The LSE Directory / Data providers
Twelve Data is a financial market data provider that delivers real-time, delayed, and historical pricing plus company fundamentals through a unified REST API and WebSocket streaming service. Its coverage spans stocks, ETFs, forex, cryptocurrencies, indices, and commodities, with the company citing more than 190,000 stock symbols, 56,000+ ETFs, 1,900+ cryptocurrencies, and 1,300+ forex pairs across 250+ exchanges and 90+ countries on its own site. Data is consumable via JSON or CSV REST calls, WebSocket streaming, official SDKs (Python, Go, C++, C#, Java, R), and spreadsheet add-ins for Excel and Google Sheets. The company positions itself as a single, unified access point spanning multiple asset classes rather than a single-market specialist, aiming its product at developers, algorithmic traders, fintech companies, research institutions, and financial institutions who want one API instead of separate feeds per asset class. It advertises WebSocket latency of roughly 170ms on average and a 99.95% SLA, and states it processes more than 700 million API requests a day, with peaks above 1 million requests per minute. In January 2026 it added Cboe Europe Equities market data (MIC: BCXE) covering listings across 18 European countries, extending its European equities footprint alongside its existing US and global exchange coverage. Twelve Data operates as Twelve Data Pte. Ltd., headquartered in Singapore, and states it was founded in 2018 (one independent aggregator's registry record lists the Singapore entity's incorporation date as February 2020, which may reflect a later corporate registration rather than the company's operating start; the earlier date is used here). Sergey Sokolov is identified in third-party company databases as co-founder. The company was a founding member of the API3 Alliance, announced in August 2021, a coalition of API providers building first-party blockchain oracles via the Airnode framework to feed traditional market data into Web3 applications. Twelve Data's marketing describes serving individual developers and traders up through banks and large financial institutions, though no specific named enterprise clients were verifiable in this research pass. Through 2026 the company has continued shipping incremental platform updates on a monthly cadence, including WebSocket symbol-formatting fixes, more consistent commodity price derivation, a dedicated page describing its data offering for AI and LLM workflows, and resilience improvements to FX minute-bar feeds around upstream data gaps, alongside the Cboe Europe expansion.
