DeepSource vs Joern

DeepSource is an AI code review platform for teams writing code with AI. It reviews pull requests through static analysis and an AI review agent, looking for bugs, anti-patterns, and security vulnerabilities. The review process uses more than 5,000 deterministic rules, while Autofix can provide verified, pre-generated patches for many detected issues. Other checks include secrets detection, open-source dependency vulnerability scanning, and infrastructure-as-code review for Terraform and CloudFormation. Teams can track code coverage and set thresholds for tested code. Supported version-control systems include GitHub, GitLab, Bitbucket, and Azure DevOps; listed integrations also include Jira, Okta, OneLogin, Slack, and Vanta. The service is available through web, API, Linux, macOS, Windows, and self-hosted deployment. Its GraphQL API has a documented limit of 5,000 requests per hour per user. The Open Source tier costs nothing and includes unlimited public repositories and members, plus monthly limits for reviews and formatting runs. Team costs $24 a year, billed yearly, with a stated rate of $24 per user per month. A 14-day trial is available. Enterprise uses custom pricing and offers cloud or self-hosted deployment, among other listed features.

Joern analyzes source code, bytecode and binary code for vulnerability discovery and static program analysis research. It converts programs into code property graphs, providing a common structure for cross-language analysis. Users query those graphs with a strongly typed, extensible Scala-based domain-specific language. Features include parsing, taint analysis, search queries and passes that extend the graph representation. Joern Scan runs predefined queries and reports matching issues with their locations; queries can be selected by tag or name, and community contributions are accepted in the default database. Queries can be wrapped into custom scanners for CI. Joern also works as a library or through REST and HTTP APIs, including a server for graph construction and querying. Documented frontends cover C, C++, C#, Go, Java, JavaScript, Kotlin, PHP, Python, Ruby, Swift, x86/x64 and JVM bytecode, with varying maturity. Distributions target Linux, macOS and Windows on x86_64 and ARM64. Joern is free, Apache-2.0 licensed and requires JDK 21.