He Turned a Conference Talk Into a $20 Million Legal SEO Agency

Where He Started

Jason taught himself SEO out of necessity, building a website for a mobile DJ company he ran in college. Fast-forward to 2008: he was living in Atlanta and got asked to speak at a conference about this thing called SEO, which was still fairly new. He talked about how he’d ranked for keywords in the wedding industry.

Seven attorneys were in the room. They came up to him afterward and said some version of the same thing: they were paying an SEO guy $7,000 a month who wasn’t doing any of what Jason had just described, and did he do consulting? He left with about eight business cards. Those turned into roughly $35,000 in recurring revenue, and that was the genesis of what became Hennessey Digital.

He hadn’t chosen legal on purpose. “If I would’ve spoken at a plumbing conference, I might be working with plumbers right now,” he said. But once the first clients were lawyers, they introduced him to colleagues, told him which conferences to attend, and the niche compounded on itself.

His approach to the very first client at his new agency (after selling a prior agency, Eversparks Interactive) set the tone for everything after. He mailed a physical pamphlet called “The SEO Blueprint” to 50 attorneys, comparing their traffic and site value to their competitors’. Five responded. Five meetings turned into one client. Instead of the going rate of $5,000 a month, he proposed $15,000 a month, specifically so he’d have the budget and manpower to get a result big enough to build a real case study. It worked, and that one case study became the leverage he used to sign the next round of clients at premium prices.

Scaling the Machine

Today Hennessey Digital’s packages start around $8,500 a month and run past $100,000 a month for the largest clients, broken into strategy, technical SEO, content, link building, digital PR, and local SEO. Most clients are personal injury lawyers specifically, because those firms carry high margins, big advertising budgets, and operate on contingency, so a new lead doesn’t require the prospect to pull out a credit card.

Authority did the heavy lifting on lead generation. Jason published a book, Law Firm SEO, by design, so that a Google search for the term would surface a knowledge panel he didn’t have to pay for while competitors bid $40 to $50 a click on the same keyword. The agency now mails a few hundred physical copies of the book every month for free, promoted through Facebook ads, and converts a meaningful share of the people who read it on a plane.

The growth inflection came at roughly $3.5 to $4 million in revenue. That’s when Jason brought in two salespeople, Rob and Brian, so he could stop being the agency’s only closer. Around the same time he hired a COO, a CFO, and a consultant, Cameron Herold. With that team in place, the agency went from $4 million to $8 million in a single year.

That’s the honest part of the story. Growing that fast meant payroll, executives, and middle management stacking up faster than revenue could absorb them. At one point margins fell to around seven percent, which Jason calls a real red flag. The agency had two full-time recruiters hiring aggressively, to the point that if a department head asked for one new hire, the answer was often “here’s three.” Eventually the team put real budgets in place and got disciplined about doing more with less. Jason is direct about the tradeoff: going from ten million to twenty million was, in his experience, easier than going from one million to ten, because that’s the stage where the operational infrastructure either gets built or the growth becomes unsustainable.

Retention, Then the Exit

On the client side, Hennessey Digital runs biweekly calls with every account, keeps a “surprise and delight” Slack channel where the team looks for unscheduled wins to share, and gives account managers a budget to do things like send a client’s kid a Disney on Ice package. Jason also credits managing expectations up front, including with a birth injury lead-gen site he built and co-owns with a client, where he was upfront from day one that it would take about $30,000 a month and roughly two years before the first lead arrived.

The exit itself was a deliberate, multi-year strategy rather than an opportunistic sale. Starting in 2024, Hennessey Digital shifted its focus from growth to profitability, pulling back on conferences, dinners, and some marketing spend because EBITDA, not revenue, is what drives a sale price. The plan was to grow EBITDA year over year and consider selling around early 2027. Eight months into that process, a private equity group approached them, and the fit was right on the three things Jason says mattered, in order: was it good for clients, good for the team, and good for him. Hennessey Digital sold with EBITDA just under $5 million, in a market where that range of deal typically commands a five to ten times multiple.

Jason didn’t step away. He’s still CEO of Hennessey Digital and now sits on the board of the parent company, Herringbone Digital, helping identify and acquire other agencies in legal, home services, medical, and dental.