Comparisons
SpeakCAD versus the alternatives
Where SpeakCAD wins, where the other tool wins, and when to use both.All the tools in one table
17 tools side by side, from AI CAD to mesh generators and classic CAD. Competitor features and prices were checked on each tool's own site on 4 October 2026; where a site does not say, the cell says “check their site”. Prices change, so follow the source links before you buy.| Tool | Kind | Exact mm | Edit by chat | Works on a phone | Outputs | Sliced G-code | Free tier | Price from | Best for |
|---|---|---|---|---|---|---|---|---|---|
| SpeakCAD | AI CAD (parametric OpenSCAD) | Yes | Yes; hand tools (hole, cut, add, extrude, text, rounded corners, filleted edges, shell, copies, measure) and typed numbers are free | Yes, full editor in the browser, laid out for a thumb | STL, 3MF, G-code | Yes, for 380+ printers, at the price of the STL | Hand tools and the files they make (free account); live demo (3 AI edits, no account); open and resize 650+ ready-made models; no free generation | Maker $7.99/mo (50 credits) | Functional parts with exact mm, from a phone |
| AdamCAD (CADAM) | AI CAD (parametric OpenSCAD), open source | Yes | Yes, plus parameter sliders | Opens in a phone browser (check their site) | STL, SCAD, DXF | No | Light daily quota; self-host with your own AI key | Pro $40/mo | Open source, self-hosting, BOSL2 |
| Zoo (Zookeeper) | AI CAD (B-rep, KCL code) | Yes | Yes (Zookeeper agent) | Desktop app and browser version (check their site) | STEP, STL, OBJ, glTF and more | No | 20 min of Zookeeper a month | Plus $20/mo | STEP for machining, engineering |
| STLsmith | AI CAD for simple functional parts | Yes | Yes | Check their site | STL | No | 3 parts without an account, 5 more with one | $9 once for 100 parts | Hooks, brackets, spacers |
| Backflip AI | AI reverse engineering: scan, photo or drawing to CAD | Yes, scaled from the scan or one known dimension | No: you edit the feature tree in CAD | Web app; editing on a phone: check their site | Feature tree (Fusion), STEP | No | 50 credits at sign-up | Builder $20/mo | Rebuilding a scanned part as CAD |
| ChatGPT + OpenSCAD | Chatbot writes OpenSCAD code, you compile it | Yes, when the code is right | Yes, but you paste the code back and forth | Chat yes; compiling needs OpenSCAD or a browser build of it | Code; STL or 3MF after you compile it | No | Yes: free ChatGPT tier, OpenSCAD is free | Free | People who can debug OpenSCAD |
| Meshy | AI mesh generator (text or image) | No: scaled afterwards | Re-prompt or regenerate; no dimension edits | Generates from a phone browser | STL, 3MF, OBJ, FBX, GLB, USDZ | No (plug-ins send to slicers) | 100 credits a month | Pro $20/mo | Figurines, props, game assets |
| Tripo AI | AI mesh generator (image or text) | No: scaled afterwards | Regenerate or edit parts of the mesh | Generates from a phone browser | STL, 3MF, OBJ, FBX, GLB, USDZ, PLY | No | 200 credits a month (about 13 models, non-commercial) | Pro $20/mo billed yearly | Sculpts and figurines from a photo |
| MakerWorld MakerLab | AI image-to-3D (Meshy, Tripo and others) plus template tools | No for AI models; templates have size fields | No | Some tools in the Bambu Handy app | 3MF and STL for Bambu Studio | No: slice in Bambu Studio | 2 free Image-to-3D tries; many free template tools | Credit packs from about $3 (varies by region) | Multicolour figurines and gifts on a Bambu Lab |
| Tinkercad | Block-based CAD (no AI) | Yes, typed into each shape, not linked | No | No: 864 px minimum viewport, phones unsupported | STL, OBJ, GLTF, SVG | No | Free | Free | Learning CAD, classrooms |
| Onshape | Professional parametric CAD in the browser (AI Advisor answers questions, no geometry) | Yes, sketch constraints | No: AI Advisor explains Onshape, agents announced | Apps; reviews call them very hard to use on a phone | STEP, STL, 3MF, Parasolid and more | No | Free plan: non-commercial, every document public | Standard $1,500 a year | Real CAD in a browser, for free, in public |
| FreeCAD | Open-source parametric CAD (no AI) | Yes, sketch constraints | No | No: Windows, macOS, Linux | STEP, IGES, STL, DXF, OBJ and more | CAM workbench for CNC, not FDM slicing | Entirely free | Free | Full CAD for free, with time to learn it |
| SketchUp Free | Surface modeller in the browser (no AI) | Typed lengths while drawing; weak afterwards | No | No: computer; a mobile viewer | STL on the free web version | No | Free for personal use | Go $10.75/mo billed annually | Buildings, rooms, furniture |
