Freedom251 › Integrated Development Environments
EiffelStudio
What EiffelStudio is
EiffelStudio is an integrated development environment for building software in the Eiffel language on Linux, macOS, and Windows. It brings design, implementation, testing, deployment, and maintenance into one workflow, with an integrated debugger, testing tools, and build tools. Design by Contract support checks preconditions, postconditions, and invariants automatically through its tools. The AutoTest component generates test cases, can turn failed executions into regression tests, and accepts manually added tests. Eiffel’s stated language characteristics include strong static typing, dynamic binding, void safety, multiple inheritance, and genericity. EiffelStudio can call C functions, access C++ classes, and expose Eiffel mechanisms to C or C++ through the Cecil library. It can generate XMI information for compatible products. A free plan is available; paid plans start at $16.50/mo. Personal licenses are non-commercial, while Professional licenses allow commercial use.
Who it suits
EiffelStudio suits solo programmers and teams developing systems where correctness matters, including mission-critical, safety-relevant, financial, infrastructure, or complex evolving software. It also fits Eiffel developers who need integrated testing and contract checks.
What it does well
- Runs on Linux, macOS, and Windows
- Automatically checks contracts
- AutoTest generates and records tests
- Includes debugger, testing, and build tools
- Free plan available
What to know first
- Personal licenses prohibit commercial use
- Professional plan limited to two licenses per organization
- Support covers only two major releases
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| Startup bundle — 1 platform | 3-license package · compiler, EiffelStudio IDE, libraries, code analyzer · 1 simultaneous device per user · installed on 1 device per user · 3 months support · max one bundle per organization | $144.50 a month |
| Startup bundle — 1 platform | 3-license package · compiler, EiffelStudio IDE, libraries, code analyzer · 1 simultaneous device per user · installed on 1 device per user · 3 months support · max one bundle per organization | $1,445, paid once |
| Personal — 1 platform | Non-commercial use · compiler, EiffelStudio IDE, libraries, limited code analyzer · 1 simultaneous device · installed on 1 device · 1 month support | $16.50 a month |
| Personal — 1 platform | Non-commercial use · compiler, EiffelStudio IDE, libraries, limited code analyzer · 1 simultaneous device · installed on 1 device · 1 month support | $165, paid once |
| Professional — 1 platform | Commercial use permitted · compiler, EiffelStudio IDE, libraries, code analyzer · 1 simultaneous device · installed on 2 devices · 3 months support · max 2 licenses per organization | $54.50 a month |
| Professional — 1 platform | Commercial use permitted · compiler, EiffelStudio IDE, libraries, code analyzer · 1 simultaneous device · installed on 2 devices · 3 months support · max 2 licenses per organization | $545, paid once |
As eiffel.com lists them, read 9 Oct 2026. The maker's own page has the final word.
Verdict
EiffelStudio combines Eiffel development, contract checking, testing, debugging, and building in one environment. Its free plan and cross-platform support broaden access, while licensing and support limits matter for commercial teams.
Facts from EiffelStudio's own pages
- Automatic testing
- Its AutoTest component generates test cases, extracts regression tests from failed executions, and lets users add manual tests. · eiffel.com, 9 Oct 2026
- Design by Contract
- The IDE supports preconditions, postconditions, and invariants that are part of the language and checked automatically by its tools. · eiffel.com, 9 Oct 2026
- Development workflow
- EiffelStudio presents design, implementation, testing, deployment, and maintenance as a continuous workflow in one language and environment. · eiffel.com, 9 Oct 2026
- Founded
- 1985 · eiffel.com, 28 Sept 2026
- Free access
- The maker says EiffelStudio is free for students and professors through its University Partnership Program, and active community contributors may qualify for a no-charge license. · account.eiffel.com, 9 Oct 2026
- Integrations
- Eiffel supports calling C functions, accessing C++ classes from Eiffel, and exposing Eiffel mechanisms to C or C++ through the Cecil library. · eiffel.com, 9 Oct 2026
- Intended users
- The maker positions EiffelStudio for solo programmers and teams focused on correctness, including users building mission-critical, safety-relevant, financial, infrastructure, and evolving complex systems. · eiffel.com, 9 Oct 2026
- Interchange
- EiffelStudio can generate XMI information for Eiffel systems for exchange with products that support the standard, such as IBM Rational Rose. · eiffel.com, 9 Oct 2026
- Language features
- The product describes strong static typing, dynamic binding, void safety, multiple inheritance, and genericity as key characteristics. · eiffel.com, 9 Oct 2026
- Licensing limits
- Personal licenses are for non-commercial use, while the Professional license permits commercial usage and is limited to two licenses per organization. · account.eiffel.com, 9 Oct 2026
- Platforms
- The system requirements page lists Windows, Linux, FreeBSD, Solaris, VxWorks, and Mac OS X as supported platforms, with other ports available on request. · eiffel.com, 9 Oct 2026
- Product
- EiffelStudio is an integrated development environment for developing software with the Eiffel language. · eiffel.com, 9 Oct 2026
- Support
- Support options include web-based issue submission, email support, and higher-priority phone and online meeting support; support is limited to the current major release and one major release back. · eiffel.com, 9 Oct 2026
Where EiffelStudio stands on Freedom251
- Integrated Development Environments#17 of 65