What Centrus Digital does

Centrus Digital is a privately held, boutique digital marketing agency headquartered in Portsmouth, New Hampshire, founded in 2004 by Robert Rustici. The firm operates a senior-led "Strategic Collaborative" model where Managing Partners Robert Rustici and Jonathan Day personally architect client engagements, supplemented by a curated network of vetted independent specialists known as the Centrus Circle covering web design (Germeroth, Graphic Details), brand strategy (Brandartica), social paid media (True Shot Media), data science (KnoWhere), and video production (Testwood Creative). The agency employs 1–10 people internally.

The company's core services span paid search and social advertising (Google Ads, Bing, Facebook/Instagram, YouTube, Reddit, Spotify, Amazon), Local SEO combined with Generative Engine Optimization (GEO) for AI-driven search, hyper-targeted audience segmentation, marketing automation deployment on Constant Contact Automation and Pardot/Salesforce, and Unbounce-based landing pages with dynamic text replacement. A proprietary 90-minute Marketing Model Canvas workshop, launched in 2025, is the firm's E-E-A-T alignment methodology for AI search engines. Centrus maintains Google Partner status and integrates GA4 with closed-loop attribution across client accounts.

Commercially, Centrus generates revenue through tailored monthly retainers for managed paid media, project-based engagements for SEO/GEO workshops, ongoing marketing automation managed services, and white-label PPC delivered confidentially under partner agency brands. Pricing is not publicly disclosed; client minimum ad budgets start at ~$1,000/month for small businesses and scale to $10,000+/month for enterprise marketing teams. The firm serves four distinct segments—nonprofits (with specialized Google Ad Grant management for $10,000/month credits), small businesses seeking scale beyond local markets, in-house marketing teams seeking fractional paid media oversight, and other marketing agencies seeking white-label delivery—with no institutional investment, parent company, or disclosed revenue figures.

Name

Centrus Digital

Legal name

Centrus Digital Marketing Agency

Website

https://centrus.digital

Company type

Private

Founded year

2004

Operating status

Operating

Headcount range

1–10 employees

Short description

Centrus Digital is a privately held boutique digital marketing agency in Portsmouth, NH that provides senior-led paid media management, SEO/GEO, hyper-targeting, and marketing automation to nonprofits, small businesses, marketing teams, and other agencies via its Centrus Circle specialist network.

Ownership category

akta.pro rank

Headquarters

HQ city

Portsmouth

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Technology or R&D, Marketing or Sales, Operations

Revenue model

1. Managed Paid Media Services: Ongoing management of paid advertising campaigns across Google Ads, Bing, Facebook/Instagram, YouTube, Reddit, Spotify, and Amazon. Delivered through the Centrus Circle collaborative of vetted specialists under strategic leadership of Managing Partners.
2. SEO & GEO Strategy Workshop (Project-Based): Project-based Marketing Model Canvas workshop and technical SEO/GEO implementation. Focused on foundational transformation rather than perpetual monthly retainers. Includes structured schema integration, keyword research, and AWR dashboards.
3. Marketing Automation Services: Setup and management of closed-loop marketing automation using Constant Contact Automation (SharpSpring) and Pardot/Salesforce Marketing Cloud Engagement, including CRM integration and MQL-to-SQL tracking.
4. White-Label PPC Agency Services: Agency-to-agency collaborative providing fractional Paid Media Director services. Operated confidentially under partner agency branding with 'Silent Audit' prospect qualification included.

Pricing tiers

Go-to-market motion3 records

Distribution channels4 records

Marketing channels9 records

Core offering

Centrus Digital is a boutique digital marketing agency that delivers senior-led paid search management, SEO/GEO strategy, hyper-targeting, marketing automation, and custom landing page development across Google Ads, Bing, YouTube, Facebook/Instagram, Reddit, Spotify, and Amazon. The agency operates a Strategic Collaborative model (Centrus Circle) that assembles vetted specialist teams for each project, with proprietary methodologies including the Marketing Model Canvas, E-E-A-T Alignment, Hyper-Targeting Framework, and Human-in-the-Loop Calibration.