| OpenSCAD | Code CAD (no AI) | Yes | No: you write the code | No: desktop app | STL, 3MF, AMF, OFF and more | No | Free, open source | Free | Programmers, large parametric projects |
| Fusion 360 | Professional parametric CAD | Yes | Sketch and feature based (check their site for AI features) | No: the mobile app is a viewer | STEP, STL, 3MF, OBJ, F3D and more | Check their site | Personal-use licence with limits | Paid plans (check their site) | Product design, assemblies, CNC |
| Shapr3D | Direct-modelling CAD (no AI) | Yes | No | No: iPad, Mac, Windows | STEP, STL, 3MF and more | No | Basic: 2 projects, basic-resolution exports | Pro $299 a year | Designers who draw on an iPad |
| Thingiverse Customizer | Sliders on OpenSCAD models (no AI) | Yes, within the author's sliders | No | Works, but sliders are fiddly | STL | No | Free | Free | Models built for Customizer |
SpeakCADKind: AI CAD (parametric OpenSCAD)Exact mm: YesEdit by chat: Yes; hand tools (hole, cut, add, extrude, text, rounded corners, filleted edges, shell, copies, measure) and typed numbers are freeWorks on a phone: Yes, full editor in the browser, laid out for a thumbOutputs: STL, 3MF, G-codeSliced G-code: Yes, for 380+ printers, at the price of the STLFree tier: Hand tools and the files they make (free account); live demo (3 AI edits, no account); open and resize 650+ ready-made models; no free generationPrice from: Maker $7.99/mo (50 credits)Best for: Functional parts with exact mm, from a phone
AdamCAD (CADAM)Kind: AI CAD (parametric OpenSCAD), open sourceExact mm: YesEdit by chat: Yes, plus parameter slidersWorks on a phone: Opens in a phone browser (check their site)Outputs: STL, SCAD, DXFSliced G-code: NoFree tier: Light daily quota; self-host with your own AI keyPrice from: Pro $40/moBest for: Open source, self-hosting, BOSL2
Zoo (Zookeeper)Kind: AI CAD (B-rep, KCL code)Exact mm: YesEdit by chat: Yes (Zookeeper agent)Works on a phone: Desktop app and browser version (check their site)Outputs: STEP, STL, OBJ, glTF and moreSliced G-code: NoFree tier: 20 min of Zookeeper a monthPrice from: Plus $20/moBest for: STEP for machining, engineering
STLsmithKind: AI CAD for simple functional partsExact mm: YesEdit by chat: YesWorks on a phone: Check their siteOutputs: STLSliced G-code: NoFree tier: 3 parts without an account, 5 more with onePrice from: $9 once for 100 partsBest for: Hooks, brackets, spacers
Backflip AIKind: AI reverse engineering: scan, photo or drawing to CADExact mm: Yes, scaled from the scan or one known dimensionEdit by chat: No: you edit the feature tree in CADWorks on a phone: Web app; editing on a phone: check their siteOutputs: Feature tree (Fusion), STEPSliced G-code: NoFree tier: 50 credits at sign-upPrice from: Builder $20/moBest for: Rebuilding a scanned part as CAD
ChatGPT + OpenSCADKind: Chatbot writes OpenSCAD code, you compile itExact mm: Yes, when the code is rightEdit by chat: Yes, but you paste the code back and forthWorks on a phone: Chat yes; compiling needs OpenSCAD or a browser build of itOutputs: Code; STL or 3MF after you compile itSliced G-code: NoFree tier: Yes: free ChatGPT tier, OpenSCAD is freePrice from: FreeBest for: People who can debug OpenSCAD
MeshyKind: AI mesh generator (text or image)Exact mm: No: scaled afterwardsEdit by chat: Re-prompt or regenerate; no dimension editsWorks on a phone: Generates from a phone browserOutputs: STL, 3MF, OBJ, FBX, GLB, USDZSliced G-code: No (plug-ins send to slicers)Free tier: 100 credits a monthPrice from: Pro $20/moBest for: Figurines, props, game assets
Tripo AIKind: AI mesh generator (image or text)Exact mm: No: scaled afterwardsEdit by chat: Regenerate or edit parts of the meshWorks on a phone: Generates from a phone browserOutputs: STL, 3MF, OBJ, FBX, GLB, USDZ, PLYSliced G-code: NoFree tier: 200 credits a month (about 13 models, non-commercial)Price from: Pro $20/mo billed yearlyBest for: Sculpts and figurines from a photo
MakerWorld MakerLabKind: AI image-to-3D (Meshy, Tripo and others) plus template toolsExact mm: No for AI models; templates have size fieldsEdit by chat: NoWorks on a phone: Some tools in the Bambu Handy appOutputs: 3MF and STL for Bambu StudioSliced G-code: No: slice in Bambu StudioFree tier: 2 free Image-to-3D tries; many free template toolsPrice from: Credit packs from about $3 (varies by region)Best for: Multicolour figurines and gifts on a Bambu Lab
