# Best Intrusion Detection and Prevention Systems (IDPS) - Page 6

*By [Lauren Worth](https://research.g2.com/insights/author/lauren-worth)*


Intrusion detection and prevention systems (IDPS) are used to inform IT administrators and security staff of anomalies and attacks on IT infrastructure and applications. These tools detect malware, socially engineered attacks, and other web-based threats. IDPS also provide preemptive intrusion prevention capabilities for internal threats and potentially compromised systems.

Intrusion detection and prevention systems monitor systems for abnormal behavior and potential vulnerabilities that can leave a business susceptible to cyberattacks. Companies choose to adopt these to protect their sensitive business information and ensure their computing infrastructure performs as needed.

Some next-generation [firewall software](https://www.g2.com/categories/firewall) offer intrusion detection and prevention capabilities. But the main functionality of firewall tools will be controlling network access, rather than monitoring network behavior.

To qualify for inclusion in the Intrusion Detection and Prevention Systems (IDPS) category, a product must:

- Monitor IT systems for abnormal behavior and misuse
- Inform administrators of abnormal protocol activity
- Monitor the performance of IT hardware and security components
- Provide blocking mechanisms for web-based threats






## G2 Grid® for Intrusion Detection and Prevention Systems (IDPS)
![G2 Grid® for Intrusion Detection and Prevention Systems (IDPS) plotting products by satisfaction and market presence](https://www.g2.com/categories/intrusion-detection-and-prevention-systems-idps/grids.png?focus%5B%5D=1066&focus%5B%5D=88784&focus%5B%5D=71392&focus%5B%5D=1386549&focus%5B%5D=58203&focus%5B%5D=155622&focus%5B%5D=88524&focus%5B%5D=55529)
Highlighted products: Palo Alto Networks Next-Generation Firewalls, Palo Alto Networks VM-Series Virtual Firewall, Check Point Quantum Intrusion Prevention System (IPS), Cloud-Delivered Security Services, Check Point Infinity Platform, threatER, FortiGate IPS, and TrendAI Vision One - Cloud Security.
Underlying data: [Grid® JSON](https://www.g2.com/categories/intrusion-detection-and-prevention-systems-idps/grids.json?focus%5B%5D=palo-alto-networks-next-generation-firewalls&focus%5B%5D=palo-alto-networks-vm-series-virtual-firewall&focus%5B%5D=check-point-quantum-intrusion-prevention-system-ips&focus%5B%5D=cloud-delivered-security-services&focus%5B%5D=check-point-infinity-platform&focus%5B%5D=threater&focus%5B%5D=fortigate-ips&focus%5B%5D=trendai-vision-one-cloud-security)


## How Many Intrusion Detection and Prevention Systems (IDPS) Products Does G2 Track?
**Total Products under this Category:** 63

### Category Stats (Jul 2026)
- **Average Rating**: 4.4/5 The average rating of products in this category, based on all submitted ratings
- **Top Trending Product**: Darktrace / NETWORK (+0.29%) - Among all products in this category, Darktrace / NETWORK recorded the largest rating increase compared to last month
*Last updated: July 11, 2026*


## How Does G2 Rank Intrusion Detection and Prevention Systems (IDPS) Products?

**Why You Can Trust G2's Software Rankings:**

- 30 Analysts and Data Experts
- 1,700+ Authentic Reviews
- 63+ Products
- Unbiased Rankings

G2's software rankings are built on verified user reviews, rigorous moderation, and a consistent research methodology maintained by a team of analysts and data experts. Each product is measured using the same transparent criteria, with no paid placement or vendor influence. While reviews reflect real user experiences, which can be subjective, they offer valuable insight into how software performs in the hands of professionals. Together, these inputs power the G2 Score, a standardized way to compare tools within every category.


## Which Intrusion Detection and Prevention Systems (IDPS) Is Best for Your Use Case?

- **Leader:** [Palo Alto Networks Next-Generation Firewalls](https://www.g2.com/products/palo-alto-networks-next-generation-firewalls/reviews)
- **Highest Performer:** [threatER](https://www.g2.com/products/threater/reviews)
- **Easiest to Use:** [threatER](https://www.g2.com/products/threater/reviews)
- **Top Trending:** [Palo Alto Networks VM-Series Virtual Firewall](https://www.g2.com/products/palo-alto-networks-vm-series-virtual-firewall/reviews)
- **Best Free Software:** [CrowdSec](https://www.g2.com/products/crowdsec/reviews)


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## What Is Intrusion Detection and Prevention Systems (IDPS)?

[Network Security Software](https://www.g2.com/categories/network-security)

## What Software Categories Are Similar to Intrusion Detection and Prevention Systems (IDPS)?

- [Firewall Software](https://www.g2.com/categories/firewall-software)
- [Network Traffic Analysis (NTA) Software](https://www.g2.com/categories/network-traffic-analysis-nta)
- [Network Detection and Response (NDR) Software](https://www.g2.com/categories/network-detection-and-response-ndr)