BullseyeCoverage vs Coveralls

BullseyeCoverage measures C and C++ code coverage to help developers and testers locate untested code and assess testing completeness. It provides function coverage and condition/decision coverage, and results can be viewed interactively in Coverage Browser or generated as reports. Listed outputs include HTML, text, annotated source code, XML, Cobertura, and CSV. The tool instruments C and C++ source code and supports standard C++ versions from C++98 and C versions from C90 through current versions, plus compiler extensions. Coverage data can be exported in XML or CSV, and results from multiple computers can be merged. Supported tools include Visual Studio, Clang, GCC, Xcode, CMake, Eclipse, and embedded development tools such as Code Composer Studio. Supported environments include Windows, Linux desktop and server, macOS, and embedded systems. The company reports that instrumented execution takes 1.3–1.9× longer and code and data size increase to 1.4×; build-time effects vary by compiler. A temporary, fully functional evaluation license costs nothing and expires at the end of its evaluation period. The perpetual paid license has no listed price.

Coveralls analyzes software test coverage, showing teams which code is not covered by tests. Its dashboard presents project coverage percentages and their changes over time, while repository views drill down from a project to sub-projects, files, and individual lines. Build history tracks coverage across branches, including pull requests. Coveralls can add summarized coverage results to pull requests and send status updates that apply coverage criteria to merge decisions. Notifications can go to Slack or webhooks. It supports line and branch coverage, with report formats including LCOV, SimpleCov, Cobertura, JaCoCo, and Clover XML. Coveralls says it works with any CI service and lists more than 30 community-created integrations, a GitHub Action, and a CircleCI Orb. An API can add repositories programmatically and return recent build statistics. Open-source and public repositories are free. The Starter plan is $10 a month for one private repository and includes a 30-day trial. A self-hosted enterprise installation can operate within existing security controls without outbound network access.