Alternatives
Find free and open source alternatives to popular proprietary software.
Name (A–Z)
Nutanix Cloud Platform
Cloud Computing
$0.061
month
1 open source alternative
Obsidian
Notes & Knowledge
$4
month
13 open source alternatives
Octoparse
Web Scraping
$69
month
1 open source alternative
Octopus Deploy
CI/CD Platforms
$2,080
year
1 open source alternative
Okta
Identity & Access Management (IAM)
$6
month
5 open source alternatives
Okta Privileged Access
SSH Access Management
$6
month
1 open source alternative
OnBoard
Collaborative Workspaces
$25
month
1 open source alternative
OneCal
Appointment Scheduling
$5
month
1 open source alternative
OneDrive
File Management & Sync
$1.99
month
1 open source alternative
OneSignal
Customer Communication Platforms
$19
month
5 open source alternatives
OpenAI
AI Gateways
$20
month
1 open source alternative
OpenAI Assistants API
AI Agent Platforms
2 open source alternatives
OpenDNS
Encrypted Communication
1 open source alternative
OpenRouter
AI Gateways
3 open source alternatives
OpenVPN Access Server
VPN & Secure Access
$7
month
2 open source alternatives
OpenWeatherMap
API Infrastructure
1 open source alternative
Opendatasoft
Data Visualization
1 open source alternative
Opsgenie
Customer Support & Success
$9.45
month
1 open source alternative
OptiSigns
Marketing & Customer Engagement
$9
month
1 open source alternative
Optimizely
AI Development Platforms
2 open source alternatives
Oracle APEX
Low-Code/No-Code
1 open source alternative
Oracle Transportation Management
Logistics & Supply Chain
1 open source alternative
Orb
Finance & Accounting
1 open source alternative
Otter.ai
Notes & Knowledge
$4.17
month
5 open source alternatives
OutSystems
AI Development Platforms
Free
3 open source alternatives
Outlook
Email & Communication
$6
month
1 open source alternative
Overcast
Media Servers
1 open source alternative
Overseerr
Media Servers
Free
1 open source alternative
POEditor
Translation Management
$20
month
1 open source alternative
PRTG
Infrastructure Monitoring
$200
month
1 open source alternative
Open Source Software.io
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