unified-api
(18)
Alexander Kuebel
He sold duplicate Panini stickers at seven, met his co-founders at university, and learned to turn ugly integration work into infrastructure. Now Kombo's CEO is taking that very specific obsession from Berlin to New York.
Terminal
Terminal is a universal API for telematics data in commercial trucking and fleet management. It connects to hundreds of telematics service providers - GPS, safety events, fault codes, dash-cam media, driver hours - and delivers that data in one normalized feed, so insurers, fleet software, logistics firms and fintechs can build products without wiring up hundreds of one-off integrations. Often called 'the Plaid of trucking,' the Toronto company was founded in 2023, went through Y Combinator's S23 batch, and has raised $26M to date.
Romain Sestier
Romain Sestier is the co-founder and CEO of StackOne, an integration platform that lets B2B SaaS products and AI agents connect to hundreds of enterprise systems through one unified API. After a decade spent maintaining integrations by hand at companies like Maxymiser, ContentSquare and Yieldify, and after building a product from zero to $1 billion in incremental revenue at Google, he and long-time collaborator Guillaume Lebedel started StackOne in 2023 to build the integration layer they always wished existed. The company reached six-figure revenue within weeks of launch and raised a $20M Series A led by GV in May 2025.
Briza
Briza is a Toronto-based insurtech that started as a unified, API-first platform for small-business commercial insurance - letting agencies, brokers and software platforms quote, bind and pay for policies like BOP, GL, WC and cyber through a single integration. Founded in 2016, the company has since narrowed its focus to carrier API reliability, applying manufacturing-style engineering discipline to reduce failed submissions and slow integrations that cost carriers premium.
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.
StackOne
StackOne is a London-based integration platform that gives B2B SaaS companies and AI agent builders a single unified API to connect to hundreds of enterprise systems - from HR and CRM to ticketing, messaging and identity. Combining a proprietary tool-calling LLM with a real-time, privacy-first engine, it offers 200+ pre-built connectors and thousands of ready-made actions so agents can reliably and securely take actions inside the software businesses already use. Founded in 2023 by Romain Sestier and Guillaume Lebedel, the company raised a $20M Series A led by GV (Google Ventures) in May 2025 and has surpassed 1 billion API calls.
Propexo
Propexo is a Boston-based proptech startup building the unified API and data platform for multifamily real estate. Often described as 'Plaid for commercial real estate,' Propexo lets software developers and property operators connect to 130+ property management systems - like Yardi, RealPage, AppFolio, Entrata, and Buildium - through a single, normalized API and no-code sync tool. What once took teams of engineers months to build, Propexo delivers in days, with standardized data models, webhooks, and enterprise-grade security. Founded in 2022 and a Y Combinator W2023 alum, it raised a $3.3M seed round led by Prudence in October 2023.
Remen Okoruwa
Remen Okoruwa is the co-founder and CEO of Propexo, a Y Combinator-backed Boston startup building a unified API for property management software. Pitched as 'Plaid for commercial real estate,' Propexo lets engineers connect to legacy systems like Yardi, RealPage and Entrata in days instead of months. An Iowa kid who studied engineering at Harvard, Remen took a winding road through McKinsey, a churn-fighting data startup, product leadership at HubSpot, and a rent-payments venture before landing on the unglamorous but enormous problem of moving property data. He now powers integrations behind more than half of the NMHC Top 15 managers.
Kinter.ai
Kinter.ai builds AI Accountants that execute the month-end financial close. Founded as Alloy Automation, an e-commerce integration platform, the company pivoted its connectivity expertise toward finance teams. Its agents proactively identify and log journal entries for accruals (payroll, prepaid, fixed assets), run cash application reconciliation, and work through the close checklist - learning on the job, scaling on demand, and costing less than traditional BPO. Kinter is trusted by global leaders including Amazon, Mastercard, and UPS, and is backed by a16z, Bain Capital Ventures, and Y Combinator.
Gregg Mojica
Gregg Mojica is the founder and CEO of Kinter.ai, the AI-accounting company that grew out of Alloy Automation, the integration platform he co-founded with Sara Du in 2019 (YC W20). He started coding at 12, shipped three apps before he turned 18, got into Cornell and skipped it to build payments infrastructure at First Data/Fiserv, then helped build Alloy into the connective tissue for thousands of ecommerce and AI-agent workflows backed by a16z and Bain Capital Ventures. Today his AI Accountants close the books for enterprises including Amazon, Mastercard and UPS.
