7 Open Source Tools That Replace Expensive SaaS (I Use These Daily)

7 Open Source Tools That Replace Expensive SaaS (I Use These Daily) SaaS subscriptions add up fast. A CRM here, a project manager there, an email tool, an analytics suite — suddenly you are paying €500+/month just to run a small business. Here are 7 open source alternatives I actually use. They are free, self-hostable (if you want), and genuinely good. 1. Notion Alternative → AppFlowy What it replaces: Notion ($16/month) AppFlowy is an open-source Notion alternative built with Flutter and Rust. It works offline, stores data locally by default, and has no vendor lock-in. Best for: developers, privacy-conscious users, people who hate subscription creep. Setup: download from appflowy.io — 5 minutes. 2. Google Analytics Alternative → Plausible / Umami What it replaces: Google Analytics (free but invasive), premium analytics ($50-200/month) Umami is a clean, privacy-focused analytics tool you can self-host on a free Vercel/Railway instance. Features: page views, unique visitors, referrers,