Thompson Street Backs Karpel in Push to Modernize Courts

Thompson Street Capital Partners closed a growth investment in Karpel Solutions this week, backing a company that's been quietly digitizing America's courts for four decades while most of the legal system still runs on paper and Excel spreadsheets.

The St. Louis-based private equity firm didn't disclose deal terms, but the investment marks a bet that courts—historically among the slowest technology adopters in government—are finally ready to modernize at scale. Karpel's software now serves more than 1,500 courts, prosecutor offices, and public defender agencies across all 50 states, managing everything from case filings to evidence tracking to court calendars.

What makes the deal notable isn't just the capital injection. It's the timing. Court digitization stalled for years as budgets shrank and legacy systems calcified. Then the pandemic forced remote hearings overnight, exposing just how archaic most case management infrastructure really was. Now, with federal and state funding flowing toward modernization initiatives, companies like Karpel are positioned to capture what analysts estimate is a $3.8 billion market opportunity in legal case management software through 2030.

Thompson Street sees this as a classic infrastructure play in an overlooked corner of government tech. The firm specializes in B2B software and tech-enabled services, typically writing checks between $25 million and $150 million for companies generating $10 million to $100 million in revenue. Karpel fits the profile: established customer base, recurring revenue model, fragmented market with low software penetration, and a product that solves a genuine pain point rather than a nice-to-have feature.

Karpel's KarpelCM platform handles the operational backbone of courts and prosecution offices: case intake, document management, scheduling, evidence logs, financial tracking, and reporting. For municipal and county courts especially, it's often the first true case management system they've ever used—replacing literal filing cabinets, Word documents saved to shared drives, and the clerk who knows where everything is because she's been there 30 years.

The company's software isn't flashy. It's designed for the people who actually use it—clerks, paralegals, prosecutors, public defenders—not for the judges who occasionally log in. That utilitarian focus has made Karpel sticky. Once a court migrates its case data into the system, switching costs are high. Not just financially, but operationally. Training staff on a new platform, migrating decades of records, and maintaining compliance with state-specific court rules makes vendor changes painful.

The company also built integrations that matter: connections to state criminal databases, e-filing portals, payment processors, and document management systems. Courts don't want to cobble together five different vendors. They want one system that works, doesn't crash, and lets them answer the question "Where is this case?" in under 30 seconds.

That's harder than it sounds when you're dealing with 50 different state court systems, each with its own rules, forms, and data standards. Karpel's been doing it since 1987, which means it's already navigated the compliance landmines that would trip up a younger competitor.

Legal tech gets attention when it's consumer-facing—LegalZoom, Rocket Lawyer, contract automation for corporate legal departments. The infrastructure layer that powers actual courts? Less so. But it's a more predictable business. Courts and prosecutors don't churn. They don't cancel subscriptions because budget got tight. They pay, year after year, because the system has to work. Justice systems don't exactly have the luxury of downtime.

The market for court case management software is fragmented. Tyler Technologies dominates at the state and large county level with its Odyssey platform. Then there's a long tail of regional players, legacy systems built in-house by IT departments in the 1990s, and still-functional DOS-era software that nobody dares touch. Karpel competes in the mid-market and below—municipal courts, county courts, smaller prosecutor offices—where Tyler's enterprise pricing doesn't make sense and in-house systems have finally hit end-of-life.

Thompson Street's investment thesis likely hinges on roll-up potential. The fragmented vendor landscape, combined with a wave of modernization spending, creates an opportunity to consolidate smaller players and grow organically as courts replace legacy systems. The firm has done this before in other government and institutional software verticals—invest in a platform, add features, acquire competitors, expand the customer base.

What's notable is how little venture capital has flowed into this space. Courts are slow buyers, procurement cycles are long, and the sales process involves navigating county commissioners and state budget committees. That's not the growth trajectory VCs want. But it's exactly the kind of steady, recurring, hard-to-disrupt business that growth equity firms love.

Before COVID-19, court digitization was a multi-year planning process. Budget proposals. RFPs. Vendor evaluations. Pilot programs. By the time a decision got made, the committee had changed and the budget had evaporated. Then the pandemic hit, and courts that couldn't hold remote hearings effectively shut down. Case backlogs exploded. The usual "we'll get to it eventually" approach to modernization became untenable.

Thompson Street Capital Partners operates in a narrow band of the private equity spectrum. The firm doesn't do leveraged buyouts of struggling businesses. It doesn't do venture-style moonshots. It invests growth capital—typically minority stakes—in profitable, founder-led B2B companies that need capital to scale but don't want to sell outright or take on heavy debt loads.

That structure matters for a company like Karpel. Courts and prosecutors aren't going to trust mission-critical software to a company that just got flipped in a debt-heavy LBO. They want stability. They want a vendor that'll answer the phone in five years when something breaks. Thompson Street's growth equity model lets Karpel's management stay involved, maintain operational continuity, and invest in product development without the pressure of a three-year exit clock.

The firm's portfolio includes other government and institutional software companies, though it doesn't disclose most holdings publicly. Its strategy across these deals tends to follow a pattern: invest in companies with strong customer retention, recurring revenue, and opportunities to expand through new features, adjacent markets, or acquisitions. Then provide capital and operational support to accelerate growth that was already happening—just slower.

