Where synthetic data fits into customer research

Validate AI-generated insights, establish governance, and prioritize real-world research where it delivers the greatest value.

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    Marketing has always depended on customer insight, but traditional ways of gaining it are under strain. Surveys take time. Focus groups are expensive. Hard-to-reach audiences often remain underrepresented. Privacy requirements and consent limitations make granular customer data harder to access and use. At the same time, marketing teams are under pressure to move faster, personalize more effectively, and support more decisions with evidence.

    This pressure is shifting the focus from collecting more customer data to generating more useful customer insight. Synthetic data offers one way to make that shift. By using AI to create statistically representative data that mirrors the properties of real-world datasets, marketers can simulate audience responses, test ideas, and explore decisions before committing budget, creative resources, or product investment.

    Marketing decisions often need to move faster than traditional research supports. A campaign message may need refinement before launch. A product concept may require early market feedback before development resources are committed. A customer journey redesign may need testing across multiple scenarios, segments, and markets before teams identify the most promising approach.

    Synthetic data gives marketers a way to explore these questions earlier and more often. For example, synthetic focus groups can simulate feedback from specific consumer or B2B audiences that are difficult to recruit in real life. Virtual personas and digital twins can help teams pressure-test messaging, surface potential objections, and compare audience reactions across different value propositions.

    The practical benefit isn’t just speed. It’s flexibility. Traditional research often forces marketers to narrow the number of concepts, messages, or scenarios they test because each additional variation adds cost and time. Synthetic data makes broader experimentation more feasible, allowing teams to compare more creative directions, explore more market conditions, and identify stronger hypotheses before validating them with real customers.

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    The best use cases start where data is scarce

    Marketing leaders should resist the temptation to apply synthetic data everywhere at once. The strongest starting point is a focused pilot tied to a decision where the organization needs more insight, but the risk of being wrong is manageable. Content development and message testing are often good entry points because teams can use synthetic audiences to compare alternatives before moving into production or field testing.

    A pilot might begin with a product launch team testing several positioning options against synthetic versions of target segments. The team can use existing first-party research, voice-of-the-customer data, CRM signals, website analytics, and carefully selected third-party sources to generate a synthetic audience. The team can then use that audience to identify likely objections, compare message clarity, and flag potential audience mismatches.

    Product and experience teams can also benefit from synthetic data when testing early concepts. Before investing heavily in development, teams can simulate how different audiences might respond to a new feature, interface, or customer journey. That helps identify friction points earlier, prioritize user needs, and improve the quality of real-world research by making it more targeted.

    Synthetic data should inform decisions, not make them

    The key is to position synthetic data as an accelerant, not an authority. It helps teams decide what to test, where to look, and which ideas deserve more investment. It shouldn’t be the only basis for major brand, product, pricing, or customer experience decisions. The goal is to improve the quality and speed of decision-making, not remove human judgment from the process.

    That distinction matters because synthetic data is only as useful as the inputs, models, and assumptions behind it. If source data is incomplete or biased, synthetic outputs may reflect those same limitations. If prompts or models overrepresent dominant audiences, they may flatten important cultural differences or miss edge cases. If simulated audiences are treated as truth, teams may become overconfident in findings that still require real-world validation.

    Human oversight should be built into every synthetic data pilot. Marketing teams need validation steps that compare synthetic findings with observed behavior, traditional research, and subject-matter expertise. Used well, synthetic data makes human insight more valuable by helping teams ask sharper questions and focus limited research resources where they matter most.

    Governance will determine whether synthetic data builds trust

    The biggest barrier to synthetic data adoption may not be technical. It may be trust. Stakeholders are likely to question whether simulated customers can provide meaningful insight, especially when decisions affect brand reputation, customer experience, product strategy, or revenue. Marketing leaders need to explain where synthetic data is appropriate, how it’s generated, and how outputs are validated.

    That requires clear governance from the start. Teams should define which use cases are acceptable, what data sources can be used, how synthetic outputs are tested against real-world evidence, and when human review is required. They should also document the assumptions behind synthetic audiences so results aren’t treated as objective truth.

    Vendor evaluation also matters. Synthetic data providers use different methods, and many approaches remain opaque or fast-evolving. Marketing leaders should ask how synthetic audiences are built, what source data is used, how bias is detected, how outputs are validated, and whether the resulting data can be audited. They should also be cautious about adopting tools that create future lock-in or add complexity to an already fragmented marketing technology environment.

    Making synthetic data a lasting capability

    Organizations that succeed with synthetic data treat it as a disciplined capability rather than a novelty. They start with practical pilots, validate synthetic outputs against real-world evidence, and educate stakeholders on when synthetic data should and shouldn’t be used. Over time, they build new muscle around data generation, not just data collection.

    Synthetic data can make insight faster, experimentation broader, and decision-making more adaptive. But its real promise isn’t that marketers will stop listening to customers. It’s that they’ll ask better questions, test more possibilities, and use scarce real-world customer input where it matters most.


    Contributing authors are invited to create content for MarTech and are chosen for their expertise and contribution to the martech community. Our contributors work under the oversight of the editorial staff and contributions are checked for quality and relevance to our readers. MarTech is owned by Semrush. Contributor was not asked to make any direct or indirect mentions of Semrush. The opinions they express are their own.

    Lizzy Foo Kune
    Distinguished VP Analyst, Gartner

    Lizzy Foo Kune serves as a Distinguished VP Analyst and co-leads the Gartner Futures Lab. She specializes in guiding organizations to develop and optimize customer data and technology strategies. Her research encompasses customer data management, with a particular emphasis on customer data platforms (CDPs), marketing data and analytics, and the integration of emerging technologies to enhance customer insights.

    In her role, Lizzy is committed to advancing AI literacy among Chief Marketing Officers (CMOs) and their teams. She equips marketing leaders with the knowledge and frameworks necessary to navigate the rapidly evolving AI landscape, ensuring they can effectively assess, implement, and manage AI-driven solutions within their organizations. Lizzy’s thought leadership includes coverage of AI agents in marketing, examining their transformative impact on campaign automation, customer interaction, and personalization at scale.

    Lizzy manages Gartner’s Maverick Insights program and spearheads the Future of the Customer initiative. Through her expertise, she enables organizations to leverage data-driven and AI-powered approaches for improved customer engagement, operational efficiency, and strategic decision-making.

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