LightCraft, the Free Lightroom Alternative: RAW Support Gaps

A free Lightroom alternative is not new: darktable and RawTherapee are open source, mature and capable, and they still have not dented Adobe's subscription numbers. The reason is colour. Lightroom ships calibrated profiles for almost every camera, so a RAW file looks right before you touch a slider. LightCraft copies Lightroom's panels faithfully and, by its own account, has not yet solved that problem. It is the most important fact in this guide.

The sources are LightCraft's README and parity figures, Creative Bloq's hands-on test published on 13 October 2026, PetaPixel's report of 7 October, the ArtCraft site and the GitHub release record. We have not processed our own RAW files in it.

What LightCraft is

LightCraft is the free Lightroom alternative among ArtCraft's seven Craft apps, written in Rust and, by developer Brandon Thomas's account, with Anthropic's Claude Opus 5.5. The README calls it a non-destructive photo editor and "a clean-room reimplementation of Adobe Lightroom", built from public specifications and black-box observation without reading Adobe binaries or GPL raw-processing code. PetaPixel notes it models Lightroom CC rather than Lightroom Classic, and that Thomas has had requests for a Classic equivalent. The repository dates from 30 September 2026, reached version 0.7.1 on 12 October and had 12,275 stars on 14 October. The ArtCraft apps page labels it "In development"; the README says alpha.

The parity figures

The project's self-assessment is more candid than most marketing. By feature count it puts itself at about 81% of Lightroom, with core features at 98%. As a day-to-day replacement it rates the whole product nearer 61%, casual use at about 64%, and "typical working photographers" at about 49%. These are the developer's numbers measured against Adobe's documentation; nobody outside has verified them, but they are the right shape, and the next two sections explain the gap.

RAW support, camera by camera

LightCraft decodes RAW files with its own code rather than a shared library. The README lists DNG, Canon CR2 and CR3, Sony ARW, Nikon NEF, Fujifilm RAF including X-Trans, Panasonic RW2 and Leica RWL, Pentax PEF, Olympus ORF and uncompressed Samsung SRW. Partial or missing: some CR3 variants, compressed ORF and SRW, and Nikon's HE NEF compression. JPEG, PNG, TIFF, WebP, PSD composites and JPEG XL open; HEIC needs a build flag. Export covers JPEG, PNG, TIFF, WebP, AVIF, DNG and originals.

Decoding is not the same as colour. The README says camera colour is estimated for some Sony, Nikon, Panasonic, Fujifilm and Canon CR3 models, that "measured calibration is missing", and that other cameras get a neutral matrix. Lens profiles for distortion, vignetting and chromatic aberration exist as generic corrections; the project's own per-lens profiles are "not started". For a photographer, that means the starting point of every file is different from Lightroom's, and the fix is manual.

What the hands-on test found

Creative Bloq's Joe Foley shot with a Canon EOS R5 and ran LightCraft on Windows. It would not import CR3 files straight from the camera, so he copied them to disk first. With no camera-matched profiles, vignette and chromatic aberration had to be corrected by hand. The develop panels were where Lightroom's are, and Light, Tone Curve, HSL and Color behaved as expected; Clarity, Texture and Dehaze live under Effects. Sharpening was harsh even at the default amount and added fuzzy artefacts, with no masking overlay to control it. Subject selection produced a radial mask instead of selecting his cat. Object selection and AI denoising required manually installing a separate model.

Masks, AI and the catalogue

The README confirms the mask situation: brush, linear and radial gradients, luminance and colour range, and Sky, Subject and Background selection that it describes as "classical heuristics" rather than machine learning. AI Denoise is in progress and depends on user-installed weights; Super Resolution is not started. The library side is further along: albums, folders, smart albums, stacks and virtual copies, 18 presets with an amount slider, and a non-destructive edit history. Missing, by the README's list: on-screen HDR, video, and Lightroom Classic's Print, Book and Map modules.

For the AI jobs LightCraft cannot do yet, dedicated tools exist. Topaz Labs handles denoising and upscaling, Cleanup.pictures removes objects, and our AI photo editing guide sorts the free from the paid.

Price, platforms and downloads

Free, dual-licensed under MIT or Apache-2.0. Builds exist for Windows on x64, ARM64 and x86, macOS universal, Linux on x86_64 and aarch64 plus a RISC-V tarball, FreeBSD, and a static web build. ArtCraft's subscription plans, from $8 a month billed yearly, buy generative credits for a separate AI studio and have nothing to do with running LightCraft. Download from github.com/storytold or getartcraft.com only; copycat sites exist.

This free Lightroom alternative against darktable and RawTherapee

Both are free, open source, mature and support far more cameras with proper colour matrices, and both have interfaces that are nothing like Lightroom's. LightCraft is Lightroom's interface with a two-week-old RAW pipeline. For a hobbyist who shoots JPEG or DNG and wants familiar panels, it already works. For anyone whose income depends on colour-accurate RAW processing, darktable, Capture One or Lightroom itself remain the choices, and the project's own 49% figure for working photographers says the same.

Who should try it

Lightroom CC users on Linux, where Adobe does not ship and a free Lightroom alternative is the only kind. Photographers shooting one of the fully supported cameras who want to test the panels against files they know. Developers, because the app can be driven by an agent over MCP. Not yet: wedding or commercial photographers, anyone on an unsupported CR3 or compressed Olympus variant, and anyone who needs Lightroom Classic's modules.

The rest of the suite

The companion apps are PhotoCraft for Photoshop, VectorCraft for Illustrator, FilmCraft for Premiere Pro, EffectCraft for After Effects, DesignCraft for InDesign and PdfCraft for Acrobat Pro. The model that wrote them is reviewed at Claude.

FAQ

Is LightCraft free?

Yes. It is open source under MIT or Apache-2.0 with builds for Windows, macOS, Linux, FreeBSD and the browser. ArtCraft's paid plans buy generative credits for a separate AI studio, not access to LightCraft.

Which RAW formats does LightCraft support?

Per its README: DNG, Canon CR2 and CR3, Sony ARW, Nikon NEF, Fujifilm RAF, Panasonic RW2, Leica RWL, Pentax PEF, Olympus ORF and uncompressed Samsung SRW, with some CR3 variants, compressed ORF and SRW, and Nikon HE NEF missing or partial.

Does LightCraft have camera colour profiles?

Not measured ones. The README says camera colour is estimated for some models and that measured calibration is missing, with a neutral matrix for the rest. Creative Bloq had to correct vignetting and chromatic aberration manually for that reason.

Is LightCraft a Lightroom Classic replacement?

No. It models Lightroom CC, and the README lists the Classic Print, Book and Map modules as missing. The developer has said people have asked for a Classic equivalent.

Is LightCraft better than darktable?

Not for RAW processing; as a free Lightroom alternative, darktable is mature and supports far more cameras with proper colour. LightCraft's advantage is Lightroom's own panel layout, which matters to people retrained by years of it, and native Linux support alongside Windows and macOS.