A founder asked me whether he should set up a bug bounty program instead of paying for a security review, reasoning that a bounty only costs money when something's actually found. It's a fair instinct on cost. It misses a structural difference between the two that matters a lot for a small, early app specifically.
What a bug bounty actually is
A bug bounty program invites outside researchers, anyone, really, to look for vulnerabilities in your live app and report them in exchange for a payment, usually scaled to severity. It's a real, proven model, and plenty of large companies run one successfully. The mechanism it relies on is volume and reputation: enough serious researchers need to find your program worth their time for it to actually get meaningful attention.
Why that mechanism doesn't really work yet for a small, unknown app
Independent researchers allocate their time based on what's worth it: bigger payouts, bigger platforms, more interesting attack surface, more reputation to be gained from a public disclosure. A brand new app with a handful of users and a modest bounty budget is competing for attention against every other program on the same platform, including large, well-known companies offering far bigger payouts. In practice, this usually means a small program either gets very little serious attention, or gets attention from less experienced researchers submitting low-severity or invalid reports, both of which cost you real time to triage without necessarily surfacing your actual, serious risks.
What a hired auditor actually guarantees instead
Paying someone directly to review your app buys a specific, scoped block of dedicated attention, on a schedule you control, regardless of how interesting your app happens to look to the broader research community. For a small app, that's usually the more reliable way to actually get a real, competent look at your specific risk, rather than hoping the right person happens to notice your bounty listing and decide it's worth their time.
So which one, and when
- Early on, with a small user base and no dedicated security budget yet: a scoped, one-time hired review gets you a guaranteed look, on a timeline you control.
- Once you have real scale, a recognizable name, and an established security program already in place: a bug bounty becomes a genuinely useful supplement, because at that point your program is actually competitive for serious researchers' attention.
- A bounty program launched too early, before you have either scale or an established internal security process, often produces mostly noise: low-quality reports that cost real time to triage, with no guarantee anyone experienced ever looks seriously.
Both are legitimate tools. They're just built for different stages, and the 'you only pay if something's found' framing hides the fact that a bounty program's real cost, for a small app, is often the triage time spent on reports that never surface anything that actually mattered.