CISO Tribune

Vendor comparison · 2 companies

DigiCert vs Red Sift

DigiCert ONE is a platform that includes Trust Lifecycle Manager for organizations that require CA-agnostic certificate lifecycle management. Red Sift helps security and IT teams embrace the security protocols that keep the internet safe, such as DMARC, SPF, DKIM and TLS. CISO Tribune files both under Machine identity and PKI and Email authentication and DMARC. This page sets the two records side by side: what each sells, where it is based, who owns and funds it, the customers it names and its recent news, each fact numbered to its source.

Change the companies

Up to four companies side by side.

  • DigiCert
  • Red Sift
DigiCert vs Red Sift: Products, Customers and Funding Compared
DigiCertDigiCert ONE is a platform that includes Trust Lifecycle Manager for organizations that require CA-agnostic certificate lifecycle management.digicert.comRed SiftRed Sift helps security and IT teams embrace the security protocols that keep the internet safe, such as DMARC, SPF, DKIM and TLS.redsift.com
What it sells
  • AI Trust Manager[1][8]Helps organizations discover, secure, and govern AI agents, AI models, and MCP servers.
  • CertCentral[1][3]Used to order and administer DigiCert certificates.
  • Private CA[1][7]DigiCert's Private CA solutions are pointed to strictly internal use cases.
  • DigiCert X9 PKI[7]A dedicated public key infrastructure for interoperability and flexibility for non-web browsers.
  • Red Sift OnDMARC[2][9]Email authentication product for DMARC enforcement.
Categories
Headquarters
Not stated on its pagesLondon, United Kingdom[5][6]
Founded
Not stated on its pages2015[3]
Ownership and funding
Not stated on its pagesPrivately held[2][4][15]
Named customers
Not stated on its pagesNot stated on its pages
Recent news
  • September 24, 2026DigiCert announced general availability of Quantum Central, a DigiCert ONE platform offering that helps organizations manage progress toward post-quantum cryptography readiness.[12]
  • October 21, 2026Red Sift notified customers with potentially affected hosts after scanning the Hardenize customer base for PHP-backed hosts, following the PHP security fixes.[18]
G2 and Gartner Peer Insights
  • G2: Not stated on its pages
  • Gartner Peer Insights: Not stated on its pages
  • G2: listed, seen November 4, 2026[15]
  • Gartner Peer Insights: Not stated on its pages
Who it fits
X9 PKI is aimed at host-to-host communications (mTLS) involving multiple organizations. DigiCert issues ZertES certificates for organizations and individuals that require legally recognized digital trust under Swiss law. Trust Lifecycle Manager is described for organizations that require CA-agnostic certificate lifecycle management. DigiCert AI Trust Manager is described for organizations that need to discover, secure, and govern AI agents, AI models, and MCP servers. CertCentral Europe is hosted in European data centers for customers with data residency and sovereignty requirements.From its own pages, the company sells mainly to security and IT teams that want to adopt protocols such as DMARC, SPF, DKIM and TLS. Save the Children also appears as a customer story for OnDMARC. The about page says the company works across EMEA, APAC and the US.
Last verified
November 5, 2026September 27, 2026

Where they overlap

  • DigiCert and Red Sift are both filed under Machine identity and PKI and Email authentication and DMARC.

Where they differ, field by field

  • DigiCert's primary category is Machine identity and PKI; Red Sift's is Email authentication and DMARC.
  • DigiCert is also filed under Post-quantum cryptography and DNS security. Red Sift is also filed under External attack surface management and Digital risk protection.
  • DigiCert lists AI Trust Manager, CertCentral, Private CA and DigiCert X9 PKI. Red Sift lists Red Sift OnDMARC.
  • Red Sift is headquartered in London, United Kingdom.
  • Red Sift was founded in 2015.
  • Red Sift is privately held.

What it sells: DigiCert

What AI Trust Manager does[1][8]
DigiCert AI Trust Manager assigns each AI agent a cryptographically verifiable AI Agent Passport linked to its organizational and human ownership. DigiCert AI Trust Manager verifies AI model integrity from development through deployment and runtime. DigiCert AI Trust Manager protects AI agents, AI models, and MCP servers, as well as the systems, tools, and data they access.
What CertCentral does[1][3]
DigiCert certificates can be ordered and administered through CertCentral Europe. CertCentral Europe is hosted in European data centers to address data residency and sovereignty requirements. CertCentral Europe is part of the DigiCert ONE platform.
What DigiCert X9 PKI does[7]
DigiCert X9 PKI is a dedicated public key infrastructure designed to provide interoperability and flexibility for non-web browsers. DigiCert X9 PKI operations are governed by an ASC X9 Policy Committee and undergo an annual independent WebTrust audit. Organizations with existing PKI systems can cross-certify with the X9 PKI root. The X9 PKI is intended for non-browser TLS authentication scenarios.

