How to do audience targeting without third-party cookies?

The Short Version

Third-party cookies are dying—and they're already dead in Safari, Firefox, and Chrome's upcoming phases. The good news: you don't need them. The best-performing marketers are shifting to first-party data strategies that actually build stronger customer relationships and often deliver better ROI than cookie-based targeting ever did.

Why Third-Party Cookies Are Becoming Obsolete

Google is phasing out third-party cookies in Chrome by Q1 2025 (delayed but inevitable). Apple killed them in Safari years ago. Regulators (GDPR, CCPA, DMA) are tightening rules. And frankly, first-party data converts better because it's based on actual customer behavior you control, not inferred cross-site tracking.

Core Strategies for Cookie-Free Targeting

1. Build Your First-Party Data Foundation

This is the cornerstone. First-party data is information customers willingly give you:

• Email lists and CRM data — Your most valuable asset. Segment by purchase history, engagement level, industry, company size, or behavior
• Website behavioral data — What pages do visitors spend time on? What do they download? What products do they view? Track this with your own analytics (Google Analytics 4, Mixpanel, Amplitude)
• Customer surveys and preference centers — Ask directly. "What topics interest you?" "What's your role?" This data is gold
• Transactional data — Purchase history, cart abandonment, product usage, renewal dates
• Engagement signals — Email opens, clicks, webinar attendance, content downloads

Store all of this in a CDP (Customer Data Platform) like Segment, mParticle, or Treasure Data. A CDP unifies data from all sources and creates actionable audience segments.

2. Contextual Targeting (The Underrated Approach)

Instead of tracking *who* the person is across the web, target based on *what they're reading right now*.

• Content-based targeting — Show ads about accounting software on accounting blogs. Show ads about cybersecurity on security publications. This works because intent is high
• Keyword-based targeting — Google Ads, LinkedIn, and programmatic platforms still allow keyword targeting without cookies
• Topic-based targeting — Platforms like Google Ads and LinkedIn let you target by topic (e.g., "Cloud Computing," "Marketing Technology") without knowing individual users
• Publisher partnerships — Work directly with industry publications and newsletters your audience reads. They know their readers better than any cookie ever will

Contextual targeting often outperforms cookie-based targeting because you're reaching people at the moment they're interested in your category.

3. AI-Powered Audience Modeling (Lookalike Audiences 2.0)

AI can now identify patterns in your customer base and find similar people without cross-site tracking:

• Lookalike audiences — Upload your best customers (high-value, long-term, repeat buyers) to Google Ads, Meta, or LinkedIn. Their AI finds similar people in their network
• Predictive scoring — Tools like 6sense, Demandbase, and ZoomInfo use AI to identify accounts and individuals most likely to buy, based on firmographic and behavioral signals
• Custom intent signals — Platforms like 6sense and Bombora track what companies are researching (without cookies) by analyzing search behavior, content consumption, and intent data they collect directly
• AI-driven segmentation — Tools like Klaviyo and HubSpot use AI to automatically segment your audience based on patterns in your first-party data

4. Direct Relationships and Community Building

The strongest targeting is no targeting at all—it's having an audience that *wants* to hear from you:

• Email marketing — Build a quality list. Segment ruthlessly. Email is the highest-ROI channel and requires zero cookies
• Owned channels — Your website, blog, newsletter, podcast, community forum. These are yours forever
• Social media organic — Build followers who actually want to see your content
• Partnerships and sponsorships — Reach audiences through trusted sources (industry events, podcasts, newsletters, associations)
• Account-based marketing (ABM) — For B2B, identify target accounts and reach decision-makers directly through LinkedIn, email, and direct outreach

5. Privacy-Compliant Advertising Platforms

These platforms are built for a cookie-free world:

• Google Ads — Still powerful. Use search intent, keywords, and first-party audience lists
• LinkedIn — Excellent for B2B. Target by job title, company, industry, skills. No cookies needed
• Meta (Facebook/Instagram) — Requires first-party data uploads or lookalike audiences based on your customers
• TikTok — Interest-based and contextual targeting
• Programmatic platforms — Contextual and first-party data-based buying is growing (The Trade Desk, Magnite)

The Practical Implementation Roadmap

Month 1: Audit and Foundation

1. Audit your current data sources — What first-party data do you already have?
2. Implement Google Analytics 4 (GA4) — Tracks user behavior on your site without third-party cookies
3. Set up a CDP or data warehouse — Centralize your customer data
4. Create a data governance policy — Who owns what data? How is it used?

Month 2-3: Build Audiences

1. Segment your email list by behavior, demographics, and purchase history
2. Create lookalike audiences in Google Ads and Meta based on your best customers
3. Identify your top 20 target accounts (if B2B) and create ABM campaigns
4. Launch contextual campaigns on industry publications

Month 4+: Optimize and Scale

1. Test AI-powered tools (6sense, Demandbase, predictive scoring)
2. Double down on what works — Email, owned channels, direct relationships
3. Build partnerships with publishers and platforms your audience trusts
4. Continuously refine segments based on performance data

Tools to Consider

Data Collection & Unification:

• Google Analytics 4 (free)
• Segment, mParticle, Treasure Data (CDPs)
• HubSpot, Salesforce (CRM + first-party data)

Audience Targeting:

• Google Ads (search, display, YouTube)
• LinkedIn Ads
• Meta Ads Manager
• 6sense, Demandbase, ZoomInfo (B2B intent)

Email & Owned Channels:

• Klaviyo, Mailchimp, HubSpot (email marketing)
• Substack, Ghost (newsletters)
• Slack, Discord (community)

Analytics & Insights:

• Mixpanel, Amplitude (product analytics)
• Looker, Tableau (data visualization)
• ChatGPT, Claude (AI-powered market research)

Bottom Line

The shift away from third-party cookies is forcing marketers to build stronger foundations: first-party data, direct customer relationships, and contextual relevance. The best-performing teams are combining owned data with AI-powered lookalike audiences, contextual targeting, and direct partnerships. This approach is more sustainable, more compliant, and often more effective than cookie-based targeting ever was. Start by auditing your first-party data, implement GA4 and a CDP, and build your email list—these three moves alone will future-proof your targeting strategy.