Best Cloud Security Consulting Firms in 2026
Twelve firms compared on cloud coverage, credentials, engagement model and what they publish about price
The best cloud security consulting firms in 2026 range from engineer-led specialists such as Cloud Security Partners, Bishop Fox and NCC Group to security and risk consultancies (Coalfire, GuidePoint Security, Kroll, Mandiant, Optiv, Protiviti) and global firms (Accenture, Deloitte, IBM). They're very different businesses. A 784,000-person consultancy and a fourteen-person engineering team can both call themselves cloud security consultants, and if you've moved past comparing cloud security companies' software, you need to know which kind you're talking to.
This guide compares all twelve on cloud coverage, credentials, engagement model, independent reviews and published pricing. One thing up front: Cloud Security Partners publishes this page and is one of the twelve. We list ourselves first, and we've held our entry to the same fields (and the same stated limitation) as everyone else's.
Which cloud security consulting firm is best for your situation?
No single firm is the best choice for every buyer. The top cloud security consulting companies each fit a different kind of problem, so start from yours:
- Hands-on assessment by named engineers, with a published price: Cloud Security Partners
- Enterprise transformation programs: Accenture, Deloitte, IBM
- Governance and compliance: Protiviti, Coalfire
- Breach-informed assessment and incident response: Kroll, Mandiant
- Security tool selection and deployment: Optiv
- Multi-cloud assessment against a large controls framework: GuidePoint Security
- Configuration and architecture assurance across many clouds: NCC Group
- Offensive testing of a cloud estate: Bishop Fox
If two lines fit, go with the one that matches whatever is forcing the decision: an audit date, an incident or a migration.
How we chose these firms, and where we sit on the list
Cloud Security Partners wrote and published this page, and we're on it. We put our own firm first because it's our page. The other eleven are grouped by type and listed alphabetically inside each group. They aren't ranked. We checked every detail on 24th September 2026 against each firm's own website and its review profiles on Gartner Peer Insights, Clutch and G2, and where a firm doesn't publish something, we say so rather than guess.
A firm made the list only if it met all four criteria:
- Cloud security is a named service line with its own page on the firm's site.
- The firm names at least two of AWS, Microsoft Azure and Google Cloud as covered platforms.
- The firm delivers consulting work itself (assessment, architecture, engineering, testing or response), rather than selling software with services attached.
- The firm delivers engagements in the United States.
We left out three kinds of company:
- Product vendors whose consulting exists to deploy their own platform. Fortinet is the obvious example.
- Managed service providers with no assessment practice.
- Directories and marketplaces.
What does a cloud security consulting firm do?
A cloud security consulting firm is an independent services company that assesses, designs and tests the security of AWS, Microsoft Azure, Google Cloud and connected SaaS environments. Its cloud security consultants find misconfigurations, identity weaknesses and architectural gaps, then give the client prioritized guidance to close them.
A managed security provider runs monitoring and response day to day. A software vendor sells a platform. A cloud security consulting firm sells judgment. (Comparing software instead? See our cloud security platforms compared.) Buyers usually bring in cloud security consulting services at one of four moments:
- A migration: moving workloads into the cloud, or consolidating accounts after an acquisition.
- A first audit or certification: SOC 2, HIPAA, PCI DSS or FedRAMP.
- After an incident: to find how an attacker got in and what else is exposed.
- A new platform or AI workload: a second cloud, Kubernetes at scale, or AI agents touching production data.
The twelve firms at a glance
Firm details checked on 24 September 2026. Only one of the twelve cloud security consulting firms below publishes pricing: Cloud Security Partners. Mandiant has the most Gartner Peer Insights ratings, and even that's just 11, which tells you how thin independent review data is in this market. Headquarters are listed for buyers who want cloud security consulting firms in the USA.
Our firm first: Cloud Security Partners
We list our own firm first because we publish this guide. The facts come from our own site and public review profiles, and they cover the same fields as every other firm here.
Cloud Security Partners
Cloud Security Partners is best suited to engineering-led teams on AWS, Azure or Google Cloud that want hands-on assessment by named engineers and a published price. Cloud Security Partners is a cloud and application security consultancy in the Washington, DC area, founded in 2017, whose engineers pair AI-assisted tooling with human-verified testing across AWS, Azure and Google Cloud.
