Self-hosting vs SaaS for document generation
4 June 2026 · 8 min read · Nextarp B.V.
Every document-automation decision eventually reaches the same fork: send your data to a SaaS API, or run the engine yourself. For sensitive documents, the answer is rarely just about convenience.
The data-residency question
Generating a document means sending the data inside it - names, financials, health information - to whatever service renders it. With a SaaS API, that payload leaves your boundary on every request. For regulated data, that alone can rule SaaS out or trigger heavy contractual work (DPAs, sub-processor reviews, data-transfer assessments).
Total cost over time
Per-document pricing is cheap at low volume and punishing at scale. Self-hosting trades a fixed operational cost (a container, a database, some monitoring) for unlimited generation. The crossover point arrives faster than most teams expect.
Control and longevity
- Availability - your document pipeline no longer depends on a vendor's uptime.
- Versioning - you decide when to upgrade, not the vendor.
- Air-gap capability - self-hosting is the only path to fully offline generation.
When SaaS still wins
For low-volume, low-sensitivity documents where you want zero operations, SaaS is the pragmatic choice. The point is to decide deliberately, not by default.
A middle path
DocsNG ships as a Docker image you run on your own infrastructure or from a cloud marketplace - SaaS-like convenience to deploy, but your data, keys and documents never leave your environment.
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