Top 8 Go Captcha Projects

SafeLine

1 189 17,051 8.9 Go

SafeLine is a self-hosted WAF(Web Application Firewall) / reverse proxy to protect your web apps from attacks and exploits.

Project mention: Free WAFs Compared: Which One Should You Trust? | dev.to | 2025-06-10

SafeLine
InfluxDB

www.influxdata.com featured

InfluxDB – Built for High-Performance Time Series Workloads. InfluxDB 3 OSS is now GA. Transform, enrich, and act on time series data directly in the database. Automate critical tasks and eliminate the need to move data externally. Download now.
base64Captcha

2 0 2,262 4.1 Go

captcha of base64 image string
captcha

3 1 2,011 2.0 Go

Go package captcha implements generation and verification of image and audio CAPTCHAs. (by dchest)
go-captcha

4 1 1,977 5.9 Go

🖖 GoCaptcha is a behavior captcha, which implements click mode, slider mode, drag-drop mode and rotation mode.
aaWAF

5 2 533 8.7 Go

堡塔云WAF，宝塔免费(free)的私有云网站应用防火墙(firewall)，基于docker/nginx/lua开发

Project mention: Top Open-Source WAF Projects: Secure Your Website with the Best Tools | dev.to | 2024-08-19

Official GitHub: NAXSI Stars: 4.8K
captcha

6 0 159 3.2 Go

:sunglasses:Package captcha provides an easy to use, unopinionated API for captcha generation
captcha-go

7 1 8 10.0 Go

A Go module for verifying captcha responses from Cloudflare Turnstile, Google reCAPTCHA v2 (checkbox and invisible), reCAPTCHA v3 or any other custom endpoint.
Stream

getstream.io featured

Stream - Scalable APIs for Chat, Feeds, Moderation, & Video. Stream helps developers build engaging apps that scale to millions with performant and flexible Chat, Feeds, Moderation, and Video APIs and SDKs powered by a global edge network and enterprise-grade infrastructure.
verity

8 1 6 4.4 Go

A tiny, super fast server for Altcha. (by Flameborn)

Project mention: Verity – A tiny and super fast open-source server for Altcha | news.ycombinator.com | 2025-02-26

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 Captcha discussion

Index

What are some of the best open-source Captcha projects in Go? This list will help you:

#	Project	Stars
1	SafeLine	17,051
2	base64Captcha	2,262
3	captcha	2,011
4	go-captcha	1,977
5	aaWAF	533
6	captcha	159
7	captcha-go	8
8	verity	6