What it sells: Red Sift

What Red Sift OnDMARC does[2][9]
Red Sift OnDMARC gives instant visibility into a domain's email security posture and a clear path to DMARC enforcement. It lets customers configure SPF, DKIM, DMARC, BIMI and MTA-STS in one place. Red Sift says it helps organizations reach full DMARC enforcement in just 6 to 8 weeks.

Questions about DigiCert and Red Sift

What do DigiCert and Red Sift sell?
DigiCert sells AI Trust Manager, CertCentral, Private CA and DigiCert X9 PKI. Red Sift sells Red Sift OnDMARC.
Are DigiCert and Red Sift in the same category?
They share Machine identity and PKI and Email authentication and DMARC. DigiCert's primary category is Machine identity and PKI and Red Sift's is Email authentication and DMARC.
Where are DigiCert and Red Sift headquartered?
Red Sift is headquartered in London, United Kingdom.
When were DigiCert and Red Sift founded?
Red Sift was founded in 2015.
Who owns DigiCert and Red Sift?
Red Sift is privately held.
Who are DigiCert and Red Sift sold to?
X9 PKI is aimed at host-to-host communications (mTLS) involving multiple organizations. From its own pages, the company sells mainly to security and IT teams that want to adopt protocols such as DMARC, SPF, DKIM and TLS.
What have DigiCert and Red Sift announced recently?
September 24, 2026: DigiCert announced general availability of Quantum Central, a DigiCert ONE platform offering that helps organizations manage progress toward post-quantum cryptography readiness. October 21, 2026: Red Sift notified customers with potentially affected hosts after scanning the Hardenize customer base for PHP-backed hosts, following the PHP security fixes.

About DigiCert

DigiCert ONE is a platform that includes Trust Lifecycle Manager for organizations that require CA-agnostic certificate lifecycle management. CertCentral Europe is part of the DigiCert ONE platform. DigiCert ONE is available to customers from global regions including European, Australia, India, Japan, and the United States.[3]

DigiCert certificates can be ordered and administered through CertCentral Europe, which is hosted in European data centers to address data residency and sovereignty requirements. DigiCert signs all SSL certificates using the SHA-256 Algorithm. DigiCert assigns an alphanumeric serial number to each SSL certificate it issues. DigiCert offers identity-validated S/MIME for encryption, signing, and phishing protection. DigiCert describes protecting code signing for software releases.[2][3][4]

Verified Mark Certificates (VMCs) from DigiCert enable organizations to display their registered trademark logo in supported email clients. The BIMI standard requires organizations to have a logo that is a registered trademark so that they can be issued a VMC. DigiCert validates an organization's legal existence and confirms its control over the domain associated with the VMC request using Extended Validation (EV) standards. For a VMC, DigiCert performs additional validation beyond the standard Extended Validation (EV) certificate process. DigiCert validates that the SVG logo complies with BIMI requirements and exactly matches the registered trademark. The individual requesting a VMC must be verified as an authorized representative of the organization. Once approved, DigiCert issues the Verified Mark Certificate.[5][6]

DigiCert X9 PKI is a dedicated public key infrastructure designed to provide interoperability and flexibility for non-web browsers. DigiCert X9 PKI operations are governed by an ASC X9 Policy Committee and undergo an annual independent WebTrust audit. X9 PKI was born from the financial services industry’s need for a dedicated, interoperable trust framework. The X9 PKI is intended for non-browser TLS authentication scenarios. Its main use case at the outset is mutual TLS (mTLS) among financial institutions and between them and their partners and customers. Organizations with existing PKI systems can cross-certify with the X9 PKI root. DTCC will require X9 PKI certificates for securing connections to IBM MQ, Connect:Direct, and FTPS.

DigiCert is a Qualified Trust Service Provider issuing digital certificates under EU and national trust frameworks, including eIDAS, PKIoverheid (Netherlands), and ZertES (Switzerland). DigiCert issues eIDAS qualified certificates, and the available certificate types include QWACs for PSD2, as well as qualified electronic signatures, seals, and timestamps. DigiCert issues PKIoverheid qualified certificates for personal organizations, professionals, and citizens. DigiCert issues ZertES certificates for organizations and individuals that require legally recognized digital trust under Swiss law. ZertES certificates support qualified and regulated electronic signatures, electronic seals, and qualified timestamps.[3]

DigiCert AI Trust Manager helps organizations discover, secure, and govern AI agents, AI models, and MCP servers. DigiCert AI Trust Manager assigns each AI agent a cryptographically verifiable AI Agent Passport linked to its organizational and human ownership. DigiCert AI Trust Manager verifies AI model integrity from development through deployment and runtime. DigiCert AI Trust Manager protects AI agents, AI models, and MCP servers, as well as the systems, tools, and data they access. DigiCert describes automating passport revocation to enable a real-time kill switch for agentic sessions.[8]

