Open Source

Gumroad

MIT

A digital marketplace platform where creators can sell digital products, from courses to software, with built-in payment processing and content delivery.

Hyperswitch

Apache-2.0

A unified payment infrastructure that connects multiple payment processors through a single API integration, enabling global payment processing

Invoice Ninja

Unknown

Free invoicing software for freelancers and small businesses. Create professional invoices, track expenses, accept online payments, and manage projects without hidden fees.

Kimai

AGPL-3.0

Open-source time tracking solution for businesses of all sizes. Manage projects, track billable hours, and generate insightful reports.

Lago

AGPL-3.0

Open-source billing system that handles metering, usage-based pricing, and invoicing at scale. Perfect for AI, cloud, and API companies needing flexible monetization.

Meteroid

AGPL-3.0

Open-source pricing and billing platform that helps SaaS companies launch, test, and scale complex billing models with ease. Features metering, invoicing, and real-time data.

Midday

AGPL-3.0

All-in-one tool for freelancers and small businesses to manage finances, track time, store files, and send invoices efficiently.

Paymenter

MIT

Automate subscriptions and manage payments with a flexible, open-source billing system designed specifically for hosting providers.

Polar

Apache-2.0

Comprehensive payment solution with built-in tax handling, automated benefits, and seamless integrations for digital product and SaaS businesses.

Spliit

MIT

A user-friendly app for tracking shared expenses, settling debts, and managing group finances with ease and transparency.

Suprascribe

Unknown

Free subscription tracker that automatically scans your email to find recurring charges. Privacy-focused discovery with complete spending overview and management tools.

UniBee

AGPL-3.0

Replace expensive billing solutions with open-source software. Automate subscriptions, accept multiple payments including crypto, and gain real-time revenue insights.

Horilla

LGPL-2.1

Horilla is a free, open-source HRMS that streamlines HR processes, from recruitment to offboarding, with customizable modules.

Reqcore

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.

Novu

Unknown

Open-source platform for building in-app, email, push, SMS, and chat notifications with a unified API, workflow engine, and embeddable inbox component.

Postiz

AGPL-3.0

Open-source social media scheduling tool that plans, generates, and publishes posts across 30+ networks with AI assistance, analytics, and team collaboration.

Brace.to

MIT

A privacy-focused bookmark manager that encrypts your saved links, allowing you to access them anytime, anywhere, on any device with complete control.

Chaskiq

Unknown

Versatile messaging solution for businesses to engage customers through multiple channels, with AI-powered automation and analytics.

Contentport

AGPL-3.0

Create, schedule & manage Twitter content at scale with AI assistance, beautiful visuals, and multi-account support. Perfect for busy founders.

Dittofeed

MIT

Dittofeed offers low-code tools for message automation across multiple channels, including powerful segmentation and personalization features.

Dub Links

AGPL-3.0

Link management platform for marketing teams with custom domains, UTM builder, A/B testing, geo-targeting, QR codes, and real-time conversion analytics.

Fonoster

MIT

Build and deploy powerful voice and messaging applications with ease using Fonoster's flexible, scalable, and developer-friendly platform.

Frappe Helpdesk

AGPL-3.0

Frappe Helpdesk consolidates customer issues, automates workflows, and empowers self-service to boost agent productivity and customer satisfaction.

Freescout

AGPL-3.0

Self-hosted email management system with shared inboxes, automation, and powerful collaboration features for efficient customer support.