API Contract Tester
6.6#9 in contract testing toolsFrom $19 a monthFree planWeb
VisitAPI Contract Tester vs PactFlow
What both publish
| Fact | API Contract Tester | PactFlow |
|---|---|---|
| Purpose | API Contract Tester verifies frontend-backend API contracts and detects schema mismatches, missing fields, and type incompatibilities. | PactFlow is a managed Pact Broker that helps teams test integrations in distributed systems using contract testing. |
API Contract Tester plans
- FreeFree
- Individual Dev$19 a month
- Pro AI Agent$49 a month
- Enterprise$499 a month
PactFlow plans
- StarterFree
- Team yearly$115.42 a month
- Team (yearly billing)$115.42 a month
- Team monthly$127 a month
- Team (monthly billing)$127 a month
- EnterprisePriced on request
Pick API Contract Tester if…
It suits frontend and backend teams that want to verify responses against agreed schemas. Developers can use the web tool, a local MCP server, or pipeline checks.
Pick PactFlow if…
PactFlow suits development teams that need to check service contracts and connect those checks to source-control workflows. It also offers an on-premises option and dedicated support for Enterprise customers.