Brand Equity Models: Aaker vs Keller for B2B Firms
No one ever chooses a 120-person accountancy firm.
It is chosen by a finance director, a procurement lead, someone from legal, and the operations manager, who said nothing in the second meeting and then raised the objection that killed the deal.
According to research by Google and Bain & Company published on Think with Google, the average B2B buying committee has 17 cross-functional stakeholders.
The same research found that 92% of B2B buyers already have a shortlist of preferred vendors before the buying process begins.
The most-cited brand equity models were designed to describe what happens inside one customer’s head.
If you are preparing a rebrand ahead of an acquisition or a growth push, that mismatch decides whether the money ever shows up in the pipeline.
What follows covers the four models you will meet (Aaker, Keller, BAV and BrandZ), what each one measures, and a three-layer version that fits how professional services are actually bought.
If you want the foundations first, start with what brand equity is and why it carries a price.
Choosing a model is one step in a wider brand audit and diagnostic process.
- Aaker and Keller are foundational but built for single customers; B2B buying involves large cross-functional committees and hidden buyers.
- Use Aaker to audit assets and liabilities including proprietary credentials that buyers check.
- Use Keller to design role-specific meaning, mapping performance and imagery for each stakeholder in the buying group.
- Add an evidence layer: track shortlist inclusion, stalled deals, sales velocity and fee realisation from CRM data to judge revenue impact.
What Are Brand Equity Models?
Brand equity models are frameworks for identifying, measuring and managing the value a brand name adds beyond the product or service itself.
The two most cited are David Aaker’s five-asset model (1991) and Kevin Lane Keller’s Customer-Based Brand Equity pyramid (1993). Others, including BAV and BrandZ, are proprietary measurement systems.
- Aaker’s model treats brand equity as a register of assets and liabilities that a firm can manage.
- Keller’s model treats brand equity as knowledge in the customer’s mind, built in sequence from awareness to resonance.
- Commercial models such as Young & Rubicam’s BAV and Kantar’s BrandZ benchmark brands against each other using large survey panels.
Brand equity models are frameworks, chiefly Aaker’s five-asset model and Keller’s CBBE pyramid, that explain how a brand’s name adds value beyond the product or service itself.
Aaker’s Model: The Asset Register
David Aaker, Professor Emeritus of Marketing at UC Berkeley’s Haas School of Business, set out his model in Managing Brand Equity (The Free Press, 1991).
Aaker’s model defines brand equity as a set of assets and liabilities linked to a brand’s name and symbol that add to, or subtract from, the value of what a firm sells. The model has five categories:
- Brand loyalty
- Brand awareness
- Perceived quality
- Brand associations
- Other proprietary brand assets (trademarks, patents, channel relationships)
Most summaries drop the word liabilities. Aaker’s model allows a brand to destroy value as well as create it.
That is the honest starting point for a firm whose name now carries a merger hangover or a specialism the market has moved past, which is what brand decay looks like on a pitch shortlist.
For professional services, Aaker’s fifth category is the most useful and the most ignored.
For a law firm, “other proprietary assets” means panel appointments, Lexcel accreditation and Legal 500 rankings, which are the things a general counsel checks before agreeing to a call.
Aaker later turned the categories into measurable indicators with the Brand Equity Ten, published in California Management Review in 1996.
Aaker’s model is an inventory, and an inventory can be audited. That is why it underpins most B2B brand audit checklists.
What Aaker’s model cannot tell you is which member of the buying group holds which association, or whether any of those associations changed a decision.
Keller’s CBBE Model: The Meaning Pyramid
Kevin Lane Keller, Professor of Marketing at Dartmouth’s Tuck School of Business, introduced Customer-Based Brand Equity (CBBE) in the Journal of Marketing in 1993.
Keller’s model defines brand equity as the differential effect of brand knowledge on customer responses to marketing. Keller’s pyramid builds that knowledge in four levels:
- Identity: Who are you? (salience)
- Meaning: What are you? (performance and imagery)
- Response: What do I think of you? (judgements and feelings)
- Resonance: What is our relationship?
Competitors tend to skip the fact that Keller’s pyramid has two sides. Performance and judgments form the rational route. Imagery and feelings form the emotional route. Both routes meet at resonance.
That split matters in a professional services sale, and it lines up with how Edelman and LinkedIn describe hidden buyers.
The people championing a firm tend to win on imagery and feelings.
