mautic: What breaks most often?

Cron scheduling. If segment rebuilding and campaign triggers are not running on schedule, campaigns quietly stop sending with no alert.

Mautic: Can it handle large contact lists?

Yes, but performance at several hundred thousand contacts depends on database tuning and queue configuration, which is work you must do yourself.

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