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PreForm alternatives: 4 apps ranked by verified data

Facts checked Nov 8, 2026AppBreakup editorialHow we rankAll 3D printing slicers

Top picks

Common reasons people leave PreForm: only works with Formlabs printers, and no Linux version. We ranked 4 alternatives by how directly each one replaces PreForm, then by reviews, real visits and how recently each app's facts were checked against its own website. PrusaSlicer currently ranks first.

Quick comparison

#AppPricingVerified priceOpen sourcePlatformsVerified factsScore
1PrusaSlicer logoPrusaSlicerOpen source—YesWindows, macOS, Linux5 of 576.8
2Lychee Slicer logoLychee SlicerFree plan + paid€9.99 a month for Plus; €8.33/month billed yearly (€99.90)NoWindows, macOS, Linux7 of 768.8
3CHITUBOX logoCHITUBOXFree plan + paid—NoWindows, macOS, Linux5 of 564.8
4UltiMaker Cura logoUltiMaker CuraOpen source—YesWindows, macOS, Linux4 of 459.4
  1. PrusaSlicer logo

    1. PrusaSlicerTop pick

    Best for: Prusa owners and anyone who wants a mature, free slicer that works fully offline

    Open sourceWindows, macOS, Linux

    76.8

    score / 100

    Why switch from PreForm

    Free, open-source slicer that also handles Prusa's SL1 resin printers as well as FDM machines.

    Pros

    • Simple, Advanced and Expert modes in one app
    • Fully local slicing with no account
    • Strong organic supports and multi-material tools
    • Free and open source

    Cons

    • Interface is plainer than newer slicers
    • Fewer built-in calibration tests than OrcaSlicer
    • Remote printing features favour Prusa printers
    Visit PrusaSlicer 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 PrusaSlicer a good PreForm alternative?

    Verified facts

    5 of 5 verified
    License
    AGPL-3.0
    Checked Nov 8, 2026github.com(opens source in a new tab)
    Price
    Free, no account
    Checked Nov 8, 2026prusa3d.com(opens source in a new tab)
    Platforms
    Windows, Mac, Linux
    Checked Nov 8, 2026prusa3d.com(opens source in a new tab)
    Local slicing
    Yes
    Checked Nov 8, 2026prusa3d.com(opens source in a new tab)
    Based on
    Slic3r
    Checked Nov 8, 2026prusa3d.com(opens source in a new tab)
  2. Lychee Slicer logo

    2. Lychee Slicer

    Best for: Resin printing hobbyists, especially miniature makers, who want strong automatic supports

    Free plan + paidWindows, macOS, Linux

    68.8

    score / 100

    Why switch from PreForm

    Resin slicer with strong support editing that works across many brands of SLA and MSLA printers.

    Pros

    • Handles both resin and filament printers in one app
    • Automatic orientation and support generation for resin prints
    • Compatible with 750+ printers
    • Free Lite edition for getting started

    Cons

    • Many advanced resin tools are locked behind the Plus subscription
    • Closed source and requires an account to use
    • Filament support is newer and less mature than dedicated FDM slicers
    Visit Lychee Slicer 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 Lychee Slicer a good PreForm alternative?

    Verified facts

    7 of 7 verified
    Free plan
    Yes, Lychee Slicer Lite (ads on export)
    Checked Nov 8, 2026mango3d.io(opens source in a new tab)
    Compatible printers
    750+
    Checked Nov 8, 2026mango3d.io(opens source in a new tab)
    Printing types
    Resin and FDM
    Checked Nov 8, 2026mango3d.io(opens source in a new tab)
    Editions
    Lite, Plus, Library
    Checked Nov 8, 2026mango3d.io(opens source in a new tab)
    Starting price
    €9.99 a month for Plus; €8.33/month billed yearly (€99.90)
    Checked Nov 8, 2026mango3d.io(opens source in a new tab)
    Plus & Library plan
    €19.99 a month; €16.66/month billed yearly (€199.90)
    Checked Nov 8, 2026mango3d.io(opens source in a new tab)
    Free trial
    30 days of Lychee Plus
    Checked Nov 8, 2026mango3d.io(opens source in a new tab)
  3. CHITUBOX logo

    3. CHITUBOX

    Best for: Resin printer owners, especially Elegoo or Phrozen users, who want a free slicer with wide printer support

    Free plan + paidWindows, macOS, Linux

    64.8

    score / 100

    Why switch from PreForm

    Widely used free resin slicer for MSLA printers from many manufacturers.

