Salience Labs
Salience Labs is a UK-based silicon photonics company developing all-optical Optical Circuit Switches (its OC-32M 32-port module and 64/128-port variants) for AI datacenter back-end networks, sold to hyperscalers and AI infrastructure operators via direct enterprise sales and manufactured in partnership with Tower Semiconductor.
- Company typePrivate
- Founded2021
- HeadquartersOxford, United Kingdom
- Headcount51–100
- GTM typeB2B
- OfferingHardware or Manufacturing
What Salience Labs does
Salience Labs Limited is a privately held, venture-backed semiconductor company founded in 2021 and headquartered in Milton Park, Oxfordshire, with additional offices in Heidelberg, Germany, and Los Angeles, California. The company develops silicon photonics-based all-optical Optical Circuit Switches (OCS) targeted at AI datacenter back-end networks. Its flagship product, the OC-32M, is a 32-port non-blocking solid-state all-optical switch module that eliminates optical-electrical-optical conversions, delivering sub-10 nanosecond port-to-port latency, sub-1W per port power consumption, and support for interface rates from 50 Gbps NRZ to 200 Gbps PAM4. The architecture integrates a Photonic IC for switching and amplification, driving electronics, firmware, and standard fiber connectors (O-band 1310 nm, compatible with DR optics), with up to eight modules fitting in a single 1RU chassis. 64- and 128-port variants are in development.
The company's primary customer segment is AI datacenter operators and hyperscalers building large-scale training and inference clusters, with secondary reach into system integrators and equipment OEMs evaluating OCS for next-generation datacenter fabrics. Salience Labs has no publicly disclosed customers or revenue and engages prospects through quote-based enterprise sales, providing full 1RU evaluation platforms for customer development. Manufacturing is delivered via a partnership with Tower Semiconductor using its PH18DA and TPS45PH silicon photonics platforms, which entered pre-production in February 2026. The company has raised approximately $41.5 million in disclosed funding (an $11.5M seed in May 2022 and a $30M Series A in February 2025), with additional undisclosed strategic capital from Oman Investment Authority in September 2025, and was selected into the Future Fifty UK scaleup cohort in March 2025. The company is led by co-founders Vaysh Kewada (CEO) and Johannes Feldmann (CTO), with a board chaired by Dan Armbrust.
Salience Labs firmographics
Firmographics- Name
- Salience Labs
- Legal name
- Salience Labs Limited
- Website
- https://saliencelabs.ai
- Company type
- Private
- Founded year
- 2021
- Operating status
- Operating
- Headcount range
- 51–100 employees
- Short description
- Salience Labs is a UK-based silicon photonics company developing all-optical Optical Circuit Switches (its OC-32M 32-port module and 64/128-port variants) for AI datacenter back-end networks, sold to hyperscalers and AI infrastructure operators via direct enterprise sales and manufactured in partnership with Tower Semiconductor.
- Ownership category
- akta.pro rank
Salience Labs industry classification
Industry- Product category
- Optical Networking Equipment
- NAICS
- Semiconductor and Other Electronic Component Manufacturing (33441), Semiconductor Machinery Manufacturing (333242), Fiber Optic Cable Manufacturing (335921), Other Communications Equipment Manufacturing (33429)
- SIC
- Semiconductors & Related Devices (3674), Communications Equipment, Nec (3669)
- akta.pro primary industry
- Optoelectronic Receivers & Transceivers (Photodetectors/Optical Modules) (HDAHALAM)
- akta.pro secondary industries
- Interface ICs (USB/HDMI/SerDes/Level Shifters) (HDAHAIAD), Active Optical Cables (AOC) & Optical Interconnects (HDAFAEAG)
Keywords
Where Salience Labs is headquartered
LocationHeadquarters
- HQ city
- Oxford
- HQ country
- United Kingdom
- HQ region
- Europe
Offices3 records
Markets served
Salience Labs business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Technology or R&D, Personnel, Supply Chain, Operations, Marketing or Sales, Infrastructure
Revenue model
- Hardware sales — Optical switch modules and evaluation platforms: Revenue from sale of OC-32M all-optical switch modules and full evaluation platforms (1RU boxes) packaged for customer development. Includes Photonic ICs, electronic control, firmware, and peripherals. Sold primarily to AI datacenter operators/enterprises. Pricing not publicly disclosed; quote-based engagement.