Product overview

Centrus Digital is a boutique Portsmouth, NH-based marketing agency operating as a Strategic Collaborative that curates custom teams from a vetted specialist network called the Centrus Circle. The core offering consists of Paid Search Ads (Google, Bing, YouTube, Facebook/Instagram, Reddit, Spotify, Amazon), Local SEO & GEO Strategy, Hyper-Targeting Services, Marketing Automation (specializing in Constant Contact Automation and Pardot), and Custom Landing Pages built on Unbounce. These services are delivered through their proprietary Marketing Model Canvas methodology. The agency specializes in serving nonprofits (including Google Ad Grant management), small businesses, internal marketing teams, and other marketing agencies (white-label). With over 12 years of experience and Google Partner status, the company emphasizes 'Expertise on Demand' through senior-level specialists rather than junior staff.

Differentiator

Problem solved

Functional benefit

Products and services

• Paid Search Ads (Google & Bing) Veteran-led paid media management across Google and Bing Search, capturing high-intent users through value-based bidding and AI-native search strategies. Includes omnichannel presence across YouTube, Facebook, Instagram, Reddit, Spotify, and Amazon, designed for organizations seeking senior-level oversight of paid advertising.
• Local SEO & GEO Strategy Search visibility optimization combining traditional SEO with Generative Engine Optimization (GEO) for AI search engines. Includes the proprietary Marketing Model Canvas workshop, structured schema (JSON-LD) integration, and E-E-A-T authority building for AI-driven search environments, designed for organizations seeking to establish authority in AI Overview results.
• Hyper-Targeting Services Precision audience targeting using geo-fencing, behavioral triggers, intent-based targeting, and first-party data signals. Designed to decode 'black box' ad platforms and train AI bidding systems for maximum ROI through customer intelligence gathering, targeting organizations seeking to reduce cost-per-acquisition through superior audience control.
• Marketing Automation Closed-loop automation bridging marketing platforms and sales results. Specializes in MQL to SQL synchronization, lead scoring intelligence, and privacy-compliant data loops using Constant Contact Automation (SharpSpring) and Pardot/Salesforce Marketing Cloud Engagement, designed for marketing teams seeking to connect campaign spend to closed revenue.
• Custom Landing Pages (Unbounce) Conversion-optimized landing pages built on the Unbounce platform with Dynamic Text Replacement (DTR) synced to search terms, A/B and multivariate testing, and mobile-first design. Maintains 'scent of the click' from ad to landing page, designed for paid media campaigns requiring high conversion rates.
• Google Ad Grant Management Specialized management of Google Ad Grants for nonprofits, leveraging uncapped automated bidding, AI Max, Performance Max for Search, and full-funnel GA4 attribution to maximize the $10,000 monthly Google Ad Grant credit. Designed for nonprofit organizations seeking to optimize their free Google advertising allocation.
• Marketing Model Canvas Workshop Proprietary 90-minute strategic workshop extracting brand DNA and translating it into E-E-A-T signals for AI search engines. Covers Authoritativeness, Experience, Expertise, and Trustworthiness authority pillars, offered as a paid methodology engagement for organizations seeking foundational transformation of their AI search visibility.
• Nonprofit Marketing Services Digital marketing services tailored for nonprofit organizations including Google Ad Grant management, donor acquisition, fundraising campaign support, and local SEO to expand reach and mission awareness. Designed for nonprofits seeking to grow audiences and revenue with limited marketing budgets.
• Small Business Marketing Growth-focused paid search and digital marketing for small businesses transitioning from local to regional/national presence. Includes hyper-targeted expansion, AI-enhanced lead quality assessment, and 'Anti-Black Box' transparent reporting. Practical entry point cited is $1,000/month ad budget with a 3-6 month trial period.
• Marketing Team Partnership Fractional paid media advisory for internal marketing teams managing $10,000+ monthly ad spend. Provides advanced bid strategy calibration, AI search intelligence, and GA4 technical auditing as an extension of the internal team, designed for in-house marketing leaders seeking senior strategic oversight beyond platform-recommended automation.
• Agency Partnership / White-Label PPC Agency-to-agency collaborative providing veteran-led paid media management that marketing agencies can resell under their own brand. Includes 'Silent Audit' service for prospect qualification and advanced feedback loop integration for GA4 and CRM data, operated confidentially under partner agency branding for agencies whose clients spend $10K+/month in paid ads.

Quantifiable outcome

• Revenue growth from ~$2M to ~$6M over 5 years (The Music Hall nonprofit, 2019–2024)
• +4 more outcomes

Named customers3 records

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration8 records

AI capability9 records

Feature5 records

Partnerships

Eight partnerships are on record, tiered core, secondary and minor.

