FieldFlo lands $35m to digitize risk and safety for high-risk subcontractors—here’s what’s next

Denver-based project and safety management software developer FieldFlo has raised USD 35 million in growth capital from Mainsail Partners, a private equity firm known for backing vertical SaaS platforms. The investment is expected to accelerate FieldFlo’s product innovation roadmap and help expand its footprint among specialty subcontractors across the United States and Canada.

Founded by Roni Szigeti and Brittany Szigeti—both veterans of the abatement and demolition sector—FieldFlo offers a mobile-first, cloud-based software suite that helps high-risk specialty subcontractors manage safety, project execution, and regulatory compliance. With features such as time tracking, inventory management, incident reporting, and training workflows, FieldFlo is positioning itself as the core digital operating system for subcontractors working in highly regulated environments.

This funding marks a significant milestone for the construction-focused SaaS developer as it continues to digitize legacy safety and compliance practices that remain heavily reliant on spreadsheets and paperwork across the industry.

What industry pain points is FieldFlo addressing with its vertical SaaS platform?

FieldFlo’s value proposition centers on streamlining and digitizing compliance-heavy operations for specialty contractors—firms that face increasing regulatory obligations from agencies such as the Occupational Safety and Health Administration (OSHA), the Environmental Protection Agency (EPA), and various state-level safety boards. These subcontractors often operate in hazardous settings where any lapse in compliance can translate into workplace injuries, insurance claims, legal exposure, or stalled project timelines.

The FieldFlo platform is designed to replace fragmented workflows with an intuitive, mobile-first interface that connects on-site teams with office staff in real-time. The platform includes tools for incident documentation, certifications management, safety training tracking, labour compliance, and verifiable activity logs. Features such as FLŌTime—FieldFlo’s enhanced digital timesheet solution—and the recently launched Safety Academy are examples of how the company is pushing beyond basic reporting toward proactive risk management and digital audit readiness.

By offering a unified compliance and operations platform, FieldFlo enables contractors to stay audit-ready while cutting down on administrative drag, operational risk, and overhead costs.

Why are investors backing vertical SaaS for compliance-heavy contractor segments in 2025?

Mainsail Partners’ investment in FieldFlo highlights a broader trend within growth-stage private equity: backing vertical SaaS platforms that cater to under-digitized, compliance-critical sectors. Specialty subcontracting is one such segment. Despite its exposure to risk and liability, it remains underserved by generic ERP and project management software.

Tollie Brown, Principal at Mainsail Partners, underscored this rationale by noting that most specialty contractors still lack a dedicated system of record tailored to their operational reality. According to Brown, FieldFlo’s platform offers both usability and depth, with workflows that align with how subcontractors actually operate in the field.

In the construction tech space, there is growing investor appetite for solutions that go beyond digitization and into measurable performance improvement. Platforms that offer verifiable labour compliance, safety outcomes, and insurance optimization—such as FieldFlo—are increasingly viewed as enablers of both operational excellence and better financial underwriting.

This category is also gaining momentum as general contractors push for tighter subcontractor oversight, driven by risk-sharing clauses, insurance pooling mandates, and ESG-linked project bidding requirements.

How does FieldFlo differentiate itself from broader construction management platforms?

While the construction tech ecosystem is full of players targeting general contractors or developers with end-to-end project management solutions, FieldFlo has taken a narrow but deep approach—focusing on specialty subcontractors operating in high-risk verticals like abatement, demolition, hazardous materials handling, and industrial services.

This focused strategy allows FieldFlo to build highly specialized workflows, preconfigured compliance templates, and industry-specific training modules that would be considered edge cases by broader construction ERP systems. Its mobile-first design prioritizes field usability, ensuring that documentation and compliance tasks are easily handled on-site rather than retroactively.

FieldFlo also acts as a system of record for safety and compliance data—crucial for insurance negotiations, OSHA audits, and legal defense. This positions it not merely as a workflow tool but as a digital risk mitigation platform that can materially impact contractor profitability and reputational standing.