DigiCert says replacing cryptography across systems, software, and devices is a multi-year effort that requires planning, testing, and coordination. DigiCert describes inventorying certificates, keys, endpoints, and libraries across PKI and beyond. DigiCert describes standardizing certificate issuance across disparate certificate authorities. DigiCert offers PQC-ready solutions for digital signatures, PKI, and certificate lifecycle management. DigiCert is active in CA/B Forum, IETF, ETSI, and C2PA. For connected devices, DigiCert describes giving every device a verifiable identity from deployment to retirement. For workloads, DigiCert describes making each workload, API, and container prove its identity. For digital content, DigiCert describes verifying that all digital content is authentic and unaltered.[2][8][9][10][11]

DigiCert on the record

Sources

DigiCert full record

  1. [1]digicert.comDigiCert · digicert.com · undated page, accessed November 5, 2026 · Tier A
  2. [2]TLS/SSL Certificate Authority | Leader in Digital Trust | DigiCertDigiCert · undated page, accessed November 10, 2026 · Tier A
  3. [3]Solutions for the European UnionDigiCert · undated page, accessed November 10, 2026 · Tier A
  4. [4]What extensions and details are included in a SSL certificate?DigiCert · undated page, accessed November 10, 2026 · Tier A
  5. [5]VMC | New validation stepsDigiCert · undated page, accessed November 10, 2026 · Tier A
  6. [6]How to trademark your logo for VMCDigiCert · undated page, accessed November 10, 2026 · Tier A
  7. [7]DigiCert X9 PKI | DigiCertDigiCert · undated page, accessed November 10, 2026 · Tier A
  8. [8]AI Trust Manager | Cryptographic trust for AI | DigiCertDigiCert · undated page, accessed November 10, 2026 · Tier A
  9. [9]Post-Quantum Cryptography Solutions & PQC Readiness | DigiCertDigiCert · undated page, accessed November 10, 2026 · Tier A
  10. [10]Why DigiCert | Unified Digital Trust Leader | DigiCertDigiCert · undated page, accessed November 10, 2026 · Tier A
  11. [11]Trust Calendar: Public Trust & Compliance Changes | DigiCertDigiCert · undated page, accessed November 10, 2026 · Tier A
  12. [12]DigiCert Quantum Central Now Available to Help Organizations Turn PQC Plans into ActionDigiCert · published September 24, 2026 · Tier A

Red Sift full record

  1. [1]redsift.comRed Sift · redsift.com · undated page, accessed September 27, 2026 · Tier A
  2. [2]The Red Sift Pulse PlatformRed Sift · undated page, accessed September 27, 2026 · Tier A
  3. [3]Cloud email security brand protection startup red sift rises 54mSiliconANGLE · siliconangle.com · published February 24, 2022 · Tier B
  4. [4]6977295001Austin American-Statesman · statesman.com · published March 4, 2022 · Tier B
  5. [5]Red sift joins future fifty 2026 cohort unveiled by chancellor at downing streetRed Sift via EIN Presswire · thestarpress.com · published March 19, 2026 · Tier B
  6. [6]Red siftThe Wealth Mosaic · thewealthmosaic.com · undated page, accessed September 27, 2026 · Tier C
  7. [7]Red Sift | Creating a Fundamentally Safer Internet with Proactive SecurityRed Sift · undated page, accessed October 27, 2026 · Tier A
  8. [8]Proactive, intelligent security for every organization.Red Sift · undated page, accessed October 27, 2026 · Tier A
  9. [9]Red Sift OnDMARC | Stop Email Spoofing FastRed Sift · undated page, accessed October 27, 2026 · Tier A
  10. [10]OnDMARC Pricing | Plans for SMB to Enterprise + Free TrialRed Sift · undated page, accessed October 27, 2026 · Tier A
  11. [11]Stop lookalike domains before they damage your brandRed Sift · undated page, accessed October 27, 2026 · Tier A
  12. [12]Bird & Bird strengthens trust in legal communications with layered email and domain protectionRed Sift · undated page, accessed October 27, 2026 · Tier A
  13. [13]Find and fix issues 10x faster with Red Sift RadarRed Sift · undated page, accessed October 27, 2026 · Tier A
  14. [14]Red Sift Certificates Lite | Free Certificate MonitoringRed Sift · undated page, accessed October 27, 2026 · Tier A
  15. [15]Red Sift OnDMARC Reviews 2026: Details, Pricing, & Features | G2G2 · undated page, accessed October 27, 2026 · Tier C
  16. [16]How to Price and Package DMARC Services for Your MSP | Red SiftRed Sift · undated page, accessed November 4, 2026 · Tier A
  17. [17]DMARC solutions for healthcare organizationsRed Sift · undated page, accessed November 4, 2026 · Tier A
  18. [18]Critical PHP vulnerabilities CVE-2026-109618 and CVE-2026-109619 | Red SiftRed Sift · published October 21, 2026 · Tier A

Spot a factual error? Request a correction.