Contract Testing Tool for Microservices, APIs and Kafka
Deployagram is a contract testing tool for microservices, HTTP APIs and Kafka. It instruments your existing service tests so you can prove compatibility between services, see what changed, and avoid relying on shared end-to-end environments.
No new tests. No DSL. Just instrument your existing service tests.
Why Deployagram is different from other contract testing tools
No new contract DSL to learn
Deployagram does not ask teams to maintain a separate contract language. It instruments the functional service tests you already trust.
No duplicate test effort
Many contract testing tools introduce another layer of tests to write and maintain. Deployagram reuses existing service tests to produce contract evidence.
See compatibility clearly
Instead of digging through logs and JSON, teams can see contract checks, sequence diagrams and diffs that explain what changed.
Why teams choose Deployagram as their contract testing tool
Faster feedback than end-to-end testing
Catch integration problems at service boundaries in seconds, without relying on shared environments or coordinating multiple service deployments.
Visual contract testing
See interactions, payloads and compatibility rather than guessing from logs, raw JSON or scattered test output.
Reuse the tests you already have
Deployagram instruments your existing functional service tests, so you can generate useful contract evidence without inventing a separate testing layer.
Works with APIs and microservices
Verify HTTP API communication between services so teams can change one application without accidentally breaking another.
Supports Kafka contract testing
Cover asynchronous communication too. Check that Kafka producers and consumers still work together across versions and environments.
Evidence you can share
Show engineers, stakeholders and auditors what was tested, what changed and whether services remain compatible.
Contract testing for microservices without shared environments
Microservices only deliver their full value when teams can deploy independently. If release confidence depends on a shared environment and end-to-end testing across multiple services, that advantage disappears.
Deployagram helps teams prove compatibility directly at service boundaries. That makes it a better fit than shared-environment testing when you want genuine independent deployability.
Contract testing for Kafka and event-driven systems
Event-driven microservices rely on producers and consumers staying compatible as services evolve. A small change to an event can silently break downstream systems.
Kafka contract testing helps teams prove that those services still work together, without relying on shared end-to-end environments or coordinating deployments.
No new tests. No DSL. Just instrument your existing service tests.
See whether your services will work together
Deployagram helps you verify service compatibility across versions and environments. Instead of relying on release trains, shared environments and manual checking, you can run contract checks and see the result clearly.
That means safer changes, more confident deployments and far less guesswork.
Don’t just read tests. Watch them.
Deployagram turns automated tests into sequence diagrams so your team can see what really happened when tests ran. That makes behaviour easier to understand, explain and debug.
See what changed between versions
Sequence diagram diffs help you spot what has gone, what has changed and what is new. Use them to understand the impact of a release before it becomes a production problem.
Understand your architecture faster
Join the dots across front-end and back-end applications with living diagrams that help teams onboard faster and understand how systems really fit together.
Built for modern systems that need contract testing
Microservices without release trains
Independent deployability breaks down when teams rely on shared environments. Contract testing lets teams prove compatibility without coordinating releases.
Support better delivery performance
Faster feedback and fewer breaking changes can improve deployment frequency, lead time and change failure rate.
Living documentation
Use real test evidence and diagrams as living documentation rather than static documents that drift out of date.
New to contract testing tools?
Learn the basics
Start with our guide to contract testing and understand why contract testing tools help teams move faster with less risk.
Integrate with your delivery pipeline
Use the API and tooling to connect Deployagram to your CI/CD flow and build your own dashboards if needed.
Get up and running quickly
Instrument your existing service tests and start generating useful diagrams and compatibility checks without a heavy setup.
Frequently asked questions about contract testing tools
What does a contract testing tool do?
A contract testing tool helps teams verify that two services can still communicate correctly by checking compatibility at the boundary between them.
Why use a contract testing tool for microservices?
Because it supports independent deployability. Teams can prove compatibility between services without relying on shared end-to-end environments.
Can contract testing tools work with Kafka?
Yes. Deployagram supports Kafka contract testing as well as HTTP API contract testing, helping teams cover both synchronous and asynchronous communication.
Do contract testing tools require more tests?
Some do. And they require you to learn a new DSL and maintain additional tests. Deployagram is different because it instruments existing functional service tests instead of introducing a separate contract language and duplicate test suites.
See contract testing more clearly
Get in touch to try Deployagram as your contract testing tool for microservices, HTTP APIs and Kafka.