Your teams have already built the tools: a reconciliation sheet turned app in finance, a dashboard three people quietly depend on in ops. BYOA takes what they built, in whatever state it's in, and rebuilds it on jig with enterprise-grade auth, governance, and support.
Why BYOA
Most operations teams we speak to have already built the tools. What they haven't built is anywhere for those tools to live safely.
Built quickly to solve a real problem. It has no owner, no auth layer, and no place in the security review.
Nobody remembers exactly how it was built. It works, until the person who built it changes teams.
Each team solved its own version of the same problem independently, with three different logics and zero shared data.
The usual instinct is to shut these down or rebuild from scratch. Both waste the part that's genuinely valuable: the tool already encodes how that team actually works, the hardest thing to specify and the easiest thing to lose in a rebuild.
What we accept
The state of the app changes how long the rebuild takes. It doesn't change whether we can accept it.
An HTML file someone prompted into existence. It runs in a browser and nowhere else. That's a valid starting point.
Something further along that was never deployed anywhere. Working code, no infrastructure underneath it.
Deployed on a personal account somewhere, quietly load-bearing. We rebuild it properly without a disruptive migration.
What doesn't change: whichever state your app arrives in, BYOA runs the same pipeline against it. The rebuild is priced by complexity, not by how polished the original version was.
Five steps take an app from whatever state it's in to a supported tool on your platform. The middle three are what make BYOA different from a rewrite.
You submit the app in whatever form it exists: file, repo, or deployed URL.
Our pipeline takes the app apart and extracts what it does, not just how it was written.
That behaviour is converted into a structured specification: rules, data model, workflows.
The spec is ingested into your jig knowledge base, alongside your other tools.
We build the app on the jig stack, with the platform layer applied from the start.
Steps 2 and 3 are proprietary to jig. Decomposition and spec generation are what separate BYOA from a rewrite: the business rules your team already worked out get captured as durable documentation in the knowledge base, rather than staying locked inside code nobody has read. The next change to that tool starts from a written understanding of what it does, not from someone reverse-engineering it under time pressure.
Before and after
The logic your team built stays exactly the same. Everything underneath it doesn't.
Dimension by dimension
The logic is preserved. Everything that made the original risky to depend on is not.
| Dimension | Decentralised vibe-coded apps | BYOA |
|---|---|---|
| Authentication | Configured per app by whoever built it, or absent entirely | One standard auth layer applied to every tool on the platform |
| Compliance & governance | Rarely reviewed; data access is whatever the tool happened to be given | Governed centrally, with data access defined at the platform layer |
| Security posture | Depends on what the model generated and what nobody checked afterwards | Rebuilt on a reviewed stack, with the same standards across every tool |
| Architecture | Shaped by prompt history; logic and schemas duplicated across tools | Rebuilt against a specification, with shared data definitions |
| Look & feel | Different in every tool, since each was generated independently | Standardised across your whole estate, so staff learn one interface |
| Documentation | The prompts that produced it, held by one person, usually gone | A structured spec in your knowledge base, readable by anyone |
| Ongoing support | The original builder, subject to their availability and tenure | Standard jig support; bug fixes covered, changes as new sprints |
| Ownership | Yours, but only as long as someone can still run and change it | Yours, with all code and data exportable at any time |
The honest trade-off: BYOA is a rebuild, not a wrapper. It takes sprint time, and the version that comes back may behave differently in edge cases the original handled by accident. What you get for that is a tool your security team can sign off on, and someone other than the original builder can change.
When to leave an app alone
BYOA earns its cost when a tool has become load-bearing. It doesn't always earn its cost otherwise.
A script one person runs once a quarter against data nobody else touches carries little risk. Formalising it adds cost without reducing much. The same is true of genuine throwaways: something built to answer one question during a specific project, which nobody expects to run again.
BYOA earns its cost when a tool has become load-bearing, when more than one person depends on it, or when it touches data you would have to explain in an audit. That's most of the tools your teams built and kept using.
Vibe coding produced something valuable inside most enterprises: a large body of tools that reflect how work actually happens, built by the people who do that work. The problem was never the building. It was that each tool arrived without the layer underneath it that makes software safe to depend on.
BYOA separates those two things. Your teams keep building; the platform layer stops being something each of them has to reinvent badly.
Get started
Discovery is free, and you see working software before you commit to anything further. This applies regardless of how the app was built or what shape it arrived in.
Book free discovery →BYOA runs on the same sprint pricing as everything else jig builds: $3,000 per active sprint week, scoped after we've seen what you're bringing in. Hosting is billed separately, and your first tool is hosted free.