What Is a GEO Agency?

A GEO agency is a firm that specializes in Generative Engine Optimization, the practice of structuring content and building authority signals so that AI-powered search engines (ChatGPT, Perplexity, Google AI Overviews, Gemini, and Claude) cite your brand when generating answers for users.

GEO as a discipline was formalized in a 2024 joint paper by researchers at Princeton, Georgia Tech, and IIT Delhi. The study found that specific content techniques (adding statistics, citing sources, using direct quotations) can lift a page’s visibility in AI-generated answers by up to 40%. 

A GEO agency applies those techniques at scale: auditing your content for AI-readiness, restructuring information architecture, building third-party mentions, and tracking how often your brand surfaces in AI responses.

Core services a GEO agency delivers:

• Content structure audits (answer-first format, question-based H2s, schema markup)
• Entity building (Wikipedia, Wikidata, Google Knowledge Panel, author profiles)
• Citation engineering (getting your content cited on forums, media, and third-party sites that AI engines trust)
• Schema markup implementation (FAQ, HowTo, Article, Organization)
• AI mention tracking (monitoring how often your brand appears in ChatGPT, Perplexity, Gemini answers)

GEO vs. SEO: What Is the Difference?

GEO and SEO are related but measure different outcomes. SEO earns you a blue link ranking. GEO earns you a citation inside an AI-generated answer.

Key point: GEO does not replace SEO. As of late 2025, Ahrefs data show that traditional organic search still drives approximately 345x as much total traffic as all AI engines combined. The two disciplines run in parallel. Agencies that only know GEO without SEO fluency will under-deliver.

Why GEO Matters in 2026

The numbers are specific enough to act on:

• AI search adoption doubled in six months. Daily AI search users in the US rose from 14% in early 2025 to 29.2% by late 2025
• AI-referred traffic converts better than organic. Visitors from ChatGPT convert at 14.2% to 15.9% on average, versus 1.76% for Google organic. 
• Zero-click searches are accelerating. After Google AI Overviews launched widely, zero-click searches grew from 56% to 69% of all queries in a single year. 
• Gartner projected a 25% drop in traditional search engine volume by 2026, with search marketing losing market share to AI chatbots, a prediction that has tracked closely against observed data.

For brands in Vietnam, where smartphone usage now exceeds 88% among adults and the e-commerce market reached USD 25 billion in 2024, the shift to AI-assisted search is not a future risk. It is already changing how buyers find vendors today.

What Does a GEO Agency Do?

A GEO agency gets your content into AI-generated answers by making it structurally extractable, factually authoritative, and widely cited across sources that LLMs trust.

The main services in practice:

• Content structuring: Rewriting or reformatting existing pages so the first 200 words answer the primary question directly, H2s are phrased as questions, and key facts are in named, extractable blocks.
• Entity building: Creating or strengthening your brand’s presence on Wikidata, Google Knowledge Panel, LinkedIn, Crunchbase, and trusted industry directories so AI engines can verify your organization as a real, authoritative entity.
• Schema markup: Implementing Article, FAQPage, HowTo, Organization, and BreadcrumbList schema so Google AI Overviews and other structured-answer systems can parse your content reliably.
• Citation seeding: Distributing content to authoritative third-party publications, forums (Reddit, Quora), industry blogs, and press outlets. Research from Omnibound shows that distributing content across a wide range of publications increases AI citations by up to 325% compared to publishing in a single domain.
• AI mention tracking: Using tools (e.g., Brandlight, Profound, Otterly) to monitor how often your brand appears in responses from ChatGPT, Perplexity, Gemini, and Claude and which competitors appear in your place.
• Statistics and data enrichment: Adding specific numbers, study references, and dated statistics to content. The Princeton/Georgia Tech study found adding statistics is the single most effective GEO tactic, improving AI visibility by 41%.

How Do GEO Agencies Get You Cited by AI?

AI engines pull citations through two mechanisms: parametric memory (facts baked into the model during training) and real-time retrieval (RAG: Retrieval-Augmented Generation, used by Perplexity and ChatGPT with search enabled). GEO agencies target both.

Step-by-step: how an agency engineers an AI citation

1. Audit current AI visibility. Run brand queries across ChatGPT, Perplexity, Gemini, and Claude. Map which competitors appear and why.
2. Identify content gaps. Find queries your brand should own but does not appear in. These become priority pages.
3. Restructure target pages. Apply the answer-first format, question-based headings, FAQPage schema, and concrete statistics.
4. Build entity signals. Claim and verify Google Knowledge Panel, update Wikidata, and add author E-E-A-T profiles.
5. Seed third-party citations. Place your content (as earned media, guest posts, press mentions, or forum answers) on sources AI engines already cite.
6. Track and iterate. Monitor AI mention frequency monthly. Adjust based on which pages and formats generate citations.

