Sblam!
Open-source implementation of server-side spam filtering of blog comments and forum posts.
17 Alternatives To Sblam!
AbuseIPDB
AbuseIPDB is an IP address blacklist for webmasters and sysadmins to report IP addresses engaging in abusive behavior on their networks, or check the report history of any IP.
Akismet
Akismet is a spam fighting service that protects millions of WordPress sites from comment and contact form spam.
Antispam Bee
Say Goodbye to comment spam on your WordPress blog or website.
Cerber Security
Defends WordPress against hacker attacks, spam, trojans and malware.
Confident Captcha
Confident Technologies provides free CAPTCHA security software called Confident CAPTCHA, a picture…
ConvertKit
Email marketing software for online creators. We help you earn a living online through an intuitive email marketing automation tool.
GeeTest CAPTCHA
GeeTest protects your websites, mobile Apps and APIs from bot threats.
MTcaptcha
Enterprise Captcha solutions
Mollom
Mollom is a freemium web service to get rid of spam, unwanted content and fake users on your…
NoMoreCaptchas
What Does NoMoreCaptchas Do?
Purple WiFi
Oct 4, 2017 - Spectators that attended the Los Pumas vs All Blacks game on Saturday were able to enjoy high-speed connectivity and share memories of the game thanks to Efan, Cisco Meraki and Purple’s WiFi and analytics solution.
Securimage
Securimage is a script for generating complex images and CAPTCHA codes to protect forms from spam…
SocialNourish
SocialNourish is a twitter management and marketing tool, used by thousands to increase twitter followers, SocialNourish let you manage multiple twitter accounts and help to clean the account and improve follower/following ratio.
UniqPin
UniqPin is a free for non-commercial use service which destiny improve ability of interfaces detect…
Web Form SPAM Protection
With this utility you can easily enrypt your html web forms and protect them against SPAM e-mails
hCaptcha
Do you use a captcha to keep out bots? hCaptcha is a drop-in replacement for reCAPTCHA that earns website owners money and helps companies get their data labeled.
reCAPTCHA
reCAPTCHA is a free security service that protects your websites from spam and abuse.