# Mono runtime

Hacker Approved page: https://hackerapproved.com/p/mono/

5 people recommended Mono runtime in Hacker News comments, 5 had mixed feelings and 14 criticized it, November 2025 to October 2026. It was recommended in 4 of 12 months, in 7 threads. It does not meet the Hacker Approved badge rule.

**Verdict:** Criticized more than recommended: critics say it is slower and less reliable than Microsoft's .NET runtime; those who recommend it cite running existing .NET and C# code, including .NET Framework 4.8 apps.

Summary written by Claude from the comments below.

## What people warn about

- Heavy dependency, awkward to migrate (4 comments in the sample): "The scripting ending designed around mono doesn’t translate as well to CoreCLR" ([source](https://news.ycombinator.com/item?id=46416095)) "it's Mono and a decade or more of the most exciting layer violating crimes you can imagine" ([source](https://news.ycombinator.com/item?id=46419900)) "Mono is a huge dependency which doesn't vibe with the rest of the environment" ([source](https://news.ycombinator.com/item?id=49595530))
- Outdated, hacky and incompatible (3 comments in the sample): "A Jurassic GC introduced in Mono, that due to Unity not wanting to pay Xamarin for updates, meant it was mostly frozen" ([source](https://news.ycombinator.com/item?id=49083705)) "not many big IT departments are going to run critical apps on some old unsupported hackjob" ([source](https://news.ycombinator.com/item?id=46675140)) "try to use Mono which wasn't fully compatible" ([source](https://news.ycombinator.com/item?id=45983421))
- Slower than Microsoft's .NET runtime (2 comments in the sample): "more reliable (and fixable!) and significantly less performant that the Microsoft dotnet runtime" ([source](https://news.ycombinator.com/item?id=50008728)) "always compare performance to the (very slow) baseline Mono" ([source](https://news.ycombinator.com/item?id=46418711))
- Unity stalled updates, frozen GC (1 comment in the sample): "The problem is called Mono, and Unity's refusal to pay for an update." ([source](https://news.ycombinator.com/item?id=47000395))

## Why people recommend it

- Fast, stable and lean (3 comments in the sample): "I switched to the CLI Mono engine, which is much faster (factor two) and much more stable" ([source](https://news.ycombinator.com/item?id=46391539)) "Mono was equally fast as V8 in my measurements but much leaner, and more flexible" ([source](https://news.ycombinator.com/item?id=48310726)) "supports multiple threads and has the higher performance" ([source](https://news.ycombinator.com/item?id=48310597))
- Underrated, long usable on Linux (2 comments in the sample): "Mono was in a usable state on Linux for literal decades before becoming official and integrated into what is core today" ([source](https://news.ycombinator.com/item?id=47702599)) "it should probably get a bit more credit" ([source](https://news.ycombinator.com/item?id=45843848))
- Runs .NET Framework and IL code (1 comment in the sample): "My results show that the Mono engine is surprisingly capable when executing pure IL code" ([source](https://news.ycombinator.com/item?id=46420795))

## Other language runtimes people recommend

- [.NET](https://hackerapproved.com/p/net/): 215 recommend, 53 mixed, 120 criticize
- [BEAM (Erlang VM)](https://hackerapproved.com/p/beam/): 56 recommend, 12 mixed, 12 criticize
- [JVM](https://hackerapproved.com/p/jvm/): 31 recommend, 7 mixed, 21 criticize
- [Java Virtual Machine](https://hackerapproved.com/p/java-virtual-machine/): 28 recommend, 13 mixed, 20 criticize

## The badge

A product earns the Hacker Approved badge when at least 10 people recommend it, recommenders outnumber critics at least 2 to 1 (mixed feelings count toward neither side), it was recommended in at least 4 of the 12 months and in at least 5 different threads, and no single thread supplies more than half of the people who recommend it. Health and money products are never badged.

## Cite as

Hacker Approved, "Mono runtime", https://hackerapproved.com/p/mono/ (5 recommend, 5 mixed, 14 criticize; Hacker News comments, November 2025 to October 2026).

Counts updated 2 Nov 2026, with data through October 31, 2026.