On September 10, 2026, two of Southeast Asia’s biggest infrastructure players announced they are going to lay new fiber-optic cable across the seabed between Thailand and Singapore. GULF (formally Gulf Development Public Company Limited, a Thai energy conglomerate listed on the Stock Exchange of Thailand, or SET — Thailand’s national stock market, roughly the equivalent of the NYSE for American readers) and Singtel (Singapore’s largest telecommunications operator, comparable to a hybrid of AT&T and a regional cloud provider) confirmed a strategic partnership to jointly build and invest in submarine cable infrastructure connecting the two countries.
If that sounds like a dry engineering footnote, it isn’t. Gulf Development is a Thai energy and infrastructure group that has been expanding into data centres and digital services, and this cooperation is meant to provide higher-capacity international connectivity for data centres, cloud providers, and AI services across the region. In other words: this is a bet, backed by real capital, that Thailand is about to become one of the physical engines of Asia’s AI boom — and the two companies want to control the pipes that carry the data.
Why a Cable Under the Ocean Actually Matters to Your Business
For readers outside Thailand, it’s worth explaining why telecom executives get excited about undersea cables. Roughly 95-99% of all international internet traffic — video calls, cloud backups, AI model training data, financial transactions — travels through fiber-optic cables laid on the ocean floor, not through satellites. When a country wants to attract data centers, cloud providers, or AI companies, it needs guaranteed, low-latency, high-capacity connections to its neighbors and to the rest of the world. Without enough subsea cable capacity, a country can build all the data centers it wants — the information still has nowhere fast enough to go.
Singtel and Gulf Development said the partnership will develop and invest in subsea cable assets, with the first initiative being the Vietnam-Thailand-Singapore, or VTS, Cable System, expected to be operational by 2030, with capital spending spread over several years. That five-year runway matters: this isn’t a quick announcement designed to move a stock price for a day. It’s a multi-year capital commitment tied to a specific regional growth thesis.
Meet the Players: GULF and Singtel
GULF (Gulf Development) is led by Sarath Ratanavadi, one of Thailand’s most prominent business figures, who built the company from a power-generation business into a diversified energy and infrastructure group with a growing digital arm, including data centers and telecom investments. Think of it as a Thai conglomerate that started in electricity and is now racing into the AI infrastructure business the way some American utility and energy companies have started chasing data center deals.
Singtel Group is Singapore’s flagship telecom operator, majority government-linked, and one of the largest connectivity providers in Asia. Singtel’s Digital InfraCo business includes its submarine cable network, its regional data-centre arm called Nxera, and RE:AI, its GPU-as-a-service business — reflecting the group’s view that growing AI and cloud workloads are driving demand for high-capacity connectivity alongside physical data-centre infrastructure.
Singtel’s group CEO, Yuen Kuan Moon, framed Thailand and Singapore as two of Southeast Asia’s most important digital economies, saying the partnership brings together Singtel’s expertise in digital infrastructure and submarine cable systems with Gulf’s capabilities to meet growing demand for cloud, AI, data centre, and digital services.
Inside the VTS Cable System
Here’s where it gets a little technical, but it’s worth untangling because the naming is genuinely confusing even for people who follow Thai business news closely.
There is an existing project called the Vietnam-Singapore Cable System, also abbreviated VTS. That original VTS cable directly connects Vietnam and Singapore, with branching units linking Cambodia, Thailand, and Malaysia, and is led by Vietnam’s Viettel together with Singtel, which signed a memorandum of understanding for the project in April 2024.
What GULF and Singtel announced is a separate, new Vietnam-Thailand-Singapore Cable System that reuses the same acronym but is a distinct build. This new project builds on the same VTS name and general route as the earlier Viettel-Singtel cable, but Gulf and Singtel are treating it as a new link, with Viettel managing the landing station in Vietnam and Thailand featured as a branch connection alongside Cambodia and Malaysia — and they are targeting 2030, later than the original 2027 timeline Viettel and Singtel had set for the first VTS cable. For foreign investors, the practical takeaway is simple: there are now two competing-but-related subsea projects wearing the same initials, and Thailand is a landing point on both, which only reinforces how central the country has become to regional connectivity planning.
