While much of the world remains fixed on the crisis in the Strait of Hormuz, the Red Sea has re-entered the geopolitical fold and this time, the fallout may reach far beyond oil markets.
Last week, the internationally recognized government of Yemen claimed an attack on Sanaa International Airport. In response, the Iran-backed Houthis declared a naval blockade on Saudi Arabia, threatening any vessel attempting to dock at Saudi ports.
It’s not the first time. The Houthis blockaded the Red Sea at the end of 2023, and a ceasefire signed with the United States in mid-2025 briefly cooled hostilities. But the re-ignition of the Iran conflict has pushed tensions with the Houthis back to a boiling point, and this time, the group is targeting Saudi Arabia.
The renewed threat compounds an already fragile global energy picture: roughly 20% of global oil flows through the Hormuz, while another 5% transits the Red Sea. In 2024 alone, 4.1 billion barrels of crude oil and refined petroleum passed through the Bab el-Mandeb Strait, the narrow chokepoint connecting the Red Sea to the Gulf of Aden.
But energy is only part of the story. Across East Africa, a new crisis threatens something less visible but equally consequential: a young, fast-growing blue economy startup ecosystem that has spent the past several years building investor confidence in the region’s maritime future.
A prolonged blockade wouldn’t just disrupt shipping lanes; it would disrupt the risk calculus that foreign investors use to decide whether East African ports, ecosystems, and coastlines are safe places to deploy capital. That’s where this crisis really bites.
A Blue Economy Built on Foreign Confidence
Africa’s bluetech sector is projected to generate $1.5 trillion in revenue by 2050, according to the Organisation for Economic Co-operation and Development. Much of that growth has been driven by a wave of innovators and startups increasingly oriented toward both the Red Sea and the Indian Ocean.
That momentum has been backed by real capital. The Western Indian Ocean Marine Science Association runs innovation funds offering grants of up to $200,000 to new ventures. Pangea Accelerator, a joint Kenyan-Norwegian initiative, has become one of the first blue-economy accelerators operating in Africa, linking regional startups to global investors focused on maritime trade. Seychelles issued the world’s first sovereign “blue bond,” backed by institutions including Calvert Impact Capital. And pan-African enabler OceanHub Africa has backed 32 ocean-impact startups with more than $10 million in external funding.
The momentum hasn’t gone unnoticed geopolitically. The EU launched BlueInvest Africa in 2022 specifically to connect African entrepreneurs and SMEs in the blue economy space, partly to advance marine renewable energy and maritime security cooperation. That strategic interest has helped fuel a broader rise in cleantech investment across the continent: according to investment firm Partech Partners, cleantech—which includes the blue economy—drew $192 million in venture capital in 2024, the second-highest total of any sector.
Why a Saudi Blockade Threatens a Kenyan Startup
Taken into account, what may unfold in the Red Sea is more than just an oil story: nearly 80% of venture capital funding in Africa comes from abroad, according to the International Finance Corporation. That dependence is a strength in calm waters and a liability in rough ones. Foreign investors don’t need a blockade to reach their ports; they simply need enough uncertainty about regional stability to delay a funding round or reallocate capital to calmer markets.
Startups in this space largely lack the balance sheets, insurance infrastructure, or geopolitical hedges that larger shipping and energy firms rely on to absorb this kind of shock, which means the ecosystem’s most promising ventures are also its most exposed.
What’s at Stake if the Bab el-Mandeb Escalates
Just as the Strait of Hormuz matters for far more than oil, the consequences of a new Red Sea crisis extend well beyond shipping insurance premiums and freight rates. If hostilities along the Bab el-Mandeb escalate further, the pressure won’t fall only on major maritime shipping companies. It will also land on the small innovators building marine renewable energy projects, ocean-health startups, and blue bonds in Mombasa and Dar es Salaam. Ventures that took years to attract foreign capital are now most likely to retreat at the first sign of sustained instability.
The Red Sea crisis throughout 2024 showed how quickly a regional blockade can ripple through global shipping. What it didn’t fully reveal—because the timeline was shorter and the venture ecosystem was younger—is how a second, prolonged crisis might reshape investor appetite for East Africa’s blue economy for years to come. That is the story worth watching now, alongside the headlines out of the Hormuz.