# Updated list of Ada compilers
**URL:** https://forum.ada-lang.io/t/updated-list-of-ada-compilers/1099
**Category:** General
**Created:** [August 19, 2024, 5:08pm UTC](https://forum.ada-lang.io/t/updated-list-of-ada-compilers/1099 "2024-08-19T17:08:24Z")
**Posts on this page:** 20
**Page:** 1
### Author:  [@RDR](https://forum.ada-lang.io/u/RDR)
#### Post date: [August 19, 2024, 5:08pm UTC](https://forum.ada-lang.io/t/updated-list-of-ada-compilers/1099/1 "2024-08-19T17:08:24Z")
We need an updated list of sources for Ada compilers. I know we have AdaCore and PLT.
One of my clients uses Green Hills for embedded avionics.
I am pretty sure Randy still supports Janus Ada.
Dan Eiler’s seems to be out-of-business.
Any others that are still supported.
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### Author:  [@JeremyGrosser](https://forum.ada-lang.io/u/JeremyGrosser)
#### Post date: [August 19, 2024, 5:58pm UTC](https://forum.ada-lang.io/t/updated-list-of-ada-compilers/1099/2 "2024-08-19T17:58:40Z")
There’s [HAC](https://github.com/zertovitch/hac), though I’m not sure how much of ACATS passes with it.
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### Author:  [@Lucretia](https://forum.ada-lang.io/u/Lucretia)
#### Post date: [August 19, 2024, 6:30pm UTC](https://forum.ada-lang.io/t/updated-list-of-ada-compilers/1099/3 "2024-08-19T18:30:25Z")
Why? How many are you likely to use in open source? One.
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### Author:  [@DirkCraeynest](https://forum.ada-lang.io/u/DirkCraeynest)
#### Post date: [August 19, 2024, 6:30pm UTC](https://forum.ada-lang.io/t/updated-list-of-ada-compilers/1099/4 "2024-08-19T18:30:52Z")
There’s also PowerAda from OC Systems, an Ada95 compiler: [OCS:PowerAda - OC Systems Wiki!](https://www.ocsystems.com/w/index.php/OCS:PowerAda)
About: “I know we have AdaCore and PLT.”
Instead of PLT, I presume you mean PTC, who distribute PTCObjectAda and PTCApexAda, Ada 2012 and Ada 95 compilers resp.
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### Author:  [@DirkCraeynest](https://forum.ada-lang.io/u/DirkCraeynest)
#### Post date: [August 19, 2024, 6:34pm UTC](https://forum.ada-lang.io/t/updated-list-of-ada-compilers/1099/5 "2024-08-19T18:34:08Z")
For open source development, PTC also provides ObjectAda for free (as in “free beer”)…
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### Author:  [@Lucretia](https://forum.ada-lang.io/u/Lucretia)
#### Post date: [August 19, 2024, 6:36pm UTC](https://forum.ada-lang.io/t/updated-list-of-ada-compilers/1099/6 "2024-08-19T18:36:09Z")
Yeah, but who really is going to use a compiler they can’t compile themselves?
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### Author:  [@DirkCraeynest](https://forum.ada-lang.io/u/DirkCraeynest)
#### Post date: [August 19, 2024, 6:41pm UTC](https://forum.ada-lang.io/t/updated-list-of-ada-compilers/1099/7 "2024-08-19T18:41:25Z")
Not downplaying the value of being able to do that, but I do wonder how many of the Ada users do compile their Ada compiler and runtime themselves?
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### Author:  [@Lucretia](https://forum.ada-lang.io/u/Lucretia)
#### Post date: [August 19, 2024, 6:49pm UTC](https://forum.ada-lang.io/t/updated-list-of-ada-compilers/1099/8 "2024-08-19T18:49:37Z")
How many people use closed source C, C++ compilers, I’m not talking companies who will pay for them, but people, like those on GH.
Creating a list of compilers for Ada is fundamentally pointless. I’ve never seen anyone from C or C++ land want the same kind of list.
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### Author:  [@jere](https://forum.ada-lang.io/u/jere)
#### Post date: [August 19, 2024, 7:51pm UTC](https://forum.ada-lang.io/t/updated-list-of-ada-compilers/1099/11 "2024-08-19T19:51:15Z")
I haven’t done homework to verify what is still supported or not, but as a data point, awesome-ada has a list of compilers (and can be updated if out of date):
> **[GitHub - ohenley/awesome-ada: A curated list of awesome resources related to the...](https://github.com/ohenley/awesome-ada?tab=readme-ov-file#compilers)**
>
> A curated list of awesome resources related to the Ada and SPARK programming language
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### Author:  [@pyj](https://forum.ada-lang.io/u/pyj)
#### Post date: [August 19, 2024, 11:01pm UTC](https://forum.ada-lang.io/t/updated-list-of-ada-compilers/1099/12 "2024-08-19T23:01:29Z")
> [@Lucretia](#):
>
> How many people use closed source C, C++ compilers, I’m not talking companies who will pay for them, but people, like those on GH.
