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Penetration testing as a service · October 2026 Edition

Astra Security vs UnderDefense

Zero of fourteen models named Astra Security first on the direct prompt; two named UnderDefense. Astra Security was named by eleven of the fourteen models and UnderDefense by seven and Astra Security carries 17 labels and UnderDefense 11, so the shares are not directly comparable.

Astra Security

accepted challenger

Named in four categories this edition.

UnderDefense

accepted challenger

Named in four categories this edition.

First-choice share4%4%Of first choices across the direct, paraphrase, budget and scale prompts, 0 to 100.

Negative rate0%0%Negative labels as a share of the product's labels, 0 to 100.

Rank in category#4#5A position in a field of 10; printed, not drawn.

Labels1711A count; the two differ.

The two percentage rows are drawn on one 0 to 100 track, Astra Security reading right to left. Rank and label count are printed, not drawn.Cobalt was named alongside these two in ten of the fourteen direct answers. Cobalt vs Astra Security · Cobalt vs UnderDefense · BreachLock vs Astra Security

Share is the count of first choices across the direct, paraphrase, budget and scale prompts over all fourteen models, for a mid-market B2B company; rank is within the category; every quote names the model and the prompt it came from. Both figures come from the penetration testing as a service page.

By framing

How many of the fourteen models made each the first choice, per way of asking, and how many argued against it.

Astra SecurityFirst choices, of fourteen modelsUnderDefense

Direct02

Paraphrase00

Comparative20

Budget-constrained20

Scale-constrained00

Negative00

Bars are first choices, 0 to 14 each sideModels that argued againstA model can name both, so the two sides of a row do not sum to fourteen.

Every model, every framing

The eighty-four answers behind the chart above, one cell each: where Astra Security and UnderDefense stood in it.

Model	Direct	Paraphrase	Comparative	Budget-constrained	Scale-constrained	Negative
Claude Haiku 4.5
GPT-5.4 mini
Gemini 3.5 Flash
Perplexity Sonar
Grok 4.1 Fast
Mistral Small
DeepSeek V4 Flash
Llama 4 Maverick
Qwen 3.7 Flash
Kimi K2
GLM 4.7 FlashX
MiniMax M2.5
GPT-6 Luna
Muse Glimmer 30B

Astra Security

UnderDefense

first choice

named as an alternative

argued againstblank: not namedEach cell is one answer, Astra Security on the left and UnderDefense on the right.

The direct prompt

The plain question, one answer per model, grouped by where Astra Security and UnderDefense stood in it.

UnderDefense first, Astra Security not the choice

2 of 14 modelsAstra Security was named in the answer but not as the choice, or not at all.

GLM 4.7 FlashXCobalt, UnderDefense alternatives: BreachLock, NetSPI, Packetlabs

MiniMax M2.5BreachLock, UnderDefense alternatives: Raxis, Synack

Neither was the first choice, one was named

4 of 14 modelsThe answer put something else first and named one of the two as an alternative.

Gemini 3.5 FlashCobalt alternatives: BreachLock, NetSPI, UnderDefense

DeepSeek V4 FlashCobalt, Raxis alternatives: BreachLock, Packetlabs, UnderDefense

Qwen 3.7 FlashRed Siege Security alternatives: Astra Security, BreachLock, Lumina.io, Netragard

Muse Glimmer 30BCobalt alternatives: Astra Security, HackerOne, Netragard, Red Siege, UnderDefense

Neither was named

8 of 14 modelsThe answer made no first choice from these two in this category.

Claude Haiku 4.5BreachLock, Cobalt alternatives: Packetlabs, Raxis, Stingrai

GPT-5.4 miniCobalt alternatives: Cognisys, Trava Security

Perplexity SonarBreachLock alternatives: Cobalt, Raxis, Stingrai

Grok 4.1 FastBreachLock alternatives: Bright Defense, NetSPI, Packetlabs, Prescient Security

Mistral SmallBreachLock, Cobalt alternatives: NetSPI, Stingrai, Synack

Llama 4 Maverickno first choice

Kimi K2Cobalt alternatives: BreachLock, Coalfire, Praetorian

GPT-6 LunaCobalt alternatives: Bishop Fox, NetSPI

Bold names in an answer are the products the judge labeled a first choice; a model naming several gives each of them that label. The full answer text for every row is in the record.

By buyer segment

The same question asked on behalf of a different buyer. Each standing is computed within its segment and they are never added together. The figures above are the mid-market standing, which is the one the category orders by.

Small business

Astra Security leads by nine points.

Astra Security#4 of 8

UnderDefense#6 of 8

The full small business standing →

Mid-marketThe figures above

Level: the same share of first choices.

Astra Security#4 of 10

UnderDefense#5 of 10

The full mid-market standing →

Enterprise

Level: the same share of first choices.

Astra Security#11 of 11

UnderDefense#– of 11

The full enterprise standing →

What the models said about Astra Security

Every negative label with a quote, up to three, then the highest-weighted positives, up to three. Three of four in this category shown.

“like vPenTest or Astra Pentest. These are generally cheaper than fully manual consulting and are designed for SMBs.” GPT-5.4 mini · budget prompt · first choice

“Astra Security – Best overall, offering web and mobile applications, cloud infrastructure, API, and network testing.” Mistral Small · comparative prompt · first choice

“1. Astra Security - Price: Starting at ~$1,999/year ... expert remediation included, strong compliance support” Kimi K2 · comparative prompt · first choice

What the models said about UnderDefense

Every negative label with a quote, up to three, then the highest-weighted positives, up to three. Two of two in this category shown.

“I'd recommend BreachLock or UnderDefense as they specifically target mid-market companies” MiniMax M2.5 · direct prompt · first choice

“UnderDefense or Cobalt offer the best balance of pricing, quality, and scalability” GLM 4.7 FlashX · direct prompt · first choice

Also compared

Cobalt vs Astra Security Cobalt vs UnderDefense BreachLock vs Astra Security BreachLock vs UnderDefense Synack vs Astra Security Synack vs UnderDefense Astra Security vs HackerOne Astra Security vs Bugcrowd UnderDefense vs HackerOne UnderDefense vs Bugcrowd All twenty-one head-to-head pages and the full ptaas standing

Comparisons are drawn for the top eight products in each category, each against each. The output is the models' output; nothing here is a recommendation by the index.