When Foundry is the right choice over Copilot Studio
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Use Foundry for multi-agent systems, bespoke logic, custom models, fine-grained private-data retrieval, production requirements and engineering ownership.
TL;DR
Choose Agent Builder for one-person tasks, Copilot Studio for team solutions and Foundry for multi-agent or bespoke logic, custom models, private-data retrieval, production-grade requirements or engineering ownership. Establish guardrails, assign ownership to the business that knows the rules, and design human decision points into the process before building.
Original by Karl-Johan Spiik, on Karl-Johan Spiik, Microsoft MVP. Read the original
This is our own summary, not a republication or full translation.
Governance takeaway
- Makers: Choose Copilot Studio when team use, system actions and low-code delivery fit the need, but move to Foundry when custom logic or production-grade requirements exceed its scope.
- Admins/CoE: Define guardrails, lifecycle ownership and human decision points before agents are built, so teams can work at scale within clear parameters.
- Leadership/Business: Name the business owner who understands the process rules, assess the cost of errors, and start with desired outcomes rather than technology.
Frequently asked questions
When should a team choose Foundry over Copilot Studio for an agent?
Choose Foundry for multi-agent or bespoke logic, custom models or data, engineering ownership, production-grade requirements, or fine-grained private-data retrieval.
How can organisations assign ownership for an AI business process?
Assign ownership to the business unit that understands the process rules, rather than defaulting ownership to IT, especially when regulations change.
How quickly can Copilot Studio and Foundry costs be seen?
Copilot Studio costs appear after 24 to 48 hours, while a Foundry demo retrieved costs in real time per agent through the Azure API.