ModelSim FPGA editions and their successor products have changed names and licensing requirements.
Existing projects may need simulator-setting updates, and a free successor edition may still require a no-cost license file.
Evidence source ↗
ModelSim
ModelSim is a desktop HDL simulator and debugging environment used to verify FPGA designs. Its editions support different HDL languages, features, and vendor workflows.
5 key claims verifiedOur editorial team checked this profile against vendor documentation, product documentation, supporting sources. Supported by 5 documented sources.
Editorial overview
Aggregated Overview
Official product material documents simulation, waveform debugging, coverage, and assertion-based verification. Current pricing and a sufficiently broad public review sample were not verified, so value, support, and sentiment assessments remain uncertain.
This profile combines documented product information and independent evidence where available. It is not a hands-on test unless TechZella explicitly identifies one.
Overview
ModelSim is a hardware description language simulator and debug environment associated with Siemens EDA. Its documented workflow supports simulation and verification of FPGA designs, with capabilities that vary by edition.
Buyers should distinguish the commercial Siemens product from FPGA-vendor editions. Altera replaced its Intel FPGA edition with Questa, while Microchip documents ModelSim ME Pro as part of its Libero environment.
ModelSim Decision Snapshot
A quick way to understand who this product may suit, where its limits matter, and which facts are most relevant before you compare alternatives.
Best suited to
FPGA developers who need a desktop HDL simulation and waveform-debug workflow, particularly teams maintaining existing ModelSim projects or using vendor-specific editions.
Look elsewhere if
Teams starting an Altera FPGA workflow should check current Questa-Altera guidance instead: the older ModelSim FPGA edition is no longer valid in current Quartus project settings, and should evaluate alternatives such as Vivado Simulator or Aldec Active-HDL instead.
Platforms
Linux, Windows
TechZella assessment
5.8/10
ModelSim — What Sets It Apart?
These are the product-specific differences that may matter when deciding whether the software fits your workflow. They are based on documented evidence rather than a universal ranking.
- Siemens documentation describes coverage metrics for statements, expressions, conditions, toggles, and finite-state machines, alongside assertion-based verification.
- Vendor-specific ModelSim editions have been embedded in FPGA development environments, including Microchip Libero; their availability and license terms vary by edition.
ModelSim Pros & Cons
Pros
- Official documentation describes coverage metrics and assertion-based verification.
- Can integrate with FPGA design environments, including documented Vivado and Libero workflows.
- Product documentation describes waveform debugging for HDL simulation.
Cons
- Features, platform support, and licensing depend on the specific edition.
- The Altera Intel FPGA edition has been replaced by Questa.
- Current standalone pricing and a free trial were not verified.
ModelSim Gotchas & Operational Limits
These are documented constraints or practical friction points that may matter before you adopt the product.
Microchip says ModelSim ME integration was discontinued in Libero starting with v2021.2, while ModelSim ME Pro remained bundled.
Buyers need to confirm the exact simulator edition included with their Libero release rather than assuming every ModelSim variant is available.
Evidence source ↗ModelSim Pricing & Plans
ModelSim commercial editions
Current pricing was not publicly verified. Contact Siemens EDA or the relevant OEM for edition-specific licensing information.
Check current pricing →Pricing may change. Verify current plans on the vendor's website.
ModelSim Competitors & Alternatives
Compare similar products directly, then see which alternatives may make more sense when your requirements differ.
At a glance
Developer Tools| Decision factor | ModelSim | Vivado Simulator | GHDL |
|---|---|---|---|
| HDL and simulation scope | ModelSim's documented features include HDL simulation, waveform debugging, code coverage, and assertion-based verification. | Vivado Simulator supports functional and timing simulation for VHDL, Verilog, SystemVerilog, and mixed-language designs. Source ↗ | GHDL is a free, open-source VHDL analyzer, compiler, and simulator; it does not provide a built-in graphical waveform viewer. Source ↗ |
| Platform and workflow | The Siemens brochure lists Windows and Linux for its documented ModelSim release; Vivado can launch ModelSim as a third-party simulator. | Vivado Simulator is integrated with the Vivado IDE and includes AMD simulation libraries. Source ↗ | GHDL runs on GNU/Linux, Windows, and macOS and produces waveform files for use with external viewers. Source ↗ |
Only factors supported by the available research are shown. The comparison is descriptive, not a ranking.
Direct competitors
These products address broadly similar requirements. The descriptions focus on documented reasons a buyer might compare them with ModelSim.