    Pros

    • Free version covers slicing and supports
    • Profiles for a long list of resin printers
    • Exports many printer-specific file formats
    • Runs on Windows, macOS and Linux

    Cons

    • Resin printers only; no FDM support
    • Advanced tools need a paid subscription
    • Paid licences are tied to a limited number of computers
    • Fairly heavy system requirements for large models
    Visit CHITUBOX 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 CHITUBOX a good PreForm alternative?

    Verified facts

    5 of 5 verified
    Free version
    Yes
    Checked Nov 8, 2026docs.chitubox.com(opens source in a new tab)
    Platforms
    Windows, macOS, Ubuntu
    Checked Nov 8, 2026docs.chitubox.com(opens source in a new tab)
    Model formats
    STL, OBJ, 3MF
    Checked Nov 8, 2026docs.chitubox.com(opens source in a new tab)
    Paid plans
    Advanced and Pro subscriptions
    Checked Nov 8, 2026docs.chitubox.com(opens source in a new tab)
    Devices per licence
    2 (personal), 5 (team)
    Checked Nov 8, 2026docs.chitubox.com(opens source in a new tab)
  4. UltiMaker Cura logo

    4. UltiMaker Cura

    Best for: Beginners and UltiMaker users who want a well-known slicer with plugins and material profiles

    Open sourceWindows, macOS, Linux

    59.4

    score / 100

    Why switch from PreForm

    Free, open-source FDM slicer with profiles for hundreds of printers if you move to filament.

    Pros

    • Recommended mode gets beginners printing quickly
    • 400+ settings for fine-tuning
    • Marketplace for plugins and material profiles
    • Free and open source

    Cons

    • Profiles for fast modern printers lag behind OrcaSlicer
    • Can feel slow with large or complex models
    • Fewer built-in calibration tools than competitors
    Visit UltiMaker Cura Details and reviews
    How this score is calculated
    Editorial fit ×0.369
    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 UltiMaker Cura a good PreForm alternative?

    Verified facts

    4 of 4 verified
    License
    LGPL-3.0
    Checked Nov 8, 2026github.com(opens source in a new tab)
    Open source
    Yes, free
    Checked Nov 8, 2026ultimaker.com(opens source in a new tab)
    Settings
    400+
    Checked Nov 8, 2026ultimaker.com(opens source in a new tab)
    Platforms
    Windows, macOS, Linux
    Checked Oct 29, 2026ultimaker.com(opens source in a new tab)

The best PreForm alternative for…

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

PrusaSlicer logo

Best PreForm alternative for most people

PrusaSlicer

Free, open-source slicer that also handles Prusa's SL1 resin printers as well as FDM machines.

UltiMaker Cura logo

Best PreForm alternative for a free option

UltiMaker Cura

Free, open-source FDM slicer with profiles for hundreds of printers if you move to filament.

Lychee Slicer logo

Best PreForm alternative for a free plan you can upgrade

Lychee Slicer

Resin slicer with strong support editing that works across many brands of SLA and MSLA printers.

PrusaSlicer logo

Best PreForm alternative for open source

PrusaSlicer

Free, open-source slicer that also handles Prusa's SL1 resin printers as well as FDM machines.

CHITUBOX logo

Best PreForm alternative for Mac

CHITUBOX

Widely used free resin slicer for MSLA printers from many manufacturers.

PrusaSlicer logo

Best PreForm alternative for Windows

PrusaSlicer

Free, open-source slicer that also handles Prusa's SL1 resin printers as well as FDM machines.

PrusaSlicer logo

Best PreForm alternative for Linux

PrusaSlicer

Free, open-source slicer that also handles Prusa's SL1 resin printers as well as FDM machines.

PreForm alternatives: common questions

What is the best alternative to PreForm?

PrusaSlicer ranks first right now. Free, open-source slicer that also handles Prusa's SL1 resin printers as well as FDM machines. Lychee Slicer and CHITUBOX follow it in our ranking.

PreForm vs PrusaSlicer: what's the difference?

PreForm is free to use; PrusaSlicer is free and open source. PrusaSlicer is open source and PreForm is not. Only PrusaSlicer runs on Linux.

Is PreForm free?

PreForm is free to use. Price: Free. Checked on PreForm's own site, November 2026.

Is there a free alternative to PreForm?

Yes. PrusaSlicer (open source), Lychee Slicer (free plan + paid), CHITUBOX (free plan + paid) and UltiMaker Cura (open source) have a free option. Check each app's verified facts for current plan limits.

Is there an open-source alternative to PreForm?

Yes: PrusaSlicer and UltiMaker Cura.

Which PreForm alternatives work on Linux?

PrusaSlicer, Lychee Slicer, CHITUBOX and UltiMaker Cura run on Linux.

Why do people switch from PreForm?

The complaints we hear most: only works with Formlabs printers; no Linux version; closed source.

How is this list ranked?

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