Why C3
Spend an hour on any CAD forum and the same eight complaints come up, year after year, program after program. C3 was built by a working engineer who read them all — and answered each one by design.
The big vendors killed perpetual licenses. Stop paying the subscription — $2,000+ per year, forever — and you lose access to the software your livelihood runs on. Free tiers get revoked overnight. Users describe it, in their own words, as being held hostage.
$1,995, one time. No renewal, no expiration, no kill switch. The license is a signed file on your Mac — ten years from now it still works, whether or not you ever spend another dollar with us.
Thirty years of accumulated 3D machinery, cloud services, and vertical-market baggage — loaded whether you use it or not. Long launch times, sluggish pan and zoom on dense drawings, and 2D drafters paying the performance cost of features they never touch.
C3 is a native Apple Silicon application drawing through CoreGraphics — no emulation layers, no legacy engine. It launches in about a second and stays responsive on dense, multi-layer drawings, because 2D drafting is the whole job, not a legacy mode.
Mandatory accounts, license servers that fail on deadline day, telemetry, forced sign-ins, updates you can’t decline. Drafters working in secure facilities — or just on a job site with no signal — get locked out of their own drawings.
C3 runs entirely on your Mac. No sign-in, no license server, no telemetry, no cloud dependency of any kind. Your drawings are readable JSON files on your own disk — yours in every sense of the word.
Interface reshuffles every few releases invalidate decades of muscle memory — veterans still curse the ribbon migration fifteen years later. Updates silently break the scripts, macros, and custom setups that shops depend on.
C3’s keyboard commands and menu structure descend from a drafting system in continuous professional use since 1983. New capabilities are added alongside the existing workflow, never on top of it — when we added modern multi-snap, every classic snap key kept working exactly as before.
Annual release cycles ship half-tested features on a marketing schedule. Users have learned to fear updates — especially the plotting regressions that surface the day a deliverable is due.
Updates are never forced — your installed version keeps working untouched. Every build must pass an automated suite of hundreds of geometry and file-format tests before it can even be committed, and printing fidelity is treated as a core feature, not an afterthought.
Scale confusion, lineweight mapping files, mysterious margins, output that doesn’t match the screen. Every CAD forum has a permanent, busy section devoted to nothing but printing problems.
A WYSIWYG viewport mode prints exactly what’s on screen; exact-scale and fit modes handle formal output. PDF export is built in. No mapping files, no plot-style archaeology — what you drew is what prints.
For every AutoCAD alternative, the number-one fear is file fidelity: fonts substituted, blocks mangled, dimensions exploded on the way through. One bad round-trip with a client can end the relationship.
C3 imports and exports DXF, reads and writes DWG, and imports Eagle PCB files — with blocks, dimensions, colors, and text justification mapped carefully in both directions and validated against Autodesk’s own viewers. Gerber and SVG export cover fabrication and cutting workflows the big packages ignore.
Thousands of dollars a year buys forum-tier support, script responses, and “have you tried reinstalling?” Nobody who answers has ever seen the source code.
C3 is developed and supported by the engineer who built it — the same one who’s been refining this drafting system since 1983. Bug reports go straight to the source, and fixes ship in days, not release cycles.
Not marketing promises — architecture. Perpetual license, native speed, full offline operation, and an interface that will still fit your hands in twenty years.
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