Geology is software for AI visibility, Hennessey Digital is Jason Hennessey's agency that runs SEO retainers for law firms, and the two solve different problems. Geology fits in-house teams (legal, B2B, mid-market) that want cross-platform measurement plus execution for AI answer engines. Hennessey Digital fits law firms that want a vertical specialist to own their SEO program, content, and link work as a managed service. They overlap on the SEO line, not on AI answer engines, and the buying motion is different.
At a glance
| Dimension | Geology | Hennessey Digital |
|---|---|---|
| Best for | In-house teams shipping AI visibility work | Law firms outsourcing the full SEO program |
| AI platforms tracked | ChatGPT, Perplexity, Gemini, Copilot, Google AI Overviews | Traditional SEO focus, AI tracking limited |
| Execution support | Yes. Page audits, prompt monitoring, content briefs, agentic optimization | Yes. Senior strategist plus content and link teams |
| Pricing model | Subscription, transparent | Custom monthly retainer, sales-led |
| Time to first insight | Same-day audit | Onboarding cycle (typically 4 to 8 weeks) |
| Reporting | Self-serve dashboard plus exports | Monthly reports via account lead |
| Best paired with | A marketer who owns the roadmap | A firm without an in-house marketing function |
What Hennessey Digital does
Hennessey Digital is a US agency founded by Jason Hennessey, a long-time SEO and the author of Law Firm SEO. The pitch on hennessey.com is vertical specialization: technical SEO, content, and link work for law firms, with case studies focused on personal injury, mass tort, and family law practices. Engagements are monthly retainers with a strategist, technical lead, content team, and link team assigned to the account. The agency has built a reputation on detailed technical audits and aggressive content programs that target high-intent keywords like car accident lawyer in dense local SERPs. AI search optimization is part of the conversation, but the core deliverable is still ranking growth and qualified case volume from organic.
What Geology does differently
Geology is built for the AI answer layer first, not retrofitted from a traditional SEO playbook. The platform measures how a brand appears across ChatGPT, Perplexity, Gemini, Copilot, and Google AI Overviews, then connects that data to execution. Page audits flag URLs an AI is misreading, prompt management captures the queries your buyers (or potential clients) actually run in answer engines, and content briefs translate gaps into work your team can ship the same week. An agentic optimization layer applies repetitive fixes like schema, FAQ structure, and internal linking automatically. The point of difference against a vertical retainer is the execution loop. Software validates and ships the mechanical work continuously, which means more pages cleaned per quarter and a tight feedback loop on AI citation specifically.
Pricing
Hennessey Digital runs custom monthly retainers, typically priced for law firm marketing budgets in the mid five figures and up. Geology is a transparent subscription with published tiers and no procurement cycle. For a firm that wants to test AI visibility execution without a long retainer commitment, a Geology subscription is a fraction of a vertical agency engagement.
When Hennessey Digital wins
If you run a law firm with no in-house marketing team and you want a vertical specialist who knows the SERP and the regulatory edges of legal advertising, Hennessey is the right shape of partner. The depth of niche knowledge and the maturity of the program are real advantages.
When Geology wins
If you have someone owning marketing and you want to compress the cost and cycle of AI visibility work, Geology is the better fit. You get cross-platform measurement plus an execution layer that handles the repetitive optimization, so your team or fractional partner can spend their hours on strategy, content, and the things that need a human.