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Qucs-S alternatives: 4 apps ranked by verified data

Facts checked Nov 8, 2026AppBreakup editorialHow we rankAll electronics design software

Top picks

Common reasons people leave Qucs-S: needs an external simulator backend to do anything, and no PCB layout, so board design needs a separate tool. We ranked 4 alternatives by how directly each one replaces Qucs-S, then by reviews, real visits and how recently each app's facts were checked against its own website. Altium Designer currently ranks first.

Quick comparison

#AppPricingVerified priceOpen sourcePlatformsVerified factsScore
1Altium Designer logoAltium DesignerPaid—NoWindows5 of 576.8
2Proteus Design Suite logoProteus Design SuitePaid—NoWindows5 of 574.4
3KiCad logoKiCadOpen source—YesWindows, macOS, Linux5 of 568.8
4EasyEDA logoEasyEDAFree—NoWeb, Windows, macOS +15 of 564.8
  1. Altium Designer logo

    1. Altium DesignerTop pick

    Best for: Professional hardware teams designing complex, high-speed or rigid-flex boards

    PaidWindows

    76.8

    score / 100

    Why switch from Qucs-S

    Commercial suite with built-in mixed-signal simulation for teams doing professional board design.

    Pros

    • Handles complex high-speed, HDI and rigid-flex designs
    • Schematic, layout and simulation share one data model
    • Cloud collaboration with version history and shared libraries
    • Widely used, so experienced designers are easy to find

    Cons

    • Expensive subscription, priced through sales
    • Windows only
    • Overkill for hobby and simple boards
    Visit Altium Designer Details and reviews
    How this score is calculated
    Editorial fit ×0.377
    Reviews ×0.363
    Clicks (90 days) ×0.15100
    Freshness ×0.15100
    Votes ×0.150

    0 counted reviews, 0 up and 0 down votes. Full formula

    Is Altium Designer a good Qucs-S alternative?

    Verified facts

    5 of 5 verified
    Platforms
    Windows (64-bit)
    Checked Nov 8, 2026altium.com(opens source in a new tab)
    Simulation
    SPICE and signal integrity
    Checked Nov 8, 2026altium.com(opens source in a new tab)
    Rigid-flex
    Yes
    Checked Nov 8, 2026altium.com(opens source in a new tab)
    Co-authoring
    Multiple engineers on one PCB
    Checked Nov 8, 2026altium.com(opens source in a new tab)
    Students
    Free access
    Checked Nov 8, 2026altium.com(opens source in a new tab)
  2. Proteus Design Suite logo

    2. Proteus Design Suite

    Best for: Students and embedded engineers who want to simulate microcontroller firmware with the circuit

    PaidWindows

    74.4

    score / 100

    Why switch from Qucs-S

    Commercial suite that simulates microcontroller firmware alongside the analog and digital circuit, then lays out the PCB.

    Pros

    • Co-simulates MCU firmware with SPICE circuits
    • Perpetual licences you keep without paying maintenance
    • Large simulation model and part library
    • Modular packages, so you buy only what you need

    Cons

    • Windows only; no ARM processor support
    • Paid, with no free tier beyond the demo
    • Smaller user community than KiCad or Altium for PCB layout
    Visit Proteus Design Suite Details and reviews
    How this score is calculated
    Editorial fit ×0.369
    Reviews ×0.363
    Clicks (90 days) ×0.15100
    Freshness ×0.15100
    Votes ×0.150

    0 counted reviews, 0 up and 0 down votes. Full formula

    Is Proteus Design Suite a good Qucs-S alternative?

    Verified facts

    5 of 5 verified
    Licensing
    Perpetual licence
    Checked Nov 8, 2026labcenter.com(opens source in a new tab)
    Simulation
    Mixed-mode SPICE plus microcontroller simulation
    Checked Nov 8, 2026labcenter.com(opens source in a new tab)
    Supported MCUs
    Over 750 microprocessor variants
    Checked Nov 8, 2026labcenter.com(opens source in a new tab)
    Platforms
    Windows 10 or later (x64)
    Checked Nov 8, 2026labcenter.com(opens source in a new tab)
    Part library
    15 million+ parts via SamacSys and SnapEDA
    Checked Nov 8, 2026labcenter.com(opens source in a new tab)
  3. KiCad logo

    3. KiCad

    Best for: Hobbyists, startups and engineers who want a capable PCB tool with no licence cost

    Open sourceWindows, macOS, Linux

    68.8

    score / 100

    Why switch from Qucs-S

    Free and open source too, and adds PCB layout on top of Ngspice-based simulation in one suite.

    Pros

    • Completely free with no feature limits or seat caps
    • Runs on Windows, macOS and Linux
    • Large official libraries and an active community
    • Projects are local files you fully control

    Cons

    • Fewer advanced high-speed and team collaboration features than Altium
    • Managing custom libraries takes some learning
    • No built-in part sourcing like EasyEDA's LCSC link
    Visit KiCad Details and reviews
    How this score is calculated
    Editorial fit ×0.3100
    Reviews ×0.363
    Clicks (90 days) ×0.150
    Freshness ×0.15100
    Votes ×0.150

    0 counted reviews, 0 up and 0 down votes. Full formula

    Is KiCad a good Qucs-S alternative?

