The Firefly Team

Why More Proxy Providers Are Building Their Own Apps

There’s a clear shift happening: fewer providers are shipping a bare subscription link and calling it done — more are building their own client apps. Some read this as a cash grab, others as vendor lock-in. Looked at from the technical and operational side, though, there’s a real problem being solved here.

First, a correction: a proprietary client doesn’t mean stronger encryption

A lot of marketing copy claims a proprietary client is “more secure” or “better encrypted.” That’s not accurate, and it’s worth clearing up first. What actually encrypts and disguises your traffic is the protocol — for example, VLESS paired with Reality transport. Given the same server config, connecting through an official app or through Clash Verge Rev uses the same protocol and the same encryption layer. The client is a shell around the protocol, not the encryption itself.

So what does a self-developed client actually fix? Not the crypto layer — the structural risk baked into the subscription link itself.

A subscription link is, at its core, a URL that works for anyone who has it. It gets screenshotted into Telegram groups, forwarded to friends, synced into cloud backups, even collected into lists posted on forums or GitHub. Once it’s out, the provider has no control over where it ends up.

This isn’t a hypothetical risk. The Great Firewall does active probing: given a suspected server address, it can send crafted packets to confirm the protocol in use and block that IP directly. And most nodes are shared across many users — on a shared relay line, once one node gets flagged, every user on that line pays for it, whether or not they personally leaked anything. The copyability of a subscription link turns individual carelessness into a shared, unavoidable risk for everyone on that node.

What a proprietary client actually changes

A self-developed client isn’t a reskinned subscription link — it turns “getting a node” from “hitting a public URL” into an authenticated call tied to an account or device. That enables a few things a bare link can’t:

  • Node data stops being copy-paste plaintext, cutting down on bulk scraping and redistribution.
  • Abuse becomes detectable. If one account is suddenly active from thousands of different IPs at once, that’s an obvious sign the subscription has been resold or leaked — the provider can throttle or revoke it instead of watching the whole node get dragged down.
  • Switching nodes doesn’t require the user to do anything. If a node gets interfered with, the app can fail over in the background, no manual re-import needed — part of why we built Firefly’s client to be a self-developed app that connects like a VPN, one tap, no manual configuration.

Does that mean Clash Verge Rev, Shadowrocket, and the rest are off the table?

No. To be fair, for anyone willing to put in the time on routing rules, open-source clients like Clash Verge Rev, Shadowrocket, v2rayN, and sing-box have real advantages: they’re auditable, there’s no vendor quietly phoning data home, and you get fine-grained per-domain, per-app routing that most proprietary apps still can’t match.

The catch is that this category of client structurally depends on a link you can import, export, and share — that’s not a case of any particular user being careless, it’s how these clients are built to work. A link sitting in a local config file, synced to the cloud, screenshotted, forwarded — the odds of it leaking somewhere are higher than most people assume. It’s a commons problem: the more a link circulates, the more likely the node gets specifically targeted and blocked, and the fallout lands on everyone on that node, not just whoever leaked it first.

Why smaller providers are more likely to fold

This shows up most starkly with free public services that hand out subscription links every day. Free links are usually posted somewhere public and get scraped and blocked almost as fast as they go out — it’s a large part of why free providers have a well-known reputation in the community for not lasting long.

Smaller paid providers see a milder version of the same pattern: the more loosely a subscription link circulates, the more often nodes get blocked, and the more complaints and cancellations follow — which compounds with margins that are already thin, and is one real contributor to why some smaller providers eventually shut down (not the only one — deliberate exit scams are a separate issue, covered in our scam-avoidance guide). Larger, more established providers generally have more reason to invest in a proprietary client to close this gap in the first place, which is itself a decent signal for how seriously a provider takes the business.

Bottom line

A proprietary client isn’t a marketing gimmick or a lock-in play — it removes the friction-free copying, reselling, and scraping that a bare subscription link enables, which makes the whole thing more sustainable for everyone sharing a node. Firefly runs IPLC dedicated lines end to end, VLESS with Reality, and a self-developed client for one-tap connection, with several plans to choose from — treating node stability as something worth protecting long-term, not a resource to burn through once.