Alternatives
Find free and open source alternatives to popular proprietary software.
Name (A–Z)
Insomnia
API Development & Testing
$12
month
4 open source alternatives
Instagram
Decentralized Social Networks
Free
1 open source alternative
Instagram Reels
Decentralized Social Networks
Free
1 open source alternative
Instapaper
Read-it-Later & Knowledge Hubs
Free
2 open source alternatives
Intercom
Customer Support & Success
$19
month
5 open source alternatives
Internet Archive Wayback Machine
Web Crawlers
Free
1 open source alternative
Internet Download Manager
File Management & Sync
$9.95
year
3 open source alternatives
Invideo
Photo & Video Editors
1 open source alternative
Invision Community
Forum Software
$89
month
5 open source alternatives
IrfanView
Photo & Video Editors
$18
one-time
1 open source alternative
JDoodle
API Infrastructure
Free
1 open source alternative
JFrog Artifactory
Storage
$50
month
2 open source alternatives
JPEGmini
File Management
$59
one-time
1 open source alternative
JRiver Media Center
Media Servers
$79.98
one-time
1 open source alternative
JSFiddle
Code Editors
1 open source alternative
Jellyfin
Media Servers
Free
1 open source alternative
Jenkins
Build & Deployment
Free
1 open source alternative
Jira
Project & Work Management
$7.91
month
12 open source alternatives
Jira Service Management
Helpdesk Software
$20
month
1 open source alternative
Jotform
Forms & Surveys
3 open source alternatives
JustWatch
Media & Streaming
Free
1 open source alternative
Kaedim
AI Agent Platforms
1 open source alternative
Kahoot!
Survey Tools
$3
month
1 open source alternative
KaraFun
Media Servers
$9.99
month
1 open source alternative
Keepa
Web Crawlers
Free
1 open source alternative
Kentico
Traditional & Flat-File CMS
3 open source alternatives
Kirby
Traditional & Flat-File CMS
1 open source alternative
Klue
AI Agent Platforms
1 open source alternative
Kong AI Gateway
AI Development Platforms
$100
month
1 open source alternative
Kong Konnect
API Development & Testing
$0.15
1 open source alternative
Open Source Software.io
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