Institutional observers see this “compliance stack” approach as a key differentiator in a sector where digital transformation has typically lagged and where regulatory exposure is intensifying.

What strategic benefits does the Mainsail Partners deal bring to FieldFlo beyond funding?

In addition to capital, FieldFlo will gain access to Mainsail Partners’ operational expertise through its Growth Team, which supports scaling across product, engineering, customer success, and go-to-market functions. Mainsail has a track record of investing in construction and field service platforms, making it a value-aligned backer for FieldFlo’s next growth phase.

FieldFlo’s leadership believes that the partnership will enhance platform development and talent acquisition efforts. Brittany Szigeti, FieldFlo’s COO, emphasized that the collaboration would enable the company to elevate its field experience and expand both team capabilities and customer reach.

The timing of the deal is also notable. The North American construction market is seeing renewed regulatory scrutiny around worker safety, while infrastructure stimulus programs are driving demand for subcontractor capacity—creating a window for FieldFlo to scale its presence within an expanding market.

How is FieldFlo evolving its product roadmap post-funding?

Product innovation is a major focus of FieldFlo’s near-term strategy. The company is doubling down on features that improve verifiability, audit readiness, and proactive compliance. FLŌTime, for instance, not only tracks labour hours but provides time-stamped proof of activity for union reporting, insurance compliance, and safety benchmarking.

The Safety Academy offers a centralized learning and certification hub for subcontractors to train workers and maintain up-to-date documentation, helping firms meet contractual safety training mandates and reduce onboarding frictions. These modules reflect a shift from reactive compliance to embedded, continuous safety engagement.

FieldFlo is also investing in real-time analytics, cross-team collaboration tools, and deeper integration with payroll and insurance systems. The aim is to become the default safety and compliance operating system for subcontractors, anchoring a suite of services that extend into HR, operations, and risk management.

What should investors and industry observers watch for in FieldFlo’s next chapter?

Over the next 12–18 months, key metrics to track will include FieldFlo’s geographic expansion across North America, its module adoption rates, and any potential moves into adjacent contractor categories or international markets. Given the platform’s architecture, modular monetization strategies could also emerge—including premium analytics, insurance data integrations, and safety benchmarking tools.

With vertical SaaS increasingly favored by institutional investors and M&A activity rising in construction tech, FieldFlo’s growth could attract strategic interest from larger ERP or field management software firms looking to integrate compliance capabilities.

If execution aligns with market demand, FieldFlo may emerge as a category leader in the subcontractor compliance and safety tech niche—a segment ripe for digital disruption and increasingly visible in contractor bid evaluations, insurance policies, and government-funded infrastructure programs.

What are the most important takeaways from FieldFlo’s $35 million growth investment round?

• FieldFlo has secured USD 35 million in growth capital from Mainsail Partners to accelerate its project and safety management platform for specialty subcontractors.
• The funding will support product innovation, including the development of FLŌTime (digital timesheets) and Safety Academy (training and certification suite).
• FieldFlo’s mobile-first SaaS platform replaces paper-based workflows with digital tools tailored for high-risk, compliance-heavy subcontractor segments.
• Investors are backing FieldFlo for its focus on safety, regulatory compliance, and verifiable labour tracking—key pain points in the subcontractor space.
• Mainsail Partners brings domain expertise in construction and vertical SaaS, offering operational support to help FieldFlo scale its team and platform.
• The company is positioning itself as both a core system of record and a digital risk management tool for contractors aiming to reduce insurance claims and improve audit readiness.
• Analysts see the funding as part of a larger trend favoring vertical SaaS firms serving compliance-critical sectors like construction, field services, and infrastructure.
• FieldFlo’s differentiated strategy lies in its deep focus on subcontractor-specific compliance workflows, rather than general contractor ERP tools.
• The company could become an M&A target as construction tech platforms look to expand their compliance capabilities and deepen vertical integration.
• Future developments to watch include geographic expansion, module adoption growth, and potential moves into insurance, payroll, or contractor risk analytics.