- Manufacturing partnership revenue (Tower Semiconductor): Revenue tied to at-scale PIC manufacturing via Tower Semiconductor silicon photonics platforms (PH18DA and TPS45PH) moving from development to pre-production phase for AI datacenter deployments.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Unit Pricing | Pay-as-you-go | OC-32M all-optical switch module (32-port) and evaluation platform — quote-based |
Go-to-market motion1 record
Distribution channels3 records
Marketing channels4 records
Salience Labs product offering
Product offeringCore offering
Salience Labs designs and manufactures silicon photonics-based all-optical (Optical Circuit Switching, OCS) switch modules for AI datacenter back-end networks. Its flagship product, the OC-32M, is a 32-port non-blocking solid-state optical switch that eliminates optical-electrical-optical conversions, integrating Photonic ICs, driving electronics, firmware, and standard fiber connectors into a single 1RU module. The company also offers evaluation platforms and is developing 64- and 128-port variants for next-generation AI datacenter deployments.
Product overview
Salience Labs offers a single integrated silicon photonics product platform centered on the OC-32M all-optical switch module — a 32-port non-blocking optical circuit switch (OCS) designed for AI datacenter back-end networks. Built on the company's proprietary silicon photonics technology (over 10 years of research), the platform integrates a Photonic IC for switching and amplification, driving electronics, firmware, and standard fiber connectors into a 1RU form factor, with up to 8 OC-32M modules combinable for higher density. The broader product suite extends this same architecture to 64-port and 128-port variants currently in development. Supporting offerings include the OC-32M Evaluation Platform, which packages the silicon photonic ICs, electronic control, firmware, and peripherals into a 1RU box for customer evaluation, and a Keysight Technologies co-developed optical circuit switch testing environment for validating the OC-32M's performance.
Differentiator
Problem solved
Functional benefit
Products and services
- OC-32M All-Optical Switch Module Salience Labs' flagship silicon photonics-based 32-port non-blocking all-optical switch module that eliminates the need for costly, power-hungry optical transceivers used in conventional electrical switches. Delivers <10 ns port-to-port latency, <2 dB total insertion loss, <300 µs reconfiguration time, <1 W per port power, and supports interface rates from 50 Gbps NRZ to 200 Gbps PAM4 per fiber (O-band 1310 nm). Integrates a Photonic IC (PIC) for switching and amplification, driving electronics, firmware stack, and standard fiber connectors, with up to 8 modules fitting in a single 1RU chassis. Sold to AI datacenter operators and equipment OEMs.
- OC-32M Evaluation Platform Full 1RU customer evaluation and development platform that packages Salience Labs' silicon photonic ICs, electronic control, firmware, and peripherals for prospective customers to test the OC-32M all-optical switch module.
Quantifiable outcome
- Up to 80% reduction in network latency measured in Tokens per Second/User (TPS/User)
- +5 more outcomes
Companies that use Salience Labs
Customer profileSegments2 records
Ideal customer profiles2 records
Salience Labs technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Integration2 records
Feature6 records
Salience Labs partnerships and signals
Strategic signalScale indicators7 records
Recent moves6 records
Expansion highlights6 records
Salience Labs competitors and assessment
Company assessmentDirect peers
- Celestial AI: Silicon photonics startup building an optical fabric (Photonic Fabric) for AI accelerator interconnects. Direct competitor in optical switching for AI back-end networks with a comparable deep-tech profile and hyperscaler target customers.
- Lightmatter: Photonics-based computing and interconnect company targeting AI datacenters with photonic processors and interconnect fabric. Direct peer addressing the same AI data movement bottleneck using silicon photonics.
