ISO 27001 certification bodies
17 accredited certification bodies, grouped by buyer stage. Every price is labeled with its source — see the methodology.
BSI Group
BSI Group originated the standard that became ISO 27001 (as BS 7799) and is one of the world's best-known certification bodies, with auditors in most major mark…
SGS
SGS is the world's largest testing, inspection and certification company, with a management-systems certification arm covering ISO 27001 in dozens of countries.…
Bureau Veritas
Bureau Veritas is a global testing, inspection and certification group dating to 1828, with ISO 27001 certification among a broad management-systems portfolio. …
NQA
NQA is a global management-systems certification body with an explicit focus on right-sized service for small and mid-sized companies. It certifies ISO 27001 al…
BARR Advisory
BARR Advisory is accredited to certify against ISO 27001, 27701, and 42001, and pairs that with SOC 1/2/3 attest services — a combination that suits US technolo…
Prescient Assurance
Prescient Assurance, founded in 2021, is an ANAB-accredited ISO 27001 certification body with a startup-oriented, technology-driven engagement model. It also pe…
NSF
NSF, founded in 1944 as the National Sanitation Foundation, grew into a global certification body covering management systems including ISO 27001. Known in the …
DEKRA
DEKRA is a German expert organization in testing, inspection, and certification, accredited for ISO 27001 by DAkkS. Particularly strong in automotive, manufactu…
TÜV Rheinland
TÜV Rheinland is one of the classic German certification bodies, accredited by DAkkS for ISO 27001 and operating in most major markets. Its brand carries strong…
Kiwa
Kiwa is a Dutch-rooted global testing, inspection and certification company, accredited for ISO 27001 by the Dutch accreditation body RvA. Strong in the Benelux…
Schellman
Schellman is a top-50 US firm and one of the few practices accredited for ISO 27001 that also performs SOC attestations as a CPA firm, PCI assessments, FedRAMP,…
A-LIGN
A-LIGN is an ANAB-accredited ISO 27001 certification body that pairs audit services with its A-SCEND compliance management platform. A high-volume practice trus…
Intertek
Intertek is a global quality-assurance and certification group with an ISO 27001 certification practice aimed at mid-market companies. Markets flexible scheduli…
DQS
DQS (Deutsche Gesellschaft zur Zertifizierung von Managementsystemen) is a German management-systems certification specialist, accredited by DAkkS for ISO 27001…
DNV
DNV is an independent assurance and risk-management provider operating in more than 100 countries, accredited for ISO 27001 by RvA. Particularly strong in energ…
LRQA
LRQA is a global assurance provider formed from Lloyd's Register's business-assurance arm, with UKAS-accredited ISO 27001 certification among its services. It s…
TÜV SÜD
TÜV SÜD is a German testing, inspection and certification group accredited by DAkkS for ISO 27001, with a global network covering the full certification journey…
For startups
First ISO 27001 certification, small teams, tight budgets. These CBs have the lowest planning ranges in this directory and startup-shaped delivery.
| Certification body | Type | Audit-fee planning range | Certification window |
|---|---|---|---|
| NQA | Accredited certification body | $10K–$30K (published planning range, Sept 2026) | 3–6 mo |
| BARR Advisory | ANAB-accredited ISO 27001 certification body | $10K–$35K (published planning range, Sept 2026) | 3–6 mo |
| Prescient Assurance | ANAB-accredited ISO 27001 certification body | $10K–$35K (published planning range, Sept 2026) | 3–6 mo |
| Intertek | Accredited certification body | $10K–$30K (published planning range, Sept 2026) | 3–6 mo |
Planning ranges are not quotes. See our methodology for how prices are labeled and verified.
For growth-stage companies
Series A to mid-market: credible certificates for larger customers, often with ISO 27701 or SOC 2 available under the same roof.
| Certification body | Type | Audit-fee planning range | Certification window |
|---|---|---|---|
| BSI Group | Accredited certification body | $15K–$50K (published planning range, Sept 2026) | 4–9 mo |
| SGS | Accredited certification body | $15K–$50K (published planning range, Sept 2026) | 4–9 mo |
| Bureau Veritas | Accredited certification body | $15K–$50K (published planning range, Sept 2026) | 4–9 mo |
| NQA | Accredited certification body | $10K–$30K (published planning range, Sept 2026) | 3–6 mo |
| BARR Advisory | ANAB-accredited ISO 27001 certification body | $10K–$35K (published planning range, Sept 2026) | 3–6 mo |
| NSF | Accredited certification body | $10K–$30K (published planning range, Sept 2026) | 3–6 mo |
| DEKRA | Accredited certification body | $15K–$50K (published planning range, Sept 2026) | 4–9 mo |
| TÜV Rheinland | Accredited certification body | $15K–$50K (published planning range, Sept 2026) | 4–9 mo |
| Kiwa | Accredited certification body | $10K–$35K (published planning range, Sept 2026) | 3–6 mo |
| Schellman | ANAB-accredited ISO 27001 certification body | $15K–$50K (published planning range, Sept 2026) | 4–9 mo |
| A-LIGN | ANAB-accredited ISO 27001 certification body | $15K–$50K (published planning range, Sept 2026) | 4–9 mo |
| Intertek | Accredited certification body | $10K–$30K (published planning range, Sept 2026) | 3–6 mo |
| DQS | Accredited certification body | $10K–$30K (published planning range, Sept 2026) | 3–6 mo |
| DNV | Accredited certification body | $15K–$50K (published planning range, Sept 2026) | 4–9 mo |
| LRQA | Accredited certification body | $15K–$50K (published planning range, Sept 2026) | 4–9 mo |
| TÜV SÜD | Accredited certification body | $15K–$50K (published planning range, Sept 2026) | 4–9 mo |
Planning ranges are not quotes. See our methodology for how prices are labeled and verified.
For enterprise buyers
Multi-site, multinational, or regulated programs — or a customer that requires a globally recognized CB brand.
| Certification body | Type | Audit-fee planning range | Certification window |
|---|---|---|---|
| BSI Group | Accredited certification body | $15K–$50K (published planning range, Sept 2026) | 4–9 mo |
| SGS | Accredited certification body | $15K–$50K (published planning range, Sept 2026) | 4–9 mo |
| Bureau Veritas | Accredited certification body | $15K–$50K (published planning range, Sept 2026) | 4–9 mo |
| NSF | Accredited certification body | $10K–$30K (published planning range, Sept 2026) | 3–6 mo |
| DEKRA | Accredited certification body | $15K–$50K (published planning range, Sept 2026) | 4–9 mo |
| TÜV Rheinland | Accredited certification body | $15K–$50K (published planning range, Sept 2026) | 4–9 mo |
| Kiwa | Accredited certification body | $10K–$35K (published planning range, Sept 2026) | 3–6 mo |
| Schellman | ANAB-accredited ISO 27001 certification body | $15K–$50K (published planning range, Sept 2026) | 4–9 mo |
| A-LIGN | ANAB-accredited ISO 27001 certification body | $15K–$50K (published planning range, Sept 2026) | 4–9 mo |
| DNV | Accredited certification body | $15K–$50K (published planning range, Sept 2026) | 4–9 mo |
| LRQA | Accredited certification body | $15K–$50K (published planning range, Sept 2026) | 4–9 mo |
| TÜV SÜD | Accredited certification body | $15K–$50K (published planning range, Sept 2026) | 4–9 mo |
Planning ranges are not quotes. See our methodology for how prices are labeled and verified.
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