---
name: Pact
domain: pact.io
kind: product
relation: substitute
segment: Web Application and Frontend Hosting Platform
descGrounded: 0.5
---

# Pact

A contract testing tool for microservices and APIs, sold as open-source software and a managed platform (PactFlow) to development teams.

**Route:** surfaced by the Web Application and Frontend Hosting Platform lane's de-branded queries → substitute to vercel.com.

**Why it's on the map:** A development team that adopts Pact's contract testing approach can eliminate the end-to-end test environments and integration suites that Vercel's platform helps build and deploy, making Vercel unnecessary for that part of the workflow.

**Receipts** (verbatim from its page this run):

> Fast, easy and reliable testing for integrating web apps, APIs and microservices

> Reduce (or removing entirely) the need for complex, costly and hard-to-manage integration test environments

> Pact provides a guarantee that systems are compatible, so you can deploy your microservices and web apps independently and safely
