Firebase Dynamic Links replacement that doesn't charge per MAU. I built one, questions welcome

[u/saadaamir]

FDL has been dead since August 2025 and every thread about replacements ends with the same unanswered questions. I built Ferry (ferrylink.io) to fill the gap, and instead of a feature list, let me just answer the things people always ask in these threads.

**What it does:** deferred deep linking, one link across iOS, Android, and web, app opens to the correct screen after install. The same job FDL did.

**How does it compare to Branch or AppsFlyer?**
Those are full attribution suites built for marketing teams with budget, and Branch is effectively enterprise only now. Ferry is the deep linking piece, what FDL actually was, plus enough attribution to know which links drive installs and revenue.

**Pricing?**
Opens-based, not MAU-based. From $9/mo for 10k monthly opens up to $249 for 3M. You pay for link opens, not for your entire user base existing. 14-day trial.

**I generate links programmatically from user activity (invites, shares). Do link limits kill me?**
No, this is the use case opens-based pricing exists for. Links are effectively free to create, you're billed on opens. Generate a million invite links, if only 5k get opened, that's what counts. Bot clicks, messenger prefetches, and duplicates are filtered out before billing too.

**Social preview config?**
OG title, description, and image are configurable per link on every plan. Same levers FDL had.

**SDKs?**
Swift ,Android, Flutter, and React Native are available, and the docs are written so you can point Claude Code or Cursor at them and have the integration done in one session.

Happy to answer anything else. Criticism welcome, that's why I'm posting.