# Certstream vs Webz.io: side-by-side comparison (2026)

[Certstream](https://cybersectools.com/tools/certstream) is a free [threat intel feeds](https://cybersectools.com/categories/threat-intel-feeds) solution. [Webz.io](https://cybersectools.com/tools/webzio) is a commercial [threat intel feeds](https://cybersectools.com/categories/threat-intel-feeds) solution by [Webz.io](https://cybersectools.com/companies/webzio). Features, integrations, deployment and the company behind each one, side by side.

## Side-by-side comparison

| | Certstream | Webz.io |
|---|---|---|
| Pricing model | Free | Commercial |
| Category | Threat Intel Feeds | Threat Intel Feeds |
| Verified | No | Verified |
| Deployment type | Cloud | Cloud |
| Company size fit | Startup, SMB, Mid-Market, Enterprise | SMB, Mid-Market, Enterprise |
| Company | – | Webz.io |
| Headquarters | – | – |

### Use cases and capabilities

| | Certstream | Webz.io |
|---|---|---|
| SSL | Yes | – |
| Dark Web Monitoring | – | Yes |
| Cyber Threat Intelligence | – | Yes |
| Data Breach | – | Yes |
| Fraud Detection | – | Yes |
| OSINT | – | Yes |

### Core features

**Certstream**

No features listed.

**Webz.io**

- Dark Web API for accessing deep and dark web data
- Data Breach Detection API for identifying exposed credentials and breached data
- Open Web APIs covering news, blogs, forums, and reviews
- Lunar platform for dark web monitoring and incident response
- Account takeover protection via stolen credential tracking
- Brand protection monitoring
- Executive protection monitoring
- Identity theft protection

## Which one fits you

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

- [Certstream](https://cybersectools.com/tools/certstream) fits if you are a startup and you need a free product.

## Certstream vs Webz.io FAQ

Common questions when comparing Certstream vs Webz.io for threat intel feeds.

### What is the difference between Certstream and Webz.io?

**Certstream**: Real-time monitoring tool for newly issued SSL certificates.

**Webz.io**: Web data platform providing open, deep & dark web APIs and monitoring. Built by Webz.io. Core capabilities include Dark Web API for accessing deep and dark web data, Data Breach Detection API for identifying exposed credentials and breached data, Open Web APIs covering news, blogs, forums, and reviews.

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

### Is Certstream a good alternative to Webz.io?

Often, yes. Certstream and Webz.io are both Threat Intel Feeds products. Key differences: Certstream is Free while Webz.io is Commercial. Use the table above to see where features, deployment and company size fit differ.

## Related comparisons

- [Certstream vs Constella Threat Intelligence Data Signals API](https://cybersectools.com/compare/certstream-vs-constella-threat-intelligence-data-signals-api)
- [Certstream vs ZeroFox Threat Intelligence Feeds](https://cybersectools.com/compare/certstream-vs-zerofox-threat-intelligence-feeds)
- [Certstream vs Netacea Threat Intel Center](https://cybersectools.com/compare/certstream-vs-netacea-threat-intel-center)
- [Webz.io vs Constella Threat Intelligence Data Signals API](https://cybersectools.com/compare/constella-threat-intelligence-data-signals-api-vs-webzio)
- [Webz.io vs ZeroFox Threat Intelligence Feeds](https://cybersectools.com/compare/webzio-vs-zerofox-threat-intelligence-feeds)
- [Webz.io vs Netacea Threat Intel Center](https://cybersectools.com/compare/netacea-threat-intel-center-vs-webzio)

## Alternatives to each

- [See all Certstream alternatives](https://cybersectools.com/alternatives/certstream)
- [See all Webz.io alternatives](https://cybersectools.com/alternatives/webzio)

---

Source: https://cybersectools.com/compare/certstream-vs-webzio

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

More on Certstream and Webz.io: 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