OutSystems vs ILLA Builder: Which Should You Choose in 2026?
Choosing between OutSystems and ILLA Builder comes down to understanding what each tool does best. This comparison breaks down the key differences so you can make an informed decision based on your specific needs, not marketing claims.
By Toolradar Team · Last updated February 28, 2026 · Methodology
Short on time? Here's the quick answer
We've tested both tools. Here's who should pick what:
OutSystems
Enterprise low-code application platform
Best for you if:
- • You want the higher-rated option (8.4/10 vs 7.7/10)
- • OutSystems is a low-code platform for enterprise application development
- • It enables rapid development with visual modeling and one-click deployment
ILLA Builder
Open-source low-code platform
Best for you if:
- • You want to try before committing
- • Open-source low-code platform
- • Build apps with drag-and-drop interface
| At a Glance |  OutSystems | |
|---|---|---|
Price | Paid | Free + Paid |
Best For | Low-Code Backend | Low-Code Backend |
Rating | 84/100 | 77/100 |
| Feature | OutSystems | ILLA Builder |
|---|---|---|
| Pricing Model | Paid | Freemium |
| Editorial Score | 84 | 77 |
| Community Rating | No ratings yet | No ratings yet |
| Total Reviews | 0 | 0 |
| Community Upvotes | 0 | 0 |
| Categories | Low-Code BackendAutomation | Low-Code BackendApp Builders |
How OutSystems and ILLA Builder Compare
OutSystems
Enterprise low-code application platform
Paid · 84/100 score
ILLA Builder
Open-source low-code platform
Free tier available · 77/100 score
Who Should Use What?
On a budget?
ILLA Builder has a free tier. OutSystems is paid only.
Go with: ILLA Builder
Want the highest-rated option?
OutSystems: 84/100. ILLA Builder: 77/100.
Go with: OutSystems
Value user reviews?
Neither has user reviews yet.
Go with: OutSystems
3 Questions to Help You Decide
What's your budget?
OutSystems is paid. ILLA Builder is freemium. ILLA Builder lets you start free.
What's your use case?
Both are low-code backend tools. Compare their specific features to decide.
How important are ratings?
OutSystems scores higher: 84/100 vs 77/100.
Key Takeaways
OutSystems
- Higher score: 84/100 vs 77
- Our pick for this comparison
ILLA Builder
- Has a free tier
The Bottom Line
OutSystems (84/100) is our pick. ILLA Builder has a free tier if you want to test without paying.
Frequently Asked Questions
Is OutSystems or ILLA Builder better?
OutSystems scores 84/100 in our evaluation. OutSystems is paid and ILLA Builder is freemium.
What are OutSystems and ILLA Builder used for?
OutSystems: Enterprise low-code application platform. ILLA Builder: Open-source low-code platform.
What does OutSystems cost vs ILLA Builder?
OutSystems is a paid tool. ILLA Builder is freemium (free tier + paid plans). Visit their websites for detailed pricing.