On the ground, the commercial execution will lean on Singtel Singapore and Thailand’s AIS — Advanced Info Service, Thailand’s leading mobile network operator and a Singtel-linked telecom brand most Thais interact with daily — which will draw on their market expertise, connectivity capabilities, and customer bases to support development and commercialization of the system.
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Thailand’s Bigger Bet: Becoming ASEAN’s AI and Digital Hub
This cable deal doesn’t exist in isolation. It is one piece of a much larger, government-backed push to turn Thailand into a regional digital and AI hub — and the numbers behind that push are large enough that international readers should take notice even if they’ve never thought about Thailand as a tech market before.
Thailand’s digital economy is projected to expand 4.2% to more than 5.6 trillion baht (roughly $170 billion) in 2026, which would account for about 29% of the country’s estimated 19.3 trillion baht GDP. Thailand also ranked second among ASEAN nations in the 2025 Government AI Readiness Index published by Oxford Insights.
The government isn’t just talking. Thailand’s Board of Investment — the state agency that approves and courts foreign investment, comparable to a national economic development authority — reported that investment promotion applications in the first quarter of 2026 alone exceeded 1.01 trillion baht (about $30.7 billion) across 624 projects, with the digital sector accounting for 873.7 billion baht of that total. Separately, Thailand is projected to attract roughly 570 billion baht (about $15.9 billion) in data centre investment between 2026 and 2030, driven by a severe undersupply of capacity relative to demand from AI and cloud computing.
Global tech names are already showing up. Google Cloud has committed $1 billion to build a data centre in Bangkok, a project expected to contribute 1.4 trillion baht (about $44 billion) to the Thai economy over time. TikTok’s parent company ByteDance has pledged $8.8 billion for regional data centre development with Thailand as a key focus, alongside dozens of other hyperscaler and colocation projects across the region.
Put simply: the GULF-Singtel submarine cable is the connective tissue for a much bigger industrial policy bet — Thailand wants the data centers, and data centers need cables like this one to actually be useful.
How Thailand Stacks Up Against Vietnam and Indonesia
No article about Southeast Asian digital infrastructure is complete without putting Thailand next to its two biggest regional rivals for data center and AI investment: Vietnam and Indonesia.
Vietnam has been the more aggressive cable builder in raw numbers. Vietnam’s state telecom giant Viettel has invested in cables such as AAE-1, TGN-IA, AAG, APG, and ADC, and the country’s national strategy targets at least 15 submarine cable systems with a combined capacity of 334 terabits per second by 2030, including at least two Vietnamese-owned cables prioritizing shorter routes to Asian digital hubs. Vietnam has leaned on cheap manufacturing-linked electricity demand and government-directed telecom investment to move fast.
Indonesia, meanwhile, has focused less on being a cable hub and more on becoming a domestic data storage and processing base tied to its own enormous population of roughly 280 million people, alongside serving as what one industry analysis calls “a digital bridge for Singapore” through its Batam special economic zone near the Singapore border.
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Thailand’s pitch is different: rather than competing purely on cable count or population size, it is positioning itself as the reliable, lower-cost alternative to space-and-power-constrained Singapore, while leaning on its existing manufacturing base, the Eastern Economic Corridor (EEC — a government-designated industrial zone east of Bangkok originally built around auto manufacturing and now being repurposed for high-tech and data center investment), and comparatively cheaper electricity and land. Thailand’s data centre market hit an estimated $1.85 billion in 2025 and is forecast to reach $4.31 billion by 2030, a compound annual growth rate of more than 18% — faster than most other ASEAN markets — while a single Vietnamese company, Galaxy, has already announced a $2 billion investment in green-AI data centres in Rayong, part of Thailand’s industrial corridor.
