Expel
7.5/10
MSP Compared score
- Starting price
- Custom quote
- Reviews
- 4.7/5 (~90 G2 reviews)
- Free trial
- —
- Deployment
- Cloud
- Best for
- Mid-market/enterprise wanting transparent MDR across their existing tools
Best MDR / XDR Software · 2026
Expel vs 
UnderDefense Expel vs UnderDefense: on our data-weighted scoring, UnderDefense edges ahead (8.1 vs 7.5/10). Expel starts at Custom quote and is best for mid-market/enterprise wanting transparent MDR across their existing tools; UnderDefense starts at $11/endpoint/mo and is best for teams that want an agentic AI SOC on top of the SIEM or XDR they already run. Choose UnderDefense for the stronger overall track record; consider Expel if its pricing model or fit matches your environment better. Side-by-side table below.
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UnderDefense
8.1/10
MSP Compared score
- Starting price
- $11/endpoint/mo
- Reviews
- 4.9/5 (~29 G2 reviews)
- 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
Strengths at a glance
Six criteria, each scored 0–10 on the same scale from real review data, public pricing and feature coverage. See our methodology →
| Criterion | Expel | UnderDefense |
|---|---|---|
| Editorial | 7.5 | 8.1 |
| User reviews | 9.4 | 9.8 |
| Adoption | 5.2 | 3.9 |
| Affordability | 5.0 | 4.1 |
| Feature breadth | 4.0 | 6.0 |
| Ease of trial | 3.0 | 6.0 |
Expel vs UnderDefense: head-to-head
| Expel | UnderDefense | |
|---|---|---|
| Starting price | Custom quote | $11/endpoint/mo |
| Pricing model | quote | per endpoint |
| Free trial / tier | — | 14 days |
| Best for | Mid-market/enterprise wanting transparent MDR across their existing tools | Teams that want an agentic AI SOC on top of the SIEM or XDR they already run |
| Deployment | Cloud | Cloud + on-prem |
| G2 rating | 4.7/5 (90) | 4.9/5 (29) |
| Capterra rating | — | — |
| Our score | 7.5 | 8.1 |
Choose Expel if…
You need mid-market/enterprise wanting transparent mdr across their existing tools.
✓ Pros
- Vendor-agnostic
- Transparent investigations
- Strong cloud coverage
✕ Cons
- Premium pricing
- Quote-only
- Enterprise focus
Choose UnderDefense if…
You need teams that want an agentic ai soc on top of the siem or xdr they already run.
✓ 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
In depth
Pricing: UnderDefense vs Expel
UnderDefense bills on a per endpoint model from $11/endpoint/mo (14 days trial), while Expel uses a quote model from Custom quote. Because the models differ, the cheaper option flips depending on your fleet size — model both at your seat/endpoint count.
Features & deployment
UnderDefense ships 6 headline capabilities (Agentic AI SOC overlay, Vendor-agnostic SIEM/XDR connectors, 24/7 concierge analysts, Co-managed SIEM) and deploys Cloud + on-prem. Expel ships 4 (MDR across cloud + endpoint + SIEM, Transparent workbench, Automation, Clear remediation steps), deploying Cloud.
Ratings & verdict
UnderDefense holds 4.9/5 (~29 G2 reviews); Expel holds 4.7/5 (~90 G2 reviews). On our data-weighted score, UnderDefense edges ahead (8.1 vs 7.5/10). Pick Expel instead when mid-market/enterprise wanting transparent mdr across their existing tools. See UnderDefense alternatives or Expel alternatives.
Frequently asked questions
- Expel vs UnderDefense: which is better?
- Expel vs UnderDefense: on our data-weighted scoring, UnderDefense edges ahead (8.1 vs 7.5/10). Expel starts at Custom quote and is best for mid-market/enterprise wanting transparent MDR across their existing tools; UnderDefense starts at $11/endpoint/mo and is best for teams that want an agentic AI SOC on top of the SIEM or XDR they already run.
- Is Expel cheaper than UnderDefense?
- Expel starts at Custom quote and UnderDefense starts at $11/endpoint/mo (see the pricing rows for models and limits).
Data as of November 1, 2026. Sources: expel.com, underdefense.com. Figures are pulled from public vendor and security data and refreshed automatically.