The €500 Micro-SaaS: What You Can Actually Build for That Price
Real examples of functional software built for €500. Setting proper expectations for micro-SaaS budgets based on 50+ delivered projects.
Every week, someone asks: "What can you actually build for €500?" The answer is more than you'd think — and less than most agencies promise.
Example 1: Cookie Consent Widget
Client: E-commerce shop, 10K monthly visitors
Problem: GDPR compliance, existing tools too expensive
Budget: €500
Built:
- Lightweight consent banner (< 15KB)
- Cookie categorization (necessary, analytics, marketing)
- User preference storage + GTM integration
- Simple admin panel for text and colors
Didn't build: Multi-language, analytics, A/B testing, auto-scanning
Time: 18 hours · Result: Running for 2 years. Never needed the missing features.
Example 2: Inventory Alert System
Client: Shopify retailer
Problem: Kept running out of popular items
Budget: €500
Built:
- Shopify API integration, polling every 6 hours
- Low-stock thresholds per product
- Email alerts + weekly summary
- Simple stock dashboard
Didn't build: Auto-reordering, supplier integration, demand forecasting, mobile app
Time: 15 hours · Result: Saves 3-4 stockouts/month. At their AOV, that's €800-1,200 in recovered sales monthly.
Example 3: Booking Form with Calendar
Client: Freelance consultant
Problem: Endless scheduling emails
Budget: €500
Built:
- Embeddable booking widget
- Google Calendar two-way sync
- Available slot detection
- Confirmation + reminder emails
Didn't build: Payments, team scheduling, SMS, custom branding beyond colors
Time: 20 hours (Calendar APIs are always harder than you think) · Result: Saves 2 hours/week. At €150/hour consulting rate, payback in 10 days.
The Pattern
- Narrow scope. One core problem solved well.
- No nice-to-haves. Every feature directly serves the main use case.
- Clear ROI. Client can point to saved time or recovered revenue.
- Simple tech. No frameworks-of-the-week.
What €500 Can't Do
- User auth — login flows alone can eat half the budget
- Payments — Stripe integration = easily €1,000+
- Mobile app — basic React Native starts at €2,000+
- Multi-tenant SaaS — fundamentally different architecture
- Real-time features — WebSockets, live chat = complex
If anyone promises a full SaaS with auth, payments, and mobile for €500, they're lying.
When to Spend More
€500 is for: validating ideas, automating one workflow, building internal tools, simple lead-gen tools.
€2,000-5,000 when: you need user accounts, payment processing, multi-user collaboration, or scaling past a few hundred users.
The Real Question
Most businesses don't need a €50,000 platform. They need a €500 tool that solves one specific problem really well. The spreadsheet that should be an app. The manual process that eats 2 hours daily.
Start there. Prove it works. Then invest more.
Got a process eating your time? I build micro-SaaS tools that fix exactly that. Let's talk about what €500 can do for you.
