# cti-python-stix2 vs Filigran OpenCTI: side-by-side comparison (2026)

[cti-python-stix2](https://cybersectools.com/tools/cti-python-stix2) is a free [threat intel platforms](https://cybersectools.com/categories/tip) solution. [Filigran OpenCTI](https://cybersectools.com/tools/filigran-opencti) is a commercial [threat intel platforms](https://cybersectools.com/categories/tip) solution by [Filigran](https://cybersectools.com/companies/filigran). Features, integrations, deployment and the company behind each one, side by side.

Need the answer fast? [Best Threat Intelligence Platform Solutions for Business](https://cybersectools.com/shortlists/best-threat-intelligence-platforms) picks Recorded Future Threat Intelligence, Google Threat Intelligence, CrowdStrike Falcon Adversary Intelligence and 4 more.

## Side-by-side comparison

| | cti-python-stix2 | Filigran OpenCTI |
|---|---|---|
| Pricing model | Free | Commercial |
| Category | Threat Intel Platforms | Threat Intel Platforms |
| Verified | No | No |
| Deployment type | On-Premises | Hybrid |
| Company size fit | Startup, SMB, Mid-Market, Enterprise | SMB, Mid-Market, Enterprise |
| GitHub stars | 398 | – |
| Last commit | Apr 2025 | – |
| Company | – | Filigran |
| Headquarters | – | – |

### Use cases and capabilities

| | cti-python-stix2 | Filigran OpenCTI |
|---|---|---|
| STIX | Yes | Yes |
| Case Management | – | Yes |
| MITRE ATT&CK | – | Yes |
| Open Source | – | Yes |
| RBAC | – | Yes |
| Cyber Threat Intelligence | – | Yes |

### Core features

**cti-python-stix2**

No features listed.

**Filigran OpenCTI**

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

## Which one fits you

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

- [cti-python-stix2](https://cybersectools.com/tools/cti-python-stix2) fits if you need to run it on your own servers, you are a startup, you need a free product and you want an open-source product.
- [Filigran OpenCTI](https://cybersectools.com/tools/filigran-opencti) fits if you need both cloud and on-premises options.

## cti-python-stix2 vs Filigran OpenCTI FAQ

Common questions when comparing cti-python-stix2 vs Filigran OpenCTI for threat intel platforms.

### What is the difference between cti-python-stix2 and Filigran OpenCTI?

**cti-python-stix2**: Python APIs for serializing and de-serializing STIX2 JSON content with higher-level APIs for common tasks.

**Filigran OpenCTI**: Open-source threat intelligence platform for organizing and operationalizing CTI, built by Filigran.

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

### Who makes cti-python-stix2 and Filigran OpenCTI?

**cti-python-stix2** is open-source with 398 GitHub stars. **Filigran OpenCTI** is made by Filigran. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.

### Is cti-python-stix2 a good alternative to Filigran OpenCTI?

Often, yes. cti-python-stix2 and Filigran OpenCTI are both Threat Intel Platforms products, and both cover STIX. Key differences: cti-python-stix2 is Free while Filigran OpenCTI is Commercial, cti-python-stix2 is open-source. Use the table above to see where features, deployment and company size fit differ.

## Related comparisons

- [cti-python-stix2 vs EclecticIQ Intelligence Center](https://cybersectools.com/compare/cti-python-stix2-vs-eclecticiq-intelligence-center)
- [cti-python-stix2 vs ThreatBook Advanced Threat Intelligence (ATI)](https://cybersectools.com/compare/cti-python-stix2-vs-threatbook-advanced-threat-intelligence-ati)
- [cti-python-stix2 vs Group-IB Threat Intelligence Platform](https://cybersectools.com/compare/cti-python-stix2-vs-group-ib-threat-intelligence-platform)
- [Filigran OpenCTI vs EclecticIQ Intelligence Center](https://cybersectools.com/compare/eclecticiq-intelligence-center-vs-filigran-opencti)
- [Filigran OpenCTI vs ThreatBook Advanced Threat Intelligence (ATI)](https://cybersectools.com/compare/filigran-opencti-vs-threatbook-advanced-threat-intelligence-ati)
- [Filigran OpenCTI vs Group-IB Threat Intelligence Platform](https://cybersectools.com/compare/filigran-opencti-vs-group-ib-threat-intelligence-platform)

## Alternatives to each

- [See all cti-python-stix2 alternatives](https://cybersectools.com/alternatives/cti-python-stix2)
- [See all Filigran OpenCTI alternatives](https://cybersectools.com/alternatives/filigran-opencti)

---

Source: https://cybersectools.com/compare/cti-python-stix2-vs-filigran-opencti

For AI agents: each product above has its own Markdown page (add .md to its URL, for example https://cybersectools.com/tools/cti-python-stix2.md). Every CybersecTools shortlist is listed at https://cybersectools.com/shortlists.md.

More on cti-python-stix2 and Filigran OpenCTI: 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