EPC Group vs Slalom: Microsoft Fabric Implementation Partner Comparison (2026)

EPC Group vs Slalom: Microsoft Fabric Implementation Partner Comparison (2026)

Updated: April 26, 2026 · By: Errin O'Connor, Founder & Chief AI Architect, EPC Group · Reading time: 16 min

For Fortune 500 firms shortlisting Microsoft Fabric implementation partners, EPC Group and Slalom both appear in most enterprise procurement RFPs. This is the honest head-to-head.

TL;DR

Where EPC Group wins

• Capacity sizing methodology. EPC Group's 4-week telemetry-based F-SKU sizing has saved Fortune 500 clients $100-500K/year. Slalom's sizing is competent but less data-driven on average.
• Compliance specialization. Healthcare HIPAA + government FedRAMP + DoD CMMC depth.
• Author credibility. Errin O'Connor's Microsoft Power BI Dashboards Step by Step (Microsoft Press) makes EPC the sole Fabric partner with a Microsoft Press dashboards book in print.
• Snowflake-to-Fabric migration depth. 12+ shipped migrations vs Slalom's 8+, with reference TCO numbers ($800K-$2M annual savings on real engagements).
• Senior-led. Errin and senior architects on every Fabric engagement.

Where Slalom wins

• Change management bench. Slalom's heritage in management consulting gives them stronger change management depth than most Microsoft technical partners.
• dbt practice. Slalom has a mature dbt practice that translates well to dbt-fabric.
• Mid-market presence. Slalom regional offices serve mid-market more easily than EPC Group's centralized model.
• Brand recognition with PE-backed firms. Private equity portfolio companies often default to Slalom for Microsoft data work.

The 8 decision criteria

1. Engagement size: $200K-$1.5M → either. Above $2M → either, but Slalom may price slightly more competitively. Below $200K → EPC Group typically more cost-efficient.
2. Compliance bar: HIPAA + FedRAMP + CMMC → EPC Group. SOC 2 only → either.
3. Snowflake-to-Fabric migration: EPC Group's 12+ shipped migrations have produced reproducible playbooks; Slalom's are competent but less documented.
4. Change management complexity: 5,000+ stakeholders, multi-region rollout → Slalom. <1,500 stakeholders, single-org → either.
5. dbt heritage: Existing dbt-snowflake codebase → Slalom's dbt practice translates faster. No dbt → either.
6. Senior architect engagement: Want named senior architect on every meeting → EPC Group's pattern.
7. Pricing certainty: Fixed-fee preferred → EPC Group. Hybrid acceptable → either.
8. Microsoft pre-release access: Both Microsoft Solutions Partners with Data & AI designation; access is comparable.

Sample engagement comparison

For a hypothetical Snowflake-to-Microsoft-Fabric migration at a 5,000-employee SaaS firm:

Frequently Asked Questions

Is Slalom better at Microsoft Fabric than EPC Group?

Capability is comparable; specialization differs. EPC Group has more Snowflake-to-Fabric migrations and deeper compliance work. Slalom has stronger change management and broader regional presence.

Can we use both firms?

Rarely necessary for Fabric. Pick one.

Pricing — which is cheaper?

For typical Fortune 500 Fabric implementations, EPC Group's fixed-fee proposals run 15-25% lower than Slalom's hybrid model. For very large engagements (>$2M), Slalom may price more aggressively.

Reference clients?

Both have Fortune 500 + mid-market references. Reference calls during procurement.

Which firm is better for Power BI training?

EPC Group has a structured Power BI training curriculum tied to Microsoft Press author content. Slalom's training is competent but less curriculum-formalized.

dbt-fabric — who has more experience?

Slalom has the deeper dbt practice. EPC Group has working dbt-fabric implementations but doesn't lead with it as a practice.

Capacity sizing — what's the methodology difference?

EPC Group's pattern: 4-week telemetry baseline → 80% peak right-sizing. Slalom's pattern: 2-week analysis + Microsoft FastTrack guidance. Both work; EPC Group's tends to right-size lower.

Microsoft Fabric Real-Time Intelligence?

Both firms have Eventhouse / KQL implementations. Comparable depth.

Senior architect on every meeting?

EPC Group default: yes. Slalom default: senior on critical meetings, manager-led day-to-day.

What's the most underrated Slalom advantage?

Change management. For Fabric implementations involving 1,000+ end users with a major BI platform shift, Slalom's change management bench delivers measurably better adoption.

Considering EPC Group or Slalom for Microsoft Fabric? Schedule a Fabric implementation assessment or explore Microsoft Fabric services.