What OpenTitan Project does

OpenTitan is an open-source silicon Root of Trust (RoT) project administered by lowRISC CIC, a UK-based not-for-profit Community Interest Company headquartered in Cambridge. Founded in 2018 by Google and lowRISC, the project develops commercial-grade, security-certified hardware RoT designs distributed under the permissive Apache 2.0 license. Its portfolio centers on two top-level designs: Earl Grey, a discrete low-power secure microcontroller, and Darjeeling, a Secure Execution Environment optimized for integration within larger SoCs, ASICs, and multi-die chiplet architectures. Underlying components include the Ibex 32-bit RV32IMCB RISC-V processor core, the OTBN programmable cryptographic coprocessor with 256-bit datapath and upcoming SIMD extensions, and a comprehensive suite of cryptographic IP blocks (AES, HMAC/SHA2, KMAC/SHA3, CSRNG) with built-in side-channel analysis and fault-injection countermeasures. The codebase spans 446,000+ lines of SystemVerilog verified through 40,000+ nightly regression tests with over 90% functional, code, and assertion coverage.

The project is designed for certification compliance targeting US Government FIPS 140-3, Common Criteria EAL 4+ with PP-0084 and AVA_VAN.5, FIDO U2F, and TPM profiles, and includes hardware-accelerated post-quantum cryptography (SLH-DSA secure boot, ML-KEM, ML-DSA). Its business model combines tiered annual membership fees (Gold, Silver, Bronze, Tools, Academic/NGO) granting governance influence and integration support, with lowRISC CIC's professional engineering consultancy services for custom deployments and trademark/certification services for compliant implementations. OpenTitan has achieved its first high-volume commercial production deployment as the plan-of-record hardware security chip in Google Chromebooks (March 2026), with Nuvoton Technology Corporation as manufacturing partner, and has expanded into integrated SoC deployments through a partnership with Rivos Inc (October 2025).

Name

OpenTitan Project

Legal name

OpenTitan Project

Website

https://opentitan.org

Company type

Private

Founded year

2018

Operating status

Operating

Short description

OpenTitan is an open-source silicon Root of Trust project stewarded by UK non-profit lowRISC CIC, providing commercial-grade RISC-V-based security IP (Earl Grey, Darjeeling) to hyperscalers, SoC designers, and OEMs, now in production via Google Chromebooks.

Ownership category

akta.pro rank

Product category

Silicon Root of Trust IP

NAICS

Scientific Research and Development Services (5417), Other Computer Related Services (541519), Software Publishers (5132), Computer Systems Design and Related Services (54151)

SIC

Patent Owners & Lessors (6794)

akta.pro primary industry

Remote Access & Privileged Access for OT (ZTA/PAM for Vendors) (HDADAJAG)

Keywords

• Open-source silicon
• Root of trust
• Hardware security
• RISC-V processors
• Cryptographic IP blocks

Headquarters

HQ city

Cambridge

HQ country

United Kingdom

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Software

Cost components

Personnel, Technology or R&D, Infrastructure, Operations, Marketing or Sales

Revenue model

1. Membership Fees: OpenTitan generates revenue through tiered membership programs (Gold, Silver, Bronze, Tools, Academic/NGO). Member fees fund project infrastructure, compliance, governance, community support, quality assurance, and roadmap development. Gold members receive seats on Governing Board and Technical Committee; Silver members receive Technical Committee seat; Bronze members support the project with logo placement.
2. Professional Engineering Services: lowRISC CIC offers formal professional engineering consultancy services for custom OpenTitan deployments under standard framework services agreements. Services include secure hardware design, support and maintenance tailored to specific certification goals.
3. Certification and Trademark Services: lowRISC CIC provides OpenTitan certification and trademark services, including Common Criteria certification support, security hardening certification, and trademark certification for compliant implementations.

Pricing tiers

Go-to-market motion2 records

Distribution channels3 records

Marketing channels7 records

Core offering

OpenTitan develops and distributes open-source silicon Root of Trust (RoT) designs, IP blocks, and documentation under Apache 2.0 license. The project delivers two top-level configurations—Earl Grey (discrete secure microcontroller chip) and Darjeeling (integrated SoC secure execution environment)—along with the Ibex RISC-V processor core, OTBN cryptographic coprocessor, and a suite of cryptographic IP blocks. Revenue is generated through tiered corporate membership fees (Gold, Silver, Bronze, Tools, Academic/NGO), professional engineering consultancy, and certification/trademark licensing services administered by lowRISC CIC.

Product overview

OpenTitan is an open-source silicon Root of Trust project administered by lowRISC CIC that provides commercial-grade, security-certified open IP for instantiation as secure silicon products. The portfolio centers on two top-level configurations: Earl Grey (discrete Root of Trust chip) and Darjeeling (integrated Secure Execution Environment). Key components include the Ibex RISC-V processor core, OTBN cryptographic coprocessor, and a comprehensive suite of cryptographic IP blocks (AES, HMAC/SHA2, KMAC/SHA3, CSRNG). The project provides modular IP blocks designed as comportable components suitable for inclusion in compliant SoC designs, along with Device Interface Function (DIF) libraries for software development. All designs are verified through automated continuous integration with over 40,000 nightly regression tests and are distributed under Apache 2.0 license.

