OutSystems vs StackAI

Comprehensive side-by-side comparison — features, pricing, performance, and more.

Data last refreshed October 2026

OutSystems

Your AI development platform built for the enterprise.

Freemium

76% verification coverage

StackAI

Stack AI (Eigen Inc.)

AI Agents for the Enterprise

Freemium

75% verification coverage

Trust & Reliability

OutSystems

Users:500K-1M

Customers (per vendor):Honda, HEINEKEN, Thermo Fisher +4

GDPR

SOC 2

HIPAA

StackAI

Uptime:100.0%Status page

Customers (per vendor):BAE Systems, Mayo Clinic, MIT +7

GDPR

SOC 2

HIPAA

Overall Winner: StackAI

6.7/10 vs OutSystems at 4.5/10

Leads in:

Support

Integration

Customization

Scores are AI-estimated from publicly available data — not an independent test or a verified user rating. How we rank →

AI Comparison Summary

OutSystems

4.5

avg score

StackAI

6.7

avg score

StackAI leads overall — particularly in Customization and Support and 1 more.

Based on 6 dimensions

Scores are AI-estimated from publicly available data — not an independent test or a verified user rating. How we rank →

Overall Winner

StackAI

6.7 / 10

OutSystems

Best For

Regulated enterprises modernizing legacy systems

Teams building custom AI applications and agents

Organizations needing enterprise-grade security and governance for AI

Businesses automating complex internal workflows

StackAI

Best For

IT teams orchestrating AI across the enterprise

Organizations with regulated and complex operations

Legal teams redlining contracts and accelerating due diligence

Risk and compliance teams strengthening defense with AI

* Verdict is based on our algorithmic scoring of publicly available data. Learn about our methodology

OutSystems is best for

🎨Image & Design9.0📊Data & Analytics9.0✍️Writing & Content8.0

StackAI is best for

💬Chat & Conversation7.3💻Coding & Dev7.0🤖Automation & Agents7.0

Filter by your use case:

Limitations

OutSystems

Cons

Pricing is custom and requires contacting sales for most tiers.
Compliance options are limited to ISO 27001 on the standard platform, with additional certifications available as add-ons.
Uptime guarantee is 99.5% on the standard platform, with an upgrade to 99.95% available as an add-on.
Application end-users start with 100 internal users, with additional users requiring add-ons.

StackAI

Cons

No cons listed yet.

Weighted Score — Adjust What Matters to You

Pick a profile or drag sliders — scores and radar update instantly on the right.

Quick profiles:

Ease of Use5

Customization5

Support5

Integration5

Compliance & Data Protection5

Performance5

Planning Quality5

Dimension Comparison

OutSystems

4.5

/ 10

StackAI

6.7

/ 10

Clear winner

Dimension Breakdown

Ease of Use

How intuitive is onboarding, UI navigation, and day-to-day usage for the target audience?

OutSystems

3.0

StackAI

3.0

Customization

Calculated

How much can users tailor workflows, settings, prompts, or outputs to their needs?

OutSystems

4.0

StackAI

8.0▲ +4.0

Support

How strong is the documentation, customer support, community, and learning resources?

OutSystems

5.0

StackAI

9.0▲ +4.0

Integration

Calculated

How well does it connect with other tools, APIs, and workflows?

OutSystems

4.0

StackAI

9.0▲ +5.0

Compliance & Data Protection

Calculated

Compliance certifications and data-protection posture, counted from ten verified signals: SOC 2 Type II, GDPR compliance, HIPAA, WCAG AA/AAA, PII redaction, licensed-only training, a published sub-processor list, a downloadable DPA, not training on user data, and a documented deletion path

OutSystems

6.0

StackAI

6.0

Performance

Calculated

Latency + throughput speed

OutSystems

5.0

StackAI

5.0

Planning Quality

Calculated

Multi-step planning depth + replanning capability

OutSystems

—

StackAI

—

Calculated = derived from structured signals (integration count, API/open-source config, compliance certs, response-time). AI = LLM-assessed from public website content. Methodology

Task Performance

OutSystems

Task

StackAI

7.0

Role Definition

7.0

6.0

Task Decomposition

6.0

8.0

Agent Coordination

6.0

Inter Agent Communication

5.0

9.0

Workflow Orchestration

9.0

7.0

Tool Use Delegation

7.0

State Management

6.0

5.0

Error Recovery

6.0

8.0

Observability

8.0

7.0

Scalability Throughput

7.0

Task Delegation

6.0

5.0

Parallel Execution

5.0

* Task scores (1–10) are algorithmically generated from publicly available data.

Data is sourced from public information and vendor websites. It may not always be up-to-date — verify pricing and features directly with the vendor before purchasing.Report inaccuracy

Frequently Asked Questions

What are the main differences between OutSystems and StackAI?

OutSystems — "Your AI development platform built for the enterprise". StackAI — "AI Agents for the Enterprise". The Features section on this page compares them side by side.

Who is OutSystems best for compared with StackAI?

OutSystems is best for Regulated enterprises modernizing legacy systems; and for Teams building custom AI applications and agents. StackAI is best for IT teams orchestrating AI across the enterprise; and for Organizations with regulated and complex operations.

How does the pricing of OutSystems compare with StackAI?

OutSystems is freemium, includes a free plan. StackAI is freemium, includes a free plan. Always verify current pricing with the vendor.

Does OutSystems or StackAI have a free plan?

OutSystems has a free plan. StackAI has a free plan. Always verify current pricing with the vendor.

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