Agency vs in-house for Shopify integrations: what to own (and what to rent)

The failure mode is “everybody owned it”

Integrations rot when:

• credentials live in one person’s inbox,
• nobody knows which app owns a webhook,
• and “the agency built it” but the agency is not allowed production access anymore.

You need an explicit ownership map — not vibes.

Own inside your business

Usually keep in-house:

• business rules (what “synced” means),
• finance approvals,
• vendor relationships and billing,
• and incident escalation paths.

Rent specialist execution (often an agency)

Often outsource:

• initial hardening (idempotency, retries, logging),
• complex theme performance work,
• and building the first version of an internal dashboard.

We still document like we are leaving tomorrow: runbooks, access boundaries, and monitoring hooks — see integration health monitoring.

Contracts matter more than loyalty slogans

Define SLAs for:

• who responds to integration failures,
• how changes are tested before production,
• and how secrets are rotated.

Security basics: tokens and least privilege.

When “in-house only” is correct

If you are regulated, high-volume, or you already have strong platform engineering, in-house ownership can be cheaper than coordination overhead.

Next step

Send your current integration list and who maintains each line today. We will propose an ownership map — whether we stay involved or not.

Services: API integrations · Contact: Contact.