HAProxy
Depends
Confidence: Medium
A buy for engineering teams running serious traffic who are comfortable with config files and patching.
Comparison
HAProxy vs Last9
HAProxy and Last9 both land on Depends.
Last9
Depends
Confidence: Medium
Buy if you're an engineering team consolidating metrics, logs, and traces while escaping Datadog-class bills.
| Compare | HAProxy | Last9 |
|---|---|---|
| Verdict | Depends | Depends |
| Best for | High-traffic web infrastructure | High-cardinality telemetry at scale |
| Who it's not for | Non-technical teams wanting a dashboard | Small projects one dashboard covers |
| Privacy | Mature, actively patched open-source project; several CVEs disclosed 2023-2024, including one critical (CVSS 9.1, patched).⁸ | SOC 2 Type 2 certified; no known public vulnerabilities found in the sources reviewed. |
| Support quality | No support evidence in reviewed sources | AWS listing cites hands-on customer engineering support |
| Public sentiment | Comparisons and guides consistently describe HAProxy as fast, stable and highly configurable, but aimed at hands-on operators rather than beginners.⁴ | Users praise reliability, actionable reliability metrics, and consolidating multiple observability tools into one.12 |
| Biggest gotcha | Multiple HTTP request-smuggling CVEs disclosed 2023-2024; patch promptly⁹ | Event-based bills scale with telemetry volume; noisy services inflate costs unpredictably |
Pick HAProxy when
- High-traffic web infrastructure
- Teams with in-house ops skills
- TCP and database load balancing
- Cost-sensitive scaling
When HAProxy is not a fit
- Non-technical teams wanting a dashboard
- Anyone wanting a fully managed cloud LB
- Small sites with one server . use your host's balancer
- Teams that won't track security patches
Pick Last9 when
- High-cardinality telemetry at scale
- Cost-pained Datadog refugees
- OTel-native microservices teams
- SRE/platform teams consolidating tools
When Last9 is not a fit
- Small projects one dashboard covers
- Teams needing predictable per-node bills
- Buyers demanding fully published pricing
- Non-engineering teams without SRE staff
Sources
- HAProxy official sitehaproxy.orgofficial
- HAProxy Load Balancer Configuration Basicshaproxy.comofficial
- What Is HAProxy? A Practical Guide to L4/L7 Load Balancinglogicmonitor.comreview
review
- 11 Top Load Balancers for 2026xurrent.comreview
review
- How to Use HAProxy for Load Balancingakamai.comreview
- CVE-2023-25725: CRITICAL (CVSS 9.1) · Patchedechelongraph.iosecurity
security
- HAProxy, powering today's applications . High Scalabilityhighscalability.comnews
review
- Last9 on AWS Marketplace with reviewsaws.amazon.comreview
- Last9 Customer Reviews & Referencesfeaturedcustomers.comreview
review
- Last9 Pricing and Review 2026 (CubeAPM)cubeapm.comreview
review
