Side by side

Opal vs Transcrypt

Opal

6.4#12 in code transpilersFree plan

Free planWebLinuxmacOSWindows

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Transcrypt

6.7#3 in code transpilersFree plan

Free planWebLinuxmacOSSelf-hosted

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What both publish

Fact	Opal	Transcrypt
Support	The project directs users to Slack, Stack Overflow with the #opalrb tag, and GitHub issues for bugs and feature requests.	The FAQ recommends Stack Overflow for help and says commercial support is available on demand.
What it does	Opal is a Ruby-to-JavaScript source-to-source compiler that includes an implementation of Ruby corelib and stdlib.	Transcrypt compiles a fairly extensive subset of Python into compact, readable JavaScript.

Opal plans

OpalFree

Transcrypt plans

TranscryptFree

Pick Opal if…

Opal suits Ruby developers who want to use Ruby code in browser or JavaScript environments. Its ES2021 target and lack of older-engine fallback are relevant for teams choosing where that code will run.

Pick Transcrypt if…

Transcrypt suits Python developers building browser applications who want to work with JavaScript libraries and DOM functions. It may also suit teams compiling Python server code for Node.js.

Charts they share

Code Transpilers