We Make Code Changes Verifiably Safe
BitDive captures real behavior from running Java and Kotlin services, then turns recorded executions into replay-based JUnit suites that prove your changes work. No mock scripts. No guesswork.
Runtime Verification Platform for Modern JVM Teams
Every day, engineering teams push code changes and hope they don't break anything. They write manual tests based on assumptions, maintain thousands of fragile mocks, and still miss regressions in production.
BitDive eliminates that uncertainty. We attach a lightweight agent to your Java or Kotlin services that records exactly what happened—every method call, SQL query, HTTP request, and Kafka message. Then we turn those recordings into executable JUnit tests that replay the exact same behavior.
The result: you verify every code change against what actually happened in your system, not what someone imagined might happen.
Capture
Zero-code agent records live execution context from any environment
Generate
Auto-create isolated JUnit tests with real data, real mocks, real assertions
Verify
Replay in CI/CD to detect regressions before they reach production
From Running Service to Verified Test Suite in Minutes
No SDK integration. No test scripts. Attach the agent, record behavior, generate tests.
Attach & Record
Add the BitDive Java agent to your service. It captures every method call, SQL query, HTTP request, and message queue interaction with minimal overhead.
Select & Build
Browse captured traces in the visual Service Map. Select any execution flow and build a replay-based JUnit suite from that execution. BitDive assembles the test assets with replayed boundaries.
Run & Verify
Run the replay-based tests with standard mvn test. They detect behavioral regressions, changed SQL patterns, altered API responses, and broken call sequences, not just compilation errors.
Built by Engineers Who Were Tired of Writing Mocks
We spent years building and testing complex distributed systems—Spring Boot microservices talking to Kafka, PostgreSQL, Redis, and dozens of internal APIs. We wrote thousands of mock-based unit tests. And we watched them fail to catch the bugs that mattered.
The problem was clear: mock-based tests verify assumptions, not reality. When a Kafka consumer changes its serialization format, when a SQL query returns a different column order after a migration, when a third-party API adds a new field—your mocks don't know.
"What if tests could replay what actually happened instead of what we imagined would happen?"
That question became BitDive. We built a platform that captures real runtime behavior and converts it into deterministic, isolated test scenarios that run anywhere without external dependencies.
Platform Launch
First public release of the BitDive agent and dashboard. JUnit test generation from recorded traces.
Service Map & Call Tree
Visual distributed tracing with deep call-tree inspection and method-level argument recording.
AI Runtime Context (MCP)
Exposed JVM execution context to AI coding agents via Model Context Protocol. Cursor, Claude, Windsurf integration.
35K+ Maven Downloads
Crossed 35,000 Maven Central downloads and 100+ trusted engineering teams.
Integration Testing
Full-stack integration testing for Spring Boot services. Full context, auto-stubbed boundaries from captured traces.
How We Think About Quality
These aren't abstract values. They're the technical decisions we make every day.
Reality Over Assumptions
Tests should be grounded in observed behavior, not imagined scenarios. Captured data is more reliable than hand-written fixtures.
Determinism by Default
Every replay-based test produces the same result on every run. No flaky tests, no environment-dependent failures, no "works on my machine."
No Manual Test Writing
The best test automation is the one you do not have to handcraft. BitDive builds replay-based suites from recorded behavior instead of forcing teams to maintain mock scripts and fixture code.
Standard Tooling
Generated tests are pure JUnit 5 code that runs with Maven or Gradle. No proprietary runners, no vendor lock-in, no new CLI to learn.
Minimal Overhead
The recording agent adds single-digit millisecond overhead. It's designed for staging and production, not just test environments.
AI-Native Verification
AI agents should verify their own code against reality. We provide runtime context via MCP so agents can self-correct before changes ship.
Built for the Modern JVM Stack
BitDive supports the frameworks and tools your team already uses.
Java 8–21
Kotlin
Spring Boot
JUnit 5
Maven
PostgreSQL
MongoDB
Kafka
TestcontainersCommon Questions
What does BitDive do?
BitDive captures real execution behavior from running Java and Kotlin services and turns recorded executions into replay-based JUnit suites. Tests replay actual SQL queries, HTTP calls, and Kafka interactions without manual mocking.
How is it different from Mockito?
Mockito requires you to guess what production data looks like. BitDive records real behavior from running services and builds replay-based suites from that evidence instead of relying on hand-written mock scripts.
Do I need to change my code?
No. BitDive uses a Java agent that attaches to your service at startup. No SDK, no annotations, no code modifications. Generated tests are standard JUnit 5.
What about performance overhead?
The recording agent adds single-digit millisecond overhead per request. It's designed for staging and production environments, not just local development.
Can AI agents use BitDive?
Yes. BitDive exposes runtime context (call stacks, SQL queries, variable states) to AI coding agents via the Model Context Protocol (MCP) for tools like Cursor and Claude.
What JVM versions are supported?
Java 8 through 21, Kotlin, Spring Boot 2.x and 3.x, plus the currently documented JDBC, HTTP, Kafka, datastore, SOAP, and JVM metric surfaces listed in Technology Coverage.
See It Working in Your Environment
Attach the agent. Record your first trace. Generate JUnit tests in 5 minutes.