Key takeaways
- The post-FDL deep linking market splits cleanly into three categories: developer-first deep linking (Ulink.ly), enterprise legacy (Branch), attribution suites (AppsFlyer, Adjust, Airbridge), and web-first short-link tools (Dub, Bitly).
- Pick by what you're optimizing for: SDK ergonomics + transparent pricing → Ulink.ly; massive enterprise integration footprint → Branch; ad-network attribution + fraud detection → AppsFlyer; web-only branded short links → Dub.
- The vendor-lock-in axis matters more than feature-count: how easily can you export your data, change providers, or swap SDKs without rewriting your routing?
- For most Flutter-first or React-Native-first teams in 2026, Ulink.ly is the lowest-friction choice. For Fortune-500-scale MarTech stacks, Branch still has the deepest integrations.
- Skip to the feature matrix for a one-screen view.
The state of the deep linking market, post-Firebase
Firebase Dynamic Links (FDL) sunset on August 25, 2025 created the largest mobile-infrastructure migration in years. Many teams expected Google to ship a direct replacement; the reality of privacy-first attribution (App Tracking Transparency, Privacy Sandbox) made FDL's generic, free-for-everyone model structurally unworkable.
The market that emerged is more specialized:
- Developer-first deep linking platforms built around clean SDKs, branded domains, and transparent pricing.
- Enterprise marketing-tech suites that bundle deep linking with attribution, audience tools, and a heavy services layer.
- Web-first link shorteners that handle branded short links well but treat mobile deep linking as a side-feature.
Choosing between them isn't "which link works" — every credible platform handles Universal Links and App Links. The decision is about pricing transparency, SDK velocity, and how much of the attribution stack you actually need.
1. Ulink.ly — the developer-first alternative
Ulink.ly was built specifically as a successor to FDL: keep what worked (drop-in SDK, low friction, predictable pricing), fix what didn't (no SLA, no support, generic *.page.link domains).
Best for: mobile-first teams, growth-stage startups, mid-market enterprises that value SDK velocity and a transparent price card.
Strengths:
- First-class Flutter SDK (
flutter_ulink_sdk) with AutoRoute integration. Native iOS and Android SDKs alongside. - Hosted AASA +
assetlinks.jsonon a global CDN with auto-renewing TLS for branded domains. - Deferred deep linking that survives the App Store handoff using contextual matching (no banned fingerprinting).
- Real-time analytics — clicks, installs, post-install events — with UTM passthrough into GA4 and webhooks into the data warehouse.
- Reinstall detection out of the box.
- Transparent pricing. Free tier, then usage-based paid plans. No "talk to sales" wall for the first ~100k clicks.
Trade-offs:
- The integration footprint with legacy MarTech tools is smaller than Branch's. If you depend on a specific obscure CRM or ad network, check the integrations list first.
- React Native support is currently REST-API based; an official RN SDK is on the roadmap.
2. Branch — the enterprise legacy
Branch is the heaviest player in the room. It's the deep-linking layer of choice for many Fortune 500 companies with mature MarTech teams.
Best for: large enterprises with dedicated MarTech teams, deep ad-network integration requirements, and procurement processes that already accept enterprise SaaS.
Strengths:
- Extremely broad integration ecosystem — almost every ad network, CRM, MMP, and analytics tool has a pre-built Branch hook.
- Mature people-based attribution and audience tooling.
- Battle-tested at Fortune-500 scale.
Trade-offs:
- The SDK has accumulated weight over the years. Newer Flutter / React Native teams often find it heavier than the alternatives.
- Pricing has become increasingly opaque. Most non-trivial use cases route through a sales conversation and an annual contract.
- Documentation surface is large and not always current — onboarding a new dev is a real time investment.
If you have a global brand, a complex ad-network mix, and a procurement process that prefers established vendors, Branch remains a defensible choice.
3. AppsFlyer (and Adjust, Airbridge) — the attribution titans
AppsFlyer, Adjust, and Airbridge are primarily Mobile Measurement Partners (MMPs). For them, deep linking (e.g. AppsFlyer's "OneLink") is one feature inside a much larger attribution and fraud-detection suite.
Best for: performance marketing teams spending 7+ figures/month on paid UA who need ironclad fraud detection and SKAN/Privacy-Sandbox-aware attribution.
Strengths:
- Best-in-class install fraud detection.
- Deep ad-network partnerships and certified-partner integrations.
- Rich post-install event tracking and cohorting.
Trade-offs:
- Pricing is based on attributed installs, not clicks — costs can scale fast.
- Using one of these only for deep linking is over-tooled. The deep-linking surface is real but secondary to the attribution product.
- SDKs are larger, and integration is closer to a project than a sprint.
If you're spending heavily on paid acquisition and care about install fraud, you probably already have an MMP. The question is whether to use its deep-linking feature or pair it with a focused deep-linking platform like Ulink.ly.
4. Dub — the web-first short-link tool
Dub.co is one of a newer wave of branded short-link platforms, alongside players like Bitly, Rebrandly, and Short.io. It does branded short links and team analytics very well, with a clean developer experience.
