5 impressive API monetization models

Bill Doerrfeld | March 19, 2026

Usage-based pricing is in: These 5 APIs epitomize that shift

OpenAI's developer platform has reached roughly $1 billion in annualized revenue. 😲


Most people familiar with API businesses have heard the canonical success stories (Stripe and Twilio) along with earlier examples like the Amazon Mandate, eBay’s Buy APIs, Expedia Group’s partner ecosystem, and Salesforce’s platform.


But in 2026, a new breed of usage-based monetization is emerging, increasingly built around on-demand infrastructure and API-level metering.


My latest post for the Zuplo blog highlights a handful of API monetization success stories from the 2020s, including Plaid, AssemblyAI, OpenAI, and Algolia — and revisits SendGrid as a classic example (and notable exit).


Check it out to see what these APIs enable, what units they use to meter usage, and what the business outcomes look like.


Read: 5 API Monetization Success Stories

Other Blog Posts

Your AI model might disappear tomorrow: what now?

By Bill Doerrfeld • June 17, 2026
My latest for LeadDev considers how engineering leaders should respond in the wake of uncertainty in the AI model market.

My research into 10 MCP gateways

By Bill Doerrfeld • June 10, 2026
I'm working with Zuplo on some new content around their MCP Gateway release. First up: a deep comparison of MCP gateways on the market!

Signs point to AI talent redistribution, not replacement

By Bill Doerrfeld • June 10, 2026
The constant barrage of AI layoffs is overshadowing the economic reasons behind these cuts, as well as the net-positive talent redistribution happening at large.

Reviewing MCP servers to connect with databases

By Bill Doerrfeld • June 8, 2026
My latest for InfoWorld reviews MCP servers and agent-ready tools for connecting AI agents with popular database styles.

When do you pull the plug on software projects?

By Bill Doerrfeld • May 29, 2026
For my latest DirectorPlus edition, Joel Carusone from NinjaOne shares how engineering leaders can build the muscle for making tough calls.
Close-up of a glowing laptop keyboard in blue light, viewed at an angle with the screen above

How MCP supports context engineering

By Bill Doerrfeld • May 25, 2026
My latest InfoWorld feature explores how Model Context Protocol (MCP) supports context engineering for AI-assisted coding.
A set of metal keys on a keyring resting on a wooden surface.

API keys don't equal security. Here are 10 reasons why.

By Bill Doerrfeld • May 22, 2026
My latest for Nordic APIs explores 10 API key security risks and what to use alongside keys for stronger API security.

MC'ing at apidays New York 2026

By Bill Doerrfeld • May 18, 2026
The yearly API conference, apidays New York, is a hotbed for solid discussion on what's top of mind in the API space, and as MC I had a front row seat.

Using agentic AI to accelerate sales teams

By Bill Doerrfeld • May 13, 2026
My latest for CIO Online features real results form CIOs actively deploying AI agents to empower sales and revenue teams.

Avoid hastily bolting AI into existing products

By Bill Doerrfeld • May 12, 2026
Reports say consumers are souring on AI everywhere, all the time. So, at the risk of losing trust, or even potential business, is adding AI to an existing product really worth it?