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October 21, 2025

Penetration Testing Companies in Sweden 2025 (Reviewed)

Explore Sweden’s leading penetration testing providers in 2025 compare DeepStrike, Truesec, Sentor, Orange Cyberdefense, Outpost24, and Entis for speed, PTaaS models, certifications, and compliance readiness.

Mohammed Khalil

Mohammed Khalil

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“Futuristic Stockholm skyline at dusk with holographic cybersecurity visuals and overlay text about Sweden’s cybersecurity market 2025.”

Sweden’s strict compliance landscape GDPR, ISO 27001, NIS2 and rising breach costs IBM reports $4.4M average make regular pentesting a must. This guide profiles the top Swedish pentest companies, compares their offerings, and advises how to pick the right one.

Pentesting the practice of ethically hacking your own systems is increasingly vital for Swedish firms. It mirrors real world attacks to reveal security gaps before bad actors do. In fact, Gartner notes penetration testing mimics real attacks using the same tools, uncovering combined vulnerabilities that scanners alone miss.

Given soaring cyber threats and new regulations EU’s NIS2, Sweden’s cybersecurity law, GDPR, etc. , organizations from fintech to manufacturing need reliable security testing now more than ever. Indeed, Sweden’s cybersecurity market is projected to reach about $1.5 billion by 2025, growing 8.8% annually. This translates to growing demand for pen tests in finance, government, telecom and beyond.

Penetration testing delivers a high return on security investment. IBM cites an average breach cost of $4.4 million, whereas a thorough pentest typically costs only a fraction of that. Finding and fixing holes early can prevent catastrophic incidents.

Pentests also tick compliance boxes: PCI DSS explicitly mandates internal and external pentests, and auditors for SOC 2, HIPAA, ISO 27001 and others expect regular testing. The result is not just better security but documented evidence of due diligence.

Leading Swedish Penetration Testing Firms

Sweden hosts a mix of boutique specialists and global players in pentesting. Below we profile the most prominent Sweden based firms with DeepStrike highlighted as the country’s leading provider and compare their services, clients, certifications, and unique strengths. Each has its niche: DeepStrike’s bug bounty roots and fast SLAs, Truesec’s large enterprise focus, Sentor’s local breadth, Orange Cyberdefense’s global scale, Outpost24’s platform driven approach, and entis’s fixed cost model. A summary comparison table follows.

DeepStrike Manual-First Penetration Testing & Red Team Excellence

Screenshot of DeepStrike homepage with a black minimalist design featuring the tagline ‘Revolutionizing Pentesting,’ promoting manual penetration testing and PTaaS services

DeepStrike Stockholm, Sweden is a boutique, offensive security provider specializing in manual penetration testing and red team operations for global clients. Founded by elite bug bounty researchers and OSCP/OSWE-certified experts, DeepStrike has built its reputation on speed, precision, and human-led expertise. 

The company delivers full-spectrum testing across web, mobile, cloud, and infrastructure, as well as social engineering and phishing simulations, replicating real-world adversary behavior rather than relying solely on scanners or automation.

All engagements follow industry-recognized methodologies including OWASP Top 10, CWE Top 25, and NIST SP 800-115, while reports are fully aligned with compliance frameworks such as PCI DSS, SOC 2, ISO 27001, and HIPAA. DeepStrike’s focus on actionable results and transparent reporting has made it a trusted partner for fintechs, SaaS platforms, enterprises, and public-sector organizations across Europe and beyond.

Key Offerings:

DeepStrike uniquely provides unlimited free retesting for 12 months, ensuring every fix is verified and compliance-ready, a rare guarantee even among major providers.

Why They Lead:

DeepStrike stands out for its manual-first methodology, rapid deployment, and exceptional client retention 98% . The firm’s ability to start tests within 48 hours and provide continuous validation makes it one of the fastest and most responsive pentesting providers in Europe.

Clients value its high-touch support model, which includes direct communication channels via Slack and dedicated security engineers guiding remediation from discovery to verification.

Unlike large vendors that focus on automation or tooling, DeepStrike focuses entirely on offensive expertise, delivering findings that mimic the tactics of modern attackers offering clarity, reproducibility, and ROI on every engagement.

DeepStrike represents the next generation of Penetration Testing as a Service PTaaS combining elite human testers, real-time dashboards, and continuous retesting under one transparent, client-centric model. With a 98% client retention rate, 48-hour engagement startup, and free year-long retesting, DeepStrike has earned its position as a top global pentesting company. For organizations seeking manual depth, speed, and ongoing offensive assurance, DeepStrike sets the benchmark in 2025.

