FAST vs. SWIFT: How They Compare and a Better Way

FAST vs SWIFT: How They Compare And A Better Way

Lightspark Team
Jun 20, 2025
4
 min read

Payment rails are the infrastructure that enables the transfer of money between banks, payment service providers, and other financial institutions. For businesses, selecting the appropriate payment rail hinges on factors such as speed, cost, geography, and customer satisfaction.

FAST and SWIFT are two prominent examples of payment rails. FAST (Fast and Secure Transfers) is a real-time payment system primarily used in Singapore, while SWIFT (Society for Worldwide Interbank Financial Telecommunication) facilitates international money transfers. Lightspark aims to transcend these traditional rails by leveraging Bitcoin’s decentralized foundation to create a more efficient, global payments network.

The Payment Rail Landscape

Payment rails are crucial for moving money between parties, but current systems can be slow, fragmented, and costly, often leading to delays and higher transaction fees that impact both businesses and consumers.

Understanding FAST and SWIFT

How FAST Works

FAST (Fast and Secure Transfers) enables near-instantaneous fund transfers between users, operating 24/7. The process involves a user initiating a payment via a mobile app or web interface, which is then routed through the FPS infrastructure to the recipient's payment service provider (PSP). The transaction is processed in real-time, with funds immediately available to the recipient. The technology behind FAST includes RTGS or DNS for settlement, proxy databases for alias management, and ISO 20022 messaging standards. The system supports various use cases, including P2P, merchant, bill, and government payments, ensuring seamless, secure, and efficient transactions.

Strengths and Limitations of FAST

Strengths

  • FAST offers near-instantaneous transfers, providing immediate availability of funds for recipients.
  • It is cost-effective, often being fee-free or having very low transaction costs.
  • FAST supports a wide variety of use cases, including P2P, merchant, bill, and government payments.

Limitations

  • FAST is limited to domestic transfers within specific jurisdictions, such as the UK or Singapore.
  • Adoption of FAST can be uneven across different countries, influenced by local factors like digital literacy and internet penetration.
  • There may be competing FPS initiatives within a jurisdiction, potentially fragmenting the market and limiting network effects.

How SWIFT Works

SWIFT operates as a global member-owned cooperative, connecting over 11,000 financial institutions to facilitate secure, standardized financial messaging. The process involves integrating back-office systems with SWIFT’s network using solutions like Alliance Cloud and Alliance Access. Transactions are sent as standardized messages, often using ISO 20022, ensuring rich, structured data. SWIFT GPI and SWIFT Go enhance payment tracking and speed. Security is paramount, with tools like the Customer Security Programme (CSP) and compliance analytics ensuring robust defenses. The typical transaction flow includes message transmission, risk screening, and end-to-end tracking, ensuring secure and efficient cross-border payments.

Strengths and Limitations of SWIFT

Strengths

  • SWIFT provides a secure and reliable method for international money transfers, connecting over 11,000 financial institutions worldwide.
  • It offers comprehensive solutions, including payments, securities, risk and compliance, and data analytics, addressing various industry needs.
  • SWIFT is a leader in financial messaging standards, notably ISO 20022, ensuring consistent and structured data for transactions.

Limitations

  • SWIFT transactions can be slow, often taking 1-4 working days to complete due to the involvement of multiple correspondent banks.
  • Fees for SWIFT payments can be high, including additional charges from intermediary banks and potential exchange rate markups.
  • The system's complexity and the need for continuous adaptation to new standards and technologies can pose operational challenges for member institutions.

FAST and SWIFT Compared

Transaction Speed

FAST processes transactions almost instantly, with funds typically available within seconds. In contrast, SWIFT transactions can take 1-4 working days due to the involvement of multiple correspondent banks. Lightspark, leveraging the Lightning Network, offers real-time, global money movement, making transactions as fast as information on the internet.

Fees

FAST is usually free or very low cost, making it a cost-effective option for domestic transfers. SWIFT, however, can be expensive, with fees ranging from £5-£25 plus potential intermediary and exchange rate markups. Lightspark emphasizes low-cost transactions, eliminating hidden fees and reducing costs significantly.

Cross-Border Capabilities

FAST is limited to domestic transfers within specific jurisdictions like the UK and Singapore. SWIFT, on the other hand, is designed for international transfers, connecting over 11,000 financial institutions worldwide. Lightspark bridges traditional financial systems with next-generation technology, enabling seamless, low-cost, and reliable cross-border payments.

Security Protocols

While specific security details for FAST are not widely documented, SWIFT is known for its robust security measures, including the Customer Security Programme (CSP) and compliance analytics. Lightspark, built on Bitcoin’s decentralized foundation, ensures secure transactions with strong security guarantees and self-custodial wallets.

