api-infrastructure
(6)
Orthogonal
Orthogonal is a San Francisco startup building the discovery, orchestration, and payment layer for AI agents. Through a single SDK, REST API, MCP server, or CLI, agents can find, call, and pay per-use for 35+ third-party APIs - from data enrichment to search and scraping - with no subscriptions, no key management, and no sales calls. Founded in 2025 by Christian Pickett and Bera Sogut, the company raised a $4.3M seed round led by Pantera Capital and is part of Y Combinator's Winter 2026 batch.
Fuze
Fuze is a Dubai-based digital asset infrastructure company that lets banks, fintechs, and enterprises across MENA and Turkey offer regulated crypto and stablecoin services through a single API. Its stack spans Digital Assets-as-a-Service, an OTC trading desk, stablecoin payment rails, embedded trading, and custody, all built on regulated, compliant infrastructure. Licensed by Dubai's VARA and holding a Retail Payment Services license from the UAE Central Bank, Fuze has onboarded hundreds of institutions and processed billions in digital asset volume since its 2023 launch.
Kombo
Kombo is a unified API that lets B2B software companies connect to hundreds of HR, payroll, recruiting (ATS), and learning systems through a single integration. Instead of building and maintaining separate connectors to systems like Personio, BambooHR, Workday, Greenhouse, and Paychex, customers integrate Kombo once and gain access to a normalized data model and authentication layer across 300+ HR and ATS tools. Founded in 2022 and based in Berlin and New York, Kombo positions itself as the infrastructure layer for people data - from hire to retire.
Phyllo
Phyllo is a universal API that gives developers and businesses secure, creator-consented access to data across hundreds of social and creator platforms - YouTube, Instagram, TikTok, Twitch, LinkedIn, Substack, Shopify and more. Often described as 'Plaid for the creator economy,' Phyllo maintains live data feeds and returns a normalized dataset covering identity, engagement, content and income, so companies building influencer marketing tools, creator-focused fintech, and brand-safety screening can integrate once instead of wrangling dozens of individual platform APIs.
Speakeasy
Speakeasy is a San Francisco developer-infrastructure company that turns an OpenAPI specification into production-grade, type-safe SDKs across ten-plus languages, then keeps them in sync automatically as the API changes. Founded in 2022 by Sagar Batchu and Simon Yu, it has expanded from SDK and Terraform-provider generation into an AI control plane for the Model Context Protocol - products like Gram and the MCP Gateway let companies expose their APIs as governed tools for AI agents. Speakeasy has raised roughly $26 million, including a $15M Series A led by FPV Ventures in 2024, and counts Vercel, Mistral AI, Clerk, Kong, Fivetran, Airbyte, and SolarWinds among its customers.
Spinwheel
Spinwheel is an Oakland-based fintech that provides real-time consumer credit data and embedded-payments infrastructure through developer APIs. Using a credentialless approach that needs only a phone number and date of birth, Spinwheel lets lenders, personal-finance apps, and debt-management companies connect, verify, and act on a consumer's debts and liabilities. The platform supports the full consumer-credit lifecycle - from segmentation and prequalification to disbursement, management, and payment - and, as of its 2025 Series A, powers more than 15 million users and 165 million connected accounts representing over $1.5 trillion in connected debt.