How to Choose a GEO Agency in Vietnam

The right GEO agency for your business meets four criteria:

• Track record with measurable AI visibility results, not just keyword rankings. Ask for case studies that show before/after AI mention frequency, not just organic traffic.
• Fluency in both SEO and GEO. An agency that only knows one discipline will miss the overlap. 93.67% of Google AI Overview citations come from pages already ranking in Google’s top 10 (Ahrefs, 2025). Your SEO foundation must be solid.
• Access to AI mention tracking tools. If an agency cannot show you how often your brand surfaces in AI answers, they cannot manage what they cannot measure.
• Understanding of the Vietnamese market. Content authority signals, local media outlets, and Vietnamese-language entity building (Wikidata in Vietnamese, local news citations) differ significantly from global GEO strategy.

Questions to ask before signing a contract:

• Which tools do you use to track AI mentions? (Brandlight, Profound, Otterly, or custom dashboards)
• Can you show a case study where you improved a client’s AI citation frequency?
• How do you handle entity building for Vietnamese brands targeting both domestic and international AI queries?
• Do you offer GEO as a standalone service or only bundled with SEO?
• What is your process for updating content as AI engine behavior changes?

Top 5 GEO Agencies in Vietnam (2026)

GEO as a named discipline is less than two years old in Vietnam. Most agencies offering GEO services today have built the capability on top of an existing SEO or content marketing foundation. The agencies below are evaluated on real-world track record, technical depth (entity building, schema, AI tracking), ability to serve both Vietnamese and international brands, and publicly available evidence of AI search work.

1. SotaMedia

Background: SotaMedia is the marketing arm of SotaTek, a Vietnam-based global IT company with 1,300+ engineers, offices in the US, Australia, Singapore, Japan, and South Korea, and 500+ projects delivered across 25 countries. SotaMedia sits inside that technology infrastructure, which gives it a structural advantage most marketing agencies in Vietnam do not have: direct access to AI/ML engineers, blockchain developers, and data architects.

Why it ranks first for GEO: GEO is fundamentally a technical discipline. Schema markup, structured data, entity graphs, and AI citation tracking require engineering capability alongside content strategy. SotaMedia operates from inside SotaTek’s technical stack, meaning its GEO work is backed by the same team that builds AI and ML products for enterprise clients globally.

Key GEO services:

• AI-ready content structuring and architecture
• Schema markup (Article, FAQPage, HowTo, Organization)
• Entity building for tech, blockchain, SaaS, and enterprise brands
• AI mention monitoring and citation tracking dashboards
• Content distribution across authoritative tech publications
• Full-funnel content strategy from product launch to international scale

2. SEONGON

Background: Founded in 2012, SEONGON is one of Vietnam’s most-cited Google Marketing agencies. As of 2026, it has executed over 5,000 projects for brands across 200+ markets. Clients include Vietnam Airlines, Sun Group, Viettel, MoMo, AEON Mall, and VNPay. In March 2026, SEONGON was shortlisted for “Best SEO Campaign” at the Global Agency Awards 2026 for its AI search work with Vietnam Airlines.

Key GEO-adjacent services:

• SEO AIMax: SEO integrated with Google AI Overviews
• AI Overview optimization and visibility tracking
• Digital ads (Google, Facebook, TikTok)
• Google Marketing training programs

3. GTV SEO

Background: Founded in 2016 by CEO Do Anh Viet, GTV SEO built its reputation on Semantic SEO and entity-based optimization the same technical foundation that underlies GEO. The agency has completed 400+ SEO projects and works with clients including Vinamilk, TOTO Vietnam, Bamboo Airways, Generali, and POPs Worldwide.

Key GEO-relevant services:

• Entity building and brand authority validation
• Semantic SEO and topical authority frameworks
• AI SEO strategy (integrated into SEO packages)
• Inbound marketing systems

4. Vinalink

Background: Founded in 1999, Vinalink is one of the oldest digital marketing firms in Vietnam, with offices in both Hanoi and Ho Chi Minh City. It runs both a client-services arm and one of Vietnam’s larger digital marketing training programs, which has educated thousands of practitioners.

Key GEO-relevant services:

• Full-service digital marketing (SEO, content, digital ads)
• Content strategy and multi-channel marketing
• Large enterprise and government sector experience

5. Novaon Digital

Background: Novaon Digital operates within the Novaon Group ecosystem, providing digital marketing services across Southeast Asia. It combines media buying, SEO, and content marketing for mid-to-large Vietnamese enterprises.

Key GEO-relevant services:

• Content marketing and authority building
• SEO and performance marketing
• Digital strategy for Southeast Asian market expansion

Conclusion

GEO is not a prediction about where marketing is going. It is where it already is. By late 2025, 29.2% of US internet users were using AI search daily up from 14% six months earlier. ChatGPT had 900 million weekly active users. Vietnamese brands that show up in AI-generated answers are reaching buyers who have already done their research, narrowed their options, and are closer to a purchasing decision than anyone arriving from a Google search.

The five agencies above represent the realistic landscape for GEO in Vietnam in 2026: one with deep technical infrastructure (SotaMedia), two with strong SEO foundations evolving toward GEO (SEONGON, GTV SEO), and two established full-service players extending their capabilities (Vinalink, Novaon Digital).

If you are a tech company, SaaS startup, or enterprise brand that needs GEO built on real technical depth, not just content advice, SotaMedia is the starting point.

Talk to the SotaMedia team about your GEO strategy.