    Verified facts

    5 of 5 verified
    License
    GPL v3
    Checked Nov 8, 2026kicad.org(opens source in a new tab)
    Platforms
    Windows, Linux, macOS
    Checked Nov 8, 2026kicad.org(opens source in a new tab)
    Simulation
    Integrated SPICE
    Checked Nov 8, 2026kicad.org(opens source in a new tab)
    Manufacturing output
    Gerber and IPC-2581
    Checked Nov 8, 2026kicad.org(opens source in a new tab)
    First released
    1992
    Checked Nov 8, 2026kicad.org(opens source in a new tab)
  4. EasyEDA logo

    4. EasyEDA

    Best for: Hobbyists and small teams who design boards and order them from JLCPCB

    FreeWeb, Windows, macOS, Linux

    64.8

    score / 100

    Why switch from Qucs-S

    Runs in the browser with schematic, simulation and PCB tools, so nothing to install.

    Pros

    • Free, including the Pro edition
    • Runs in a browser with nothing to install
    • Shows LCSC part stock and sends boards straight to JLCPCB
    • Imports Altium, Eagle and KiCad designs

    Cons

    • Designs live on the vendor's cloud by default
    • Workflow steers you toward JLCPCB and LCSC
    • Less capable than Altium for complex high-speed boards
    Visit EasyEDA Details and reviews
    How this score is calculated
    Editorial fit ×0.387
    Reviews ×0.363
    Clicks (90 days) ×0.150
    Freshness ×0.15100
    Votes ×0.150

    0 counted reviews, 0 up and 0 down votes. Full formula

    Is EasyEDA a good Qucs-S alternative?

    Verified facts

    5 of 5 verified
    Price
    Free
    Checked Nov 8, 2026easyeda.com(opens source in a new tab)
    Web app
    Yes, no download needed
    Checked Nov 8, 2026easyeda.com(opens source in a new tab)
    Linux desktop client
    Yes
    Checked Nov 8, 2026easyeda.com(opens source in a new tab)
    Import
    Altium, Eagle, KiCad
    Checked Nov 8, 2026easyeda.com(opens source in a new tab)
    Team collaboration
    Yes
    Checked Nov 8, 2026easyeda.com(opens source in a new tab)

The best Qucs-S alternative for…

The highest-ranked app in this list for each need.

Altium Designer logo

Best Qucs-S alternative for most people

Altium Designer

Commercial suite with built-in mixed-signal simulation for teams doing professional board design.

KiCad logo

Best Qucs-S alternative for a free option

KiCad

Free and open source too, and adds PCB layout on top of Ngspice-based simulation in one suite.

KiCad logo

Best Qucs-S alternative for open source

KiCad

Free and open source too, and adds PCB layout on top of Ngspice-based simulation in one suite.

EasyEDA logo

Best Qucs-S alternative for Mac

EasyEDA

Runs in the browser with schematic, simulation and PCB tools, so nothing to install.

Proteus Design Suite logo

Best Qucs-S alternative for Windows

Proteus Design Suite

Commercial suite that simulates microcontroller firmware alongside the analog and digital circuit, then lays out the PCB.

KiCad logo

Best Qucs-S alternative for Linux

KiCad

Free and open source too, and adds PCB layout on top of Ngspice-based simulation in one suite.

EasyEDA logo

Best Qucs-S alternative for working in the browser

EasyEDA

Runs in the browser with schematic, simulation and PCB tools, so nothing to install.

Qucs-S alternatives: common questions

What is the best alternative to Qucs-S?

Altium Designer ranks first right now. Commercial suite with built-in mixed-signal simulation for teams doing professional board design. Proteus Design Suite and KiCad follow it in our ranking.

Qucs-S vs Altium Designer: what's the difference?

Qucs-S is free and open source; Altium Designer is a paid product. Qucs-S is open source and Altium Designer is not. Only Qucs-S runs on macOS and Linux.

Is Qucs-S free?

Qucs-S is free and open source.

Is there a free alternative to Qucs-S?

Yes. KiCad (open source) and EasyEDA (free) have a free option. Check each app's verified facts for current plan limits.

Is there an open-source alternative to Qucs-S?

Yes: KiCad.

Which Qucs-S alternatives work on Linux?

KiCad and EasyEDA run on Linux.

Why do people switch from Qucs-S?

The complaints we hear most: needs an external simulator backend to do anything; no PCB layout, so board design needs a separate tool; macOS install goes through a Homebrew tap rather than an app download.

How is this list ranked?

Every app is scored with the same published formula: how directly it replaces Qucs-S, reviews (weighted by verification), visits from AppBreakup, how recently its facts were checked against its own website, and reader votes.