Chief Outsiders vs Authentic Brand vs Kalungi: 11 Best Fractional CMOs 2026

Best for Marketing leadership gap

Chief Outsiders (#1, 9.3/9.4). The top choice for proven, enterprise-level marketing leadership due to its deep bench of vetted Fortune 500 CMOs. It also handles Scaling marketing team.

Best for No marketing strategy

Authentic Brand (#2, 9.1/9.4). A top pick for its structured methodology and focus on building sustainable, in-house marketing teams. It also handles Stalled growth.

Best for Go-to-market strategy

Kalungi (#3, 8.9/9.4). The undisputed leader for B2B SaaS startups, offering a complete, specialized marketing playbook. It also handles Scaling marketing team.

What is a Fractional CMO?

A Fractional Chief Marketing Officer (CMO) is an experienced, senior-level marketing executive who works with a business on a part-time or contract basis. They provide strategic guidance, lead marketing teams, and oversee marketing execution without the cost and commitment of a full-time executive hire.

When does a Fractional CMO make sense?

Companies typically hire a Fractional CMO when they need high-level marketing strategy and leadership but are not yet ready for a full-time C-suite executive. This is common in startups and scale-ups that have outgrown their initial marketing tactics and need a cohesive strategy to scale.

How to choose

1. 1Assess your company's stage and specific marketing challenges. Are you building a strategy from scratch or scaling an existing one?
2. 2Evaluate a provider's track record in your specific industry (e.g., B2B SaaS, e-commerce). Niche expertise is critical.
3. 3Interview the specific CMO you would be working with, not just the firm's sales representative. Personal chemistry and leadership style fit are paramount.
4. 4Clarify the expected deliverables, meeting cadence, and reporting structure upfront to ensure alignment on goals and communication.

What does a Fractional CMO do?

A Fractional CMO is responsible for developing marketing strategy, building and leading the marketing team, managing the marketing budget, overseeing brand positioning, and implementing systems for measuring ROI. They act as the senior marketing leader on the executive team.

How much does a Fractional CMO cost?

Costs vary widely based on experience and engagement level, typically ranging from $5,000 to $20,000+ per month. Engagements are usually structured as monthly retainers for a set number of hours or days per week.

When should a company hire a Fractional CMO?

A company should consider a Fractional CMO when the CEO is spending too much time on marketing, growth has plateaued, the current marketing team needs senior leadership, or they are preparing for a major growth phase like a new product launch or market expansion.

What's the difference between a Fractional CMO and a marketing agency?

A Fractional CMO is a single strategic leader who becomes part of your executive team, focusing on strategy, team leadership, and accountability. A marketing agency is an external team of specialists that executes specific tasks like SEO, content creation, or paid ads. A Fractional CMO often manages marketing agencies.