Operational Hours

FAST operates 24/7, allowing for continuous, near-instantaneous transactions. SWIFT does not explicitly state its operational hours, but transactions typically take 1-4 working days. Lightspark’s infrastructure is always on, supporting 24/7 payments and eliminating traditional banking delays.

How FAST And SWIFT Are Used

Domestic Retail Payments

FAST is ideal for domestic retail payments due to its near-instantaneous processing and low costs, making it perfect for urgent transactions within the UK or Singapore. SWIFT is less suitable due to higher fees and slower processing times. Lightspark offers real-time, low-cost payments, enhancing the retail experience with instant, secure transactions.

International Business Transactions

SWIFT is commonly used for international business transactions, providing a secure and standardized method for cross-border payments. However, it can be slow and costly. Lightspark's global reach and low-cost, real-time payments make it a superior alternative, enabling businesses to move money instantly and efficiently across borders.

Peer-to-Peer Transfers

FAST excels in peer-to-peer transfers within its jurisdiction, offering immediate fund availability. SWIFT is not practical for such small, domestic transactions due to its complexity and cost. Lightspark enhances P2P transfers by providing instant, low-cost, and secure transactions, even across borders, leveraging the Lightning Network.

Government Payments

FAST is effective for domestic government payments, ensuring quick disbursement of funds. SWIFT is less efficient for this use case due to its slower processing times. Lightspark can streamline government payments by offering real-time, secure, and low-cost transactions, ensuring timely and efficient fund distribution on a global scale.

Time for a New Standard

Lightspark intro image

Lightspark provides a global payments infrastructure that leverages Bitcoin’s decentralized foundation to offer real-time, low-cost, and secure cross-border transactions, surpassing the limitations of FAST and SWIFT.

  • Built on Bitcoin: Lightspark’s infrastructure is powered by Bitcoin’s open, decentralized foundation, ensuring secure and efficient transactions.
  • Instant Settlement: The platform enables real-time money movement, allowing for instant settlement of payments across borders.
  • Lower fees: Lightspark offers low-cost transactions, eliminating hidden fees and reducing costs significantly compared to traditional systems.
  • Cross-border security by default: The infrastructure provides secure, cross-border payments by default, leveraging Bitcoin’s strong security properties.

A Modern Infrastructure

For businesses looking to transcend traditional payment systems like FAST and SWIFT, Lightspark offers the following solutions:

  • Wallets: Build feature-rich digital wallets with flexible custody options, supporting Bitcoin, Lightning Network, stablecoins, and domestic payment rails.
  • Digital Banks: Connect to the Money Grid to expand into new markets, move money 24/7, and stay competitive with real-time, low-cost payments.
  • Exchanges: Seamlessly integrate with the Bitcoin Network to offer instant, low-cost Bitcoin transfers and compliance tools.
  • Stablecoins: Launch stablecoins instantly on Bitcoin using Spark, enabling fast, cheap, and user-friendly financial applications.

Emerging technologies and evolving regulations are reshaping the future of payments. Lightspark offers real-time, low-cost global payments, bridging traditional systems with next-gen tech. Don’t just choose between two outdated options—upgrade to a payment rail built for the internet age. Learn more or book a demo.

Build the Future of Payments on Bitcoin

Lightspark helps digital banks, wallets, and developers deliver fast, borderless money movement — with Bitcoin as the settlement layer.

Book a Demo

FAQs

What does FAST mean?

In payment systems, 'fast payments' refer to real-time or near real-time fund transfers available 24/7/365, involving end users like individuals, merchants, and businesses. These systems enhance financial inclusion, competition, and digitalization by providing swift, reliable, and secure transactions.

What does SWIFT mean?

SWIFT is a global member-owned cooperative and the world’s leading provider of secure financial messaging services, ensuring secure, standardized communication for financial institutions worldwide. It aims to enhance transaction speed, transparency, and security in global financial transactions.

What is Lightspark?

Lightspark provides global payments infrastructure for digital banks, wallets, and exchanges, enabling real-time, low-cost, and borderless money movement using Bitcoin, fiat, and stablecoins. It connects businesses to the Money Grid, a decentralized global payments network built on Bitcoin.

What is the Lightning Network?

The Lightning Network is a technology that works alongside Bitcoin to enable instant, low-cost payments. It facilitates real-time, global money movement by managing nodes that handle liquidity, routing, and uptime, making Bitcoin transactions faster and cheaper.

What are the benefits of the Lightning Network?

Lightspark leverages the Lightning Network to enable instant, secure, and low-cost payments, bridging current financial systems with next-generation technology. This infrastructure supports real-time global money movement, reduces transaction costs, and enhances scalability for Bitcoin.