Top 10 Agencies Leading Answer Engine Optimization (AEO) in 2025

Why brands now hire agencies for AEO

Google’s AI Overviews, ChatGPT Browse, Perplexity, Claude, Gemini Search, Copilot Answers and dozens of niche “answer engines” already handle hundreds of millions of queries a day. Research firm Gartner predicts that classic web-search traffic will drop 25 percent by 2026 as users shift to conversational answers (contently.com).
Yet only 32 percent of enterprise marketers feel “very confident” they can diagnose when—or why—their brand disappears from an AI answer block, according to BrightEdge’s June-2025 survey of 750 professionals (passion.digital).

Agencies have rushed to fill that skills gap, pairing technical SEO muscle with structured-data engineering, entity management and AI-prompt analytics. Below are the ten firms most capable of turning AEO theory into measurable, board-level KPIs.

How we ranked the agencies

All facts and figures are drawn from public documents dated April – July 2025, listed in Sources.

1 | Contently Strategic Services — Full-funnel AEO with 160 k talent on tap

Contently is best known for its SaaS platform, but its Strategic Services arm now offers an “LLM Optimization Blueprint™” covering schema engineering, entity audits and conversational-prompt testing. Clients can tap a network of 160 000-plus vetted freelancers for rapid human reviews or long-form rewrites when AI citations slump (support.contently.com).
2025 highlight: a mid-market SaaS client added the blueprint in March and recorded a 42 % lift in AI-generated referral traffic within 30 days (contently.com).

2 | NoGood — Growth-marketing agency turned AEO specialist

New-York-based NoGood launched a stand-alone Answer Engine Optimization Service in May 2025, bundling LLM-citation tracking, schema roll-outs and prompt-gap dashboards (nogood.io). Adweek listed the firm among America’s fastest-growing agencies for the third year running, citing its AI-search wins for fintech and health-care clients.

3 | Brainlabs — Performance shop building an “AI Search Lab”

Brainlabs’ “AI Search Lab” combines log-file analysis, structured-data sprints and hourly AI-Overview scrapes. In an Adweek interview, Chief Product Officer Jeremy Hull warned that Google’s AI search could cut organic clicks by 25 %—and outlined Brainlabs’ new playbook to keep brands visible (brainlabsdigital.com).

4 | NP Digital — Neil Patel’s crew goes entity-first

NP Digital’s AI-Search Optimization practice focuses on entity consolidation: making sure finance, e-commerce and SaaS brands show up as high-confidence sources inside ChatGPT and Gemini answers. The firm’s 2025 service page positions AEO as the missing link between traditional SEO and CRO (npdigital.com).

5 | Found — The “Everysearch™” methodology from London

Found invested £1 million in its proprietary Luminr platform to map the “entire searchable web,” including AI assistants and social-search feeds. Its Everysearch™ approach crosses classic SEO with AI-visibility analytics to prioritise content that answer engines already trust (found.co.uk).

6 | Rise at Seven — PR virality meets AI-answer share-of-voice

The creative-led shop behind PrettyLittleThing’s viral TikTok campaigns now overlays that cultural heat with AI-citation tracking. A 2025 case study shows 8× ROI from campaigns engineered to feed PLT product data into ChatGPT snippets (riseatseven.com).

7 | Zen Media — B2B visibility via the Brand AI Visibility Index (BAIV)

Zen Media’s BAIV framework quantifies how often a B2B brand shows up in “high-value AI answers” across engines and intent clusters (zenmedia.com). Scores feed directly into content briefs and PR outreach, turning fuzzy AI metrics into board-friendly funnels.

8 | iQuanti — Analytics-first consultancy for regulated verticals

iQuanti’s finance-sector study across ChatGPT, Google AIO and Perplexity revealed that entity authority beats backlink volume in AI answers. The firm shared its findings at DMFS Summit West 2025 and now offers an AEO accelerator for banks and insurers (iquanti.com). Forrester also named iQuanti a “notable vendor” in its Q1 2025 SEO Solutions Landscape (prnewswire.com).

9 | Passion Digital — UK boutique with an AI-first SEO division

Passion’s AI SEO & GEO team pairs predictive forecasting with automated prompt creation to keep brands present in ChatGPT, Gemini and Copilot answers (passion.digital). The agency is a Drum Recommended Agency and a 2025 Google Premier Partner, placing it in the global top 3 % of partners (passion.digital).

10 | Single Grain — “Answer Everywhere” optimization for omnichannel brands

Eric Siu’s Single Grain coined Answer Everywhere Optimization (AEvO)—blending AEO with social-search and marketplace-search tactics. Their March-2025 playbook shows how to secure citations across voice, social and AI assistants in one sprint (singlegrain.com).

Quick-scan comparison

Emerging agency best-practices

1. Prompt taxonomies over keywords – agencies build question-clusters by intent stage, mirroring People-Also-Ask data and LLM topics.

2. Schema ubiquity – FAQ, How-To, Product, and Organization markup remain the clearest LLM signals.

3. Entity consolidation – PR, knowledge-graph edits and citation outreach align to one canonical brand entity.

4. Hourly monitoring loops – SerpApi or in-house scrapers fire Slack / Teams alerts when citation share drops.

5. Conversation design sprints – teams prototype how brand messaging sounds when read aloud by Gemini or Alexa before content goes live.

Frequently asked questions

Is AEO replacing SEO?
No. Technical SEO still decides whether models can discover your pages. AEO controls how those models represent you once they ingest the content.

What’s the biggest AEO hurdle?
Attribution. AI answers rarely pass referral data, so agencies triangulate log files, answer snapshots and branded-search lift to estimate impact.

How fast can results appear?
Schema fixes can surface in ChatGPT or Gemini within days, but entity-authority work (PR, citations, reviews) often takes one to three months.

Conclusion

Answer engines are already the first stop for product research, coding help and news. The agencies above combine technical SEO heritage with AI-era playbooks to keep brands in those high-trust answers. Whether you’re a Fortune 100 CMO or a Series-B SaaS founder, 2025 is the year to embed AEO in retainer scopes and quarterly OKRs—before the next model update decides which brands exist in the conversation.