Cloud Security Partners' core work is the cloud security assessment. Around it sit platform practices for AWS security services, Azure security services, Google Cloud security services and multi-cloud security, plus an ongoing cloud security partnership for teams that want continuing support rather than a one-off project. Across all of it, the team has reviewed hundreds of applications and thousands of cloud implementations.
The Cloud Security Partners team is fourteen people, and every one of them is named on the site, including two Principal Cloud Security Architects. Certifications across the team include AWS Certified, Google Cloud Certified Professional, Microsoft Azure Certified, OSCP, SANS, Terraform Associate and CREST Pathway. The firm is also an AWS Partner. Clients shown on the site include RBC, Cloudflare, RunReveal and Fannie Mae. Reviews: 5.0 on Clutch (2 reviews) and 5.0 on G2 (3 reviews).
Published pricing is the clearest difference. A Cloud Security Partners assessment of an AWS or Azure environment is listed at $2,500 to $30,000+, so you know the range before the first call. A typical engagement covers scoping, a prioritized findings report, an executive summary and a readout session, and senior consultants from the named team do the hands-on work. The limitation: a fourteen-person team suits focused engagements rather than large multi-workstream transformation programs, and independent review evidence is five reviews.
Global consultancies
Accenture, Deloitte and IBM suit enterprises that want cloud security inside a wider transformation program.
Accenture
Accenture is best suited to large enterprises building cloud security into wider transformation programs. The numbers are big: about 784,000 people, headquartered in Dublin, Ireland, and in business since 1989. Its cloud security practice covers security by design, cloud security automation, threat monitoring with automated response, and managed security. Accenture's wider cloud business works with AWS, Microsoft and Google Cloud, and it was named Google Cloud Global Services Partner of the Year and a Leader in the Everest Group Cloud Security Services PEAK Matrix 2025. We couldn't find a current independent rating, and pricing isn't published. The real strength is scale for programs where cloud security runs alongside a global migration. The limitation: its cloud security page names no platforms or certifications, and cloud security is one practice inside a very large firm.
Deloitte
Deloitte is best suited to enterprises that want a managed cloud security platform alongside advisory work. IDC named it a Leader in Worldwide Managed Cloud Security Services, and it was AWS Global Security Partner of the Year in 2023. The cloud security offer runs through Secure by Design, Cyber Cloud Managed Services and attack surface management, across AWS, Google Cloud, Oracle Cloud and multi-cloud estates. Deloitte (US headquarters New York, founded 1845) has more than 80,000 US professionals. It holds 4.6 on Gartner Peer Insights from 6 ratings, with no published pricing. What it does well is pair advisory work with a managed service you can keep running once the consultants leave. The limitation: the offer is built around managed services, and its cloud security page doesn't name Azure.
IBM
IBM is best suited to hybrid and multicloud estates that need continuous visibility and managed services. Picture on-premises systems next to two or three clouds, with one provider watching all of it. IBM (Armonk, New York, founded 1911, 10,000+ employees) covers secure-by-design practices, threat management, response and recovery, automated compliance and managed security across AWS, Azure and Google Cloud, with compliance support for HIPAA, PCI DSS and GDPR. Pricing isn't published. A 5.0 on Gartner Peer Insights sounds great until you see it comes from one rating. The limitation: cloud security is one line inside a large technology company, and independent review evidence is a single rating.
Security and risk consultancies
Coalfire, GuidePoint Security, Kroll, Mandiant, Optiv and Protiviti put security, risk or compliance at the center of the business. It's the most varied group on the list.
Coalfire
Coalfire is best suited to cloud service providers pursuing FedRAMP and other compliance authorizations. Look at the accreditations first: AWS Advanced Consulting Partner, FedRAMP 3PAO, PCI QSA and CMMC C3PAO. A firm that is itself an authorized assessor knows what the auditor will ask for, and that's worth a lot when the authorization date is fixed. Coalfire is based in Denver, Colorado, was founded in 2001 and has more than 1,000 employees. Its AWS work covers FedRAMP managed services, compliance and security on AWS, cloud migration and continuous monitoring, and its advisory page adds Azure and Google Cloud. It holds 5.0 on Gartner Peer Insights from 4 ratings. Pricing isn't published. The limitation: the offer centers on compliance and audit, and there's no single cloud security services page.