TinkercadKind: Block-based CAD (no AI)Exact mm: Yes, typed into each shape, not linkedEdit by chat: NoWorks on a phone: No: 864 px minimum viewport, phones unsupportedOutputs: STL, OBJ, GLTF, SVGSliced G-code: NoFree tier: FreePrice from: FreeBest for: Learning CAD, classrooms
OnshapeKind: Professional parametric CAD in the browser (AI Advisor answers questions, no geometry)Exact mm: Yes, sketch constraintsEdit by chat: No: AI Advisor explains Onshape, agents announcedWorks on a phone: Apps; reviews call them very hard to use on a phoneOutputs: STEP, STL, 3MF, Parasolid and moreSliced G-code: NoFree tier: Free plan: non-commercial, every document publicPrice from: Standard $1,500 a yearBest for: Real CAD in a browser, for free, in public
FreeCADKind: Open-source parametric CAD (no AI)Exact mm: Yes, sketch constraintsEdit by chat: NoWorks on a phone: No: Windows, macOS, LinuxOutputs: STEP, IGES, STL, DXF, OBJ and moreSliced G-code: CAM workbench for CNC, not FDM slicingFree tier: Entirely freePrice from: FreeBest for: Full CAD for free, with time to learn it
SketchUp FreeKind: Surface modeller in the browser (no AI)Exact mm: Typed lengths while drawing; weak afterwardsEdit by chat: NoWorks on a phone: No: computer; a mobile viewerOutputs: STL on the free web versionSliced G-code: NoFree tier: Free for personal usePrice from: Go $10.75/mo billed annuallyBest for: Buildings, rooms, furniture
OpenSCADKind: Code CAD (no AI)Exact mm: YesEdit by chat: No: you write the codeWorks on a phone: No: desktop appOutputs: STL, 3MF, AMF, OFF and moreSliced G-code: NoFree tier: Free, open sourcePrice from: FreeBest for: Programmers, large parametric projects
Fusion 360Kind: Professional parametric CADExact mm: YesEdit by chat: Sketch and feature based (check their site for AI features)Works on a phone: No: the mobile app is a viewerOutputs: STEP, STL, 3MF, OBJ, F3D and moreSliced G-code: Check their siteFree tier: Personal-use licence with limitsPrice from: Paid plans (check their site)Best for: Product design, assemblies, CNC
Shapr3DKind: Direct-modelling CAD (no AI)Exact mm: YesEdit by chat: NoWorks on a phone: No: iPad, Mac, WindowsOutputs: STEP, STL, 3MF and moreSliced G-code: NoFree tier: Basic: 2 projects, basic-resolution exportsPrice from: Pro $299 a yearBest for: Designers who draw on an iPad
Thingiverse CustomizerKind: Sliders on OpenSCAD models (no AI)Exact mm: Yes, within the author's slidersEdit by chat: NoWorks on a phone: Works, but sliders are fiddlyOutputs: STLSliced G-code: NoFree tier: FreePrice from: FreeBest for: Models built for Customizer
One page per tool
SpeakCAD vs OpenSCAD
OpenSCAD is powerful but you write every line. SpeakCAD generates the OpenSCAD program from a plain-English description and renders it in the browser. Compare features, learning curve and output.SpeakCAD vs Tinkercad
Tinkercad is the free block-building CAD. SpeakCAD keeps the tapping and adds what Tinkercad lacks: linked millimetres, rounded corners, a phone editor, an AI for the rest, and files sliced for your printer. Compare precision, phones and exports.SpeakCAD vs Fusion 360
Fusion 360 is professional parametric CAD with a steep learning curve. SpeakCAD gets makers from idea to STL in minutes with plain English. Compare capability, speed and cost.SpeakCAD vs Meshy
Meshy generates textured organic meshes for games and art. SpeakCAD generates precise, parametric, watertight CAD parts for 3D printing. Compare outputs, precision and workflow.SpeakCAD vs Tripo AI
Tripo AI creates organic 3D models from text and images for creative work. SpeakCAD creates dimension-accurate, watertight CAD parts for 3D printing. Compare precision, editing and output formats.SpeakCAD vs Shapr3D
Shapr3D is the best-known CAD for iPad, built around the Apple Pencil. SpeakCAD runs in any phone browser and replaces drawing with describing. Compare devices, learning curve, output and price.SpeakCAD vs Thingiverse Customizer
Customizer changes the parameters an author exposed, on the models that support it. SpeakCAD rebuilds any STL as a parametric model and changes anything by chat. Compare scope, reliability and cost.SpeakCAD vs Zoo Text-to-CAD
Zoo generates B-rep CAD from text for engineers and developers, with STEP and an API. SpeakCAD is built for people with a 3D printer: phone browser, chat editing, print rules applied, STL and 3MF out.SpeakCAD vs AdamCAD (CADAM)
