Alternatives
Find free and open source alternatives to popular proprietary software.
Name (A–Z)
Sphere Engine
API Infrastructure
1 open source alternative
Split
Feature Flags
Free
4 open source alternatives
Splitwise
Personal Finance Management
Free
3 open source alternatives
Splunk
Monitoring & Observability
7 open source alternatives
Splunk SOAR
Security Automation (SIEM/SOAR)
1 open source alternative
Spotify
Media & Streaming
$6.99
month
8 open source alternatives
Square Point of Sale
ERP Systems
$49
month
1 open source alternative
Squarespace
Website Builders
5 open source alternatives
Stack Overflow for Teams
Q&A Platforms
$1
month
3 open source alternatives
Start.me
Workspace Organizers
$25
year
5 open source alternatives
Statamic
Traditional & Flat-File CMS
Free
3 open source alternatives
Stats.fm
Personal Tracking Apps
1 open source alternative
Status.io
Status Pages
$79
month
2 open source alternatives
Statuspage
Status Pages
$29
month
1 open source alternative
Steam
Gaming
Free
2 open source alternatives
Stitch
ETL & Data Integration
$100
month
1 open source alternative
Strapi
Headless CMS
$45
month
1 open source alternative
Strava
Personal Tracking Apps
$5.00
month
1 open source alternative
Streaks
Personal Tracking Apps
1 open source alternative
Stream Chat
Team Chat & Messaging
$499
month
1 open source alternative
Streamlabs Desktop
Screen Recording
Free
1 open source alternative
Stripe
Finance & Fintech
Free
3 open source alternatives
Stripe Billing
Finance & Accounting
$0.01
month
4 open source alternatives
Stripo
Email Marketing & Newsletters
$20
month
1 open source alternative
Strong
Personal Tracking Apps
Free
1 open source alternative
StrongDM
SSH Access Management
1 open source alternative
Sublime Text
Code Editors
5 open source alternatives
Subsonic
Gaming
1 open source alternative
Substack
Publishing
Free
1 open source alternative
Supabase
Frameworks & Platforms
$25
month
3 open source alternatives
Open Source Software.io
Join our newsletter to get shiny new open source software delivered to your inbox. Unsubscribe anytime.