SEO.co
// seo agency · San Diego

San Diego SEO Agency

SEO AUDIT SERVICESBACklink services
200+
Ranking factors audited per page
01
15 yrs
Of search-algorithm operational history
02
5K+
Keywords moved into top-10 positions
03
F500
Clients alongside startups & agencies
04
~/seo.co/markets/san-diego
$ seo.co --target san-diego --strategy local

San Diego SEO, run from a national bench.

Local pack rankings, Google Business Profile optimization, citation hygiene, and review-signal engineering for San Diego-based businesses — operated by the same team that ranks Fortune 500 brands nationally.

// engineering methodology

How we engineer rankings.

A five-phase loop, repeated continuously. No black boxes — every step traceable to a measurable signal.

seo.co — process.ts
01
$ seo.audit()
Diagnose

200-point technical, content, and backlink audit. Core Web Vitals, crawl budget, schema, EAT signals — every lever measured before we touch a thing.

02
$ seo.strategy()
Cluster

Keyword universes mapped to topical authority pillars. Intent matched to content. Internal-link graph designed before a single page ships.

03
$ seo.execute()
Build

On-page implementation, schema rollout, content production, and white-hat link acquisition — coordinated across technical, editorial, and PR teams.

04
$ seo.measure()
Track

Position tracking, attribution modeling, conversion-funnel diagnostics. Weekly reports tied to revenue, not vanity metrics.

05
$ seo.optimize()
Iterate

Algorithm-update response within 48 hours. Competitive deltas surfaced in real time. Continuous remediation on the pages losing ground.

A San Diego, California SEO Company with over 10 years of experience

Our San Diego SEO company has provided SEO agency, digital marketing and link building services to California businesses for over a decade. We work at organic and paid search optimizations for small businesses and Fortune 1000 clients alike.

Our SEO services provide expert guidance all matter related to search engine optimization (SEO) for San Diego's local and national businesses alike.

As a premier provider of SEO services in San Diego, we measure our results in the direct revenue we have driven for our clients.

We have been serving as San Diego SEO experts for over a decade. We deliver top-level search engine rankings and internet marketing services to San Diego companies.

When most people think about San Diego, they think about perfect weather, sun-drenched coastline, dark blue ocean, and a thriving food scene. But the laid back vibe of San Diego is only part of the story. This Southern California city is home to a thriving business scene and booming industries.

Forbes once called San Diego the “best place to launch a startup.” And for San Diego business owners, it’s clear why. With booming businesses in sectors like international trade, tourism, military and defense, and research/manufacturing, there’s access to some of the country’s top resources.

Home to companies like Qualcomm, Sanyo, Sony, TIG, and dozens of other nationally recognized brands, there’s never been a better time to build a San Diego business.

But in order to thrive in today’s landscape, you need online visibility and search engine results from SEO friendly blog posts, Google Ads, expert web design and local SEO.

The best way to generate online visibility is through a San Diego search engine optimization (SEO) strategy.

robots.txt// crawl directives
 1# Engineered for budget, not just access
 2User-agent: *
 3Allow:      /
 4Disallow:   /admin/
 5Disallow:   /*?session=
 6 
 7User-agent: GPTBot
 8Allow:      /
 9 
10Sitemap: /sitemap_index.xml

On Page SEO

It’s not the most fun part of SEO, but backend aspects like HTML, meta description, tags, and other dev features must be addressed before any of the surface details can be taken care of.

lighthouse-report.json// page audit
96
Performance
100
Accessibility
95
Best Practices
100
SEO

Keyword Research

At the heart of any good SEO strategy is a sound keyword strategy derived from expert keyword research. We engage client target keywords for national & local businesses alike.

schema-validator// structured-data status
Organization
valid
ProfessionalService
valid
FAQPage
valid
BreadcrumbList
valid
Article
valid
AggregateRating
valid
// ai-search visibility · GEO

Ranking is no longer just Google.

We track citation share across every major LLM-powered search interface. Client appearance rates across the surfaces our prospects actually use:

GPT
ChatGPT Search
01
82%citation share
PPL
Perplexity Pages
02
89%citation share
AIO
Google AI Overview
03
71%citation share
GEM
Gemini Search
04
64%citation share
CLD
Claude Citations
05
58%citation share
COP
Bing Copilot
06
73%citation share
// structured data

Schema-first because Google reads JSON, not paragraphs.

Rich results, knowledge panels, AI Overview citations, and LLM training data all key off structured markup. We deploy validated JSON-LD across every page, monitored for drift.

