Coi
Shares rank 71 of 163 programming languages by recommenders
Coi is a high-level language that compiles to WASM, praised for simpler UI code and efficient compute. Critics find its syntax unusual and question some claims.
Coi is a high-level language that compiles to WASM, praised for simpler UI code and efficient compute. Critics find its syntax unusual and question some claims.
18 people gave an opinion
- recommend it
- 17
- criticize it
- 1
- approval share
- 94%
Recommended in 2 of 13 months
- November 2025: not recommended
- December 2025: not recommended
- January 2026: recommended
- February 2026: not recommended
- March 2026: recommended
- April 2026: not recommended
- May 2026: not recommended
- June 2026: not recommended
- July 2026: not recommended
- August 2026: not recommended
- September 2026: not recommended
- October 2026: not recommended
- November 2026: not recommended (month in progress)
Why it doesn’t carry the badge
- 17 people recommend itNeeds 10 or more, met.
- 17 recommenders for every criticNeeds 2 to 1 or better, met.
- Recommended in 2 of 13 monthsNeeds 4 or more, not met.
The same three rules apply to every product, and the badge can’t be bought. How the badge works
What people say about it
The reasons people give, with the number of comments that give each one. Open a reason to read what they said.
Why people recommend it
Each mark is one comment
Enthusiastic praise for the project
“Nice work ! Thanks for shating”
Comment from 24 Jan 2026 in “Show HN: Coi – A language that compiles to WASM, beats React/Vue” “I love the idea and execution”
Comment from 24 Jan 2026 in “Show HN: Coi – A language that compiles to WASM, beats React/Vue” “This looks quite promising.”
Comment from 24 Jan 2026 in “Show HN: Coi – A language that compiles to WASM, beats React/Vue” - Comment from 24 Jan 2026 in “Show HN: Coi – A language that compiles to WASM, beats React/Vue”
- Comment from 24 Jan 2026 in “Show HN: Coi – A language that compiles to WASM, beats React/Vue”
Better developer experience and simpler code
“I built Coi to make the development process more enjoyable (better DX) while keeping the efficiency”
Comment from 24 Jan 2026 in “Show HN: Coi – A language that compiles to WASM, beats React/Vue” “For new code, writing Coi directly is simpler”
Comment from 24 Jan 2026 in “Show HN: Coi – A language that compiles to WASM, beats React/Vue” Efficient compute and data processing
“The real advantage comes when you have compute-intensive operations, data processing, image manipulation, numerical algorithms, etc.”
Comment from 24 Jan 2026 in “Show HN: Coi – A language that compiles to WASM, beats React/Vue” “I built Coi to make the development process more enjoyable (better DX) while keeping the efficiency”
Comment from 24 Jan 2026 in “Show HN: Coi – A language that compiles to WASM, beats React/Vue” Clean high-level UI language
“a language rework for UI's that actually makes sense and incorporates all that we've learned in the modern age about UI code”
Comment from 24 Jan 2026 in “Show HN: Coi – A language that compiles to WASM, beats React/Vue” “WebCC is a low-level toolkit – Coi is a high-level language that compiles to it”
Comment from 24 Jan 2026 in “Show HN: Coi – A language that compiles to WASM, beats React/Vue”
What people warn about
Each mark is one comment
Unusual HTML-like syntax hard to parse
“I don't like this html-syntax, cause you use a separate syntax-methods for existing js-functions wrapped as html-tags”
Comment from 24 Jan 2026 in “Show HN: Coi – A language that compiles to WASM, beats React/Vue” “this looks kinda cursed, makes me wonder how it's even parsed”
Comment from 25 Jan 2026 in “Show HN: Coi – A language that compiles to WASM, beats React/Vue”
Other programming languages people recommend
The four most recommended other programming languages, with the same counts for each, so you can compare like for like. The tick on each bar marks the 2 to 1 line the badge needs.
See all 163 programming languages, rankedWhat people said
19 of the 24 comments that mention it, newest first. Each links to the original comment.
“Coi is designed to use the browser's native HTML and CSS.”
“this looks kinda cursed, makes me wonder how it's even parsed”
“I really, really like this.”
“very nice project, kudos! ... This sounds a bit suspicious tbh.”
“Coi avoids this ambiguity because the compiler can definitively trace usage patterns”
“For new code, writing Coi directly is simpler”
“WebCC is a low-level toolkit – Coi is a high-level language that compiles to it”
“COI compiles on FreeBSD but the example app didn't.”
“I love the idea and execution”
“I built Coi to make the development process more enjoyable (better DX) while keeping the efficiency”
“It doesn't drag in the C++ standard library, so builds stay lean.”
“The real advantage comes when you have compute-intensive operations, data processing, image manipulation, numerical algorithms, etc.”
“I don't like this html-syntax, cause you use a separate syntax-methods for existing js-functions wrapped as html-tags”
“This looks quite promising.”
“This itself is quite cool.”
“a language rework for UI's that actually makes sense and incorporates all that we've learned in the modern age about UI code”
“It looks like Coi has potential to be used for web, server and cross-platform desktop.”
“the Shared Memory approach is genius”
“Nice work ! Thanks for shating”
Counts come from 1,795,640 Hacker News comments, November 2025 to November 2026. How we count. Report a mistake.