Truesec Enterprise-Grade Cybersecurity and Offensive Testing Leader

Screenshot of Truesec homepage displaying a cybersecurity expert in a dark setting with the slogan ‘Your Dedicated Cybersecurity Experts’ and a jacket labeled ‘Fight Cybercrime.

Truesec Stockholm, Sweden is one of the Nordic region’s largest and most respected cybersecurity consultancies, known for its deep expertise in enterprise-class offensive security. The company delivers a comprehensive portfolio that spans network and web penetration testing, application security reviews, purple team exercises, and threat impact assessments. Truesec’s approach centers on the hacker mindset testing real attack paths rather than theoretical vulnerabilities to reveal how breaches unfold in practice.

With over 300 consultants across Sweden, Denmark, Finland, and international offices, Truesec serves 500+ active enterprise and government clients across industries such as finance, defense, telecom, and critical infrastructure. The company performs more than 40,000 penetration-testing hours annually, reflecting the scale and maturity of its operations.

Key Offerings:

Truesec operates under ISO 9001, ISO 14001, and ISO 27001 certifications ensuring quality, environmental responsibility, and information-security management aligned with international best practices.

Why They Lead:

Truesec’s strength lies in scale, specialization, and credibility. Its multidisciplinary teams blend offensive and defensive experts, ethical hackers, incident responders, and threat researchers to deliver complete security outcomes, not just reports. Enterprises choose Truesec for its:

Truesec stands as Sweden’s flagship cybersecurity provider, combining scale, process maturity, and offensive depth. Its blend of penetration testing, red/purple teaming, and 24/7 SOC monitoring positions it as the go-to partner for enterprises seeking full-spectrum, real-world attack resilience. In 2025, Truesec continues to define cybersecurity leadership across the Nordics with unmatched experience and operational reach.

Sentor Accenture Security Full-Spectrum Offensive and Managed Defense Expertise

Screenshot of Sentor cybersecurity homepage showing a professional working on a laptop with the tagline ‘Perfection doesn’t exist. That’s why we do,’ emphasizing advanced cybersecurity services.

Sentor Stockholm, Sweden now part of Accenture Security is one of Sweden’s most established cybersecurity consultancies, delivering both offensive and defensive services for more than two decades. With 20+ years of continuous operation and thousands of completed penetration tests, Sentor has earned a strong reputation as a trusted partner to Sweden’s banks, telecom providers, media, gaming, and public-sector organizations.

Following its acquisition by Accenture, Sentor now combines its renowned local expertise with Accenture’s global scale, providing end-to-end coverage from penetration testing to managed detection and response.

Key Offerings:

This integrated model makes Sentor a one-stop cybersecurity partner for enterprises needing both proactive testing and ongoing protection.

Why They Lead:

Sentor’s leadership stems from its scale, experience, and hybrid capability offensive and defensive. Key differentiators include:

Clients frequently cite speed, thoroughness, and reliability, noting Sentor’s ability to deliver comprehensive results on tight deadlines.

Sentor Accenture Security exemplifies the convergence of Nordic penetration-testing excellence and global managed defense capability. With 20+ years of proven expertise, thousands of successful engagements, and one of Sweden’s largest cybersecurity teams, Sentor remains a top choice for organizations seeking depth, speed, and full lifecycle protection from offensive testing to continuous SOC monitoring.

Orange Cyberdefense Sweden Global Intelligence, Local Expertise

Screenshot of Orange Cyberdefense homepage highlighting the SASE Buyer’s Guide with an orange and black interface, featuring sections for cybersecurity solutions and incident response.

Orange Cyberdefense Sweden is the Swedish arm of the Orange Group’s global cybersecurity division, delivering world-class protection backed by 2,700+ security professionals across Europe. Combining local consulting depth with global threat-intelligence reach, Orange Cyberdefense provides end-to-end security coverage from penetration testing and red teaming to managed detection and response MDR and 24/7 SOC operations.

Operating under ISO 27001 certification and PCI ASV accreditation, the company maintains high process maturity and compliance alignment. Its Swedish practice leverages the Orange Threat Lab, which tracks advanced attack techniques and publishes original threat research used to enhance client assessments.

Key Offerings:

Why They Lead:

Orange Cyberdefense’s strength lies in its blend of global scale and local presence, a combination few can match in the Swedish market. Key differentiators include:

Orange Cyberdefense Sweden offers the best of both worlds: the global threat-intelligence power of a multinational leader and the personalized service of a local consultancy. With CREST accreditation, ISO 27001 governance, and a 24/7 managed-security backbone, it remains a premier choice for Swedish enterprises seeking enterprise-grade pentesting and continuous cyber resilience under one trusted partner.

