Thailand wins a rising importance in the international telecommunicatons and Internet market with its geographical advantage and open market strategy. 

According to the National Broadcasting and Telecommunication Commission (NBTC), there are now 11 licensed International Internet Gateway (IIG) providers and more than 200 Internet Service Providers (ISP) in Thailand; there are also 280+ telecom service providers in Thailand, more than 60 providers are granted with international telecom services licenses for IPLC, IDD, etc. The market for international connectivity in Thailand is highly competitive, with no single telecoms company controlling a significant amount of the market.

According to NBTC, the international Internet gateway bandwidth in Thailand has been approximately 13Tbps as of the end of 2020.

• TOT, TRUE and 3BB (Jastel) are leading and dominating on fixed broadband service, accounting for a total of approximately 87% market share by the end of 2018.
• AIS Group, DTAC Group and TRUE are leading and dominating on mobile broadband service, accounting for a total of approximately 97% market share by the end of 2018.
• CSL-IX, Thailand-IX (CAT), AWN-IX (AIS), TIG-IX (TRUE) and Jastel-IX are leading international Internet gateway providers, each with international bandwidth of more than 1Tbps. TCCT-IX and TOT-IX each has about 700Gbps of international bandwidth. 

The majority of Thailand international bandwidth connect to Singapore, Malaysia and Hong Kong. 

There are various cross-border terrestrial cable systems connecting Thailand with its neighboring countries including Cambodia, Laos, Myanmar and Malaysia.

There are now 8 international submarine cable systems landing in Thailand, and two new cables under construction:

• AAE-1
• FLAG Europe Asia (FEA)
• SMW3
• SMW4
• AAG
• APG
• MCT
• TIS
• SJC2 (2025)
• ADC

CAT is the leading operator for international submarine cable sytems in Thailand, being the landing party in Thailand for FEA, SMW3, SMW4, AAG, APG, TIS and ADC, owns and operates five submarine cable landing stations including

• the Sri Racha Cable Landing Station,
• the Petchaburi Cable Landing Station,
• the Songkhla Cable Landing Station,
• the Satun Cable Landing Station, and
• the Chumphon Cable Landing Station (now for domestic cable)

TOT is the landing party in Thailand for AAE-1 and operates cable landing stations in Satun and Songkhla.

In 2021, CAT Telecom and TOT Public Company Limited merged to established and corporatize National Telecom Public Company Limited (NT), a Thai state-owned telecommunications company. 

Sympony is a member of the Malaysia-Cambodia-Thailand (MCT) cable system, owns and operates the Maolee Cable Landing Station.

TRUE Corporation has invested in SJC2 cable system which is expected to be completed in 2022.