Finance, procurement and legal, the functions the 2025 Invisible Influence report names, are the ones who have to justify the choice afterwards, so they lean on performance and judgments.
Treat this as a working diagnosis rather than a law. In practice, the question to ask is which side of the pyramid each blocker was standing on.
Keller’s limitation comes from Keller’s own definition: the unit of analysis is one customer. Resonance at the apex describes a relationship with an individual, while a single sceptic in procurement can veto the decision.
Resonance is still the right goal after signature, which is where brand loyalty earns its keep.
BAV and BrandZ: The Benchmarking Models
You will see two more names in every comparison. Brand Asset Valuator (BAV), from the agency Young & Rubicam, scores differentiation, relevance, esteem and knowledge.
BrandZ, from Millward Brown (now part of Kantar), runs brands through presence, relevance, performance, advantage and bonding.
Both are survey panels, and a 90-person consultancy will not be in either. Keep one question from BAV: Is your firm both different and relevant to this buyer?
Most professional services brands manage one of the two. Rarely both.
- Brand Asset Valuator (BAV) was developed by the agency Young & Rubicam. It scores differentiation, relevance, esteem and knowledge. Differentiation and relevance combine to form brand strength (sometimes called vitality), and esteem and knowledge combine to form brand stature.
- BrandZ was created by Millward Brown, now part of Kantar. It places brands on a five-stage pyramid: presence, relevance, performance, advantage and bonding.
A 90-person consultancy will not appear in either panel.
BAV and BrandZ give you useful vocabulary, but they only work as instruments if you pay for the research. Borrow BAV’s differentiation-plus-relevance test and leave the rest.
Why Aaker and Keller Break Down in B2B Buying
Start with the case for them, because it is a good one. Aaker and Keller have survived three decades of academics trying to replace them.
A board can argue about “perceived quality” or “brand salience” and at least be arguing about the same thing. A CEO using either model is ahead of one using neither, which is a low bar but a real one.
The weakness is the unit of analysis. Both models locate brand equity in “the customer”. In professional services, the customer is a group, and the group keeps getting bigger.
The buying group has become a buying network.
Forrester Research’s 2025 Buyers’ Journey Survey, reported in 2026, found that 73% of B2B purchases involve three or more internal departments.
Forrester found that the average purchase decision involves 13 people inside the buying organisation and nine external participants: peers, analysts, communities, outside experts and AI tools.
Forrester’s 2026 State of Business Buying briefing notes that buying groups are growing, procurement is gaining influence, and trials are becoming more important for reducing perceived risk.
The Google/Bain figure of 17 and Forrester’s 13-plus-nine come from different studies with different definitions. Both land in double figures. No pyramid built for one mind describes a decision shared by that many people.
Hidden buyers decide without having to climb the pyramid.
The 2025 Edelman–LinkedIn B2B Thought Leadership Impact Report, Invisible Influence: Unlocking the Power of Hidden Buyers, names the stakeholders that Aaker and Keller never modelled.
Edelman and LinkedIn define hidden buyers as people in finance, procurement, legal, compliance, operations and HR.
Hidden buyers rarely use the service, attend the pitch or sign the agreement, but they can still influence or veto the choice.
The research surveyed 1,934 US business decision-makers via LinkedIn in March and April 2025. More than 40% of B2B deals stall due to internal misalignment, often linked to overlooked stakeholders.
A procurement lead does not ask whether they feel a connection with your firm. A procurement lead asks whether the choice can be defended if it goes wrong. That question has no rung on Keller’s pyramid.
“B2B brand equity is the confidence a buying group can assemble around a choice. Each stakeholder needs a different piece of evidence. The partner needs to recognise peers; finance needs proof of value; procurement needs proof of safety; and legal needs proof of control. A brand that supplies only one of those pieces gets shortlisted and then stalls.”
Two objections worth answering
“Our clients are owner-managed businesses, not committees of 17.”
That is a fair point. If one owner genuinely signs alone, Keller’s pyramid works as written.
Even so, a 40-person client still has a finance lead who checks fees and an accountant who gets asked, “Who are these people?”
The headcount shrinks, but the hidden buyer is still there.
“This is a sales problem, not a brand problem.”
The 92% shortlist figure answers that. Shortlists form before a salesperson gets a meeting, so the evidence that puts you on one is brand-owned.
In the 2024 Edelman–LinkedIn B2B Thought Leadership Impact Report, 73% of decision-makers said an organisation’s thought leadership was a more trustworthy basis for assessing its capabilities than its marketing materials and product sheets.