Differentiator

Problem solved

Functional benefit

Brands

• Earl Grey: The OpenTitan Earl Grey chip is a low-power secure microcontroller designed for several use cases requiring hardware security. It is the discrete Root of Trust layout.
• Darjeeling

Products and services

• Earl Grey (Discrete Root of Trust Chip) Low-power secure microcontroller designed as a discrete Root of Trust chip featuring the RISC-V Ibex processor, OTBN cryptographic coprocessor, AES-128/192/256, HMAC/SHA2-256, RSA up to 4K, ECC (NIST P256/P384, Brainpool, X25519/Ed25519), CSRNG, Key Manager with DICE support, 2x512KiB eFlash, 128KiB SRAM, and 32KiB ROM. Targeted at platform integrity, TPM, and U2F security key applications.
• Darjeeling (Secure Execution Environment) System-on-a-chip Secure Execution Environment optimized to be integrated as a hardware security block within larger SoC, ASIC, and multi-die chiplet architectures. Serves as an RoT for measurement and attestation. Features 32-bit SIMD vector extensions for OTBN, DMA controller, 9x DOE Mailboxes, PCIe Data Object Exchange support, and high-speed and peripheral clock domains.
• Ibex RISC-V Processor Core 32-bit RISC-V processor core (RV32IMCB) with 3-stage pipeline, single-cycle multiplier, 4 KiB instruction cache, enhanced Physical Memory Protection (ePMP), data-independent timing, and dual-core lockstep configuration. Production-grade IP distributed under Apache 2.0 license for use as a building block in security-critical designs.
• OTBN (OpenTitan Big Number Accelerator) Programmable cryptographic coprocessor with 256-bit datapath providing hardware acceleration for asymmetric cryptographic algorithms including RSA, elliptic curve cryptography (ECC), and post-quantum lattice-based algorithms (ML-DSA, ML-KEM). Includes 32-bit SIMD vector extensions for polynomial arithmetic, achieving six- to nine-fold efficiency improvement for post-quantum cryptography.
• Cryptographic IP Blocks Suite of hardware cryptographic accelerators including AES (all standard modes), HMAC/SHA2 family (SHA2-256/384/512), KMAC/SHA3 family (SHA3, cSHAKE), CSRNG (cryptographically secure random number generator), and entropy source with FIPS/CC-compliant health checks. Modular IP blocks designed for composition in compliant SoC designs.

Quantifiable outcome

• 33,300+ commits demonstrating sustained development activity and community engagement
• +2 more outcomes

Named customers2 records

Segments4 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

AI capability3 records

Feature6 records

Partnerships

Four partnerships are on record, tiered core.

• Rivos InccoreStrategic or Co-development Partner · 1 October 2025Rivos Inc announced the successful secure provisioning of Darjeeling-based Root of Trust during SoC production in October 2025. This demonstrates OpenTitan's capability for integrated SoC deployments and validates the Darjeeling secure execution environment design.
• Nuvoton Technology CorporationcoreOEM/ Whitelabel/ Licensing Partner · 1 May 2024Nuvoton developed the first commercial chip built on the OpenTitan open source secure silicon design, announced May 2024. Nuvoton announced plans to use OpenTitan-based security chip as next-generation security solution for Chromebooks. The partnership achieved validated silicon and production availability for the commercial OpenTitan-based security chip.
• lowRISC CICcoreStrategic or Co-development PartnerlowRISC CIC is the independent not-for-profit steward of OpenTitan. It employs a dedicated full-stack engineering team, maintains project governance, provides professional engineering services, and manages trademark certification. Founded specifically to develop and maintain open source silicon designs and tools for the long term.
• GooglecoreStrategic or Co-development PartnerGoogle launched the OpenTitan project together with lowRISC in 2018 with the goal of creating a completely transparent and trustworthy secure silicon platform. Google serves as the founding partner and first major commercial adopter, deploying OpenTitan silicon in Chromebooks as the plan-of-record hardware security chip.

Scale indicators9 records

Recent moves6 records

Expansion highlights6 records

Emerging players

• SiFive: Commercial RISC-V IP and core provider offering SiFive Shield Extensions for security, partially overlapping with OpenTitan's open RoT mission but with proprietary licensing and higher commercial velocity.
• wolfSSL: Provider of embedded TLS/crypto library stack often paired with hardware RoT chips. Complementary rather than directly competing with OpenTitan silicon, but addresses overlapping security use cases in firmware layers.

Broad incumbents

• Rambus: Security IP vendor offering hardware Root of Trust, cryptographic cores, and PQC accelerator IP under commercial licensing. Direct competitor in the certified RoT IP market.
• Synopsys (DesignWare Security IP): Broad EDA and IP vendor offering certified hardware Root of Trust, cryptographic accelerators, and security subsystems. Competes with OpenTitan in enterprise SoC security IP, but as part of a much larger portfolio.
• Cadence (Tensilica Security IP): EDA/IP incumbent offering security subsystems, cryptographic accelerators, and pre-verified RoT IP blocks. Comparable as commercial RoT IP vendor but proprietary and bundled with broader design tools.

Direct peers

• Secure-IC: Specialist provider of certified hardware security IP including Root of Trust, PQC accelerators, and side-channel analysis tooling. Closest direct commercial analog to OpenTitan's scope.

Others

• RISC-V International: Non-profit consortium governing the RISC-V open ISA, which OpenTitan's Ibex core implements. Directly comparable as open-source hardware stewards but focused on ISA standardization rather than RoT IP delivery.
• lowRISC CIC: UK not-for-profit Community Interest Company that stewards OpenTitan. Effectively the operating entity behind the project; included for completeness as the parent steward rather than as an external peer.
• Nuvoton Technology Corporation: Manufacturing partner that produces OpenTitan-based silicon chips for Chromebooks. Adjacent ecosystem participant serving as foundry/fab partner rather than direct IP competitor.

Regional players

• Andes Technology: RISC-V processor IP vendor with security extensions, primarily serving Asian semiconductor customers. Provides commercial alternative to OpenTitan's Ibex core with regional market focus.

Market position

Competitive moat6 records

Key risks1 record

Key highlights6 records

Customer concentration

• GitHubgithub.com/lowRISC/opentitan

Compliance5 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about OpenTitan Project