The regional data center market as a whole is expanding fast enough to make room for all three countries at once. The ASEAN data center industry was worth approximately $14.07 billion in 2025 and is projected to grow to $19.46 billion by 2030, a compound annual growth rate of 6.7%, while the region’s AI market is expected to reach $65 billion by 2035 and could boost ASEAN’s overall GDP by as much as $1 trillion by 2030.
The Global Context: Why Everyone Is Suddenly Racing to Lay Cables
If you’ve followed technology news out of the United States or Europe, you’ve likely seen headlines about hyperscalers — Amazon, Microsoft, Google, Meta — spending tens of billions of dollars building AI data centers and even funding their own subsea cables (Meta’s 2Africa cable and Google’s various Pacific projects are well-known examples). What’s happening between Thailand and Singapore is the Southeast Asian version of that same global trend, just with regional players — an energy company and a national telecom operator — taking the lead instead of an American Big Tech firm.
Southeast Asia now hosts more than 2,000 data centres across Indonesia, Malaysia, Singapore, Thailand, Vietnam, and the Philippines, with hundreds more under construction, and total regional data centre investment could reach $30 billion by 2030, with demand expected to grow at 20% annually through 2028. This is not simply a story of cloud migration — it reflects a geopolitical dimension too. Analysts describe it as an infrastructure race shaped by AI workloads, sovereign data requirements, and the broader competition between American and Chinese technology ecosystems.
That last point matters for foreign business readers specifically: as more countries adopt “data sovereignty” rules requiring citizen or corporate data to be stored within national borders, connectivity infrastructure like the GULF-Singtel cable becomes strategically important, not just commercially convenient. A country with strong, diversified international bandwidth has more leverage to insist that global cloud providers build locally rather than route everything through a single regional gateway like Singapore.
What Could Go Wrong
It’s worth tempering the optimism with a dose of realism. It is important to separate approved investment value from actual, realized financial recognition — announced pledges and approved applications in Thailand do not always translate into completed, operating facilities on the original timeline. Industry analysts have also warned that scaling physical supply remains a critical hurdle, since data centres are highly resource-intensive, requiring substantial electricity, water, land, and high-speed connectivity, demands that only intensify as AI workloads grow.
There is also execution risk specific to this cable project: a 2030 target date is four years out, capital spending is described only as being “spread over several years” without a disclosed total figure, and the confusing overlap with the earlier Viettel-Singtel VTS cable suggests the regional cable landscape is still being sorted out rather than fully planned. Thai financial institutions such as Krungsri (part of Japan’s Mitsubishi UFJ Financial Group) are already active in financing individual data centre projects, such as an $880 million green loan for a joint venture between Digital Edge and B. Grimm Power in Chonburi, but access to affordable financing at this scale will need to keep pace with construction ambitions.
The Takeaway: What This Means If You Do Business In or With Thailand
For international investors, this announcement is a signal — not a standalone opportunity, but confirmation that the physical infrastructure backbone underpinning Thailand’s AI and data-center growth story is being built out with serious, long-horizon capital from credible players, not just government slogans. It reduces one of the practical risks (unreliable international connectivity) that has historically made investors more comfortable putting data centers in Singapore than in Bangkok or the Eastern Economic Corridor.
For companies considering Thai operations — whether a cloud provider, a fintech, or a multinational setting up a regional back office — the message is that Thailand’s connectivity to global networks is set to improve meaningfully by the early 2030s, which should be factored into any five-to-ten-year facility or expansion planning rather than treated as a today problem.
For expats and market-watchers, the practical shorthand is this: when a Thai energy conglomerate starts acting like a telecom infrastructure company, and a currency exchange rate hovering around 32.9 baht to the US dollar hasn’t stopped that company from committing to a multi-year international infrastructure build, it’s a reasonably strong vote of confidence that Thailand’s digital ambitions are being taken seriously by the people who actually have to put up the capital.
