Castelion vs Bonterra
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.
Bonterra launched Que, a full agentic AI platform for nonprofits, and acquired CSR platform Deed in March 2026 to dominate the social good software market.
About
Bonterra was formed in 2021 through the consolidation of several leading nonprofit technology companies — including CyberGrants, EveryAction, Network for Good, and Social Solutions — backed by private equity firm Apax Partners. The combined entity positions itself as the second-largest and fastest-growing social good software company in the world, serving over 19,000 customers including more than 15,000 nonprofit organizations and over 50% of Fortune 100 companies through their corporate social responsibility programs. Its product suite covers fundraising, case management, volunteer management, and CSR platforms.
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