Halliday

Halliday is a unified crypto payments infrastructure platform that enables developers and blockchain projects to integrate onramps, bridges, cross-chain swaps, and deposits through a single API and customizable UI. The platform intelligently routes user transactions through the optimal pathway based on geography, payment method, and latency — connecting to a broad network of onramp providers, centralized exchanges, and bridging protocols. Halliday is fully non-custodial by design and supports rapid integration with as few as 7 lines of code. The company raised a $20M Series A led by a16z crypto in March 2025 and has worked with clients such as Story Protocol to reduce onboarding time from 30+ minutes to seconds.