Sonae Sierra
Sonae Sierra
Assistant

Knowledge Assistant

One AI workspace for a workforce of thousands

SierraGIA gives every Sonae Sierra employee a single place to access company knowledge, run specialist agents, and get cited answers from the documentation that governs their work.

Measured impact

~550

active users

150k

messages in last 3 months

80%

cost reduction vs GPT Enterprise

The challenge

Employees had two options: pay per-user licences for consumer AI tools with no governance, no integration with internal systems, and no way to share knowledge at scale, or go without entirely. Leadership wanted AI deployed across the organisation, but not in a way that created new compliance risk or fragmented adoption into a dozen disconnected tools.

The requirement was clear: one governed workspace, accessible to the whole workforce, with a cost model that scaled with usage rather than headcount.

Sonae Sierra went from no governed AI capability to a platform used by 550 employees generating thousands of messages in three months. The same platform that serves the general assistant today is expanding into Legal, Finance, and Operations, each running on the same governed foundation.

The solution

DareData deployed SierraGIA, the Sonae Sierra general assistant, as the foundation for the organisation's AI capability.

Through SierraGIA, employees access agents configured for their specific functions, with answers grounded in the organisation’s own knowledge - operational procedures, legal documentation, HR policies, commercial guidelines - and every response citing its exact source. Access is managed via the organisation’s existing Entra ID groups and single sign-on, so governance and permissions are inherited directly from the identity infrastructure already in place.

On top of this foundation, specialist agents have been built and continue to expand. SOMA, the Sierra Operations and Management Agent, supports procedures that govern the company’s shopping centres. A Legal agent answers questions grounded in contracts and policy documentation. An MS Office 365 agent helps employees manage calendars and prioritise their inbox.

Underneath every agent is the GenOS Platform. Usage is visible across teams and functions: which agents are being used, which knowledge sources drive the most queries, and where coverage is missing. As Sonae Sierra adds new agents and new knowledge sources, the same governance model and controls apply.

What was deployed

SOMA (Sierra Operations and Management Agent)

Shopping centre operational procedures, with answers grounded in the documentation that governs day-to-day operations across the portfolio.

Legal Agent

Contracts and policy documentation, giving legal and compliance teams cited, auditable answers inside the same workspace.

MS Office 365 Agent

Calendar management and email prioritisation, connected to the Microsoft 365 tenant.

How it works

See the full workflow

5 steps, end to end

Step 01

Employee opens SierraGIA and selects a general agent to ask a question, upload a document, or run a web search — or picks a specialist agent scoped to their team's knowledge.

Step 02

The agent retrieves answers from authorised knowledge sources: SharePoint, internal documentation, curated content.

Step 03

Every response surfaces the exact source and passage behind it.

Step 04

The employee can ask follow-up questions, generate a file, or take an action directly from the workspace.

Step 05

The GenOS Platform monitors usage, surfaces knowledge gaps, and keeps agents improving based on real conversations.

Drag to explore · 5 steps
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Why this matters

Production AI improves when every decision is measurable, traceable, and owned.

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Next step

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