Lots of C++ programmers use MSVC. Intel’s C++ compiler also comes to mind. Usually when I’m writing C++ I like to set up GCC/Clang/MSVC since they’ll each catch things the others don’t.
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### Author:  [@Lucretia](https://forum.ada-lang.io/u/Lucretia)
#### Post date: [August 20, 2024, 7:41am UTC](https://forum.ada-lang.io/t/updated-list-of-ada-compilers/1099/13 "2024-08-20T07:41:46Z")
Those are available to us. Most Ada compilers are not.
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### Author:  [@JC001](https://forum.ada-lang.io/u/JC001)
#### Post date: [August 21, 2024, 11:04am UTC](https://forum.ada-lang.io/t/updated-list-of-ada-compilers/1099/14 "2024-08-21T11:04:24Z")
> [@Lucretia](#):
>
> How many are you likely to use in open source?
As many as I can. Currently I use two Ada-12 compilers. This helps guarantee that my S/W is Ada 12, not taking advantage of some compiler error.
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### Author:  [@RDR](https://forum.ada-lang.io/u/RDR)
#### Post date: [September 30, 2024, 8:53pm UTC](https://forum.ada-lang.io/t/updated-list-of-ada-compilers/1099/15 "2024-09-30T20:53:53Z")
Yes, Dirk. I meant PTC. What embedded platforms does PTC support. I recall one of the the platforms was the Boeing 777. The Green Hills Ada compiler used by my [now former] client is good for its run-time efficiency. However, they are also conservative in what feature they use beyond those that were in the original Ada 83 standard.
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### Author:  [@Micronian2](https://forum.ada-lang.io/u/Micronian2)
#### Post date: [October 1, 2024, 2:50am UTC](https://forum.ada-lang.io/t/updated-list-of-ada-compilers/1099/16 "2024-10-01T02:50:50Z")
In their last product presentation, they mentioned they support bare bones ARM targets. They may have mentioned others as well, but I don’t remember.
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### Author:  [@Laurent](https://forum.ada-lang.io/u/Laurent)
#### Post date: [October 28, 2025, 4:33pm UTC](https://forum.ada-lang.io/t/updated-list-of-ada-compilers/1099/17 "2025-10-28T16:33:37Z")
DDC-I still supplies Ada as well.
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### Author:  [@mgrojo](https://forum.ada-lang.io/u/mgrojo)
#### Post date: [October 28, 2025, 9:47pm UTC](https://forum.ada-lang.io/t/updated-list-of-ada-compilers/1099/18 "2025-10-28T21:47:42Z")
I recently [removed XGC from the awesome-ada list](https://github.com/ohenley/awesome-ada/commit/199444f2420dd079027500bb171d07c61aa7c0ca), because the website has disappeared and haven’t found any trace of them, so I assume they’ve closed. If someone knows that they have just moved, please, open a pull request.
> [@Laurent](#):
>
> DDC-I still supplies Ada as well.
Should that be added to the awesome-ada list?
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### Author:  [@AdaOrbit](https://forum.ada-lang.io/u/AdaOrbit)
#### Post date: [October 28, 2025, 10:27pm UTC](https://forum.ada-lang.io/t/updated-list-of-ada-compilers/1099/19 "2025-10-28T22:27:43Z")
There are still a number of old ada compilers being licensed. I don’t know when and where I found this but [here is one of them](http://irvine.com/products.html). They only have support for Ada83 and Ada95 tho. (2005 edition is still in beta 😃 )
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### Author:  [@DirkCraeynest](https://forum.ada-lang.io/u/DirkCraeynest)
#### Post date: [October 30, 2025, 7:23am UTC](https://forum.ada-lang.io/t/updated-list-of-ada-compilers/1099/20 "2025-10-30T07:23:36Z")
> [@mgrojo](#):
>
> I recently [removed XGC from the awesome-ada list](https://github.com/ohenley/awesome-ada/commit/199444f2420dd079027500bb171d07c61aa7c0ca), because the website has disappeared and haven’t found any trace of them, so I assume they’ve closed.
XGC Technology is/was Chris Nettleton. Unfortunately, Chris died on June 4th 2025. Not sure what happens with the tools he supported…
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### Author:  [@Some.Guy.at.32940](https://forum.ada-lang.io/u/Some.Guy.at.32940)
#### Post date: [February 7, 2026, 3:50am UTC](https://forum.ada-lang.io/t/updated-list-of-ada-compilers/1099/21 "2026-02-07T03:50:36Z")
I’m not a fan of Green Hills, having inherited the task of maintaining a legacy application that was embedded self-test code for avionics boxes. The legacy code included a bunch of “garbage” from some public source code repository which was so horrible, that it crashed the Green Hills compiler! Yes! You read that right!
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### Author:  [@YaoFei509](https://forum.ada-lang.io/u/YaoFei509)
#### Post date: [July 8, 2026, 6:12am UTC](https://forum.ada-lang.io/t/updated-list-of-ada-compilers/1099/22 "2026-07-08T06:12:19Z")
Oh, RIP.
Chris is a very kind man , God bless him.