SEO Agency Built on Science. - Work With SEO Specialists .
ProStar SEO is the SEO agency Canadian, American, and French businesses choose when they want real rankings, real revenue, and real accountability.
They're talking about us
— Your partner
About ProStar SEO : Our Expertise, Our Team, Our Methodology
ProStar SEO is a specialized SEO company founded by Éric St-Cyr that has scaled organic traffic, revenue, and search visibility for over six hundred clients across more than twenty industry verticals, with one hundred-plus brands actively engaged today. We work in the SERPs most generalist agencies cannot service profitably: regulated industries, multilingual markets, high-competition verticals, and emerging categories where the playbook is still being written.
Our expertise spans technical SEO, content marketing, local SEO, AI and LLM SEO, programmatic SEO, the full off-page SEO discipline of authority building, and PPC campaign management. We take care of the entire process, from strategy to content creation to integration and results tracking. We rank cannabis dispensaries, law firms, dental practices, online casinos, manufacturing brands, and SaaS-adjacent verticals where most agencies stop returning calls.
ProStar is a fully in-house operation. Every client gets senior SEO experts working on their account directly, not a junior team supervised by the partner who pitched the deal. We do not offshore, we do not subcontract, and we do not hide behind layers. Our SEO team speaks French, English, and Spanish natively, which is how we deliver multilingual SEO across Canada, the United States, and France without losing nuance in translation. Press coverage in Associated Press, Yahoo Finance, MarketWatch, and Markets Insider reflects the same standard.
Our Methodology: Contextual Density and the Scientific SEO Approach
Our methodology has a name: scientific SEO. The core idea is that every ranking factor we target should be measurable, testable, and reproducible. Where most agencies optimize on intuition, we optimize on data, and the results compound month after month.
The methodological foundation is contextual density, an approach refined into a complete framework documented in our contextual density strategy guide. Every page we write or optimize for entities, keywords, and backlinks follows the same four-step process:
- Competitive analysis at scale. We fetch the top-ranking pages for your target keyword across Google search and AI search, then extract every contextual term, entity, and semantic relationship they use.
- Term tiering by frequency. Terms used by all competitors become non-negotiable in body content and anchor text. Terms used by some become differentiators. Terms missed by all become competitive advantages.
- Density targeting above the highest competitor. We set a contextual density target that meaningfully exceeds the best-ranking page, then build content that hits it naturally.
- Real-time measurement and iteration. Once content is live, we track ranking movement, traffic, and conversions weekly, then adjust based on what the data and Google algorithm shifts show.
This is not a content recipe. It is a method, and it is the reason ProStar wins in regulated, competitive, and emerging-industry SERPs where generic SEO playbooks stall.
Most agencies optimize by intuition. We optimize by evidence.
— Our approach —
What Makes ProStar a Different Kind of SEO Company
Most SEO companies promise rankings and deliver dashboards. We take a different approach. ProStar is a fully specialized SEO agency, not a generalist digital marketing agency, and every member of our team of senior SEO experts works in-house across North America. That focus shows up in everything we do, from how we structure strategy to how we earn your retention month after month.
Scientific SEO Backed by Real-Time Data
Our approach to scientific SEO treats every campaign as a measurable experiment. We test hypotheses, monitor signals in real time across Google Search Console, GA4, Semrush, and Ahrefs, and adjust strategy based on what the data actually shows. The opposite of one-size-fits-all SEO packages is not “custom” as a marketing word. It is custom as a method, where every recommendation traces back to evidence from your site, your competitors, and your audience’s search behavior.
Multilingual SEO Across Three Languages and Three Markets
ProStar is the rare SEO firm that delivers fully native optimization in French, English, and Spanish. Our bilingual SEO services cover Canadian businesses navigating both official languages, while our Spanish capability extends naturally into the US Hispanic market that most American SEO companies leave on the table.
Multilingual SEO is not translation with keywords sprinkled on top. It is an independent strategy, separate keyword research, and culturally relevant content in each language we serve.
No Long-Term Contracts, Just Measurable Results
Every other SEO agency you have interviewed wants a six-month or twelve-month commitment to “build authority.” We work on transparent monthly pricing with thirty days notice to cancel. That structure forces us to earn your retention through measurable results, not contractual obligation. If we are not adding revenue, you are not paying for another year of underperformance.
We Build What We Recommend: In-House Web Development
Most SEO agencies stop at recommendations. We do not. The biggest reason businesses hesitate to invest in SEO is not the SEO retainer itself, it is the web development cost on top of it. Every other agency hands you a PDF of fixes and tells you to find a developer.
We employ a full-time in-house web development team that handles all integration work, from technical SEO implementation and Core Web Vitals fixes to schema deployment and on-page content updates. You get strategy and execution under one roof, with no third-party developer to coordinate, no scope-of-work disputes, and no SEO recommendations that sit in a backlog for six months because your dev team is too busy.