Key Takeaways
- GULF (Gulf Development) and Singtel have partnered to build new submarine cable connectivity between Thailand and Singapore, starting with the Vietnam-Thailand-Singapore (VTS) Cable System, targeted for 2030.
- The new VTS project shares a name and route with an earlier, separate Viettel-Singtel cable from 2024, so there are now two related but distinct VTS systems in the region.
- The cable deal supports Thailand’s broader push to become an ASEAN AI and data-centre hub, backed by over $30 billion in Q1 2026 investment applications and a projected $15.9 billion in data-centre investment through 2030.
- Thailand is competing with Vietnam (more aggressive cable-building) and Indonesia (domestic data hosting focus) for the region’s AI infrastructure investment.
- Execution risk remains: no total capital figure was disclosed, the timeline runs to 2030, and approved investment does not always equal completed infrastructure.
Frequently Asked Questions
Q: What did GULF and Singtel actually announce?
A: A strategic partnership to jointly develop and invest in submarine cable infrastructure connecting Thailand and Singapore, starting with the Vietnam-Thailand-Singapore (VTS) Cable System.
Q: Who are GULF and Singtel?
A: GULF is Gulf Development, a Thai energy and infrastructure conglomerate listed on the Stock Exchange of Thailand. Singtel is Singapore’s largest telecommunications group, with major submarine cable and data-centre businesses.
Q: When will the new cable system be ready?
A: The companies say the VTS Cable System is expected to be operational by 2030, with capital spending spread across several years.
Q: Is this the same VTS cable that Vietnam announced in 2024?
A: No. It shares the VTS name and a similar route but is a separate project. The 2024 cable was led by Vietnam’s Viettel and Singtel, targeting 2027; this new GULF-Singtel project targets 2030 and treats Thailand as a branch connection.
Q: Why does a submarine cable matter for AI and cloud computing?
A: Almost all international internet and cloud data travels through undersea fiber cables. More cable capacity means faster, more reliable connections for data centres, AI training, and cloud services.
Q: Is Thailand actually becoming a major AI hub in Southeast Asia?
A: Thailand’s digital economy is projected to reach roughly 5.6 trillion baht ($170 billion) in 2026, about 29% of GDP, and the country ranked second in ASEAN on a 2025 AI readiness index, backed by tens of billions of dollars in approved digital investment.
Q: How does Thailand compare to Vietnam and Indonesia for data centre investment?
A: Vietnam has built more submarine cables and has an aggressive 2030 cable strategy; Indonesia focuses more on domestic data hosting tied to its large population; Thailand is positioning itself as a lower-cost, well-connected alternative to space-constrained Singapore.
Q: How much is Thailand expected to invest in data centres?
A: Roughly 570 billion baht (about $15.9 billion) in data-centre investment is projected between 2026 and 2030, on top of over $30 billion in digital-sector investment applications approved in just the first quarter of 2026.
Q: Which global tech companies are already investing in Thailand’s digital infrastructure?
A: Google Cloud has committed $1 billion to a Bangkok data centre, and ByteDance has pledged billions for regional data-centre development with Thailand as a focus area, alongside AWS and Microsoft Azure capacity expansions.
Q: Is it safe to invest in Thailand’s digital infrastructure or AI sector in 2026?
A: As with any infrastructure bet, there is execution risk — undisclosed capital totals, multi-year timelines, and the gap between approved investment and completed projects — but the underlying government and private-sector commitment appears substantial and sustained.
Q: What is AIS and why is it mentioned in this deal?
A: AIS (Advanced Info Service) is Thailand’s leading mobile network operator and a Singtel-linked telecom brand that will help commercialize the new cable system using its existing market presence and customer base.
Q: What does this mean for businesses operating in Thailand?
A: Companies planning multi-year operations, cloud migration, or data-centre use in Thailand should expect meaningfully improved international connectivity to Singapore and beyond by the early 2030s, which is worth factoring into long-term infrastructure and location planning.
