# ACI Learning Skill Labs vs SentinelTestbed: side-by-side comparison (2026)

[ACI Learning Skill Labs](https://cybersectools.com/tools/aci-learning-skill-labs) is a commercial [cyber range training](https://cybersectools.com/categories/cyber-range) solution by [ACI Learning](https://cybersectools.com/companies/aci-learning). [SentinelTestbed](https://cybersectools.com/tools/sentineltestbed) is a free [cyber range training](https://cybersectools.com/categories/cyber-range) solution. Features, integrations, deployment and the company behind each one, side by side.

## Side-by-side comparison

| | ACI Learning Skill Labs | SentinelTestbed |
|---|---|---|
| Pricing model | Commercial | Free |
| Category | Cyber Range Training | Cyber Range Training |
| Verified | No | No |
| Deployment type | Cloud | On-Premises |
| Company size fit | Startup, SMB, Mid-Market, Enterprise | Startup, SMB, Mid-Market |
| GitHub stars | – | 11 |
| Last commit | – | Nov 2016 |
| Company | ACI Learning | – |
| Headquarters | – | – |

### Use cases and capabilities

| | ACI Learning Skill Labs | SentinelTestbed |
|---|---|---|
| Lab | Yes | – |
| Online Learning | Yes | – |
| Cyber Range | Yes | – |
| Education | Yes | – |
| PHP | – | Yes |
| SQLite | – | Yes |
| Vulnerable Applications | – | Yes |

### Core features

**ACI Learning Skill Labs**

8 features listed. Sign in on the page to see them.

**SentinelTestbed**

No features listed.

## Which one fits you

Based on what each listing shows: deployment, company size, price and open source.

- [ACI Learning Skill Labs](https://cybersectools.com/tools/aci-learning-skill-labs) fits if you want a cloud product and you are an enterprise.
- [SentinelTestbed](https://cybersectools.com/tools/sentineltestbed) fits if you need to run it on your own servers, you need a free product and you want an open-source product.

## ACI Learning Skill Labs vs SentinelTestbed FAQ

Common questions when comparing ACI Learning Skill Labs vs SentinelTestbed for cyber range training.

### What is the difference between ACI Learning Skill Labs and SentinelTestbed?

**ACI Learning Skill Labs**: Virtual hands-on IT & cybersecurity lab platform for academic programs, built by ACI Learning.

**SentinelTestbed**: A vulnerable web site for testing Sentinel features.

The table above shows where their features, integrations, deployment and company size fit differ.

### Who makes ACI Learning Skill Labs and SentinelTestbed?

**ACI Learning Skill Labs** is made by ACI Learning. **SentinelTestbed** is open-source with 11 GitHub stars. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.

### Is ACI Learning Skill Labs a good alternative to SentinelTestbed?

Often, yes. ACI Learning Skill Labs and SentinelTestbed are both Cyber Range Training products. Key differences: ACI Learning Skill Labs is Commercial while SentinelTestbed is Free, SentinelTestbed is open-source. Use the table above to see where features, deployment and company size fit differ.

## Related comparisons

- [ACI Learning Skill Labs vs GemForge Labs](https://cybersectools.com/compare/aci-learning-skill-labs-vs-gemforge-labs)
- [ACI Learning Skill Labs vs OffSec Proving Grounds](https://cybersectools.com/compare/aci-learning-skill-labs-vs-offsec-proving-grounds)
- [ACI Learning Skill Labs vs CybergymIEC Cyber Arena](https://cybersectools.com/compare/aci-learning-skill-labs-vs-cybergymiec-cyber-arena)
- [SentinelTestbed vs GemForge Labs](https://cybersectools.com/compare/gemforge-labs-vs-sentineltestbed)
- [SentinelTestbed vs OffSec Proving Grounds](https://cybersectools.com/compare/offsec-proving-grounds-vs-sentineltestbed)
- [SentinelTestbed vs CybergymIEC Cyber Arena](https://cybersectools.com/compare/cybergymiec-cyber-arena-vs-sentineltestbed)

## Alternatives to each

- [See all ACI Learning Skill Labs alternatives](https://cybersectools.com/alternatives/aci-learning-skill-labs)
- [See all SentinelTestbed alternatives](https://cybersectools.com/alternatives/sentineltestbed)

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Source: https://cybersectools.com/compare/aci-learning-skill-labs-vs-sentineltestbed

For AI agents: each product above has its own Markdown page (add .md to its URL, for example https://cybersectools.com/tools/aci-learning-skill-labs.md). Every CybersecTools shortlist is listed at https://cybersectools.com/shortlists.md.

More on ACI Learning Skill Labs and SentinelTestbed: funding, momentum, hiring and news, plus the full product and company record, are available through the Mandos MCP Server (paid plans), which connects to AI assistants: https://mandos.io/mcp?utm_source=cybersectools.com&utm_medium=compare-md