— OUR SPECIALTIES —
Our services
Book a Free SEO Audit
with Our Expert Team
Free audit. No contract. Real findings you can act on this week. Our expert team will analyze your site, your competitors, and your search landscape, then walk you through the highest-impact opportunities.
— Case Studies
Proven Results
Across 600+ Clients in 20+ Industries
Our active client base reflects the breadth of our expertise: brands generating revenue, attracting qualified leads, and boosting search visibility year-over-year. We adapt our innovative methodology to each industry, from AI SEO and ecommerce SEO to Google penalty recovery, and we serve Canadian businesses from Vancouver to Halifax, American clients from New York to Los Angeles, and French companies in Paris, Lyon, and Marseille.
We operate enterprise SEO programs for clients with large multi-location and multi-language sites, backed by responsive senior staffing and continuous communication on brand awareness and customer acquisition outcomes.
Case Studies in Competitive and Regulated Markets
Our client case studies document the same pattern across every engagement: measurable ranking gains, top rankings for high-intent commercial keywords, and sustainable organic traffic growth that converts. Our experienced SEO strategist team builds continuous monthly reporting so clients see exactly which terms moved and how that traffic converted into pipeline.
We have run multi-location SEO programs across hundreds of franchise units, B2B SEO campaigns where the buyer journey takes nine months, and high-stakes Google penalty recovery engagements. The discipline is the same in every case: contextual density, scientific measurement, and senior-only execution that lets our clients dominate their categories.
Our Results
— SEO ROI
How We Measure ROI and Track Organic Traffic Growth
We measure SEO performance the way our clients measure their business: by revenue and qualified pipeline, not vanity metrics.
Every engagement starts with three measurement decisions:
The conversion events that matter
Booked consultations, qualified leads, transactions, contract value.
The attribution model that ties organic traffic to those conversions
Through GA4, Search Console, and CRM integration.
The reporting cadence that keeps stakeholders informed
Without drowning anyone in dashboards.
We then track ongoing organic traffic growth, keyword position gains, conversion rate, and revenue attribution against those baselines every week, and we continuously improve campaign performance based on what the numbers show.
— Professional and healthcare
SEO for Professional
and Healthcare Services
Professional and healthcare verticals share a common SEO challenge: high local competition, reputation-sensitive buyer behavior, and a buying journey that rewards trust signals over keyword stuffing.
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Our work in this group prioritizes:
- Local visibility in the geographies where your patients and clients actually live
- Review and reputation signals that influence both rankings and conversion
- Authoritative content demonstrating real expertise in your specialty
- Compliance-aware optimization for HIPAA, bar association rules, and other regulatory frameworks
Law firm SEO is one of the most competitive professional services niches. We rank firms across personal injury, family law, criminal defense, and corporate practice areas in both US and Canadian markets.
Dental SEO is hyperlocal, with most patient searches happening within a five-mile radius of the practice. We rank dental clinics in Google’s local pack and on conventional SERPs in both languages.
Plastic surgery SEO and cosmetic surgery marketing require visual content strategy, before-and-after compliance, and trust signals that take longer to build than other healthcare verticals.
Medspa marketing combines aesthetic-vertical SEO with the local-search dynamics of high-end consumer services. We grow medspa brands through organic search and content authority.
Healthcare SEO covers private medical clinics, specialty providers, and multi-location healthcare practices. Our work navigates YMYL scrutiny while building the topical authority healthcare brands need.
Hotel SEO depends on direct-booking conversions over OTA dependency. Our hotel SEO program targets high-intent travel keywords and builds the booking-page authority hotels need to win against aggregator sites.
— Regulated Industries
Search Engine Optimization
for Regulated Industries
Regulated industries face SEO challenges most agencies refuse to take on: platform restrictions, advertising bans, compliance constraints, and search algorithms that treat sensitive verticals differently. We have spent years building expertise in exactly these environments, and our online reputation management program complements every regulated-industry engagement where review and brand monitoring is critical.
Cannabis and CBD businesses cannot use Google Ads at scale, which makes organic visibility the entire game. We rank cannabis dispensaries, CBD retailers, and hemp brands across both US states and Canadian provinces.
Online casino SEO is one of the most competitive niches on the web. We have ranked international gambling brands in markets where the SERPs are saturated and the keyword competition is professional-grade.
Adult SEO is our highest-traffic vertical, with our adult SEO page alone generating over 600 monthly clicks. We rank adult content businesses, creators, and platforms where mainstream channels do not work.
Firearms and gun retailers face advertising restrictions across most paid channels. Our firearms SEO program builds organic visibility for gun dealers, armorers, and shooting accessories brands without paid-media dependencies.
Pharmaceutical SEO requires deep understanding of YMYL content rules, E-E-A-T signals, and regulatory boundaries. We rank pharma companies and medical brands within strict compliance frameworks.
Banking and finance SEO operates under YMYL scrutiny similar to pharma. Our banking SEO program builds the authority signals that financial institutions need to rank against entrenched competitors.
