Here are Texas-based SEO/marketing firms that explicitly offer content marketing focused on attorneys / law firms, with a short note on what they do and a source for each:

• Thrive Internet Marketing Agency (Arlington) — full-service digital agency that lists SEO and content writing among its services and serves professional clients; commonly hired by law firms for content-driven SEO. (en.wikipedia.org)

• Rock Candy Media (Austin) — Austin digital agency offering SEO and content services; its online-marketing division includes content and SEO services used by professional-service clients. (en.wikipedia.org)

• Telligent Marketing (Texas Attorney SEO) — explicitly markets “Attorney SEO Texas” and describes content / SEO programs tailored to Texas law firms. (telligentmarketing.com)

• 360 Law Firm Marketer (Texas-focused law‑firm marketing) — positions itself as a law-firm marketing agency and advertises law-firm content marketing (blogs, practice-area pages, case studies) for Texas firms. (360lawfirmmarketer.com)

• Ozment Media (Dallas area) — advertises dedicated “law firm SEO” and related content, maps, and blog services for Dallas–Fort Worth attorneys. (ozmentmedia.com)

• iLawyerMarketing / Internet Marketing for Lawyers (Dallas) — advertises attorney SEO and content services (blog posts, practice-area pages, conversion content) for Dallas law firms. (iLawyerMarketing.com)

• Inherent, Inc. (serves Texas law firms) — describes law-firm content marketing strategies (practice pages, blogs, guides) specifically for Texas firms. (inherent.com)

• Local/specialist consultancies (examples) — many smaller Texas shops and consultants explicitly market “Attorney SEO” (examples include boutique firms and solo consultants listed on local pages); if you want, I can compile a longer list of such specialists in specific Texas cities. (telligentmarketing.com)

If you’d like, I can:

• narrow this to firms in a specific Texas city (Austin, Dallas, Houston, San Antonio), or
• show client examples/case studies for any of the agencies above, or
• compare pricing / typical deliverables for content marketing packages targeted at attorneys.