October 2026

Overview

Peeriosity hosted a GBS Peercast titled “Comparing Options: Big Firms, Small Firms, Vendors, or Internal Resources.” Discussion and live polls covered four segments: the sourcing landscape, where each partner model excels, hidden risks of a one-size-fits-all approach, and building a hybrid partner ecosystem.

Note that this document is a summary. Peeriosity-100 members have full visibility to company names, presenters, Peercast attendees, and a recording of the Peercast discussion.

Key Themes

1. Technology vendors are the most-used partner type. 80% of respondents work with technology vendors or their implementation partners, versus 60% with global consultancies and 40% with niche firms. Participants valued desk-level product knowledge (Concur, Coupa) over a large firm’s claimed expertise, and noted tools now change too fast to build that depth in-house.
2. Maturity increases reliance on partners. 60% said GBS maturity has increased their use of external partners; 20% said it decreased somewhat. As GBS adds services and ERP modules, it brings in more specialists “like spokes on a wheel.”
3. Big firms earn their premium on scale. Enterprise-wide transformation or operating model design (67%), multi-region rollouts (50%) and large technology programs (50%) were where global consultancies proved worth the cost. None chose them for functional process improvement or change management. 67% said small versus big firm performance is mixed and project-dependent.
4. Internal teams keep control of the program. 100% said the internal PMO or transformation office integrates multi-partner programs. Partner and vendor management (67%) is the capability most often kept in-house, followed by process excellence, PMO and data and analytics (50% each).
5. Change management is the recognized weak spot. Only 17% deliberately keep change management in-house. It is often funded only as part of an implementation, treated as a one-off, and hard to justify with hard numbers after go-live.
6. Team turnover is the top single-partner risk. Inconsistent team quality or turnover was the most-cited risk (50%), ahead of lock-in and limited knowledge transfer (25% each). 75% said a partner choice has occasionally proven a poor fit.
7. AI is starting to shift work in-house. Half of respondents said AI is leading them to do more in-house; the other half said it is too early to tell. No one is relying more on external specialists because of AI.

Notable Takeaways

• Getting it right outweighs a 10 to 20% premium. One participant noted that a failing solution costs more in pain than a higher fee; price only becomes decisive at 50% to 100% more.
• “Nobody gets fired for hiring a big firm” is real but unspoken. Participants agreed career safety sits in the back of decision-makers’ minds, though it never appears on the pros and cons list. No poll respondent selected it as a criterion.
• Size brings stability. Another participant cautioned that a niche firm dependent on one key client is a continuity risk on long or critical initiatives, and a large project may exceed a small firm’s bench.
• Expertise drives selection. Specialized expertise (100%), cost (75%) and complexity and scale (50%) were the top criteria; need for internal ownership afterward drew no votes.
• Commercial models are split. Fixed fee, outcome-based and “varies by partner” drew 25% each; no one uses time and materials most often. Outcome-based terms can be subjective, since client and partner may judge the outcome differently.
• Value is measured by results. KPIs tied to business outcomes and budget and timeline adherence (75% each) lead; no respondent runs a formal post-engagement review.
• Knowledge transfer relies on pairing and playbooks. 75% each pair internal staff with partner resources, require documentation and playbooks, and run train-the-trainer sessions; 50% write transfer requirements into the SOW.

Audience Q&A Highlights

• Vendor teams versus consultancies: The choice is about expertise, not cost. Vendor specialists know what the tool can and cannot do, including policies, expense types and configuration.
• Internal versus external implementation lead: A pure technical build can be vendor- or consultant-led; projects heavy on internal alignment and process change lean on internal resources.
• Why so few keep change management in-house: One participant sees it treated as a one-off for specialized transitions. Another said it is funded only within implementations and ends with an FAQ and a corporate email. A third described it as embedded in transformation delivery through training. A fourth countered that onboarding and new business units make it continuous.
• Making knowledge transfer stick: Projects start with blueprinting, then use train-the-trainer sessions, a documentation repository, and a hypercare or stabilization phase that refreshes users who have not used the system since training.
• Integrating multiple partners: It depends on who hired whom. If the consultancy brings in vendor resources, it leads; if the company engages partners directly, it must coordinate them.
• Leaders pushing a preferred firm: Pressure is rarely explicit, but preferences are known, often tied to a leader’s former consultancy, and those connections can help with escalation. One participant advised documenting requirements clearly in the RFP to create a record of how the decision was made.