An Aptabase alternative for when counts are not enough.

Aptabase is simple, open source and anonymous by design, with SDKs for many platforms. Union is for when you need to see sessions and people, crashes and releases, and what subscribers do.

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Union and Aptabase, side by side.

	Union	Aptabase
Free tier	100,000 events a month	20,000 events a month
First paid plan	Solo €9 / month for 1M events	$10 / month for 200,000 events
Open source	Partly: iOS SDK on GitHub	Yes: Server AGPL-3.0, SDKs MIT, self-hostable
Subscription revenue	Yes: RevenueCat or App Store Server Notifications	Not in RevenueCat’s integration list
Platforms	Partly: iOS, plus server-side events	Yes: Swift, Kotlin, Flutter, React Native, web and more

Aptabase facts read on their own website on Oct 23, 2026. Rows we could not check there are left out rather than guessed.

Why teams pick Union over Aptabase.

Sessions and people
What a session looked like and a person’s history across devices, unless you pick strict anonymous mode.
Features and releases
Discovery → adoption → success per feature, and each version’s before and after.
Crashes and revenue
Crash issues and subscription revenue next to the same usage.

When Aptabase is the better choice.

You want to self-host an open-source server.
You ship on many platforms, from Android to game engines.
You want strictly anonymous counts and nothing else.

Questions about switching from Aptabase.

Can Union be as anonymous as Aptabase?

A project in strict anonymous mode stores no identifier across sessions; people, profiles and per-person retention are then unavailable by design.

Other comparisons.

See who is using your app right now. Your first 100,000 events a month are free.

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