CADAM, Adam's open-source text-to-CAD app, writes OpenSCAD with sliders. SpeakCAD does it for 3D printing: phone editor, print rules, sliced G-code.SpeakCAD vs MakerWorld MakerLab
MakerLab, in Bambu Lab's MakerWorld, turns photos into multicolour figurines with Meshy, Tripo and more. SpeakCAD makes functional parts with exact millimetres.SpeakCAD vs Backflip AI
Backflip turns 3D scans, photos and drawings into parametric CAD or STEP for engineers. SpeakCAD designs printable parts from a description, on a phone.SpeakCAD vs STLsmith
STLsmith turns a description into an STL for hooks, brackets and spacers, with free tries. SpeakCAD adds a phone editor, 3MF, sliced G-code and STL editing.SpeakCAD vs Onshape
Onshape is full parametric CAD in the browser with a free plan. SpeakCAD is nine hand tools and an AI for 3D-printed parts, on a phone, with G-code at the end. Compare scope, phones, free tiers and AI.SpeakCAD vs FreeCAD
FreeCAD is free, open-source parametric CAD for the desktop. SpeakCAD runs in a phone browser with nine hand tools and an AI. Compare install, learning curve, fillets, phones and output.SpeakCAD vs SketchUp Free
SketchUp Free is a browser modeller built for architecture; its exports are surfaces, not always solids. SpeakCAD makes watertight parts in millimetres on a phone. Compare printability, dimensions and phones.Questions
For a part that has to fit, choose an AI CAD tool that computes the geometry from your numbers, not a mesh generator: SpeakCAD to work from a phone and get G-code sliced for your printer, AdamCAD's open-source CADAM to self-host on a computer, Zoo for STEP files, STLsmith for simple hooks and brackets. Meshy, Tripo and MakerLab are better for figurines.
Yes for the hand tools and the files they make. AI requests use credits, and so do downloads of AI work without a plan. Free, no card: the hand tools (hole with a screw head, cut, add, extrude, text, rounded corners and edges, shell, measure, copies in a row, a grid or a circle, every size and position typed in millimetres) on the live demo without an account and in a free account, where a part you shaped by hand downloads free as STL or 3MF; the live demo's 3 AI edits of a real part; opening one of the 650+ ready-made library models in a free account, resizing it in the viewer and downloading it as STL or 3MF; and the Fit Check coupon as STL or 3MF. A new free account also gets its first AI part free (not offered in every country): some accounts get the credits right away, others confirm with a card first (a free trial, nothing charged that day); downloading the part spends 4 credits without a plan, like any AI work (every plan includes downloads). Shaping a part by hand (a hole and its screw head, a cut, an added tab, raised or engraved text, an extruded face, rounded corners, and copies in a row, a grid or a circle) and downloading what you shaped are free. A new part or a design change by the AI spends 3 credits, a small change 2, a quick edit 1; downloads are included in every plan (4 credits without one), and G-code sliced for your printer costs the same as the STL. G-code sliced for your printer costs the same as the STL: included in every plan, free for a part you shaped by hand, 4 credits without a plan for a part with AI work in it. Credits come with a plan, or once as a top-up. A typical AI part (the part, a small change and a few quick edits, the download included) spends about 8 credits, so Maker's 50 credits a month cover about six AI parts. Maker $7.99/mo (50 credits a month, downloads included, sliced G-code too); Pro $14.99/mo (200 credits a month); Unlimited $79.99/mo (300 AI requests a month included, downloads unlimited). Credits can also be bought once, without a plan: 20 for $4.99, 50 for $9.99, 100 for $17.99 or 200 for $34.99. They never expire and add to a plan's credits; a credit costs less the bigger the top-up, and more than on any plan.
Not by itself: ChatGPT can describe a part or write OpenSCAD code, but it does not produce a printable file. Paste its description or code into SpeakCAD (see the ChatGPT to STL page) to get an STL, a 3MF or G-code sliced for your printer.
For figurines and organic sculpts: Meshy, Tripo or MakerLab. For STEP files for a machinist: Zoo, Backflip or Fusion 360. To learn CAD for free: Tinkercad. For open source and self-hosting: CADAM or OpenSCAD.