Open Source Alternatives to Popular Software
Over 1 million users replaced their proprietary tools with open source software. Discover the best alternatives and join the movement.
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End-to-end encrypted location sharing for groups
Stars
53Last commit
26 days agoLicense
AGPL-3.0
Share your real-time location with family and friends using end-to-end encryption, geofence alerts, travel history, and multi-device tracking.
Open Source Alternative to:
Build complex automations without code, deploy anywhere with full control
Stars
53Last commit
2 months agoLicense
MIT
Open-source no-code automation platform for logistics, chatbots, and AI agents. Deploy on cloud, self-host, or hybrid with complete data sovereignty and modular workflow design.
Open Source Alternative to:
Email inbox API built for AI agents and workflows
Stars
38Last commit
10 days agoLicense
MIT
Provides AI agents with real email inboxes via REST API. Create inboxes instantly, send and receive messages, search threads, and handle attachments programmatically.
Streamline investor relations and fundraising management
Stars
61Last commit
6 months agoLicense
AGPL-3.0
Open source platform for managing investor updates, KPIs, fundraising pipeline and data rooms. Keep stakeholders informed and organized.
Open Source Alternative to:
Privacy-focused note-taking made simple and fast
Stars
67Last commit
7 months agoLicense
GPL-2.0
Justnote is a secure note-taking app that lets you easily create and sync notes across devices while maintaining full control of your data.
Open Source Alternative to:
Secure, encrypted forms with advanced features
Stars
45Last commit
23 days agoLicense
AGPL-3.0
Build end-to-end encrypted forms with enterprise-grade features, no coding required. Protect sensitive data and enhance user trust.
Open Source Alternative to:
AI-powered root cause analysis for on-call alerts, self-hosted and air-gapped
Stars
35Last commit
1 day agoLicense
Apache-2.0
Receive alerts from Grafana, Datadog, and Prometheus with AI-generated root cause analysis. Self-hosted on Kubernetes, fully air-gapped capable, Apache 2.0 licensed.
Open Source Alternative to:
Invisible bot protection that respects user privacy
Stars
32Last commit
3 days agoLicense
MPL-2.0
Privacy-compliant CAPTCHA alternative using proof-of-work technology. Protects websites from bots and spam without user interaction or data tracking.
Open Source Alternative to:
Self-hosted visual bug reporting with screenshot annotation
Stars
30Last commit
2 days agoLicense
AGPL-3.0
Embeds a lightweight widget into web apps so users can capture screenshots, annotate issues, and submit reports with console logs and browser metadata included.
Open Source Alternative to:
Turn user feedback into features that matter
Stars
33Last commit
2 days agoLicense
SSPL-1.0
Collect feedback, prioritize with AI-powered voting, and share transparent roadmaps. Build products users love with automated triage and seamless integration.
Open Source Alternative to:
Event ticketing with no per-ticket platform fees
Stars
31Last commit
11 hours agoLicense
AGPL-3.0
Sell tickets for £50/year with payments, QR check-in, refunds, reporting, and a hosted booking site. Self-hostable under AGPL-3.0.
Open Source Alternative to:
Self-hosted sticky notes with better organization
Stars
30Last commit
11 hours agoLicense
MIT
A self-hosted, open-source note-taking app that keeps the Google Keep sticky-note feel while adding folders, timelines, list views, and import support.
Open Source Alternative to:
Privacy-first newsletter platform without tracking
Stars
32Last commit
12 days agoLicense
AGPL-3.0
Create and send newsletters with complete privacy protection. No tracking, no data collection - just simple, clean email delivery with customizable templates and archive sites.
Open Source Alternative to:
AI-powered task management with radical focus
Stars
26Last commit
6 months agoLicense
AGPL-3.0
Open source minimalist task management tool with AI companion that filters noise, automates coordination, and guides teams through complexity with calm focus.
Open Source Alternative to:
Bridge internal workflows with public collaboration
Stars
21Last commit
24 hours agoLicense
Unknown
Source-available project management platform with dual views - internal team workspace and public portal for user feedback, voting, and progress tracking.
Open Source Alternative to:
Complete website health monitoring and security scanning
Stars
15Last commit
3 months agoLicense
Unknown
Monitor website uptime, detect security vulnerabilities, find broken links, and simulate user flows. Get instant alerts when issues arise. Free tier available.
Open Source Alternative to:
Ask once, get answers across every document
Stars
13Last commit
2 months agoLicense
AGPL-3.0
Upload files, ask questions, and get AI‑backed answers with citations. Compare, synthesize, and export results for teams and polished outputs.
Open Source Alternative to:
Automatically discover hidden subscriptions from your inbox
Stars
10Last commit
21 hours agoLicense
AGPL-3.0
Free subscription tracker that automatically scans your email to find recurring charges. Privacy-focused discovery with complete spending overview and management tools.
Open Source Alternative to:
LLM observability: cost, latency, and traces in one place
Stars
12Last commit
5 days agoLicense
MIT
Drop-in observability platform for OpenAI, Anthropic, and Gemini that logs every request, tracks costs, traces agent workflows, and flags anomalies and PII.
Open Source Alternative to:
No-code platform to build AI agents and automate support
Stars
14Last commit
19 hours agoLicense
MIT
Build AI chatbots, automate customer support workflows, and connect live agents across web, WhatsApp, email, and voice with a no-code visual designer.
Open Source Alternative to:
Trace, evaluate, and protect every LLM call in one SDK
Stars
7Last commit
3 days agoLicense
AGPL-3.0
An AI gateway that sits on the request path to handle PII redaction, prompt injection blocking, tracing, evals, and cost tracking for OpenAI, Anthropic, and Gemini.
Open Source Alternative to:
Secure AI API management for iOS apps with DeviceCheck
Stars
8Last commit
8 months agoLicense
AGPL-3.0
A secure proxy service that protects AI API keys using Apple DeviceCheck, enabling safe integration of ChatGPT, Claude, and other AI models in iOS apps
Own your hiring data with unlimited seats forever
Stars
0Last commit
9 days agoLicense
AGPL-3.0
Self-hosted open-source ATS with no per-seat pricing. Full data ownership, modern tech stack, and complete control over your recruitment process.
Open Source Alternative to:
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Sent – Messaging Infrastructure for Developers. One API for SMS, WhatsApp, and RCS across 190+ countries.
Sent
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