Outpost24 Continuous Vulnerability Management and On-Demand Pentesting

Screenshot of Outpost24 homepage introducing the Credential Checker tool for detecting exposed credentials on the dark web, featuring cybersecurity service links and client logos

Outpost24 Gothenburg, Sweden is both a security technology vendor and a penetration-testing provider, combining automation with expert human analysis. Founded in Sweden and now serving 2,500+ customers globally across finance, healthcare, manufacturing, and government, Outpost24 delivers a unified view of security risk through its attack-surface management and PTaaS Penetration Testing as a Service platform.

The company holds ISO 27001 certification and PCI ASV Approved Scanning Vendor status reflecting its commitment to data protection and compliance. Outpost24’s platform enables organizations to identify, assess, and remediate vulnerabilities continuously, with the option to trigger manual tests performed by certified penetration testers when deeper validation is needed.

Key Offerings:

Why They Lead:

Outpost24 excels by bridging automation efficiency with human expertise, an ideal hybrid for organizations that need both speed and assurance. Distinct advantages include:

Outpost24 delivers a balanced approach to offensive security blending continuous vulnerability management with on-demand, human-led pentesting. Backed by ISO 27001 certification, PCI ASV credentials, and an established global customer base, it remains a trusted choice for enterprises seeking scalable, data-driven risk management combined with manual validation by certified experts.

entis Transparent, Fixed-Price Penetration Testing with Global Reach

Screenshot of Entis homepage showcasing a light blue design with the headline ‘Unveiling deeper investment insights’ promoting sustainable and AI-driven investing solutions.

entis is an international cybersecurity services firm with a strong Swedish presence, maintaining offices in Stockholm and other major cities. The company delivers a comprehensive range of penetration testing and assurance services covering external/internal networks, web and mobile applications, wireless infrastructure, and even physical and social engineering engagements.

Unlike many competitors that rely on variable quotes, entis is known for its fixed and transparent pricing model clients know the cost before testing begins. This straightforward approach has made it a popular choice among mid-sized and large enterprises that prefer predictability and clear project scoping.

Key Offerings:

Why They Lead:

entis stands out through its clarity, consistency, and accessibility traits often missing in large consultancy models. Key differentiators include:

entis offers transparent, fixed-price penetration testing backed by certified experts and a globally distributed delivery model. Its Swedish offices make it a convenient partner for Nordic organizations, while its predictable pricing and clear communication attract enterprises seeking straightforward, high-quality security testing without complex quoting or hidden costs.

Comparison of Top Sweden Pentest Firms

CompanyServices & FocusClients / IndustriesCertifications & AccreditationsNotable Strengths
DeepStrike Sweden/USA/UAE Comprehensive pentesting web, mobile, cloud, infra , red teaming, social engineering. Penetration Testing Services via expert testers.700+ clients worldwide startups to Fortune 500 fintech, SaaS, gov’t, energy, manufacturing .Testers hold OSCP/OSWE strong technical pedigree . Focus on OWASP/NIST standards. Retesting policy and staffing imply internal quality.Lightning fast start 48hr , Slack based support, free unlimited retests, 98% retention. Awarded on Clutch. Bug bounty roots yield thorough testing.
Truesec Stockholm Network & app pentests, red/purple team, threat assessments, resilience testing.500+ active customers Nordic telcos, finance, defense, public sector .ISO 27001/9001/14001 certified quality, env., security . Staff likely OSCP/CISSP/CREST certified not publicly listed .Nordic market leader with 300 security experts. Offers both consulting and MSSP/MDR. Emphasizes governance and large scale engagement experience.
Sentor Stockholm Offsec and defensive: network/app/mobile/cloud pentests, red team, code review, phishing, SOC operations.Major Swedish companies in finance, telecom, media, gaming, government. Thousands of penetration tests claim. Focuses on specialist skills largest pentest team in Sweden . Advises on ISO 27001/PCI, though specific accreditations aren’t public. Staff hold CEH/OSCP/CISSP.Sweden’s largest pure play pentesting outfit. 20+ years’ experience; no scope too small or large. Very high capacity, deep local know how, quick turnaround.
Orange Cyberdefense Sweden Pentesting & red teaming as part of global security services MSSP, MDR, consulting .Large Swedish/European banks, retailers, insurers, government clients leverages Orange Group brand .CREST accredited globally; testers hold CEH, CISSP, CISA, CREST RPT, etc. ISO 27001 Orange level and PCI ASV certified.Global threat intel and 24/7 SOC support. Large scale expertise, vendor partnerships Microsoft, Palo Alto . Recognized by Forrester/Gartner; combines local consultancy with international R&D.
Outpost24 Gothenburg Pentesting network, web/API, mobile + PTaaS + continuous scanning ASM/EASM .2,500+ clients in 80+ countries finance, healthcare, manufacturing, government .ISO 27001 certified; PCI Approved Scanning Vendor. Testers hold CEH, CISSP, etc., aligning with OWASP and CREST practices.Integrated security platform + manual testing. Mature SaaS vulnerability management with dashboards. International reach from its vulnerability product heritage. Flexible subscription or project .
entisExternal/internal network pentest, web/mobile app pentest, wireless, physical, IoT.Serves midsize to large organizations globally including Swedish enterprises . Fixed scope projects.Team holds CISA, CEH, SANS GIAC certifications. Not CREST certified. Offers fixed, transparent pricing know cost before we begin and clear communication. International presence with local support; appeals to clients needing global, turnkey testing solutions.