GuidePoint Security
GuidePoint Security is best suited to multi-cloud estates that want assessment against a large, fixed controls framework. That framework runs to more than 150 controls. Platform coverage is wide as well (AWS, Azure, Google Cloud, Oracle Cloud and SaaS), which few firms here match. Services cover assessments, strategy, engineering, governance, container security and SaaS security, and staff credentials include CISSP, CCSP, GSE and AWS Security Specialty. GuidePoint is based in Reston, Virginia, was founded in 2011 and has more than 1,000 employees. It doesn't publish pricing. Gartner Peer Insights shows 4.0 from 1 rating. The limitation: independent review evidence is a single rating.
Kroll
Kroll is best suited to buyers who want cloud assessment backed by incident response experience, with more than 3,000 incidents investigated a year. Its services cover security assessments, cloud penetration testing, governance and operations assessments, cloud incident response and migration security. Coverage reaches past the main clouds into Microsoft 365, Google Workspace and Salesforce. The team includes AWS and Azure certified architects, and Kroll is a CREST-accredited penetration testing provider. It's headquartered in New York, traces its history to 1932 and has 6,500 experts. Pricing isn't published. One number deserves attention: 2.5 on Gartner Peer Insights from 9 ratings, the lowest score on this list. Read those reviews before you sign. The limitation: cyber is one practice inside a financial and risk advisory firm.
Mandiant (Google Cloud)
Mandiant is best suited to organizations that want cloud assessment informed by frontline incident response, drawing on what its responders see in live breaches. Founded in 2004 and part of Google Cloud since 2022, Mandiant offers cloud security assessments, cloud penetration testing, and Microsoft 365 and Azure security assessments and rapid reviews, covering AWS, Azure, Google Cloud and Microsoft 365. IDC MarketScape named it a Leader in Incident Response in 2025. At 4.9 from 11 ratings, it has more Gartner Peer Insights ratings than any other firm here. Pricing isn't published. The limitation: it's owned by a cloud provider, which multi-cloud buyers may want to weigh, and it publishes no standalone headcount.
Optiv
Optiv is best suited to buyers selecting and deploying cloud security tooling. If the question on your desk is which CNAPP to buy, how to configure it and who runs it afterward, Optiv is organized around exactly that. Its cloud work covers strategy and architecture, architecture assessment, CNAPP deployment and configuration, CSPM, CIEM and DSPM across AWS, Azure and Google Cloud, with more than 450 technology partners. Optiv is based in Denver, Colorado, was founded in 2015 and has 1,001 to 5,000 employees. Gartner Peer Insights: 3.9 from 4 ratings. Pricing isn't published. The limitation: the offer is organized around technology categories and tool deployment, and no formal accreditations are stated.
Protiviti
Protiviti is best suited to governance and compliance-led cloud programs in regulated industries. Where it earns its fee is translation, turning cloud controls into the governance language that audit committees, internal audit teams and regulators expect to see. Headquartered in Menlo Park, California, founded in 2002 and a subsidiary of Robert Half, Protiviti has more than 5,000 employees. Its cloud security services cover advisory and governance, strategy, architecture and transformation, managed cloud security and cloud compliance review across Azure, AWS and Google Cloud, with partnerships with Microsoft, AWS and Google Cloud. It holds 4.8 on Gartner Peer Insights from 7 ratings. Pricing isn't published. The limitation: the offer leans toward governance and compliance review, and no partner tiers or named credentials are stated.
Engineer-led and technical specialists
Bishop Fox and NCC Group sit alongside Cloud Security Partners as engineer-led firms built around technical testing and assurance rather than advisory programs.
