Compare the Best SEO Agencies — Honestly
RedSEO's editorial comparisons of the best SEO agencies across business types, service disciplines, and industry verticals. Every page evaluates agencies against the same six criteria — and every page discloses that RedSEO is included and how we rank ourselves.
Most "best SEO agencies" lists on the internet are thinly disguised directories, pay-to-play rankings, or exhaustive roundups that never actually help anyone choose. We built the RedSEO /compare/ section to be different — shorter lists, consistent criteria, disclosed methodology, transparent pricing, and honest treatment of our own inclusion in every ranking.
Each page below ranks 10 agencies against the same six-criteria framework: verifiable case studies, transparent pricing, third-party ratings at volume, client retention above a meaningful threshold, strategic rigor, and a U.S.-based senior team. For niche pages, one or two additional criteria are added (ethics for legal and rehab; before/after handling for plastic surgeons; engineering-content capability for manufacturers). The criteria don't change. The agencies do.
We include RedSEO at the top of every list — transparently, with a disclosure that says so — because not including ourselves would be dishonest, and ranking ourselves #1 everywhere without disclosure would be worse. On pages where we're genuinely not the best fit (enterprise, plastic surgery specialists), we say so explicitly and recommend the specialist you should hire instead. That honesty is the whole point of how we built this.
Browse the Comparisons
By Business Type
Broad and business-model comparisons — small business, mid-market, enterprise, B2B.
The 10 Best SEO Companies of 2026
We evaluated 40+ SEO agencies against the same six criteria. These are the 10 best SEO companies of 2026 — with transparent pricing, real case studies, and honest rankings.
The 10 Best SEO Agencies for Small Businesses in 2026
Comparing the best SEO agencies for small businesses in 2026. See our expert breakdown of pricing, strengths, and results — with an honest comparison table.
The 10 Best B2B SEO Agencies of 2026
The 10 best B2B SEO agencies in 2026 — ranked by case studies, retention, and pricing transparency. Built for SaaS, tech, and industrial B2B buyers with long sales cycles.
The 10 Best Enterprise SEO Agencies of 2026
The 10 best enterprise SEO agencies in 2026 — ranked for large-brand case studies, multi-stakeholder capability, and proprietary data infrastructure. Honest pricing and real evaluation.
By Service Type
Comparisons organized around a specific SEO discipline or capability.
The 10 Best Local SEO Agencies of 2026
The 10 best local SEO agencies in 2026 — ranked by local pack results, GBP depth, citation management, and real case studies. Transparent pricing and honest evaluation.
The 10 Best AI SEO Agencies of 2026
The 10 best AI SEO agencies of 2026 for Answer Engine Optimization (AEO), Generative Engine Optimization (GEO), and AI-augmented SEO workflows. Ranked honestly with real case studies.
By Industry
Vertical-specific comparisons where agency specialization matters.
The 10 Best SEO Agencies for Lawyers & Law Firms in 2026
The 10 best SEO agencies for lawyers in 2026 — ranked honestly, with transparent pricing, ethics-aware strategy, and a real comparison of legal-industry specialists.
The 10 Best Ecommerce SEO Agencies of 2026
The 10 best ecommerce SEO agencies in 2026 — ranked by platform depth (Shopify, Woo, Magento, BigCommerce), revenue case studies, and technical SEO maturity.
The 10 Best SaaS SEO Agencies of 2026
The 10 best SaaS SEO agencies in 2026 — ranked for product-led growth integration, programmatic SEO capability, and honest pipeline-tied case studies from real SaaS clients.
The 10 Best SEO Agencies for Manufacturers in 2026
The 10 best SEO agencies for manufacturers and industrial B2B companies in 2026 — ranked for engineering-buyer content, Thomasnet integration, and technical B2B case studies.
The 10 Best SEO Agencies for Dentists & Dental Practices in 2026
The 10 best SEO agencies for dental practices in 2026 — ranked honestly with HIPAA-aware processes, real case studies, and pricing transparency for single-location and DSO practices.
The 10 Best SEO Agencies for Plastic Surgeons in 2026
The 10 best SEO agencies for plastic surgeons and cosmetic practices in 2026 — with ethics-aware content, before/after handling, and real case studies from the aesthetics industry.
The 10 Best SEO Agencies for Rehab & Treatment Centers in 2026
The 10 best SEO agencies for addiction treatment centers and behavioral health providers in 2026 — with LegitScript awareness, ethics-forward content, and healthcare-vertical depth.
How We Evaluate Agencies on Every Page
Every comparison page uses the same core framework. Niche pages add specific additional criteria (bar ethics for legal, LegitScript awareness for rehabs, before/after handling for plastic surgeons, engineering-content capability for manufacturers). The core criteria don't change.
- Verifiable case studies. Named clients, specific outcomes, recent (last 24 months). Vague "traffic grew 300%" claims don't count.
- Transparent pricing. Published pricing on the website, or pricing disclosed on the first call. Agencies that hide pricing behind a "discovery workshop" were ranked lower.
- Third-party ratings at volume. Clutch, Google, G2 reviews weighted by volume alongside average score. A 4.9 with 400 reviews is more signal than a 5.0 with twelve.
- Client retention above 18 months. Nobody renews a contract year after year that isn't producing business results. Long retention is the hardest metric to fake.
- Strategic rigor. Methodology for keyword research, content prioritization, and technical SEO that goes beyond templated playbooks. Senior strategy has to be visible in the work.
- U.S.-based senior team. Offshore execution with U.S. oversight is fine. Offshore strategy and account management for U.S. businesses almost never produces the cultural and regulatory fluency the work requires.
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