Pact

Pact is ranked #5 of 35 in API testing tools on The Geeks Club. It runs on API, Linux, macOS, Self-hosted, Windows. There is a free plan. A free trial is offered. Paid plans start at $115.42/mo.

Pact plans and pricing

All plans

Pact open-source tooling Free The official site presents Pact as open-source tooling and links to GitHub; it does not state a price. Open-source contract testing tools · a Pact Broker must be hosted and operated separately for shared contract workflows pact.io · 4 Oct 2026

PactFlow Starter Free FREE Unlimited users · 2 integrations · Bi-Directional Contract Testing pactflow.io · 4 Oct 2026

PactFlow Team (yearly) $115.42/mo USD per month (billed yearly as $1,385) 50 integrations · Community support · Bi-Directional Contract Testing · GitHub and Google Login · 14-day free trial pactflow.io · 4 Oct 2026

PactFlow Team (monthly) $127/mo USD per month 50 integrations · Community support · Bi-Directional Contract Testing · GitHub and Google Login · 14-day free trial pactflow.io · 4 Oct 2026

PactFlow Enterprise Not published Contact Sales Advanced user and security management · Dedicated support · SaaS or on-premise deployment pactflow.io · 4 Oct 2026

Compared on API testing tools

Free plan: Yes
Mock server: Yes

Best Pact alternatives

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8.0 Apidog Free plan

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7.9 Bruno Free plan

7.9 Kreya Free plan

7.8 Insomnia Free plan

7.6 PactFlow Free plan

Pact

Purpose: Pact is a code-first tool for testing HTTP and message integrations with contract tests.
How contracts work: Pact contracts are generated by automated consumer tests and describe concrete interactions between consumer and provider applications.
Testing workflow: Pact lets teams test consumer and provider applications in isolation without deploying the entire system.
Languages: The Pact site lists implementations for JavaScript, Java and JVM languages, .NET, Go, Python, Swift and Objective-C, Ruby, PHP, and C++.
Broker: The open-source Pact Broker shares contracts and verification results; it can be self-hosted and administered by the user.
CI/CD: The Pact Broker supports CI/CD workflows, including compatibility checks that indicate whether application versions can be deployed together.
Integrations: Pact documentation provides recipes for scenarios and tools including GraphQL, Cypress, Jest, Mocha, Kafka, AWS Lambda, and API Gateway.
Messaging: Pact abstracts message testing from the queueing technology and documents examples involving ActiveMQ, RabbitMQ, SNS, SQS, Kafka, and Kinesis.
Intended users: Pact is most valuable when teams control development of both consumer and provider applications, and is generally implemented by developers.
Not suitable for: Pact documentation says it is not intended for performance or load testing, provider functional testing, or APIs whose many consumers cannot maintain direct relationships with the provider team.
Security distinction: The Pact site describes SSO, API tokens, audit trails, and secrets as premium PactFlow features rather than core Pact features.
Support: The Pact site links to documentation, a Slack community, and partners for support.
Testing model: Pact contract tests check integrations in isolation against a shared understanding documented in a contract.
Language support: Pact implementations are available in more than 10 languages, including Java, Rust, JavaScript, .NET, Go, PHP, Python, Ruby, Swift/Objective-C, Scala and C++.
Price from: $115.42/mo

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Where it ranks on The Geeks Club

Best API Testing Tools in 2026#5 of 35
Best Integration Testing Tools in 2026#2 of 26
Best API Design Tools in 2026#2 of 26
Best Contract Testing Tools in 2026#2 of 22

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Sources

docs.pact.io· checked 3 Oct 2026
pact.io· checked 3 Oct 2026
docs.pact.io/pact_broker· checked 3 Oct 2026
docs.pact.io/recipes· checked 3 Oct 2026
docs.pact.io/getting_started/how_pact_works· checked 3 Oct 2026
docs.pact.io/faq· checked 3 Oct 2026
docs.pact.io/implementation_guides/overview· checked 4 Oct 2026
docs.pact.io/implementation_guides/cli· checked 4 Oct 2026
pactflow.io/security/· checked 4 Oct 2026
pactflow.io/pricing/· checked 4 Oct 2026