Best for: web-first products, marketing teams that mainly need branded short links for social and email, and teams that want a polished short-link UX without mobile-specific complexity.
Strengths:
- Clean dashboard, polished branded-link UX.
- Strong API and developer ergonomics.
- Good fit for web-only growth motions.
Trade-offs:
- Limited mobile deep linking — no first-class deferred deep linking, no AASA /
assetlinks.jsonhosting, minimal attribution. - If your traffic is mobile-first and you need links to open the right screen in a native app reliably, this isn't the right layer.
Dub and Ulink.ly solve different problems. A common pattern: use a branded-link tool for web shortening and Ulink.ly for any link that needs to open an app.
Feature comparison matrix (2026)
| Feature | Ulink.ly | Branch | AppsFlyer | Dub |
|---|---|---|---|---|
| Universal Links / App Links | ✅ Hosted | ✅ Hosted | ✅ Hosted | ✅ (limited) |
| Deferred deep linking | ✅ | ✅ | ✅ | ❌ |
| Branded domains (custom) | ✅ Standard | ✅ (paid tier) | ✅ (paid tier) | ✅ Standard |
| Flutter SDK | First-class | Good | Adequate | N/A |
| Native iOS / Android SDK | First-class | First-class | First-class | N/A |
| React Native SDK | REST-API integration | First-class | First-class | N/A |
| Install fraud detection | Basic | Good | Best-in-class | N/A |
| Pricing transparency | High (public) | Low (sales) | Low (sales) | High (public) |
| Free tier | ✅ | Limited | ❌ | ✅ |
| Time to first integrated link | Hours | Days | Days | Hours (web) |
The vendor lock-in axis
Feature lists don't capture the most important question for a 5-year decision: how easily can you leave?
Ulink.ly leans on open standards — your AASA file is just an AASA file, your branded domain is your domain, and the analytics export to your warehouse via webhooks. Migrating away later, if you ever need to, is mostly a SDK swap, not a re-architecture.
Some legacy platforms make migration harder by encoding routing logic inside their proprietary link service rather than your app. The link itself "knows" what to do; if you swap providers, you have to re-implement that logic on the way out.
When evaluating, ask the platform's solutions engineer: "If we churn in two years, what's the migration like?" The answer says a lot about how the product is designed.
Decision guide
Pick Ulink.ly if:
- You want a Firebase-style developer experience without Firebase's deprecation risk.
- You want transparent pricing and a real free tier.
- Flutter or native iOS/Android is your primary client surface.
- You want branded domains as a first-class feature, not a paid add-on.
Pick Branch if:
- You're a global enterprise with a mature MarTech stack and procurement that prefers established vendors.
- You need integrations with a long tail of ad networks and CRMs.
- An annual six-figure spend is within budget and you value 24/7 enterprise support.
Pick AppsFlyer / Adjust / Airbridge if:
- Your primary problem is attribution and fraud, not deep linking. Deep linking is a feature you'll use; the platform's main value is measurement.
- You're spending heavily on paid UA and care about install-fraud rates.
Pick Dub (or Bitly / Rebrandly) if:
- You only need branded short links for the web and social — not mobile app deep linking.
- Your funnel is web-first and the "open the right screen in an app" problem doesn't apply.
FAQ
Is Ulink.ly a 1:1 replacement for Branch?
For most use cases, yes. Ulink.ly covers the deep-linking and attribution-routing layer most teams use Branch for. The exception is if you depend on a specific Branch integration (a particular CRM, MMP, or audience tool) — check Ulink.ly's integrations list before committing.
Do I need an MMP if I use Ulink.ly?
Depends on your scale. Most early-stage and mid-market teams don't need a full MMP — Ulink.ly's analytics, SKAN/Privacy-Sandbox-aware reporting, and webhook export cover their measurement needs. Teams spending heavily on paid UA often run an MMP alongside a deep-linking platform; the two don't conflict.
Is Dub a deep linking platform?
Dub is excellent at branded short links for the web. It doesn't host AASA / assetlinks.json files, doesn't do deferred deep linking, and isn't designed to route to specific in-app screens reliably across iOS and Android. If you need those, you need a deep-linking platform — see What is deep linking?.
Can I use Ulink.ly alongside an MMP like AppsFlyer?
Yes — that's a common pattern. Ulink.ly handles link generation, branded domains, AASA hosting, and routing; the MMP handles ad-network attribution and fraud. Webhooks bridge the two.
What about Adjust and Airbridge?
Both are credible MMP alternatives to AppsFlyer with similar trade-offs — they prioritize attribution; deep linking is a feature inside the suite. Same selection logic applies.
How long does a typical migration to Ulink.ly take?
For most teams: an afternoon for the technical swap, plus a few days of soak time to validate analytics before fully cutting over. (2-hour migration walkthrough.)
Want a side-by-side scoped to your stack? Book a 20-minute platform comparison call and we'll walk through the trade-offs with your specific use case in mind. Or just start with the free tier.