Chinese regulators have stepped in to block Meta's planned acquisition of Butterfly Effect, the Beijing-based startup behind the AI agent Manus, valued at over $2 billion.

The move puts Benchmark's anticipated exit in doubt. The early-stage venture firm had backed Butterfly Effect despite criticism from other investors who flagged the Beijing founding as a national security concern.

Meta announced the deal in December, and the price tag briefly made Benchmark's contrarian bet look prescient. The firm had faced pointed scepticism from peers in the venture community who questioned the wisdom of backing a Chinese-founded AI agent startup amid heightened US-China tensions.

What this signals

The regulatory intervention illustrates the growing friction between cross-border AI acquisitions and government oversight on both sides of the Pacific. Chinese authorities have shown increasing willingness to scrutinise outbound technology deals, particularly where AI capabilities are involved.

For Benchmark, the outcome is now genuinely uncertain. A completed exit at that valuation would have represented a strong return on a politically contentious bet. Whether the deal can be restructured, or whether it unravels entirely, remains unclear.

The episode also raises questions for other venture firms holding positions in Chinese-founded AI startups with Western acquirers circling. Regulatory risk is no longer a theoretical footnote in deal memos — it is a live variable.

Butterfly Effect had already been navigating US-China tensions before the Meta deal surfaced. The company had taken steps to distance Manus from its Beijing origins as scrutiny of Chinese AI products intensified in Washington.