  • ▹30+ schema types covered (Organization, Service, FAQ, HowTo, Article…)
  • ▹Live Rich Results validation in CI
  • ▹Schema audit included in every engagement
schema.json
 1{
 2  "@context": "https://schema.org",
 3  "@type": "ProfessionalService",
 4  "name": "SEO.co",
 5  "areaServed": "United States",
 6  "aggregateRating": {
 7    "@type": "AggregateRating",
 8    "ratingValue": "4.9",
 9    "reviewCount": "312"
10  }
11}

Content Creation

Armed with good keywords, you can create content that resonates with your target readers and makes them more likely to purchase your products or follow through on specific calls-to-action.
gsc-coverage// index coverage · 30d
Indexed
1,842
Discovered
117
Excluded
28
Error
9

Link Building

Good content should attract good links. But sometimes you have to go out and manually build these links to jumpstart the process. Doing so in a strategic manner will ensure you play within the rules.

keyword-clusters.csv// cluster intent
technical seo audit4.4K/mo
KD 38
core web vitals optimization1.9K/mo
KD 24
schema markup implementation2.7K/mo
KD 31
internal linking strategy3.1K/mo
KD 42
site speed optimization8.8K/mo
KD 55

Google Analytics

Finally, you can’t have a strong SEO presence if you aren’t actively tracking the data and studying the analytics and metrics. This will tell you what works so that you can pivot and iterate.

robots.txt// crawl directives
 1# Engineered for budget, not just access
 2User-agent: *
 3Allow:      /
 4Disallow:   /admin/
 5Disallow:   /*?session=
 6 
 7User-agent: GPTBot
 8Allow:      /
 9 
10Sitemap: /sitemap_index.xml
// core web vitals · field data

Page speed is a ranking signal. We engineer it like one.

Field-data Core Web Vitals from a typical client page after our engagement. Real users, real conditions, measured against Google's thresholds.

Good · 90+
Needs work · 50–89
Largest Contentful Paint
LCP
1.8s
score 94
Cumulative Layout Shift
CLS
0.03
score 98
Interaction to Next Paint
INP
120ms
score 91
// the difference

What “technical” actually means.

Capability
SEO.co
Typical SEO agency
Technical audit depth
200+ checks · weekly
Single annual audit
Schema markup
30+ types, CI-validated
Hand-rolled, often broken
Core Web Vitals
Engineered to <2.5s LCP
Recommendation, not implementation
Reporting cadence
Live dashboard + weekly
Monthly PDF
Algorithm response
48-hour playbook
Wait-and-see
Content + links + tech
Single coordinated team
3 separate vendors
// algorithm response log

Every algorithm update has a playbook.

We don't wait-and-see. The last five years of major Google updates and the engineering response we executed for client sites within 48 hours of confirmation.

  1. 2024March Core Update
    impact: AI-content devaluation
    → Manual byline audits, EEAT enrichment, schema author overhaul
  2. 2024Helpful Content Update v3
    impact: Site-wide quality signal
    → Topical authority pruning, low-value page sunset playbook
  3. 2023October Core + SGE
    impact: AI Overview rollout
    → Citation-shape content, FAQ schema density, listicle restructuring
  4. 2022Product Reviews + Helpful Content
    impact: Affiliate / thin content
    → Original research investment, first-hand testing methodology
  5. 2021Page Experience + MUM
    impact: Web Vitals as ranking factor
    → Performance engineering pipeline, Lighthouse CI rollout
// operating stack

The platforms we run.

Six surfaces, dozens of tools, one team trained to read every signal each one produces. We don't pick favorites — we instrument everything.

Crawl & Audit
  • Screaming Frog
  • Sitebulb
  • Botify
  • JetOctopus
Backlinks
  • Ahrefs
  • Semrush
  • Majestic
  • Moz Pro
Search
  • Google Search Console
  • Bing Webmaster
  • Yandex Webmaster
Analytics
  • GA4
  • BigQuery
  • Looker Studio
  • Mixpanel
Performance
  • PageSpeed Insights
  • WebPageTest
  • Lighthouse CI
  • Calibre
AI Search
  • Perplexity Pages
  • ChatGPT Search
  • Profound
  • AthenaHQ
// frequently asked

Common questions

01On-page Analysis.
By analyzing individual pages and keywords using Google Analytics, Google Search Console (reviewing accelerated mobile pages), Core Web Vitals (reviewing page speed) and other keyword research tools, we create a detailed roadmap that is industry agnostic and fully-repeatable for ranking in search engines.
02Complete Content Audit.
Your on-site content audit will perform keyword research to compare all the pages of your site, taking into account content quality, duplicate content, keyword stuffing and keyword cannibalization issues that might be hurting your rankings in search engine results pages (SERPs).
03Holistic Backlink Audit.
Understand impact of site-wide and individual web pages with a comprehensive look at backlink diversity, link velocity, anchor text variability, TLD diversity, internal links and internal link structure.
04Determine Link-Worthy Assets.
We find the best content assets on your website, worthy of inbound mentions and backlinks. If you don't have any or your content is lacking, our editorial team can help to beef-up your content assets.
05Find Publishers that Match Your Strategy.
We source publishers with relevance and authority and pitch them content ideas that include backlinks and references back to your website.
06Write The Content.
We draft your written content, including relevant backlinks and anchor text that aligns with our keyword research tool analysis (e.g. title tags, meta tags, keyword density, etc.). We then get publisher approval to get the content published.
07Backlink Reporting.
You receive regular backlink reports included in your standard monthly SEO work reports.
// nationwide coverage

Other cities we serve

// ready to engage

Ready to rank in San Diego?

Get a city-specific proposal from the team that's engineered top rankings in San Diego and 40+ other US cities.

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