Open core · self-serve · one SDK

From the first tap to the last payout.

Deep links, referrals, segmented push and ad revenue from one SDK, on devices you can prove are real. Built for Swift, Kotlin, Flutter, Expo and the web.

Get started View on GitHub 22

Live demo of the Links module: create a real link on the Vouch resolver and watch how it resolves on every platform.

No link yet

Create one on the left. Then see exactly how it resolves on an iPhone, an Android phone, a laptop, inside Instagram and for a Slack preview bot.

The platform

Five modules. One SDK. Everything from the first tap to the last payout.

Links are how users arrive, push is how they come back, and monetization is what the traffic earns you meanwhile. All of it shares one identity, one event stream and one dashboard.

Acquire
Links
One URL that opens the right screen on every device, installed or not, with the store hop handled.
Grow
Referrals
Invite programmes with rewards, caps and fraud checks, live in a day.
Protect
Security
Attestation and signed requests so only your app on a real device gets through. Mobile only.
Keep
Push
Message the people it is for, on iOS, Android and the web, chosen by what they have done and what they have paid.
Earn
Monetization
Skip the AdSense application, the traffic bar and the payment chasing. Bring impressions, install one tag.

First-class on day one

iOS
Swift
Android
Kotlin
Flutter
Expo

App Store
Google Play

Five modules, one SDK

Every growth channel a mobile app needs

Acquisition, retention, protection and revenue, from the first tap to the last payout. Each module is useful on its own, and none of them requires a second package.

Links

One URL that opens the right screen, installed or not.

Universal Links and App Links with association files hosted and monitored for you. Deferred deep linking that is deterministic where the platform allows it and honest where it does not.

Association files generated, served and checked hourly
Install Referrer on Android, clipboard token on iOS, probabilistic only as a labelled fallback
Link Doctor: find out why a link is broken before your users do

Links documentation

Referrals

An invite-a-friend programme in a day, not a quarter.

Personal links and codes, attribution through the store on both platforms, qualification rules, rewards, clawbacks and a review queue for anything that looks wrong.

Two-sided rewards with caps, tiers and A/B tests
Self-referral and velocity checks on by default
Ready-made invite and rewards screens, themeable

Referrals documentation

Security

Know a request came from your app, on a real device.

Play Integrity and App Attest handled end to end, run tokens that sign every request, and a policy layer you can run in monitor mode before you enforce anything.

No Firebase dependency, no sales call
Degraded verdicts for devices that cannot attest, never a hard failure
Gateway and middleware for Go, Node, Python, Dart and the edge
iOS and Android only: browsers cannot attest, and we will not pretend otherwise

Security documentation

Push

Message the people it is actually for.

Audiences built from what Vouch already knows: where a device came from, what it has done, and what it has paid. Notifications open through your links, so a push is attributed like any other click.

Your own APNs key and FCM service account, so Vouch sends as you and no third party holds your tokens
Segments over spend and behaviour: top depositors, lapsed depositors, funded but inactive
Frequency caps, quiet hours and a suppression list with no override

Push documentation

Monetization

Ad revenue without the AdSense part.

No AdSense application, no traffic bar to argue about, no payment to chase. Apply once, install one tag, and our Google Monetization partner fills your ad space. If you have impressions, you have most of what this needs.

One application, reviewed by a person, with the reason given either way
A wallet you can read: gross, our share, and net, on every statement
Payouts in USDT, USDC or bank transfer, local or in USD

Monetization documentation

Period	Gross	Our share	Net
August	$1,840.00	$92.00	$1,748.00
July	$1,410.00	$70.50	$1,339.50

How it works

Three steps to your first growth channel

Install one SDK, switch on the modules you need in the dashboard or API, ship. Everything else is our problem.

1
Install one SDK
One package per platform. Flutter and Expo wrap the native SDKs, they never reimplement them.
2
Configure
Register your app, connect a domain, and turn on the modules you need. Vouch generates and monitors the association files for you.
3
Ship
Links open the right screen, referrals qualify, web purchases land in the app, and the dashboard tells you which channel did the work.

Swift PM

// Package.swiftdependencies: [  .package(url: "https://github.com/vouch-dev/vouch-ios", from: "1.0.0")] // App startimport Vouch Vouch.configure(publishableKey: "pk_live_…", environment: .live)Vouch.onLink { link in  router.open(link.destination, params: link.params)}

Planned API. Package names are provisional until the final name and package scopes are secured.

Open source

Open core, readable by design

The Links server, the Security verifier and gateway, and every SDK are open source. Hosted services, cross-customer intelligence and payouts are how we make money.

Component	Licence	Why
Client and server SDKs	MIT	No friction shipping in your binaries
Links server and resolver	AGPL-3.0	Self-hostable, protects against unlicensed resale
Security verifier and gateway	AGPL-3.0	Trust through readability
Dashboard (core)	AGPL-3.0	Complete self-host experience
Referrals, Push, Monetization	Commercial	Depend on hosted credentials, payouts and a partner relationship

Self-host in one binary

Self-host with a single Go binary plus Postgres. Redis is optional. Docker Compose and a Helm chart are maintained.

Go binary+ Postgres+ optional Redis

Stars: 22
Contributors: 2

Repository Self-hosting guide

Compared

Where Vouch fits

A factual comparison against the tools most teams are migrating from or building themselves.

	Vouch	Firebase Dynamic Links	Branch	Homegrown referrals
Status	Available: open source and hosted	Discontinued August 2025	Active, enterprise-oriented	Depends on your team
Platform support	iOS, Android, Flutter, Expo first-class	Was iOS, Android, Flutter (unmaintained)	iOS, Android, plus wrappers	Whatever you build
Deferred deep linking method	Deterministic first (Install Referrer, clipboard token, session), probabilistic labelled as such	Probabilistic with clipboard fallback	Typically probabilistic plus deterministic where available	Usually none, or probabilistic
Self-hosting	Yes, single Go binary + Postgres, AGPL-3.0	No	No	By definition
Pricing model	Free tier, then monthly active devices	Was free	Typically usage-based with sales-led tiers at scale	Engineering time
Setup time to first link	Target: under 15 minutes per SDK	n/a	Varies	Days to weeks
Referral programmes	Built in, with fraud controls	No	Available	Build and maintain yourself

Competitor details reflect public information at time of writing (September 2026) and may change. Vouch rows describe planned scope, not shipped features.

Pricing

Priced like infrastructure, not like an agency

The hosted service is metered on monthly active devices, which follows the SDK's footprint and is hard to game. It starts at $25 a month for one app, with a fortnight to try it. What is free is the open-source build, which you run yourself, security included.

See plans and the device calculator

Open source
Run the whole thing yourself, including device security.
Starter
One app on the hosted service, with links, security and push included.
Pro
Referrals, three apps, custom domains and webhooks.
Growth
Unlimited apps, longer retention and data export.
Scale
SLA, SSO, audit export, risk intelligence, dedicated support.

Go-to-market infrastructure that behaves like infrastructure

Correct on the hard path, honest about attribution, priced as a small fraction of what the stores already take.

Get started Read the docs