Outsource to Insource Rhythm
A healthy company outsources early to build a capability and insources later to own it.
The part everybody skips is the hand-off. If the two teams do not work side by side for a while, the knowledge stays with the vendor and you pay for it twice.
Outsource early to build capability
Early on, an outside partner gets you past a gap you cannot staff yet. The point is to leave the engagement knowing how to do it yourself. A good early engagement teaches you what good work looks like in a function you do not understand yet: what questions to ask, what to pay for, what "done" means. Done right, you exit with a capability you can run without them.
Insource later to build equity
Once the capability matures, bring it in-house. That builds equity: institutional memory, faster iteration, and less dependence on somebody else's roadmap. The work becomes part of who you are, and a vendor's priorities no longer decide yours. Equity here means owning the thing that makes you different.
The hand-off discipline
Vendors and your new hires build together for a stretch. That beats throwing it over the wall every time. The insource decision is rarely the failure. The failure is treating it as a switch. The knowledge lives in the vendor's heads and in the parts of their repo nobody wrote down. You get it back by working next to them while it is still warm.
The "plop" anti-pattern
The most common failure: hand a new hire a codebase they did not build and a Slack thread they never saw, and expect continuity. It does not come. Context that was never written down evaporates, and the company quietly pays again for lessons it already bought. The rhythm only works if the transition is overlapped, documented, and on purpose. Weeks of co-working, not a Friday handoff email.
One-line takeaway
Outsource to learn. Insource to own. The rhythm lives in the overlap.