Bishop Fox
Bishop Fox is best suited to teams that want objective-based offensive testing of their cloud estate. What can an attacker actually reach from a foothold in your cloud? That's the question Bishop Fox answers, and it's a different question from which settings are wrong. Its cloud penetration testing goes beyond configuration review, and the Cosmos platform supports continuous testing across AWS, Azure and Google Cloud. Bishop Fox is headquartered in Tempe, Arizona, was founded in 2005 and has 100 to 500 employees. It's an FS-ISAC Affiliate Partner and a Health-ISAC member. Gartner Peer Insights shows 4.8 from 2 ratings for penetration testing. Pricing isn't published. The limitation: its cloud offer is offensive testing only, with no advisory, architecture or managed services.
NCC Group
NCC Group is best suited to teams that want configuration and architecture assurance across a wide range of clouds. How wide? AWS, Azure, Google Cloud, Oracle, Alibaba and container platforms. That's five cloud providers, more than any other firm here. Services cover cloud configuration assessments, cloud security assurance review, infrastructure architecture review, and container and orchestration review. NCC Group is headquartered in Manchester, UK, with its North American headquarters in Chicago. It was founded in 1999 and has more than 1,800 experts. Accreditations include CREST membership, CHECK, NCSC and UKAS. We found no consulting rating, and pricing isn't published. The limitation: it's UK-headquartered, most of its accreditations are UK schemes, and no US review data was found.
What does a cloud security engagement look like?
A full cloud security engagement moves through five phases (assess, architect, build and automate, operate, respond), and you can buy each one on its own.
Assess
In the assess phase, the consulting firm reviews and tests your accounts, subscriptions and projects against a defined scope. You get severity-rated findings, an executive summary and prioritized remediation guidance.
Architect
In the architect phase, the firm designs the target state: account structure, identity model, network segmentation and logging. You get reference architectures your engineers can build against.
Build and automate
In the build and automate phase, controls move into infrastructure as code, policy as code and pipeline checks. You end up with working modules and guardrails instead of a list of settings to change by hand.
Operate
In the operate phase, the firm reviews changes, new services and drift on a recurring schedule. You get periodic reviews and a named contact who already knows your estate, so nobody has to relearn it every quarter.
Respond
In the respond phase, the firm investigates, contains and helps you recover when something goes wrong. You get a timeline, the root cause and the fixes that stop a repeat.
What should a cloud security assessment examine?
A cloud security assessment should examine identity and access, network exposure, encryption, logging, backup, incident readiness, infrastructure as code, containers, SaaS and AI workloads, whichever firm runs it:
- Network access control: security groups, firewall rules and internet exposure.
- Identity and access management: roles, policies, cross-account trust and standing privilege.
- MFA and federated access: SSO and the accounts that bypass it.
- Encryption and key management: data at rest and in transit, and key rotation.
- Logging and alerting: audit logs that are on, retained and watched.
- Backup and disaster recovery: backups that are isolated and restore-tested.
- Incident response readiness: runbooks, responder access and evidence preservation.
- Infrastructure as code: Terraform, CloudFormation or Bicep, and the pipeline that deploys it.
- Containers and Kubernetes: cluster configuration, workload identity and image provenance.
- SaaS: Microsoft 365, Google Workspace, Salesforce and third-party app access.
- AI workloads: model endpoints, agent permissions and reachable data.
The findings Cloud Security Partners sees most often
Misconfigured IAM
Weak identity and access management settings, such as missing MFA, outdated access keys, and excessive permissions, can give attackers unauthorized access to cloud resources. These misconfigurations increase the risk of compromised accounts, data exposure, and privilege escalation.
Overly Permissive Network Access
Security groups and network rules that allow unnecessary access, such as SSH exposed to the internet or unrestricted traffic between systems, create opportunities for attackers. Limiting access to only the ports, protocols, and resources required helps reduce the attack surface and prevent lateral movement.
Lack of Logging and Monitoring
Missing or improperly configured logging, such as disabled S3 access logs, VPC Flow Logs, or security alerts, can allow suspicious activity to go undetected. Without adequate visibility, security teams may struggle to identify threats, investigate incidents, and determine the extent of a compromise.
Want a step-by-step version to work through before an engagement? Use our cloud security assessment checklist.
How do you choose a cloud security consulting firm?
