# CorridorKey 2.0

17 Hacker News commenters recommended CorridorKey 2.0 and 5 criticized it, November 2025 to November 2026. It was recommended in 2 of 13 months.

**Verdict:** Free tool that gets green screen keys to usable quality in seconds, cutting hours of manual masking. Main caveat: a non-commercial license that critics say is not truly open source.

## Why people recommend it

- Produces high-quality keys quickly (4 comments): "CorridorKey can automatically create world-class chroma keys even for some of the most traditionally-challenging scenarios." ([source](https://news.ycombinator.com/item?id=47419008)) "This tool ac get you from zero to 80%-90% for most shots in a handful of seconds." ([source](https://news.ycombinator.com/item?id=50252678)) "Very great results as well for something free." ([source](https://news.ycombinator.com/item?id=50251849))
- Removes tedious keying work (3 comments): "This tool ac get you from zero to 80%-90% for most shots in a handful of seconds." ([source](https://news.ycombinator.com/item?id=50252678)) "really removing all the annoying part of chromakeys" ([source](https://news.ycombinator.com/item?id=47305096)) "you’re absolutely still saving hours" ([source](https://news.ycombinator.com/item?id=50252327))
- Empowers artists without heavy restrictions (3 comments): "I think it is an amazing example of how labs should take all of their fundamental research and turn into products entirely designed, limited and scoped only to empower artists" ([source](https://news.ycombinator.com/item?id=50251988)) "It's a lot better than just "source available". You can do most things as if it was open source." ([source](https://news.ycombinator.com/item?id=50253196)) "Yet they're not being overbearing or stifling the community." ([source](https://news.ycombinator.com/item?id=50260863))
- Professional-level results at no cost (2 comments): "it does seem to be well into the professional level of tools" ([source](https://news.ycombinator.com/item?id=50252467)) "Very great results as well for something free." ([source](https://news.ycombinator.com/item?id=50251849))

## What people warn about

- Non-commercial license, not open source (5 comments): "modifying a CC-NC license and then calling this "open source" is not it." ([source](https://news.ycombinator.com/item?id=50253131)) "it is merely source-available. This has been repeatedly brought up along with other very questionable license decisions" ([source](https://news.ycombinator.com/item?id=50252645)) "this still is a bad license, as CC-by-nc-sa with redundant and contradictory terms isn't particularly clear" ([source](https://news.ycombinator.com/item?id=50256567))

## Alternatives hackers recommend

- [Apple Motion](https://hackerapproved.com/p/motion.md): 17 recommend
- [Adobe After Effects](https://hackerapproved.com/p/adobe-after-effects.md): 14 recommend
- [ntsc-rs](https://hackerapproved.com/p/ntsc-rs.md): 14 recommend
- [Nuke](https://hackerapproved.com/p/nuke.md): 6 recommend

## Cite as

Hacker Approved, "CorridorKey 2.0", https://hackerapproved.com/p/corridorkey-2-0/ (counts from 1,795,640 Hacker News comments, November 2025 to November 2026).