developer-apis
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Blockchain.com sold financial freedom. Then came a $270 million lesson.
A Bitcoin search tool grew into a wallet, a trading business and an institutional lender. Its journey toward a proposed IPO reveals how much changes when a company built around holding your own keys starts extending credit.
Melissa Spent 40 Years Fixing the Customer Data Everyone Else Ignores
The California company started by mailing ZIP-code databases on floppy disks. Four decades later, its pitch is still disarmingly practical: stop a bad address, dead email or duplicate customer before the mistake gets expensive.
MoonPay Is Building the Checkout Counter for Money That Never Sits Still
MoonPay made its name turning cards into crypto. Now it is assembling the payments, trading and compliance machinery for a financial system that runs across bank accounts, wallets and hundreds of blockchains.
Binkey
Binkey is a Washington, DC fintech that lets online merchants accept pre-tax health benefit dollars - FSA, HSA, and related accounts - as payment at checkout. Its AI-powered engine classifies products at the SKU level to determine IRS eligibility in real time, automates claim filing and reimbursement, and routes funds through developer-friendly APIs. Products span Binkey Pay (checkout acceptance), FSA + HSA Rewind (recovering unused benefit dollars from past purchases), and Binkey Vision (out-of-network vision reimbursement). The company raised $3.3M in seed funding in 2023.
Popcorn
Popcorn is an AI-native, software-first telco that sells a single global phone plan - unlimited talk, text and data across 180+ countries with no roaming fees, delivered over eSIM for about $69 a month. Beyond connectivity, Popcorn layers AI on the line itself: screening calls, taking notes, and defending against deepfakes and SIM-swap fraud, while offering developer SDKs and APIs to add voice, messaging and phone numbers in a few lines of code. Founded in 2023 and based in New York, it argues telecom has barely changed in 25 years and rebuilds it as cloud software.
Superlinked, Inc.
Superlinked is a San Francisco-based infrastructure company building the 'vector computer' - a compute and data engineering framework that turns complex enterprise data into vector embeddings for Search, RAG, Recommendations and Analytics. It now also ships an open-source Inference Engine that lets agent teams self-host every model their agents call, claiming roughly 50x cost savings vs hosted per-token APIs.
People Data Labs
People Data Labs is a data-as-a-service company that sells clean, structured B2B data through developer-friendly APIs. Instead of selling dashboards or seats, it sells the raw material - billions of professional and company records that engineers, data scientists, and product teams use to build their own tools for recruiting, sales, marketing, identity verification, and AI. Founded in 2015 and headquartered in San Francisco, the company positions itself as the data layer underneath other companies' products rather than a competitor to them.