Open-source alternatives to popular software
OSS Alternatives covers a small number of proprietary tools in depth rather than a large, shallow directory. Each page below ranks genuinely open-source alternatives by GitHub activity and spells out license, self-hosting, and pricing so you can pick one with confidence.
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Popular alternatives
Apple Photos
Photo and video library synced across Apple devices with iCloud
4 alternatives
Google Workspace
Productivity suite with Gmail, Drive, Docs, Sheets, and Meet
5 alternatives
BigCommerce
Hosted SaaS ecommerce platform for online stores
9 alternatives
Skype
Video calling and messaging app retired by Microsoft in 2025
5 alternatives
Emergent
AI app builder that generates full-stack apps from prompts
2 alternatives
SAP
Enterprise resource planning software for finance, supply chain, and HR
4 alternatives
Grammarly
AI writing assistant for grammar, spelling, tone, and style
2 alternatives
Umbrel
Home server OS with an app store for self-hosting
3 alternatives
Tally
Free form builder with unlimited forms and submissions
6 alternatives
Firebase
Backend platform for apps with databases, authentication, and hosting
14 alternatives
Skool
Community, courses, and events platform for creators and coaches
7 alternatives
HubSpot
CRM and marketing platform for sales, marketing, service, and content
13 alternatives
Atlas
OpenAI's ChatGPT Atlas browser with a built-in AI assistant and agent mode
9 alternatives
Manus
General-purpose AI agent that carries out tasks autonomously
3 alternatives
LiveChat
Live chat and customer support software for websites
6 alternatives
Antigravity
Google's agent-first AI development environment
9 alternatives
Telegram
Cloud-based messenger with chats, channels, groups, bots, and calls
5 alternatives
Clerk
Drop-in authentication and user management for modern web apps
9 alternatives
Semrush
SEO and marketing platform for keywords, backlinks, rankings, and competitors
1 alternative
Life360
Family location sharing, safety alerts, and driving reports
1 alternative
Base44
AI app builder that creates and hosts full-stack apps from prompts
3 alternatives
1Password
Password manager and secrets platform for individuals, families, and teams
10 alternatives
Filmora
Consumer video editor with templates, effects, and AI tools
5 alternatives
CCleaner
System cleaner for junk files, browser data, registry, and startup items
3 alternatives
CodeGPT
AI coding assistant for IDEs with chat, completions, and agents
9 alternatives
Opsgenie
Alerting, on-call scheduling, and incident management for operations teams
8 alternatives
Stripe Billing
Subscription billing, usage-based pricing, and invoicing on Stripe
10 alternatives
Social network for friends, groups, pages, photos, and video
4 alternatives
Snowflake
Cloud data warehouse and analytics platform
10 alternatives
Youform
Online form and survey builder with conditional logic and integrations
7 alternatives
Framer
Visual website builder with design, animation, CMS, and hosting
10 alternatives
MongoDB
Document database for flexible JSON-like data at scale
8 alternatives
TV Time
TV show and movie tracker with episode progress, reminders, and community
3 alternatives
OpenRouter
Unified API and marketplace for accessing many LLMs through one endpoint
3 alternatives
Jina AI
Search foundation APIs for web reading, embeddings, rerankers, and AI search
4 alternatives
Microsoft Office
Word, Excel, PowerPoint, and Outlook productivity suite
3 alternatives
Calendly
Scheduling and booking links for meetings and appointments
3 alternatives
Salesforce
Enterprise CRM platform for sales, service, marketing, and customization
12 alternatives
Substack
Newsletter and publishing platform with paid subscriptions
8 alternatives
Attio
Customizable CRM with flexible data models and AI automation
13 alternatives
Apple Maps
Apple's maps and navigation app for iPhone, Mac, and CarPlay
3 alternatives
Datadog
Cloud monitoring and observability for metrics, logs, traces, and security
33 alternatives
Keeper
Password manager and secrets platform for individuals, teams, and enterprises
11 alternatives
Google Sheets
Browser-based spreadsheets with real-time collaboration
9 alternatives
YNAB
Zero-based budgeting app for planning and tracking every dollar
12 alternatives
Comet
Perplexity's AI-powered browser with a built-in assistant and agents
10 alternatives
Google Chrome
Google's Chromium-based web browser with Google account sync
8 alternatives
QuickBooks
Accounting, invoicing, expenses, payroll, and small business finance software
8 alternatives
Raindrop
Bookmark manager for collections, tags, highlights, and web archiving
10 alternatives
NordVPN
Commercial consumer VPN service with a global server network
2 alternatives