SoundThinking, Inc. (SSTI)

In the mid-1990s, physicist Dr. Robert Showen worked at Stanford Research Institute applying acoustic principles to earthquake prediction. After hearing gunshots fired in a nearby neighbourhood, he recognised that the same sound-wave analysis used to detect seismic events could precisely locate gunfire. He joined with fellow engineers Dr. Robert Calhoun and Jason Dunham to pursue the idea, and in 1996 they founded what would become SoundThinking, Inc. — a company born from the insight that the same mathematics that localise earthquakes can pinpoint the discharge of a firearm in an urban setting.

The early years were a slow climb. The technology worked in prototype, but deploying an acoustic detection network across a city required sustained capital, relationships with police departments cautious of new tools, and permission to install sensors on buildings and utility poles. Over the first fifteen years, the team bootstrapped and raised funding to test the system in about twenty cities. Police departments began to see value in the real-time notification of gunfire incidents, which allowed officers to respond faster and to focus intelligence on the places where shots were most frequent. The system worked best in dense urban areas where building geometry amplified sound signatures, and early adopters tended to be departments in major metropolitan areas facing persistent gun violence.

The transformation under Ralph Clark

In the early 2010s, the company underwent a structural shift under new CEO Ralph Clark. The turning point was a recognition that the core technology — gunshot detection — was proving valuable, but the business model needed to change. The company moved from a capital-intensive, one-time-sale model (selling cities expensive sensor networks) to a recurring subscription model. Customers now paid annual or multi-year fees for the service, aligning incentives and creating predictable revenue streams. At the same time, the company invested in building its own Incident Review Center — a team of human analysts who work alongside the acoustic software to verify detections, filter out false positives from fireworks or construction, and provide context to police departments. This human layer, paired with algorithmic precision, became the competitive advantage.

The company also established a dedicated customer success function, meaning every police department had a named contact and regular touchpoints to ensure the technology was well-integrated into their operations. By 2017, having proven the subscription model and assembled a professional organisation, the company went public on NASDAQ under the ticker SSTI. The initial public offering validated the business: investors saw recurring revenue, high customer retention, and expanding markets.

Expansion and rebranding

Through the late 2010s and early 2020s, SoundThinking (then still trading as ShotSpotter) expanded its presence. By 2019 the customer base had reached one hundred law enforcement agencies. The company launched a Data for Good programme, offering its services free or at reduced cost to departments in under-resourced neighbourhoods, which extended reach and built reputational capital. The core product — ShotSpotter gunshot detection — achieved a 99% customer retention rate, a remarkable statistic that signalled deep satisfaction among police departments.

In 2023, the company announced a strategic rebrand from ShotSpotter to SoundThinking, reflecting an evolution beyond gunshot detection alone. The new identity coincided with the launch of the SafetySmart Platform, an integrated suite of law enforcement tools. The platform bundles gunshot detection with CrimeTracer, a data analytics and case management system that helps agencies analyse crime patterns and manage investigations. It incorporates weapons detection capabilities and integrates with existing police records systems, allowing departments to work within a single interface rather than juggling multiple vendor platforms.

How the business generates revenue

SoundThinking’s revenue streams centre on subscriptions. Police departments and campus security operations contract for multi-year access to the gunshot detection network and associated software, with pricing typically based on the area of coverage, the number of officers who use the system, and the suite of tools included. The shift to a subscription model meant that revenue became recurring and predictable, a trait that financial markets reward because it reduces the uncertainty of future earnings and cash flow.

Beyond the core subscription, the company generates additional revenue from professional services — customisation, integration with existing systems, and training of department personnel — and from data and intelligence products that help agencies understand crime trends in their jurisdictions. As the SafetySmart Platform expands beyond gunshot detection, the company is positioned to cross-sell additional modules to existing customers.

Scale and customer base

As of late 2025, SoundThinking served approximately 300 law enforcement customers and over 2,100 individual agencies across roughly 170 cities in North America, with coverage contracted for more than 1,000 square miles of urban and suburban territory. The company also serves corporate and campus security operations, including university police and corporate security departments. The large number of agencies per customer reflects the reality that many contracts involve regional or state-level agreements covering multiple departments.

Competitive dynamics and risks

SoundThinking faces competition from other gunshot detection vendors and from the simple reality that many police departments use traditional methods — radio dispatch, community reporting, and patrol presence — to respond to gunfire incidents. Some departments question the accuracy of acoustic systems, and occasional false positives or missed detections generate criticism. The company must also contend with changing political winds around policing and public safety. When local governments reduce police budgets or face pressure to defund certain programmes, gunshot detection systems are sometimes targeted for cost-cutting. Additionally, as the company expands into broader crime analytics and case management, it competes against entrenched software vendors and faces the challenge of integration with legacy systems that many departments still use.

How to research SoundThinking

Prospective investors should begin with the company’s annual 10-K filing (SEC CIK 0001351636), which breaks down revenue by customer segment, describes the technology and its limitations, and lays out risk factors including customer concentration, regulatory changes, and the company’s dependence on continued adoption of its platform. Quarterly earnings calls provide colour on customer wins, churn, and the adoption rate of newer products like CrimeTracer. Watch the trajectory of customer count and the average revenue per customer to gauge whether the company is expanding its foothold or facing headwinds. The historical shift from transactional sales to subscription revenue is a model change that has already proved stable; the next inflection point will be whether the SafetySmart Platform’s newer products gain material traction and diversify revenue beyond gunshot detection.