We write here only about what we have actually done: decisions taken on real projects, and what became clear from them once the systems were already running in production. No general advice, no theory.
From the blog
When to build custom software and when to buy off the shelf
Four questions that decide whether to build a custom system or buy off the shelf — regulation, existing systems, who changes it next year, and the real cost. With examples from systems running in production.
See the productConnecting a new system to the ones an organisation already runs
The hard part of integration is not the protocol but identity, the source of truth, availability and responsibility. Connecting to a legacy system with no API, working with the incumbent vendor, and not breaking what works.
See the product