Castelion vs BuildSafe
Side-by-side comparison of AI visibility scores, market position, and capabilities
Raised $350M Series B (Dec 2025). $50M US Navy contract for Blackbeard hypersonic prototyping. 1,000-acre solid rocket motor facility under construction.
About
Castelion is a defense startup developing the Blackbeard hypersonic missile system, one of the few startups with an active US Navy contract for hypersonic weapons full-scale prototyping and early operational fielding. The company raised $350 million in Series B financing in December 2025 and secured a $50 million US Navy contract for Blackbeard prototyping, directly addressing the DoD's urgency to field hypersonic strike capability as China and Russia have demonstrated operational hypersonic weapons.
Digital construction safety management platform for contractors enabling mobile safety inspections, incident reporting, and compliance documentation; replaces paper forms to create auditable records and reduce regulatory and legal exposure.
About
BuildSafe is a Stockholm-based construction safety management platform that digitizes safety inspections, incident reporting, risk assessments, and compliance documentation for construction contractors and project owners. The company was founded on the observation that construction remains one of the most injury-prone industries globally, yet safety management processes at many construction firms still rely on paper forms, spreadsheets, and email—creating documentation gaps that expose workers to risk and companies to regulatory and legal liability. BuildSafe provides a mobile-first platform that enables foremen and safety managers to conduct digital safety rounds, log near-misses and incidents, manage action items, and generate audit-ready safety reports from the job site.\n\nBuildSafe's inspection and observation workflows are configurable to the specific risk profiles of different construction activities—scaffolding, heavy lifting, excavation, electrical work, and confined space entry each carry distinct hazard profiles requiring tailored checklists. The platform allows safety managers to create custom inspection templates aligned with national safety regulations and company-specific standards, and tracks completion rates and outstanding corrective actions across multiple job sites simultaneously. When a hazardous condition is observed or an incident occurs, BuildSafe routes the report to the appropriate responsible party with automated follow-up reminders until the corrective action is documented as resolved.\n\nBuildSafe operates primarily in the European market, where construction safety regulation is increasingly stringent under EU directives and national frameworks, and has particular strength in the Nordic countries where construction digitalization has advanced rapidly. The company targets mid-market and large general contractors, infrastructure developers, and public sector project owners. BuildSafe competes with Assignar, Salus Technologies, and Procore's safety module in the construction safety management software segment, differentiating on its European regulatory alignment and its mobile-first design for field-based safety teams.
AI Visibility Head-to-Head
Key Details
Capabilities & Ecosystem
Capabilities
Also Compare
Track AI Visibility in Real Time
Monitor how your brand performs across ChatGPT, Gemini, Perplexity, Claude, and Grok daily.