Build vs buy
Build the edge. Buy the operating foundation.
Nobody needs to choose between building everything and buying a suite. The useful questions are simpler: what creates your edge, what is plain infrastructure, and how fast can each path deliver.
| Question | Build | Legacy suite | QuantJourney |
|---|---|---|---|
| Control | Maximum control | Broad coverage | Modular products |
| Implementation | Engineering burden | Heavy implementation | Integrate selectively |
| Workflow fit | Firm-specific | Vendor-defined workflow | Your workflow |
| Maintenance | Your team owns it | Vendor dependency | QJ maintains common infrastructure |
The question is not whether to build or buy everything. It is where direct control creates an advantage, and where shared infrastructure removes work without replacing your operating model.
Build anyway
Three things to keep in-house whatever you buy.
Thesis and house view
The judgement that makes the firm the firm. Keep it inside, versioned, reviewable.
Signals, models and constraints
The logic that creates edge and needs frequent iteration. Own it and keep it inspectable.
Firm-specific analytics
Build the differentiated view on top of governed data through the SDK and MCP, not from raw vendor feeds.
See QuantJourney on your workflow.
A private walkthrough of Data Gateway, Backtester and OneBook around the way your team works.