Choosing a cloud security consulting firm comes down to six decisions: scope, platforms, one-off or ongoing work, the compliance driver, firm size and budget. Each one has a rule of thumb.
The scope of the problem
Name the question you need answered first. "Are we exposed?", "Can we pass the audit?" and "How did they get in?" lead to different firms. Rule of thumb: if you can't state the question in one sentence, buy a scoped assessment first.
The platforms in use
Check that the firm names your platforms on its own cloud security page, not just on a partner badge. Our rule: if you run more than one cloud, pick a firm that names all of them.
One-off assessment or ongoing partnership
A one-off assessment is a snapshot. An ongoing arrangement catches drift. The test: if you ship infrastructure changes weekly, an annual assessment is out of date within a quarter.
The compliance driver
If an audit or authorization is driving the work, the firm's accreditations matter as much as its engineers. For FedRAMP, PCI DSS or CMMC, confirm the firm holds the matching assessor status or works alongside one that does.
Global firm or specialist
Global firms bring scale and program management. Specialists bring direct access to the people doing the work. Rule of thumb: choose a global firm when cloud security is one workstream in a larger transformation, and a specialist when it's the whole job.
Budget
Most firms quote only after a scoping call. Ask every firm on your shortlist for a range before that call. A firm that won't give one has told you something.
Need a penetration test rather than a broader cloud review? See our guide to the best penetration testing companies and our penetration testing services.
How much does cloud security consulting cost?
A cloud security assessment from Cloud Security Partners costs $2,500 to $30,000+ for an AWS or Azure environment, and none of the other eleven firms on this list publishes a price. The cloud security consulting cost moves with the size of the scope, the complexity of the environment, how many environments are tested, the depth of testing, compliance and reporting requirements, and how urgent the timeline is. Our published pricing by service lists every range, and the security cost estimator gives you a figure based on your own environment.
Questions to ask before you sign
Ask every firm on your shortlist the same nine questions. Ask us, too.
- Which named people will do the work, and what certifications do they each hold?
- Which of our cloud platforms is the team certified on?
- Can we see a sample report?
- Are findings retested after we fix them, and is the retest included in the price?
- Do you fix what you find, or only advise?
- Who owns the findings and the report once the engagement ends?
- What happens to our data and credentials afterward?
- How is your access to our environment granted, logged and removed?
- What would change the fixed price?
Frequently asked questions
What certifications should a cloud security consultant hold?
A cloud security consultant should hold a security certification for each platform they assess, such as AWS Certified Security Specialty, Microsoft Certified: Azure Security Engineer Associate or Google Professional Cloud Security Engineer. CCSP and CISSP show vendor-neutral breadth, and OSCP matters for hands-on testing. The firm-wide count matters less than you'd think. Ask which named people on your engagement hold them.
Which industries use cloud security consultants most?
Financial services, healthcare, government contractors and SaaS companies use cloud security consultants most, because each carries a compliance driver: PCI DSS and regulator scrutiny in financial services, HIPAA in healthcare, FedRAMP and CMMC for government work, and SOC 2 for SaaS vendors selling to enterprises.
How long does a cloud security engagement take?
A standalone cloud security engagement at Cloud Security Partners runs two to four weeks from kickoff to final report, depending on scope. Ongoing partnerships don't have an end date.
Do we need a consultant if we already have a cloud engineering team?
You need a cloud security consultant when you want independence, offensive experience or a comparison against other estates, and an in-house team can't give itself any of those. If your team already runs regular internal reviews, faces no audit and hasn't changed its architecture in a while, you probably don't need one yet.
Does the firm fix what it finds, or only report it?
Most cloud security consulting firms report and advise by default, and hands-on remediation is usually scoped and priced separately. Confirm which you're buying before you sign. Remediation, where the firm's engineers change your configuration or code, needs its own access arrangements and its own line in the statement of work.
Talk to us about your cloud environment
Cloud Security Partners is the only firm on this list that publishes its price, starting at $2,500 for an AWS or Azure cloud security assessment. The next step is a scoping call with one of our engineers, then a fixed-scope proposal. Get Started or Contact Us.
About the Author
Michael McCabe founded Cloud Security Partners in 2017 to create and implement security solutions for a select number of clients.
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