CircleCI API vs Travis CI API

Two free Continuous Integration APIs compared on access, reliability and developer ratings, using data from our daily health checks.

The verdict

Choose CircleCI API if its data fits your use case better; on access and reliability it's level with Travis CI API.
Choose Travis CI API if its data fits your use case better; on access and reliability it's level with CircleCI API.

	CircleCI API	Travis CI API
What it does	Automate the software development process using continuous integration and continuous delivery.	Sync your GitHub projects with Travis CI to test your code in minutes.
Provider	CircleCI	Travis CI
API key	Required	Required
HTTPS	Yes	Yes
CORS (browser calls)	Unknown	Unknown
Status today	Online · 1182 ms	Online · 999 ms
Uptime (30 days)	Up	Up
Developer rating	Not rated yet	Not rated yet
Price	Free / free tier	Free / free tier

Automate the software development process using continuous integration and continuous delivery.

Introduction to the CircleCI API versions and their capabilities including a how to choose the right API version for your use case.

Strengths

Sync your GitHub projects with Travis CI to test your code in minutes.

Strengths

Prototyping or a tutorial? Pick the one that needs no API key (neither does, so compare their free tiers).
Calling from a web page? You need CORS. Otherwise route requests through your own server or a serverless function.
Going to production? Favour HTTPS, a strong uptime record and a provider with clear rate limits and terms. Check each API's docs before you commit.
Still unsure? Both are free to try: send one request to each and compare the data you get back.

Both require authentication (apiKey and apiKey).