• Germeroth Consulting & CreativecoreStrategic or Co-development PartnerWebsite design and technical SEO partner specializing in high-performance WordPress builds. Lee is the 'go-to' expert for ensuring technical foundation is optimized for speed, mobile responsiveness, and clean SEO code. Core node in the Centrus Circle ecosystem.
• Graphic DetailscoreStrategic or Co-development PartnerWeb design partner for information-rich websites, managing complex information design and organization for nonprofit and educational organizations. Collaborated with Centrus on The Birchtree Center website redesign and local SEO project.
• BrandarticasecondaryStrategic or Co-development PartnerCreative agency and brand strategy partner with deep experience in consumer products and brand building. Helps organizations define visual and narrative identity from the ground up. Specialty: Brand Identity, Creative Strategy, Consumer Product Marketing.
• True Shot MediacoreTechnology or IntegrationSocial media and Facebook/Instagram PPC partner. Turns social platforms into predictable lead-generation engines using advanced targeting that complements the Centrus data-first philosophy. Aaron Fletcher serves as the specialized expert in this partnership.
• KnoWherecoreTechnology or IntegrationData science and hyper-targeting partner providing advanced data-mining capabilities. Enables 'de-coding' the black box of modern advertising with precision data required to 'train' AI bidding systems for maximum ROI. Core to Centrus's hyper-targeting methodology.
• Testwood CreativesecondaryStrategic or Co-development PartnerMedia production and storytelling partner providing cinematic 'About Us' videos and motion graphics. Helps brands become cited authorities in AI-driven landscapes through emotional video storytelling. Specialty: High-end production value and visual branding.
• SCOREminorStrategic or Co-development PartnerRobert Rustici volunteers as a SCORE mentor, providing free business guidance alongside his Centrus work. Extends Centrus's community presence and thought leadership in digital marketing.
• Chamber Collaborative of Greater PortsmouthminorStrategic or Co-development PartnerJonathan Day serves as Chair of the Ambassador Committee for the Chamber Collaborative of Greater Portsmouth. Key community partnership for local business networking and brand credibility in the Portsmouth NH area.

Scale indicators5 records

Recent moves6 records

Expansion highlights4 records

Direct peers

• Disruptive Advertising: PPC and paid media management agency of similar mid-boutique scale, also holding Google Premier Partner status and serving SMB through mid-market clients. Directly comparable in service mix (paid search, social, CRO) and target customer profile.
• KlientBoost: Performance marketing agency specializing in PPC and conversion rate optimization for SaaS and B2B. Closely comparable in focus on hyper-targeting, A/B-tested landing pages, and senior-led campaign management.
• Ignite Visibility: Full-service digital marketing agency offering SEO, paid media, social, and email with a comparable SMB-to-mid-market focus. Overlapping service portfolio and similar cross-channel methodology.
• Directive: B2B-focused performance marketing agency offering paid media, SEO, and content strategy. Comparable in serving marketing teams and delivering senior strategist engagement.
• Power Digital Marketing: Full-service digital marketing agency combining paid media, SEO, and content with a tech-enabled operating model. Comparable in mid-market focus and integrated service delivery.
• AdVenture Media Group: PPC-specialist agency offering Google Ads and Facebook Ads management with senior-led model. Closely comparable in narrow paid-media focus and transparent reporting philosophy.
• LYFE Marketing: Digital marketing agency offering social media marketing, PPC, and SEO to SMB clients. Comparable in targeting small business owners transitioning from local to regional/national reach.
• Coalition Technologies: Full-service digital agency offering SEO, PPC, web design, and email marketing. Comparable service mix and similar cross-channel boutique-to-mid-market positioning.

Broad incumbents

• WebFX: Much larger full-service digital marketing agency offering SEO, PPC, web design, and marketing automation. Comparable service categories but operates at significantly greater scale with hundreds of employees.
• Tinuiti: Large independent performance marketing agency with deep Google/Meta/Amazon expertise. Overlapping service offering but at substantially greater scale; useful comparable for valuation benchmarking.

Market position

Strengths5 records

Weaknesses4 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xtwitter.com/centrusdigital
• Facebookfacebook.com/centrusdigital
• Instagraminstagram.com/centrusdigital

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Centrus Digital