— Emerging industries
SEO for High-Growth
and Emerging Industries
Emerging industries do not have established SEO playbooks. We build them. Our work across crypto, gaming, and high-growth verticals starts with first-principles competitor analysis because the SERP patterns shift every quarter as these markets mature.
Crypto and blockchain SEO requires constant adaptation to algorithm updates that frequently target the space. We rank cryptocurrency exchanges, DeFi platforms, and Web3 brands through audit and content-driven authority.
Gaming SEO covers video game developers, esports platforms, and gaming media brands. We compete in keyword landscapes shaped by enthusiast communities and rapid product cycles.
Real estate SEO blends hyperlocal optimization with national brand visibility for agencies operating across multiple markets. We rank real estate brokerages and property platforms in their highest-conversion geographies.
Car dealership SEO captures local buying intent for new and used vehicle inventory. Our automotive SEO programs combine technical site optimization with inventory-feed strategies.
Manufacturing SEO is B2B-heavy, with long sales cycles and technical buyer journeys. We rank manufacturers for the specifications, materials, and capabilities their procurement buyers actually search for.
Franchise SEO must balance corporate brand consistency with local relevance across dozens or hundreds of locations. Our franchise SEO programs scale across multi-location networks without sacrificing local ranking power.
Get Your Custom SEO Strategy from Award-Winning Experts
Award-winning, results-focused, and ready when you are. Custom SEO strategy from senior in-house experts, no contracts, no offshoring.
— Global SEO
Global SEO Services
Across Canada, the USA, and Europe
ProStar operates as a global SEO agency with senior-only teams serving clients across three continents and three languages. Our regional expertise spans the bilingual Canadian market, the hyper-competitive US landscape, and the multilingual European audience.
SEO Across Canada: From Montreal to Vancouver
ProStar has been Canada‘s bilingual SEO partner since 2019! We rank businesses in Toronto, Montreal, Vancouver, Ottawa, Calgary, and Edmonton, plus dozens of secondary cities from Halifax to Victoria. Our Canadian presence and bilingual senior strategists mean clients get teams who actually understand the local SERPs, the bilingual buyer journey, and the competitive landscape of their specific market.
SEO Across the United States: From New York to Los Angeles
The US market is the most competitive SEO landscape in the world, and ProStar has built dedicated expertise across every major American metro. We rank clients in Denver, Seattle, Philadelphia, San Francisco, Boston, and Los Angeles, plus city-specific vertical programs covering dental, legal, and plastic surgery practices in high-demand US markets. Our Spanish-language capability also extends our reach into the US Hispanic market, which most American SEO companies cannot service natively.
SEO Across Europe: UK, France, and Spain
Europe is a fragmented SEO market where language fluency separates native-quality content from competitive irrelevance. ProStar serves European clients in three primary markets, each in its own native language: English campaigns across the United Kingdom and Ireland, French campaigns for France and French-speaking Belgium, and Spanish campaigns across Spain.
Start Ranking Higher
with a Top-Rated SEO Agency Today
No contracts. No offshoring. Just SEO that drives revenue. Connect with a senior strategist and let us drive higher rankings and business growth for your business.
SEO Agency FAQs
How Long Does It Take to See SEO Results?
Most clients see early ranking movement within sixty to ninety days, with meaningful organic traffic and revenue impact compounding from month four onward. The exact timeline depends on your starting authority, competitive landscape, and the technical health of your current site. SEO is a long-term investment, but the early wins from technical fixes and content optimization often arrive faster than expected.
Why Choose ProStar Over a Generalist Digital Marketing Agency?
A generalist digital marketing agency divides attention across social, paid, design, and SEO. ProStar does SEO and only SEO, which means our senior strategists, content team, and technical specialists work on your search performance every day. Specialization is the difference between adequate rankings and dominant ones. If you need SEO that beats competitors who have full-time agencies dedicated to it, you need a specialized SEO company doing the same.
Do You Offer Bilingual and Multilingual SEO Services?
Yes. ProStar delivers fully native bilingual SEO services in French and English, plus Spanish-language optimization for clients targeting Hispanic markets across the Americas. Each language gets independent keyword research, localized content strategy, and culturally appropriate technical structure. This is not translation. It is multilingual SEO designed from the ground up for each language.
What's Included in a Free SEO Audit?
A free SEO audit covers your site’s technical health, on-page optimization, backlink profile, top competitive gaps, and three to five highest-impact opportunities. You receive a written report and a one-hour strategy call to walk through the findings. If you need a deeper diagnostic, our in-depth technical SEO audit covers Core Web Vitals, indexation, schema, and crawl-path analysis at full depth.
How Is Your No-Contract Pricing Different from Other SEO Companies?
Most SEO companies require six-month or twelve-month commitments. ProStar operates on transparent monthly pricing with thirty days notice to cancel. The model forces us to earn your business every month through measurable results instead of contractual lock-in. Clients stay because performance keeps improving, not because they signed away their flexibility.