- Ayar Labs: Optical I/O chiplet company using silicon photonics to provide high-bandwidth, low-latency optical interconnect for AI and HPC workloads. Directly comparable in technology stack and AI datacenter go-to-market.
- POET Technologies: Integrated photonics company developing optical interposer-based solutions for data communications. Comparable as a silicon photonics platform player targeting datacenter networking and AI applications.
Broad incumbents
- Cisco: Dominant incumbent in datacenter networking with broad optical switching and routing portfolio (Cisco Silicon One, Nexus, Optical). Competes indirectly via established electrical/optical switch platforms that Salience's OCS aims to displace in AI back-end fabrics.
- Broadcom: Leading supplier of switching ASICs (Tomahawk, Trident) and optical components for hyperscale datacenters. Represents the dominant electrical-switching roadmap against which Salience's all-optical approach must win AI back-end design-ins.
- Marvell Technology: Major supplier of switching silicon, DSPs, and optical interconnect for cloud datacenters. Indirect competitor whose high-radix electrical switch and coherent optics roadmaps compete with Salience's OCS value proposition.
- Juniper Networks: Hyperscale-focused networking vendor (QFX, PTX series) with growing optical and silicon photonics initiatives. Indirect competitor targeting the same AI datacenter networking refresh cycle.
- Coherent (formerly II-VI): Large-scale vertically integrated photonics and optical components company serving datacenter and telecom markets. Indirectly comparable as a silicon photonics platform and optical component incumbent adjacent to Salience's TAM.
- Lumentum: Optical components and laser supplier (formerly JDSU) with strong presence in datacenter transceivers and emerging silicon photonics initiatives. Indirectly comparable as a component-level incumbent in optical networking for AI/cloud infrastructure.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat5 records
Key risks6 records
Key highlights7 records
Customer concentration
Salience Labs social profiles
Digital presenceSalience Labs financial estimates
Financial estimateRevenue estimate
Valuation estimate
Salience Labs leadership team
Management profileNumber of profiles
Profiles10 records
Salience Labs funding detail
Funding detailFunding overview
Funding rounds5 records
Investors12 records
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Salience Labs M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Salience Labs
What does Salience Labs do?
Salience Labs designs and manufactures silicon photonics-based all-optical (Optical Circuit Switching, OCS) switch modules for AI datacenter back-end networks. Its flagship product, the OC-32M, is a 32-port non-blocking solid-state optical switch that eliminates optical-electrical-optical conversions, integrating Photonic ICs, driving electronics, firmware, and standard fiber connectors into a single 1RU module. The company also offers evaluation platforms and is developing 64- and 128-port variants for next-generation AI datacenter deployments.
Is Salience Labs a public or private company?
Salience Labs is a private company. It is classified as venture growth investor backed and is currently operating.
When was Salience Labs founded?
Salience Labs was founded in 2021. It employs 51 to 100 people.
Where is Salience Labs based?
Salience Labs is headquartered in Oxford, United Kingdom, in the Europe region.
How does Salience Labs make money?
Two revenue lines are on record. Hardware sales — Optical switch modules and evaluation platforms are the primary driver. The others are manufacturing partnership revenue (Tower Semiconductor).
Who are Salience Labs's main competitors?
Direct peers on record are Celestial AI, Lightmatter, Ayar Labs and POET Technologies. Broad incumbents are Cisco, Broadcom, Marvell Technology, Juniper Networks, Coherent (formerly II-VI) and Lumentum.
Does Salience Labs have an API?
No public API is recorded for Salience Labs.
What industry is Salience Labs in?
Salience Labs's product category is Optical Networking Equipment. Its primary akta.pro industry code is HDAHALAM, Optoelectronic Receivers & Transceivers (Photodetectors/Optical Modules), with a secondary code of HDAHAIAD, Interface ICs (USB/HDMI/SerDes/Level Shifters). Its NAICS code is 33441 and its SIC code is 3674.