Are you a security testing company based in London?

Hashorn works with clients in London and across the United Kingdom. Our engineering and QA team is anchored in India with team members in the UAE, and we deliver to London-based startups, agencies, and enterprises on a remote-first model.

How quickly can you start work for a team in London?

Typically 1–2 weeks for dedicated engagements. Short sprint pods and audits can start the same week if requirements are clear.

Do you sign NDAs and DPAs with London-based clients?

Yes. We sign mutual NDAs before any scoped information is shared and DPAs (and BAAs where relevant) for engagements processing personal or sensitive data.

Location · Security Testing Company

Security Testing Company in London

London is the largest software engineering market in Europe — heavy concentration of fintech (Monzo, Revolut, Wise), B2B SaaS, and enterprise software. Buyers are typically experienced CTOs and engineering leaders who care more about delivery discipline than cost. Hashorn works as your security testing company for teams in London and across the United Kingdom. Threat modelling, code review, API and cloud security testing built into the same sprint that ships features.

Book an intro call How we deliver

UTC+0 gives London a full afternoon overlap with India, a half-day overlap with the UAE, and a morning overlap with the US east coast.

Local context

What the market looks like

Why our delivery model is shaped for buyers in this market.

Densest fintech engineering market in Europe; sophisticated buyer expectations around compliance, security, and audit.

Strong remote-first culture post-2020; comfortable hiring senior engineers in different time zones.

Premium on senior-only delivery, weekly cadence, and clear technical communication.

Who we work with

Typical buyers

Series A–C fintech and B2B SaaS startups in London.

Scaling product companies looking for offshore engineering, QA, and security capacity.

Agencies serving enterprise clients in the City and across the UK.

What you get

As your security testing company

Threat modelling, code review, API and cloud security testing built into the same sprint that ships features.

Threat model and prioritised risk register

Code, API, web, mobile, and cloud testing

Severity-rated findings with reproductions and fixes

Re-test and release sign-off

SDLC recommendations baked into your sprint

Optional SAST/DAST tooling rollout

How we deliver

Our process

Senior engineers run the work. AI handles the scaffolding. Weekly demos keep things honest.

01

Threat model

Map the trust boundaries, sensitive assets, and the realistic attacker model for the product.

02

Test

Manual and tool-assisted testing — code review, API, web, mobile, cloud — to the OWASP and CIS baselines.

03

Report

Severity-rated findings with reproductions, fixes, and verification steps.

04

Retest

Re-test fixes, sign off the release, and roll learnings into your SDLC.

Stack

Tools and technologies

Burp SuiteOWASP ZAPSemgrepTrivySnykCheckovtfsecNmapMobSFFrida

FAQ

Questions clients ask before we start.

Other services here

Nearby and related

Building in London? Let's talk.

Tell us what you're building, we'll tell you how we'd ship it.

Book an intro call →