#1 Developer ToolsFree
elmah.io — alternative #1 to CatchJS.com
Error logging and uptime monitoring for web developers. Free Small Business subscription for open-source projects.
Catalogue source
Recorded alternatives
Alternatives to CatchJS.com
Every candidate below sits in Developer Tools. What ends up on this page is decided entirely by a recorded score — not by bidding, not by editor taste. Review both records, check current vendor terms, then decide.
#2 Developer ToolsFree
meterian.io — alternative #2 to CatchJS.com
Monitor Java, Javascript, .NET, Scala, Ruby, and NodeJS projects for security vulnerabilities in dependencies. Free for one private project,...
Catalogue source
#3 Developer ToolsFree
CloudCertPrep — alternative #3 to CatchJS.com
Free, open-source AWS certification practice exams with 1,050+ questions for CLF-C02. Features timed mock exams, domain practice, spaced rep...
Catalogue source
#4 Developer ToolsFreemium
Cloudsmith :heavydollarsign — alternative #4 to CatchJS.com
A fully managed package management SaaS, with first-class support for public and private Cargo/Rust registries (plus many others). Free for...
Catalogue source
#5 Developer ToolsFree
docker-handbook-projects — alternative #5 to CatchJS.com
The Docker Handbook An open-source book that teaches you the fundamentals, best practices and some intermediate Docker functionalities. The...
GitHub source
#6 Developer ToolsFree
gocryforhelp — alternative #6 to CatchJS.com
Collection of Go projects that needs help. Good place to start your open-source way in Go.
GitHub source
#7 Developer ToolsFreemium
KaiMail — alternative #7 to CatchJS.com
Email forwarding for custom domains with ARC/DKIM signing. Free plan includes 1 domain, 1 mailbox, 300 emails/month, and up to 1MB message s...
Catalogue source
#8 Developer ToolsFree
osv-mcp — alternative #8 to CatchJS.com
🏎️ ☁️ - به پایگاه داده OSV (Open Source Vulnerabilities) برای اطلاعات آسیبپذیری دسترسی پیدا کنید. آسیبپذیریها را بر اساس نسخه بسته یا com...
GitHub source
Questions about this page
How were these alternatives selected?
Each candidate is a live catalogue record in the same primary category, picked by a deterministic score that Oryxen records in its catalogue: how many meaningful words the two listings share, whether their pricing classes oppose (a paid product against a free one), whether both are open source, and whether either record is featured. The same catalogue state always produces the same list — no randomness, no manual ranking.
Are these alternatives ranked by payment?
No. Rows are ordered only by the recorded score, highest first, with alphabetical ties — payment never influences the order, nothing here is paid placement, and Oryxen charges no listing or placement fee.
Always verify current terms with CatchJS.com directly — Oryxen records pricing classes, not live quotes.