That evidence is published under your name long before anyone calls.
The B2B Model: Assets, Meaning, Evidence
A workable B2B brand equity model uses three layers.
Aaker covers the assets you must manage. Keller covers the meaning you must create.
A third operating layer, evidence, proves whether either one is changing revenue.
Layer 1: Assets (Aaker). Audit all five categories, including liabilities, and assign a named owner to each asset. A panel appointment that nobody tracks lapses quietly, and nobody notices until the tender goes to a competitor.
Layer 2: Meaning (Keller), mapped by role. Run the pyramid once for each role in the buying group. A managing partner may need to believe your firm “gets firms like ours”. The same client’s finance director needs to believe your fees are defensible against two cheaper quotes. If your website, credentials deck and pitch only answer the first, the second person stalls the deal, politely, by email.
Layer 3: Evidence, the missing layer. Treat brand equity as a confidence system and check whether that confidence changes outcomes:
| Commercial outcome | What it reveals about equity | Evidence to track |
| Shortlist inclusion | Mental availability before the RFP | Tender invitations, unsolicited inbound, share of search against named rivals |
| Buying-group consensus | Whether every role found its evidence | Stalled deals, the stage they stall at, which stakeholder raised the blocker |
| Sales velocity | Perceived risk | Days from the first meeting to the signed engagement |
| Pricing power | Whether the brand supports a premium | Fee realisation, discounts requested at the procurement stage |
| Delivery proof | Whether the promise survives the contract | Satisfaction by client role, scope disputes |
| Retention and referral | Resonance, Keller’s apex | Renewal rate, referred to as introductions per year |
None of these measures needs a BrandZ panel.
Most of the data already sits in your CRM and practice-management system, scattered across three people’s spreadsheets.
Put it side by side on a brand health dashboard, review it each quarter, and when a deal stalls, record which stakeholder stalled it.
Within a year, you will know which layer of your brand is failing, and so will your rebrand brief.
Use Aaker to Audit, Keller to Design, Revenue to Judge
Asking whether to use Aaker or Keller is the wrong argument for a B2B firm. Aaker gives you the register of assets that a buying group checks.
Keller explains how those assets become meaningful and why the partner and the finance director climb different sides of the same pyramid.
Neither model, used alone, tells you whether your reputation is getting you shortlisted, bringing hidden buyers onside or protecting your fees.
That proof belongs to the evidence layer, and most firms already hold the data without using it.
Before you brief a rebrand, find out which layer is failing.
A free Brand Equity Audit™ from Inkbot Design maps your assets, meaning and commercial evidence, and shows exactly where the brand is losing ground and what to fix first.
FAQs
What is the difference between Aaker’s and Keller’s brand equity models?
Aaker’s model treats brand equity as five categories of assets and liabilities a firm can manage: loyalty, awareness, perceived quality, associations and proprietary assets. Keller’s CBBE model treats brand equity as customer knowledge built in four stages, from identity through meaning and response to resonance. Aaker inventories assets, while Keller sequences how they become meaningful.
Which brand equity model is best for a B2B firm?
No single model is best for a B2B firm. Aaker’s model suits auditing the assets a buying group checks, and Keller’s model suits designing what each stakeholder should believe. B2B firms also need an evidence layer that tracks shortlisting, deal stalls, sales cycle length, fee realisation and retention to prove brand equity is changing revenue.
Can a mid-sized professional services firm measure brand equity without commissioning a survey?
Yes. A mid-sized professional services firm can track brand equity through commercial evidence it already holds: tender invitations, unsolicited enquiries, share of search, stalled-deal reasons, days to signature, discount requests and renewal rates. Survey panels such as BAV and BrandZ rarely include firms of 50–200 people, so first-party data is usually the more accurate measure.
Is brand equity the same as brand value?
No. Brand equity refers to the strength of perceptions and associations that lead buyers to prefer a brand. Brand value is a financial estimate of what the brand is worth as an asset, typically used in valuations, acquisitions and balance-sheet reporting. Strong brand equity drives brand value, but the two are measured differently.
How often should a B2B firm review its brand equity?
A B2B firm should run a full brand equity audit annually, or before any rebrand, merger or repositioning. Evidence-layer metrics such as shortlist rate, deal stalls and fee realisation are better reviewed quarterly, because they move faster than perception and give early warning of brand decay.
