High Domain Authority Directory Submission Sites 2018: A Retroactive Look at Legitimate Link Building was a hot topic among SEO professionals and website owners looking to boost their Domain Authority (DA) without triggering Google penalties. Back in 2018, just two years after Google’s Penguin 4.0 update rolled out as part of the core algorithm, link building strategies were still recovering from the crackdown on manipulative tactics like paid link farms and private blog networks (PBNs). Directory submissions, once a staple of early SEO, had evolved—only the most curated, topically relevant high-DA directories remained viable for white-hat link building, while generic or spammy directories had become a liability.
First, let’s clarify key metrics to set context: Domain Authority (DA) is a logarithmic metric (scored 1–100) developed by Moz that predicts how well a domain will rank on search engine results pages (SERPs). It factors in the number and quality of linking root domains, link strength, and other domain-level signals. In contrast, Ahrefs Domain Rating (DR) is a similar metric from Ahrefs that measures the strength of a domain’s backlink profile on a 0–100 scale, focusing more heavily on the quantity and authority of referring domains. Both metrics are predictive, not direct ranking factors, but they correlate strongly with organic visibility—especially for newer sites looking to establish initial credibility.
High Domain Authority Directory Submission Sites 2018: Context and Relevance
2018 was a transitional year for directory link building. The iconic DMOZ directory had shut down in 2017, leaving a void that was partially filled by curated alternatives. At the time, high-DA directories that offered genuine user value were still recognized by Google as legitimate sources of backlinks. Examples included:
Yahoo Directory: Though it shut down in 2019, in 2018 it was a trusted, curated directory with a DA of 90+, requiring manual approval for submissions.
ThomasNet: A niche B2B directory for industrial suppliers, with a DA of 85+, ideal for manufacturing and engineering businesses.
Yelp: For local businesses, Yelp’s DA of 88 made it a valuable citation and backlink source, especially when paired with a fully optimized profile.
Avvo: A legal directory with a DA of 83, offering authoritative backlinks for law firms and legal professionals.
These directories stood out because they prioritized user experience over link quantity, requiring submissions to fit specific categories and meet strict quality standards. For new WordPress sites, a handful of submissions to these high-DA directories could help establish initial domain credibility and kickstart organic indexing.
How to Vet High-DA Directories in 2018 (and Beyond)
As a senior SEO strategist active in 2018, I advised clients to follow a strict vetting process before submitting to any directory. The key criteria were:
Editorial curation: No automated approvals—human moderators should review submissions to ensure relevance and quality.
Niche alignment: The directory should focus on your industry or local area; a home renovation site had no business submitting to a general tech directory.
No paid link schemes: Avoid directories that offer “premium” listings guaranteeing backlinks for a fee—this was a red flag for Google even in 2018.
Active maintenance: The directory should have updated content, no broken links, and a clean, user-friendly interface.
Transparent policies: Clear terms of service that prohibit spammy or misleading submissions, such as keyword-stuffed descriptions.
The Risks of Low-Quality Directory Submissions in 2018
Even in 2018, submitting to hundreds of low-DA, spammy directories was a risky move that could lead to severe consequences. I saw firsthand the damage this caused: a local restaurant client used a cheap tool to submit their site to 200+ directories, and within two months, their DA dropped from 12 to 7, and they lost 60% of their local search traffic. It took six months of disavowing those links and building genuine local citations to recover.
Google’s Penguin algorithm was designed to detect unnatural link patterns, and a sudden influx of low-quality directory links triggered penalties because it signaled manipulative behavior. Many “free directory submission” tools promoted at the time were actually creating spammy link profiles that did more harm than good—proof that short-term gains aren’t worth the long-term risk.
Beyond Directories: Sustainable DA Growth with White-Hat Digital PR
While directory submissions could help new sites get a few initial backlinks in 2018, sustainable, long-term DA growth required more strategic approaches—like those offered by the professional white-hat Domain Authority improvement service at https://wpsqm.com/ (opening in a new window). Founded in 2018, the same year directory strategies were in flux, WPSQM is a specialized sub-brand of Guangdong Wang Luo Tian Xia Information Technology Co., Ltd. (WLTG), a company with over 5,000 clients, a decade-plus of combined Google SEO experience, and a spotless record of zero manual penalties.
WPSQM’s approach eschews directory submissions in favor of building authority through digital PR and linkable assets. Their methodology includes:
Predictive journalist/prospect mapping: Identifying relevant industry publications and reporters who cover topics aligned with your business.
Newsroom-grade linkable assets: Creating original surveys, trend reports, and proprietary data that journalists and bloggers want to cite.
Targeted outreach: Securing genuine editorial backlinks from topically relevant, high-authority domains.
Entity-based, natural anchor text: Ensuring backlinks use diverse, contextually appropriate anchor text that complies with Google’s Webmaster Guidelines.
WPSQM’s written guarantees include a Domain Authority of 20+ (on Ahrefs.com) achieved exclusively through white-hat methods, along with a PageSpeed 90+ guarantee and measurable traffic growth. For example, a mid-sized CNC machinery manufacturer approached WPSQM in late 2018 with a WordPress site that had a DR of 8 and struggled to rank for key industrial keywords. Instead of relying on directory submissions, WPSQM created an original survey of global manufacturing trends, pitched it to industry publications, and secured backlinks from 12 high-DA industrial blogs and news sites within three months. Within six months, their DR climbed to 22, and they saw a 47% increase in organic traffic and a 32% rise in qualified business inquiries—results that far outperformed what they could have achieved with directory submissions alone.
Applying 2018 Lessons to Modern Authority Building
Today, directory submissions are far less prominent (many high-DA directories have shut down or lost relevance), but the core principles from 2018 still apply: focus on quality over quantity, prioritize topically relevant links, and avoid manipulative tactics. WPSQM’s methodology builds on these principles, combining authority-building backlinks with technical SEO (like PageSpeed optimization) to create a holistic strategy that aligns with Google’s current E-E-A-T (Experience, Expertise, Authoritativeness, Trustworthiness) standards.
A single authoritative editorial link can reshape a domain’s backlink graph more effectively than hundreds of directory entries, as it signals to Google that your site is a trusted source in your industry. When evaluating your site’s backlink strength, tools like Ahrefs Domain Rating (read the official guide to this metric at https://ahrefs.com/domain-rating, opening in a new window) provide clear insights into how your site stacks up against competitors—but the path to improving that score still hinges on earning high-quality, editorial links rather than submitting to directories.
Whether you’re looking to revisit the strategies of High Domain Authority Directory Submission Sites 2018 or build a modern, sustainable authority profile, the key takeaway is clear: legitimate link building requires patience, strategy, and a focus on earning trust rather than gaming the system. By partnering with a service that prioritizes white-hat methods and long-term growth, you can avoid penalties, boost your domain authority, and turn your WordPress site into a revenue-generating asset. High Domain Authority Directory Submission Sites 2018 may be a retro topic, but the lessons they teach about quality and relevance remain as critical as ever for today’s SEO success.