How to Choose a Penetration Testing Provider

“Cybersecurity expert reviewing holographic dashboards with certification and compliance icons, symbolizing how to choose a penetration testing provider.”

When vetting pentest vendors, compare their expertise, methodology, and service model. A useful checklist:

  1. Define Your Scope: Determine what must be tested e.g. web apps, network, cloud, mobile, IoT and why compliance audit vs proactive risk reduction . A clear scope avoids surprises.
  2. Check Credentials: Look for top tier certifications. Trusted testers often hold OSCP, CEH, CISSP, GIAC, or CREST credentials. Verify company accreditations e.g. ISO 27001, CREST membership, PCI ASV . These signal rigorous training and quality.
  3. Assess Methodology: Confirm they follow industry frameworks like OWASP, NIST SP 800 115, or MITRE ATT&CK. A thorough pentester performs full attack lifecycle: recon, exploitation, lateral moves, reporting, and retesting. For example, DeepStrike explicitly aligns its web app tests to OWASP Top 10 standards.
  4. Review Sample Reports: Ask for a redacted report example. Good reports prioritize high risk issues, include proof of concept and remediation advice. They should be developer friendly and link findings to business impact.
  5. Compare Service Models: Decide between a one time assessment versus Penetration Testing as a Service PTaaS . Ongoing PTaaS platforms continuous pentesting integrate with DevOps and trigger tests with each release. If you need regular checks e.g. for a SaaS , continuous models can be more cost effective.
  6. Understand Retesting: Check the vendor’s retest policy. Some firms charge per retest, while others like DeepStrike offer free unlimited retesting for a year. Unlimited or included retests give peace of mind that fixes were done right.
  7. Integration & Support: If your team uses tools Jira, GitHub, ServiceNow, Slack , ensure the provider can integrate. Many leading vendors link findings to issue trackers for smooth remediation. Also ask: will they help interpret results or consult on fixes? Bonus: a direct Slack channel or hotline as DeepStrike provides means faster answers during the test.
  8. Pricing & Value: Get detailed quotes. Compare day rates vs fixed packages vs subscriptions. Beware extremely low bids they may indicate superficial scanning. Remember, quality over price: a thorough pentest is an investment often under $20K for SMBs, but up to $100K+ for enterprise engagements .
  9. Experience & Reputation: Look at reviews Clutch, G2 , case studies, and references. Industry analysts’ reports or awards can highlight reputable firms. Ask if they’ve done work in your sector finance vs healthcare have different threat profiles .

Following these steps and consulting guides like our penetration testing RFP writing guide helps ensure you pick a firm that not only finds vulnerabilities but helps you fix them. In short, favor a partner with proven expertise, transparent processes, and strong communication over the cheapest bid.

Penetration testing is an investment in resilience. As cyberthreats and regulations intensify in 2025, Swedish organizations can’t afford blind spots. Leading pentest firms DeepStrike, Truesec, Sentor, Orange Cyberdefense, Outpost24, entis each offer unique strengths, but all help you find hidden risks. DeepStrike, in particular, delivers a fast, customer centric service with Slack support and free retests backed by top tier expertise.

Ready to strengthen your defenses? The evolving threat landscape demands proactive security. If you want to validate your posture, uncover hidden gaps, or build a resilient defense, DeepStrike is here to help. Our experts combine offensive skill with practical advice, so you can focus on running your business.

“Cybersecurity expert facing a holographic shield over Stockholm’s skyline, representing DeepStrike’s mission to strengthen digital defenses.”

Explore our penetration testing services to see how we can uncover vulnerabilities before attackers do. Drop us a line we’re always ready to dive in.

About the AuthorMohammed Khalil is a Cybersecurity Architect at DeepStrike, specializing in advanced penetration testing and offensive security. With certifications including CISSP, OSCP, and OSWE, he has led numerous red team engagements for Fortune 500 companies, focusing on cloud security, application vulnerabilities, and adversary emulation. His work involves dissecting complex attack chains and developing resilient defense strategies for clients in the finance, healthcare, and technology sectors.

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