For Karpel, that likely means a few things. First, expanding the product suite—adding features for specialty courts (drug courts, mental health courts, veterans courts) that have unique case management needs. Second, deeper integrations with adjacent systems—think e-filing portals, state criminal databases, financial management software. Third, moving upmarket into larger counties and state-level agencies that historically went with Tyler but are now more price-sensitive.

And fourth—though neither party said it explicitly—potential acquisitions. The legal case management space has dozens of small, regional players serving 50-200 courts each. Many are owned by founders nearing retirement with no succession plan. Roll-up opportunities abound for a buyer with capital and a platform to migrate customers onto.

One reason Thompson Street's model works in government software is that these businesses don't need to burn cash to grow. Karpel isn't fighting for consumer attention or competing on ad spend. It's selling into a defined universe of potential customers—there are only so many courts in the U.S.—and growth comes from replacing legacy systems, expanding within existing customers, and winning competitive displacements.

That means the capital raised in this investment likely goes toward product development, customer success teams, and potentially M&A—not toward subsidizing growth at any cost. Courts care about reliability, compliance, and support quality. They don't care if your company just raised a $100 million Series C. The sales motion is fundamentally different from SaaS companies selling to enterprises, and it requires a different capital strategy.

The Karpel investment is part of a broader trend: private equity firms are paying attention to the boring, essential infrastructure of legal and government systems. Not the flashy stuff—AI legal research, contract automation, litigation analytics—but the systems that make courts and legal agencies actually function day to day.

This shift reflects a recognition that the modernization wave in government tech isn't just about replacing old software with new software. It's about replacing systems that were never really "systems" to begin with—paper processes, manual workflows, institutional knowledge locked in people's heads. The TAM for that replacement cycle is massive, the switching costs are high once you're in, and the competitive dynamics favor established players who've already navigated compliance and integration challenges.

Tyler Technologies has captured the high end of that market with its Odyssey platform, but Tyler's average deal size and implementation complexity create an opening below. That's where Karpel lives—and where Thompson Street is betting growth will come from.

The other signal is about founder liquidity without full exits. Thompson Street's growth equity model allows founders and early stakeholders to take some chips off the table while staying involved in the business. For companies serving risk-averse customers like courts, that continuity matters. It also means private equity is finding ways to deploy capital into founder-led businesses that wouldn't fit a traditional buyout or venture profile.

The hard part for Karpel—and for Thompson Street—comes after the deal closes. Courts are notoriously difficult customers. They move slowly. They have limited IT resources. They face intense public scrutiny when systems fail. And they operate under budget constraints that make every software purchase a multi-year commitment.

That means Karpel's growth strategy can't be "move fast and break things." It has to be methodical. Each new feature has to work across jurisdictions with different rules. Each integration has to be rock-solid before it gets rolled out broadly. Each customer implementation has to be white-glove, because one botched migration can tank the company's reputation in a small, interconnected market.

Thompson Street's value-add will likely come through operational support—helping Karpel build out a sales team, professionalize customer success, and create the internal infrastructure to support faster growth without sacrificing reliability. That's less sexy than product innovation, but it's what determines whether a mid-market software company can scale or hits a growth ceiling.

The firm will also bring M&A expertise if Karpel pursues acquisitions. Buying a competitor is straightforward. Migrating their customers onto your platform without disrupting service, retaining their team, and integrating their contracts and compliance obligations—that's where deals fall apart. Thompson Street has done this before in adjacent verticals, which matters more than generic PE playbook advice.

The uncomfortable truth about court technology is that software is only part of the problem. The bigger barriers are organizational: understaffed IT departments, resistance to change from longtime employees, political dynamics between elected officials and court administrators, and budget processes that make multi-year software investments difficult to approve.

Karpel's software works. But whether courts can actually adopt it at scale depends on factors the company can't control—state funding decisions, county budget priorities, leadership turnover, and the willingness of court staff to embrace new workflows. The pandemic created urgency, and federal recovery funds created budget capacity. Both of those tailwinds are fading.

That's the risk in this deal. If court modernization stalls again—if budgets tighten, if the sense of urgency dissipates, if courts revert to "good enough" legacy systems—then Karpel's growth projections get harder to hit. Thompson Street is betting that the shift toward digital court operations is irreversible, that the systems implemented during the pandemic become the new baseline, and that courts won't go backward.

That's probably the right bet. Once a court has experienced remote hearings, digital case files, and automated scheduling, going back to paper and Excel feels archaic. The question isn't whether courts will modernize. It's how fast, and who captures that spending.

Whether Karpel starts making acquisitions in the next 12-18 months. If Thompson Street's thesis is about consolidating a fragmented market, deals should follow. If they don't, it suggests the integration risk or valuation expectations are higher than anticipated.

Product expansion into adjacent verticals—particularly public defenders and legal aid organizations. Both groups need case management software, both are chronically underfunded, and both face similar workflow challenges as prosecutors. If Karpel can adapt its platform for defense-side work, it doubles its addressable market.

How Tyler Technologies responds. The market leader has the resources to move downmarket if mid-sized courts become a meaningful growth driver. If Tyler starts offering more competitive pricing or lighter-weight implementations, Karpel's growth gets harder.

State and federal funding for court modernization. The next 24 months will show whether the post-pandemic investment in court technology was a one-time surge or a sustained trend. If funding dries up, sales cycles lengthen and deal sizes shrink.