OpenRouter
OpenRouter is a unified API gateway for large language models. Through a single OpenAI-compatible endpoint, developers can reach 400+ models from 60+ providers, with automatic routing, price comparison, and failover across vendors. It removes the need to maintain separate integrations for OpenAI, Anthropic, Google, Mistral and dozens of others, and now processes around 100 trillion tokens per month for more than 8 million users.
Rutter
Rutter is a unified API that lets B2B software read and write financial data across 60+ accounting, commerce, payments, and ads platforms - from QuickBooks and NetSuite to Shopify, Amazon, and Stripe - through a single integration. Founded in 2021 by Peter Zhou and Eric Yu, the New York company is positioning itself as the 'Plaid for commerce,' powering financial workflows like lending, AP/AR automation, supplier enablement, and agentic commerce for 100+ fintech companies including Ramp, Airwallex, and Payoneer.
Peter Zhou
Peter Zhou is the co-founder and CEO of Rutter, the New York-based unified API that connects business financial data across accounting systems, commerce platforms, payment processors, and ad networks. Often described as the 'Plaid for commerce,' Rutter lets B2B fintech companies plug into QuickBooks, Shopify, Amazon, Stripe and dozens more through a single consistent schema. A Yale-trained computer scientist and Y Combinator alum, Zhou and co-founder Eric Yu pivoted through years of failed startups before landing on Rutter, which raised a $27M Series A led by a16z in 2022.
Merge
Merge builds the connective infrastructure for modern SaaS and AI: one unified API that lets a product offer hundreds of HRIS, ATS, CRM, ticketing, and accounting integrations - and a newer Agent Handler that gives AI agents secure, observable access to thousands of third-party tools.
Gil Feig
Gil Feig is the Co-Founder and CTO of Merge, the unified API platform that lets B2B software companies add hundreds of integrations to their products in days instead of months. He started coding at 12, got a cease-and-desist from Facebook at 16, and launched Merge in the middle of COVID after interviewing 100 companies before writing a single line of code. The company has raised $74.5M, serves 4,000+ customers, and named Feig and co-founder Shensi Ding to the 2023 Forbes 30 Under 30 list.
Nathan Stewart
Nathan Stewart is a founding engineer at Merge (merge.dev), the unified API platform that lets B2B SaaS companies connect to hundreds of HRIS, ATS, CRM, accounting, and ticketing systems through a single integration. Based in New York and educated at The Ohio State University, Stewart is a backend developer who joined Merge in its early days and has helped scale the company to over 140 employees and $74.5M in funding. He describes himself as a 'Software Engineer & Puzzle Aficionado,' an apt description for someone building the connective infrastructure that keeps the modern SaaS stack wired together.
Shensi Ding
Shensi Ding is the co-founder and CEO of Merge, the unified API platform that lets B2B software companies offer hundreds of product integrations by integrating just once. A Columbia computer science graduate who detoured through investment banking at Credit Suisse and Silver Lake before becoming Chief of Staff at Expanse, she co-founded Merge in 2020 with college friend Gil Feig after they spent six months talking to 100+ companies about integration pain — without pitching a single solution. Merge has since raised $75M from Accel, NEA, and Addition, serves 7,000+ customers including Calendly, Gong, Ramp, and Brex, and has become critical infrastructure for the AI era as LLMs need real-time access to third-party data.
Jeremy Zhang
Jeremy Zhang is the co-founder and CEO of Finch, a San Francisco-based company building the unified API layer for employment systems. After studying Electrical Engineering and Economics at Duke University and engineering connected-car APIs at Smartcar, Zhang co-founded Finch in 2020 with Ansel Parikh to solve a deceptively simple problem: why does every HR and payroll software company make developers rebuild the same integrations from scratch? Finch now connects 200+ HR and payroll providers, covers 88% of U.S. employers, and has processed data for 18+ million employees. The company has raised $58.5 million in venture funding from General Catalyst, Menlo Ventures, and Y Combinator.