Browse 10,978 open-source alternatives
By the SaaS they replace, the language they're built in, or what they do.
SaaS-replacement categories
Categories with hand-curated SaaS-replacement pages. Browse all SaaS-replace pages →
Hosting / PaaS 4Product analytics 3Social media scheduling 3Privacy-first web analytics 2BI / Data visualization 2Issue tracking 2Database 2Messaging 2Automation 2Web analytics 1BI / Data modeling 1Team chat 1Community chat 1Payments 1Cache / DB 1Design / Whiteboard 1Backend-as-a-service 1Search-as-a-service 1Video conferencing 1File sync / Cloud storage 1Wiki / Notes / Docs 1Code hosting 1CI/CD 1BaaS 1Project management 1Password manager 1Database / Spreadsheet 1CMS 1Note-taking / Wiki 1DevOps platform 1CRM 1Note-taking 1Project management / Kanban 1Log / SIEM 1Monitoring 1Monitoring / APM 1Scheduling 1CRM / Marketing 1Customer support / Chat 1Helpdesk / Support 1Forms / Surveys 1Email marketing 1Transactional email 1Error tracking 1
By programming language
75 languages with 50+ stars projects. Click a project to see its health score, cost to self-host, and security history.
Go
2057 projects
Swift
1180 projects
Python
1066 projects
TypeScript
649 projects
JavaScript
635 projects
Objective-C
335 projects
PHP
182 projects
C++
117 projects
Other
96 projects
Java
91 projects
Ruby
67 projects
HTML
66 projects
Jupyter Notebook
47 projects
Shell
46 projects
Julia
37 projects
Kotlin
36 projects
CSS
22 projects
Lua
18 projects
Popular topics
From GitHub topic tags. 80 topics with 3+ projects (100+ stars).
golang 938go 830rust 801swift 699python 608ios 571hacktoberfest 515javascript 369machine-learning 272self-hosted 256mcp 241cli 231ai 213cocoapods 205docker 192react 192database 190typescript 185mcp-server 161macos 160llm 153linux 135php 134carthage 132deep-learning 124open-source 119terminal 116animation 111postgresql 110mysql 109security 107data-science 107json 106framework 105testing 104nodejs 103sql 103http 101web 99objective-c 97xcode 95ui 93developer-tools 90kubernetes 89android 88library 87tui 85sqlite 81api 81windows 80server 71privacy 71vue 69automation 68cross-platform 68command-line 67uikit 67golang-library 67markdown 66tvos 66ai-agents 63html 63claude 62model-context-protocol 60pytorch 60java 60video 59rust-lang 59networking 58monitoring 56analytics 56redis 56artificial-intelligence 55git 55devops 53awesome 53performance 52django 52selfhosted 51openai 51