Alternatives
Find free and open source alternatives to popular proprietary software.
Name (A–Z)
CircleCI
Build & Deployment
$15
month
3 open source alternatives
Cisco AnyConnect
VPN & Secure Access
3 open source alternatives
Cisco Umbrella
Encrypted Communication
2 open source alternatives
Cisco Unified Communications Manager
Media Servers
4 open source alternatives
Cisco Webex
Video Conferencing & Virtual Office
2 open source alternatives
Clash for Windows
Networking & Connectivity
Free
1 open source alternative
Claude
AI Development Platforms
$17
month
3 open source alternatives
Claude
AI Development Platforms
$17
month
7 open source alternatives
Claude Design
Design & Prototyping
$20
month
3 open source alternatives
CleanShot X
Screen Capture & Recording
$29
one-time
2 open source alternatives
Clerk
Identity & Access Management (IAM)
$20
month
3 open source alternatives
CleverTap
Marketing Automation
$75
month
1 open source alternative
ClickUp
Project & Work Management
$7
month
2 open source alternatives
Clicky
Web Analytics
$9.99
month
1 open source alternative
Clientexec
Full-Stack E-commerce
$16.95
month
1 open source alternative
Clip Studio Paint
Photo Editors
$0.99
month
1 open source alternative
Clockify
Time & Task Management
$5.49
month
2 open source alternatives
CloudConvert
File Management
Free
3 open source alternatives
CloudHealth
Cloud Cost & Optimization
$1,000
month
1 open source alternative
Cloudbeds
Appointment Scheduling
1 open source alternative
Cloudflare
CAPTCHA & Bot Protection
$20
month
3 open source alternatives
Cloudflare AI Gateway
$0.05
2 open source alternatives
Cloudflare Bot Management
CAPTCHA & Bot Protection
$20
month
1 open source alternative
Cloudflare Tunnel
Networking & Connectivity
1 open source alternative
Cloudflare Turnstile
Application Security
$20
month
3 open source alternatives
Cloudflare Zero Trust
VPN & Secure Access
$7
month
1 open source alternative
Cloudinary
Digital Asset Management (DAM)
$99
month
4 open source alternatives
Cloudron
Control Panels
15€
month
1 open source alternative
Cloze
CRM Systems
$17
month
1 open source alternative
Code Climate Velocity
BI Platforms
1 open source alternative
Open Source Software.io
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