# NotifySecurity vs PhishingBox KillPhish: side-by-side comparison (2026)

[NotifySecurity](https://cybersectools.com/tools/notifysecurity) is a free [Anti-Phishing](https://cybersectools.com/categories/anti-phishing) solution. [PhishingBox KillPhish](https://cybersectools.com/tools/phishingbox-killphish) is a commercial [Anti-Phishing](https://cybersectools.com/categories/anti-phishing) solution by [PhishingBox](https://cybersectools.com/companies/phishingbox). Features, integrations, deployment and the company behind each one, side by side.

## Side-by-side comparison

| | NotifySecurity | PhishingBox KillPhish |
|---|---|---|
| Pricing model | Free | Commercial |
| Category | Anti-Phishing | Anti-Phishing |
| Verified | No | No |
| Deployment type | Cloud | Cloud |
| Company size fit | SMB, Mid-Market, Enterprise | Startup, SMB, Mid-Market, Enterprise |
| GitHub stars | 133 | – |
| Last commit | Nov 2018 | – |
| Company | – | PhishingBox |
| Headquarters | – | – |

### Use cases and capabilities

| | NotifySecurity | PhishingBox KillPhish |
|---|---|---|
| Outlook | Yes | – |
| SMTP | Yes | – |
| Microsoft 365 | – | Yes |

### Core features

**NotifySecurity**

No features listed.

**PhishingBox KillPhish**

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

### Integrations

**NotifySecurity**

No integrations listed.

**PhishingBox KillPhish**

4 integrations 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.

- [NotifySecurity](https://cybersectools.com/tools/notifysecurity) fits if you need a free product and you want an open-source product.
- [PhishingBox KillPhish](https://cybersectools.com/tools/phishingbox-killphish) fits if you are a startup.

## NotifySecurity vs PhishingBox KillPhish FAQ

Common questions when comparing NotifySecurity vs PhishingBox KillPhish for Anti-Phishing.

### What is the difference between NotifySecurity and PhishingBox KillPhish?

**NotifySecurity**: An Outlook add-in that enables one-click reporting of suspicious emails to security teams with integrated statistics tracking and SMTP header collection.

**PhishingBox KillPhish**: Email threat scanning and reporting add-in for Microsoft 365 and Google, built by PhishingBox.

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

### Who makes NotifySecurity and PhishingBox KillPhish?

**NotifySecurity** is open-source with 133 GitHub stars. **PhishingBox KillPhish** is made by PhishingBox. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.

### Is NotifySecurity a good alternative to PhishingBox KillPhish?

Often, yes. NotifySecurity and PhishingBox KillPhish are both Anti-Phishing products. Key differences: NotifySecurity is Free while PhishingBox KillPhish is Commercial, NotifySecurity is open-source. Use the table above to see where features, deployment and company size fit differ.

## Related comparisons

- [NotifySecurity vs Vade for M365](https://cybersectools.com/compare/notifysecurity-vs-vade-for-m365)
- [NotifySecurity vs Egress Defend](https://cybersectools.com/compare/egress-defend-vs-notifysecurity)
- [NotifySecurity vs GreatHorn Mailbox Intelligence](https://cybersectools.com/compare/greathorn-mailbox-intelligence-vs-notifysecurity)
- [PhishingBox KillPhish vs Vade for M365](https://cybersectools.com/compare/phishingbox-killphish-vs-vade-for-m365)
- [PhishingBox KillPhish vs Egress Defend](https://cybersectools.com/compare/egress-defend-vs-phishingbox-killphish)
- [PhishingBox KillPhish vs GreatHorn Mailbox Intelligence](https://cybersectools.com/compare/greathorn-mailbox-intelligence-vs-phishingbox-killphish)

## Alternatives to each

- [See all NotifySecurity alternatives](https://cybersectools.com/alternatives/notifysecurity)
- [See all PhishingBox KillPhish alternatives](https://cybersectools.com/alternatives/phishingbox-killphish)

---

Source: https://cybersectools.com/compare/notifysecurity-vs-phishingbox-killphish

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

More on NotifySecurity and PhishingBox KillPhish: 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