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Top 12 Go Regex Projects
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rare
Create terminal-based histograms, bar graphs, tables, heatmaps and more in realtime using regex and expressions. (by zix99)
Project mention: TIL about rare, a CLI aggregation visualization tool | news.ycombinator.com | 2026-01-26 -
coregex
Pure Go production-grade regex engine with SIMD optimizations. Up to 3-3000x+ faster than stdlib.
Project mention: We Built the First Pure Go DXIL Generator — Because Optimizing the Wrong Path Wasn't Enough | dev.to | 2026-04-05We weren't afraid of binary formats. Before gogpu, we built scigolib/hdf5 — a Pure Go implementation of HDF5, NASA's hierarchical data format with its own B-tree indices, chunked storage, and compression pipelines. After parsing HDF5 superblocks and fractal heaps in pure Go, LLVM bitcode felt almost... reasonable. We also built coregx/coregex — a regex engine from scratch. Binary formats, state machines, low-level encoding — this is what we do.
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run-all
run-all is a command-line tool that allows you to execute commands across multiple directories based on a customizable directory pattern.
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Project mention: Cursor's latest "browser experiment" implied success without evidence | news.ycombinator.com | 2026-01-16
Not me personally, but a GitHub user wrote a replacement for Go's regexp library that was "up to 3-3000x+ faster than stdlib": https://github.com/coregx/coregex ... at first I was impressed, so started testing it and reporting bugs, but as soon as I ran my own benchmarks, it all fell apart (https://github.com/coregx/coregex/issues/29). After some mostly-bot updates, that issue was closed. But someone else opened a very similar one recently (https://github.com/coregx/coregex/issues/79) -- same deal, "actually, it's slower than the stdlib in my tests". Basically AI slop with poor tests, poor benchmarks, and way oversold. How he's positioning these projects is the problematic bit, I reckon, not the use of AI.
Same user did a similar thing by creating an AWK interpreter written in Go using LLMs: https://github.com/kolkov/uawk -- as the creator of (I think?) the only AWK interpreter written in Go (https://github.com/benhoyt/goawk), I was curious. It turns out that if there's only one item in the training data (GoAWK), AI likes to copy and paste freely from the original. But again, it's poorly tested and poorly benchmarked.
I just don't see how one can get quality like this, without being realistic about code review, testing, and benchmarking.
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matchgo
matchgo is a minimalistic regex engine that allows you to compile regex patterns, check strings for matches, and extract matched groups.
NOTE:
The open source projects on this list are ordered by number of github stars.
The number of mentions indicates repo mentiontions in the last 12 Months or
since we started tracking (Dec 2020).
Go Regex discussion
Go Regex related posts
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TIL about rare, a CLI aggregation visualization tool
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Best regexp alternative for Go. Benchmarks. Plots.
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Regex RE2 doesn't support specific Turkish characters.
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Show a man-like interface
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I added heatmaps to my realtime text visualizer, rare (Also: histograms, tables, bargraphs, etc)
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Added heatmaps to my realtime text analysis tool, rare
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badkeys - checking cryptographic keys for known vulnerabilities
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A note from our sponsor - SaaSHub
www.saashub.com | 15 Jun 2026
Index
What are some of the best open-source Regex projects in Go? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | regexp2 | 1,150 |
| 2 | rare | 352 |
| 3 | coregex | 223 |
| 4 | codesearch | 52 |
| 5 | run-all | 23 |
| 6 | colorgrep | 19 |
| 7 | pcre | 16 |
| 8 | go-regex | 12 |
| 9 | sfmatch | 8 |
| 10 | uawk | 6 |
| 11 | regexcmp | 5 |
| 12 | matchgo | 0 |
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