ICP Definition: The 4-Layer Framework That Gets Your Outbound Working in 2026

The static attributes of the company.

The mistake: being too broad. "B2B SaaS, 10-1000 employees" includes 50,000 companies. Your outbound cannot personalise at that scale.

• Industry: Specific verticals (not "B2B SaaS" - "B2B SaaS, 50-200 employees, US/UK, Series A-C")
• Size: Employee count (50-200), revenue ($5M-$50M), or both
• Geography: US, UK, EU, or specific
• Stage: Startup, growth, mature
• Funding: Bootstrapped, Series A-C, PE-backed

The technology stack of the company.

Example: "B2B SaaS, 50-200 employees, US/UK, using HubSpot Marketing Hub Pro or higher, NOT currently using Clay or Apollo for enrichment."

The technographic layer is the highest-intent filter. If they use a competitor, hard to convert. If they use a complementary tool, easy to convert.

• Current tools: What CRM, marketing automation, sales tools, data tools they use
• Recent changes: New tool adopted, tool replaced, integration added
• Tool maturity: Are they on a basic plan or enterprise?

The events that indicate the company is in-market now.

Signal-based outreach converts 3-5x higher than generic. The signal is the personalisation. The signal is the timing.

• Funding event: Just raised Series A (60-180 days ago is peak)
• Leadership change: New VP of Sales, CRO, Head of Ops
• Hiring surge: 3+ sales or ops roles posted in 30 days
• Expansion: New office, new region, new vertical
• Negative signal: Layoffs, missed earnings, customer complaints
• Tech adoption: New CRM, new tool, new integration

The specific humans at the company who will buy.

The person layer is where most teams stop. They define a role and call it an ICP. But the role is only 25% of the person filter.

• Role: VP of Sales, Head of RevOps, Director of CX, CTO, CFO
• Seniority: IC, manager, director, VP, C-suite
• Tenure: In role for 6+ months (not a fresh hire)
• Background: Previously at a similar company, previous founder, etc.
• Engagement: Has engaged with your content, attended your webinar, etc.

A 50 to 200-person B2B SaaS in the US or UK that:

And the buyer:

That is a falsifiable ICP. You can build a list against it. You can personalise against it. You can measure conversion against it.

• Uses HubSpot Marketing Hub Pro or higher
• Has 3+ open sales or ops roles on LinkedIn
• Recently raised Series A or B (last 6 months) OR
• Recently hired a new VP of Sales or Head of RevOps
• VP of Sales, Head of RevOps, or Director of Sales Ops
• In role 6+ months
• Previously scaled a similar team
• Has engaged with content on outbound, AI workflow, or sales ops topics in the last 30 days

• Too broad. "B2B SaaS" or "mid-market" is not specific enough.
• Only firmographic. No technographic, no signal, no person filter.
• No falsifiability. If you cannot say "this company is not in my ICP because X," the ICP is too soft.

Pull your last 20 closed-won and last 20 closed-lost deals. For each, score against your proposed ICP layers.

If 80%+ of closed-won deals match and 80%+ of closed-lost do not, the ICP is validated.

If not, refine. The pattern in your closed-won deals is the actual ICP. The pattern in your closed-lost deals is what you should be filtering out.

• Week 1: Pull closed-won and closed-lost data. Identify common patterns.
• Week 2: Define all 4 layers. Write the ICP on one page.
• Week 3: Build a list against the ICP using Clay, Apollo, or LinkedIn Sales Navigator.
• Week 4: Test outbound against the ICP. Measure reply and meeting rate. Refine.