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Build TriNet API Integration Faster with Finch

About TriNet (fka Zenefits)

TriNet is a professional employer organization (PEO) that provides small and mid-size businesses with full-service HR solutions. Known for its user-friendly interface, TriNet is considered a top-rated payroll and HR management tool by TrustRadius.

Employer Size
1-1,000 employees
Employer Count

Powering integrations for hundreds of platforms

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Why developers love building with Finch

Market-leading coverage

Instantly support 180+ systems (and counting) compatible with our normalized data structure and as we add new systems, turn them on with one click.

Enterprise-grade security

Trust Finch’s infrastructure that enforces TLS 1.2 for data in transit and encrypts data at rest using AES 256 bit encryption.

Read and write functionality

Seamlessly read company, census, and payroll data, while writing deductions and benefits contributions changes directly into the source of truth.

Best in class developer experience

Integrate Finch in hours with just a few lines of code and turn on the ability sync data with employers in as little as 30 seconds.

compatible systems
daily API calls
employers connected
U.S. employers covered

Unified API

One API to unite every provider

Finch standardizes employment data across every provider. So you don't have to.


What percentage of the market uses TriNet?

Given that TriNet boasts over 22,000 customers, and there were 6.1 million employers in the United States as of 2019, TriNet is estimated to serve 0.36% of the U.S. market.

How can I access the employment data in TriNet?

To access your customers’ employment data in TriNet, you have two options: 

  1. Build a custom 1:1 integration with TriNet via its public APIs, which enable automatic data sharing between the two apps.
  2. Build a single integration with Finch to access the employment data housed in TriNet plus more than 200 other employment systems.

Does TriNet have a public API?

TriNet offers five APIs to authenticated customers and developers, who want to build solutions that require data about employees, companies, payroll, money, and time off. Read about TriNet’s APIs.

You must be approved during the sign-up process and subsequently apply for API keys. Typically, third-party developers must both pass technical requirement checks and invest in business development efforts.

How long does it take to build TriNet integration?

That largely depends on the integration method you choose. 

If you use Finch’s unified API to access the employment data in TriNet (alongside over 200 other HRIS and payroll systems), it can take as little as a few days. See our quickstart guide for more information.

If you instead decide to build a 1:1 integration leveraging TriNet’s public APIs, it can take weeks to months to receive your production keys. See TriNet's developer portal for more information.

Where can I find developer documentation and support?

If you’re building a 1:1 integration using TriNet’s public APIs, the company’s developer portal is the best place to start. That’s where you’ll find technical guides, API references, and the company’s changelog. 

If you’re integrating with TriNet via Finch’s unified API, navigate to our API docs. There, you’ll find a product demo, quickstart guide for developers, integration checklist, and product and developer guides, along with best practices to follow.

Of course, if you have any questions, we’d be happy to help answer them. Send your requests to

When does it make sense to leverage a unified employment API?

Unified employment APIs help developers access data from payroll and HRIS systems employers use. Specifically, these APIs are useful for accessing data from a broad range of employment systems or collecting detailed information about their customers’ payroll and benefits plans. If your use case requires integrations with three or more employment systems, a unified employment API could save you hundreds of engineering hours and developer resources. 

Through a single integration, you can connect with over 200 employment systems (including TriNet)—unlocking up to 88% of the employer market. Once authorized by the employer, you’ll receive fresh data every 24 hours. From enterprise-grade security to read and write capabilities, Finch offers compelling benefits to employer-facing businesses of all shapes and sizes. Learn more

Check out our API docs for more info

Customer Stories

You’ll be in good company

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Access the global employment ecosystem

Create a best-in-class experience for your users today.

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