Vivado SimulatorVivado Simulator supports functional and timing simulation for VHDL, Verilog, SystemVerilog, and mixed-language designs.
ModelSim Features
Simulation and verification
- HDL simulation
- Statement, expression, condition, toggle, and FSM coverage documented in Siemens brochure
- SystemVerilog Assertions and PSL support documented in Siemens brochure
Debugging
- Waveform-oriented debugging
- Project and library management described in Siemens brochure
Integrations
- Vivado can launch ModelSim as a third-party simulator
- ModelSim ME editions are integrated with Microchip Libero SoC
Demo & Screenshots
ModelSim Specifications
| Software type | HDL simulation and verification |
|---|---|
| Documented languages | VHDL, Verilog, SystemVerilog |
| Documented operating systems | Windows and Linux in the 2019 Siemens brochure; verify support for the specific edition |
| Deployment | Desktop installation; some OEM editions are installed with FPGA design suites |
| API | |
| Free trial | Not verified |
| Pricing | Current public price not found |
Deployment & System Footprint
Verified installation, hosting, administration, or environment details that can affect implementation.
| Installation or hosting | The Siemens brochure describes Windows and Linux desktop software. Microchip documents ModelSim ME and ModelSim Pro ME as installed with Libero SoC, not as standalone current downloads. Source ↗ |
|---|
Migration & Lock-In
Documented portability, standards, export, or switching considerations. No switching-cost score is shown unless the evidence supports one.
Altera FPGA edition
Altera announced the replacement of ModelSim-Intel FPGA Edition with Questa-Intel FPGA Edition in 2021. Current documentation identifies the successor as Questa-Altera FPGA Edition and notes changes to project settings and signal preservation.
Evidence source ↗Our evidence-based assessment
TechZella Score
A proprietary editorial score based on product capabilities, usability, value, performance, support and user sentiment evidence.
5.8/10Low confidence
Official product material documents simulation, waveform debugging, coverage, and assertion-based verification. Current pricing and a sufficiently broad public review sample were not verified, so value, support, and sentiment assessments remain uncertain.
Methodology v1.0. The assessment weighs feature coverage (25%), ease of use (15%), value for money (20%), performance (15%), support (10%) and user sentiment (15%), using researched product evidence and verified review evidence where available. It is a TechZella editorial assessment, not a direct user-review average.
Editorial transparency
Our Review Methodology
Key claims are linked to the sources used to verify them. This evidence record is separate from third-party user ratings.
TechZella evaluates software using documented product capabilities, pricing information, usability and value considerations, independent user evidence where available, and competitive context. The assessment is an editorial review, not a hands-on test unless one is explicitly identified. Our editorial assessment is based on 5 documented sources.
What TechZella adds
- Siemens documentation describes coverage metrics for statements, expressions, conditions, toggles, and finite-state machines, alongside assertion-based verification.
- Vendor-specific ModelSim editions have been embedded in FPGA development environments, including Microchip Libero; their availability and license terms vary by edition.
Important limitations
- ModelSim is an edition-dependent product family, not one consistent current license or feature set.
- The ModelSim-Intel FPGA Edition was replaced by Questa-Intel FPGA Edition; current Altera documentation says Quartus replaces the old simulator setting with Questa-Altera FPGA Edition.
- The Siemens brochure's listed operating systems describe an older release and should not be treated as current support information.
Evidence-backed claimsModelSim provides HDL simulation, coverage, and assertion-based verification features. ModelSim-Intel FPGA Edition was replaced by Questa-Intel FPGA Edition. Current Altera Quartus project settings replace the old ModelSim FPGA edition with Questa-Altera FPGA Edition. Microchip bundles ModelSim ME and ModelSim Pro ME with Libero SoC rather than offering current standalone installations. Vivado can use ModelSim as a third-party simulator.
The Siemens product brochure describes code coverage metrics and support for SystemVerilog Assertions and PSL.
View source ↗Verified 2026-11-10Altera's customer advisory describes the replacement and says prior ModelSim FPGA editions continued to be available for download at the time.
View source ↗Verified 2026-11-10Altera's current documentation explains the replacement behavior and identifies differences in signal preservation and executable settings.
View source ↗Verified 2026-11-10Microchip's ModelSim page states that the editions are installed with Libero SoC and are not available as standalone installations.
View source ↗Verified 2026-11-10AMD documentation says users can launch ModelSim and Questa from the Vivado IDE.
View source ↗Verified 2026-11-10FAQ
See the buyer questions below for verified answers about pricing, supported languages, Altera migration, and integration with Vivado.
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