StopLight, a TechStars Alum, Launches API Designer To The Public

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After Successful Beta, Austin-based Startup Continues Push for More Design Thinking in API Development

StopLight, a 2015 graduate of Techstars Austin, is launching its visual API design tools today after working with nearly 300 companies over three months in private beta. StopLight’s powerful modeling environment provides a frictionless way for teams to accelerate and automate their API strategy.

Every mobile app, IoT device, and web service is powered by API technology. As business drivers increasingly depend on robust APIs, accessibility and collaboration are evermore critical. According to Forrester, API management spend on products like StopLight will quadruple to $3 billion over the next 4 years.

“I’m an engineer, and StopLight is the solution to problems I faced repeatedly,” says StopLight founder Marc MacLeod. “Before StopLight, best practices were very manual — with no easy way to document and test APIs in an accessible, collaborative setting. StopLight changes this paradigm.”

According to Matt Bernier, lead Developer Experience Manager at SendGrid, which processes billions of API calls per month, StopLight is “dead simple to use”. His recent blog post describes how StopLight makes development teams more productive than ever. Beta customers ranging from early-stage startups to public market leaders, reported similarly powerful results.

While existing tools like Apiary and SwaggerHub require an understanding of specifications such as OAI, RAML, and JSON, StopLight’s model-centric approach means a broader range of people working with the API can contribute and extract maximum value. The impact is vast, touching QA, product management, customer support, partners, and outside developers.

StopLight’s solution is built around three core features:

  • API Designer. A modern, collaborative API modeling tool, built around existing open standards.
  • Prism Proxy. A lightweight, dependency free API proxy, built to manipulate HTTP traffic, and configurable via simple JSON files.
  • Documentation. A brand new hosted documentation product, Always up to date, and built automatically. Publish any API out to the world.

StopLight is available to download here. Individual developers can download and use the API Designer for free, and team pricing starts at $8 a month/member.

StopLight, headquartered in Austin, TX, is an API modeling and workflow management solution. The company was founded in 2015, and is a graduate of Techstars. More info available at or by contacting press(at)stoplight(dot)io.

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Marc MacLeod
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