UnderDefense Review (2026)
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- Starting price
- $11/endpoint/mo
- Free trial
- 14 days
- Deployment
- Cloud + on-prem
- Best for
- Teams that want an agentic AI SOC on top of the SIEM or XDR they already run
Our verdict
UnderDefense earns 8.1/10 in our review, weighted from 4.9/5 (~29 G2 reviews) and its feature/pricing profile. Vendor-agnostic AI SOC that sits on your existing stack, with a published $11/endpoint starting price. Best for teams that want an agentic AI SOC on top of the SIEM or XDR they already run. Starting price: $11/endpoint/mo.
Backed by 4.9★ · 29 reviews on G2.
Pros & cons
✓ Pros
- Published per-endpoint floor (rare in this category)
- Runs on the SIEM/XDR you already own
- 14-day trial
✕ Cons
- G2 volume still small vs Huntress or Arctic Wolf
- Higher tiers are contact-sales
- Annual contracts
Key features
- Agentic AI SOC overlay
- Vendor-agnostic SIEM/XDR connectors
- 24/7 concierge analysts
- Co-managed SIEM
- ChatOps via Slack/Teams
- Incident response retainer
How UnderDefense compares
| UnderDefense | Huntress | Arctic Wolf | |
|---|---|---|---|
| Starting price | $11/endpoint/mo | Custom quote | Custom quote |
| Pricing model | per endpoint | per endpoint | quote |
| Free trial / tier | 14 days | Free trial | — |
| Best for | Teams that want an agentic AI SOC on top of the SIEM or XDR they already run | MSPs and SMBs wanting affordable managed detection with a real human SOC | Mid-market orgs wanting a named concierge security team |
| Deployment | Cloud + on-prem | Cloud | Cloud |
| G2 rating | 4.9/5 (29) | 4.9/5 (700) | 4.7/5 (250) |
| Capterra rating | — | — | — |
| Our score | 8.1 | 8.6 | 7.8 |
Affiliate disclosure: Some links may be affiliate or partner links. If you sign up through one, we may earn a commission at no extra cost to you. This never changes our scores or rankings. Learn more.
Full review
UnderDefense Review
Our Score: 8.1/10 · Verdict: A vendor-agnostic AI SOC that layers onto the stack you already run — and, unusually for this category, it tells you what it costs.
UnderDefense pitches itself as an agentic AI SOC overlay for teams that don’t want to rip and replace their SIEM or XDR. If you’ve already sunk budget into a detection platform but lack the 24/7 humans (and now, apparently, agents) to run it, this is the pitch aimed squarely at you.
Ratings
| Source | Score | Reviews |
|---|---|---|
| G2 | 4.9 / 5 | 29 |
A 4.9 is excellent — but note the 29-review sample. That’s a thin base compared to established MDR players, so treat it as promising rather than proven. Small samples flatter easily.
Pricing
| Tier | Price | Notes |
|---|---|---|
| Published floor | $11 / endpoint/mo | Indicative; 14-day trial for orgs up to ~100 employees |
| Standard | Contact sales | EDR 24/7 |
| Enhanced | Contact sales | Cloud, SaaS & email detection/response |
| Professional | Contact sales | Managed SIEM & XDR |
- Model: per-endpoint, USD, annual contracts
- Free trial: 14 days · Free tier: none
- As of 2026-09
Credit where due: publishing an $11/device/month floor is genuinely rare in MDR, where most vendors hide everything behind a sales call. That said, the transparency is partial — it’s an indicative starting number that may exclude add-ons, and every meaningful tier (Standard, Enhanced, Professional) is still contact-sales. So you get a teaser, not a full price list.
Features
- Agentic AI SOC overlay
- Vendor-agnostic SIEM/XDR connectors
- 24/7 concierge analysts
- Co-managed SIEM
- ChatOps via Slack/Teams
- Incident response retainer
The vendor-agnostic connectors are the real differentiator here. Most MDR forces you into their preferred telemetry pipeline; UnderDefense claims to sit on what you own. The 24/7 human analysts plus IR retainer round out a legitimate managed offering — this isn’t just a dashboard.
Pros & Cons
| 👍 Pros | 👎 Cons |
|---|---|
| Published per-endpoint floor (rare) | Small G2 volume vs Huntress / Arctic Wolf |
| Runs on your existing SIEM/XDR | Higher tiers are contact-sales |
| 14-day trial | Annual contracts only |
Bottom Line
UnderDefense is a smart fit for a specific buyer: a team that already owns a SIEM or XDR, needs 24/7 coverage, and wants an AI-assisted SOC without a platform migration. The published floor and vendor-agnostic design are its strongest cards.
The reservations are about maturity and lock-in, not capability — the thin review base means you’re taking a modest leap of faith, and annual contracts mean you’re committing before you’ve fully validated it. Use the 14-day trial aggressively before signing, and push hard for real numbers on the Enhanced/Professional tiers you’ll actually need.
Best for: Teams that want an agentic AI SOC on top of the SIEM or XDR they already run.
Frequently asked questions
- Is UnderDefense worth it?
- UnderDefense earns 8.1/10 in our review, weighted from 4.9/5 (~29 G2 reviews) and its feature/pricing profile. Vendor-agnostic AI SOC that sits on your existing stack, with a published $11/endpoint starting price. Best for teams that want an agentic AI SOC on top of the SIEM or XDR they already run. Starting price: $11/endpoint/mo.
- What does UnderDefense cost?
- From $11/endpoint/mo — see the pricing page.
Based on aggregated third-party ratings (4.9/5 (~29 G2 reviews)) and UnderDefense's published feature and pricing data. Hands-on testing notes reflect the test date shown above. See how we test.