Rock Solid Knowledge

Name

Rock Solid Knowledge

Legal name

Rock Solid Knowledge Ltd.

Website

https://rocksolidknowledge.com

Company type

Private

Founded year

2009

Operating status

Operating

Headcount range

11–50 employees

Ownership category

akta.pro rank

Headquarters

HQ city

Bristol

HQ country

United Kingdom

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Software

Cost components

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

Revenue model

1. Web Development Services: Custom website development using Umbraco CMS, web development, and mobile development services. The company builds secure, high-performance solutions that connect content and systems for clients.
2. Umbraco Hosting: Hassle-free, low-cost hosting with Umbraco Cloud and Azure for deployed websites.
3. IdentityServer Products: Products, components, and services for Open.IdentityServer and Duende IdentityServer including single sign-on solutions.
4. OpenIddict Components: Commercially supported OpenIddict products and components including SAML support.
5. Developer Training: Deep technical instructor-led training for .NET, Modern Web Development, Java and Python. Courses include Solid Async Programming, Solid Patterns, and Solid .NET.

Go-to-market motion1 record

Distribution channels5 records

Marketing channels6 records

Core offering

Rock Solid Knowledge is a UK-based software development agency that delivers custom web and mobile applications built on Umbraco CMS, alongside proprietary identity management products (IdentityServer.com for Open.IdentityServer/Duende IdentityServer and OpenIddict Components). They provide Umbraco Gold Partner development services, complex CMS migrations and upgrades, secure integrations, hosted environments on Umbraco Cloud/Azure, and instructor-led .NET and modern web development training for corporate engineering teams.

Product overview

Rock Solid Knowledge is a web development agency that combines consulting services with proprietary products. Their service portfolio includes Umbraco CMS development (as an official Gold Partner), web development, mobile development, and security services. They complement their services with two software products: IdentityServer.com (products and services for Open.IdentityServer and Duende IdentityServer) and OpenIddict Components (commercially supported OpenIddict AdminUI and SAML2P). They also offer developer training courses covering .NET, async programming, and design patterns.

Differentiator

Problem solved

Functional benefit

Brands

• IdentityServer.com: Products, components, and services for Open.IdentityServer and Duende IdentityServer, including single sign-on solutions and support.
• OpenIddict Components

Products and services

• Umbraco CMS Development
• Web Development
• Mobile Development
• Security Services
• Developer Training
• IdentityServer.com
• OpenIddict Components

Quantifiable outcome

• 18% year-on-year reduction in carbon emissions (2024/25 vs baseline 2022/23)
• +4 more outcomes

Named customers15 records

Segments3 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration3 records

AI capability3 records

Feature3 records

Partnerships

Seven partnerships are on record, tiered flagship, core and minor.

• UmbracoflagshipStrategic or Co-development Partner · 18 September 2025Rock Solid Knowledge is an official Umbraco Gold Partner and Contributing Gold Partner. They work closely with Umbraco HQ, contribute to Umbraco CMS core code through the Core Collaborators team, co-organise umBristol meetups, sponsor Umbraco Spark, and have helped host community events. The partnership was strengthened when Umbraco opened a new Bristol office in September 2025.
• Woodland Fund PortfoliocoreOthers · 1 July 2024Carbon offset partnership through Woodland Fund Portfolio supporting verified nature-based reforestation projects in biodiversity hotspots worldwide. For 2024/25, 75% of offsetting goes to UK hay meadow restoration and 25% to sea grass restoration.
• St John AmbulanceminorStrategic or Co-development Partner · 11 June 2024Partnership for AED and CPR training for employees. St John Ambulance provided practical, workplace-focused training covering cardiac emergencies, CPR techniques, and AED device usage.
• Olympus TrustminorStrategic or Co-development Partner · 5 February 2024Local Bristol trust supporting staff and students of over 16 local schools. Rock Solid Knowledge donated excess office furniture (desks, chairs, whiteboards, appliances) when downsizing their office space.
• SOS PropertyminorStrategic or Co-development Partner · 21 December 2023Organisation dedicated to aiding refugees. Rock Solid Knowledge donated four laptops through SOS Property to support refugees in gaining access to educational resources and immigration services.
• MotherBoardminorStrategic or Co-development Partner · 21 December 2023Community for parents working in tech. Rock Solid Knowledge partnered with MotherBoard to develop inclusive parental leave policies, breastfeeding rooms, and return-to-work programmes.
• Microsoft/AzurecoreTechnology or IntegrationUmbraco Cloud is built on Microsoft Azure, providing infrastructure, performance, and security foundations. Rock Solid Knowledge offers hosting on Umbraco Cloud and Azure as part of their service offerings.

Scale indicators6 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• evolt: Swedish Umbraco Gold Partner with Contributing Partner status delivering Umbraco development, design and digital strategy. Directly comparable as a peer-tier Umbraco specialist agency with similar community contribution profile.
• Moriyama: Dutch Umbraco Gold Partner providing Umbraco CMS development, hosting and digital services. Comparable as a European Umbraco specialist competing for cross-border enterprise engagements.
• CTI Digital: UK Umbraco Gold Partner providing Umbraco development, hosting and broader digital transformation services. Comparable in client base (enterprise, public sector, regulated industries) and platform specialisation.
• Make (formerly Known Unknown): Danish Umbraco Gold Partner with a Contributing profile, offering digital strategy, Umbraco development and creative services. Comparable in Umbraco ecosystem positioning and European client base.
• Cogworks: UK-based Umbraco Gold Partner offering CMS development, hosting and digital experience services. Directly comparable as a similarly sized UK Umbraco agency competing for the same enterprise and mid-market CMS engagements.
• NetConstruct: UK Umbraco partner agency specialising in Umbraco CMS implementations, web development and identity integration. Overlaps with RSK on Umbraco delivery model and .NET/IdentityServer technical stack.

Regional players

• BVN: Norwegian Umbraco Gold Partner delivering Umbraco development and digital experience services in the Nordics. Comparable as a regional Umbraco specialist with similar service mix, though operating in a different geography.
• Westbrook International: UK Umbraco Gold Partner providing Umbraco CMS development and digital services primarily to UK enterprise and public-sector clients. Comparable in Umbraco specialisation and UK enterprise customer base.

Broad incumbents

• Duende Software: Commercial entity founded by the original IdentityServer creators, providing Duende IdentityServer and related identity/SSO products. Overlaps directly with RSK's IdentityServer.com business on the commercial side and shapes the open-source fork dynamics RSK must navigate.
• Clearleft: UK-based digital agency offering UX, design and web development services to enterprise clients. Comparable as a UK agency competing for similar mid-market and enterprise digital engagements, though without Umbraco specialisation.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks5 records

Key highlights6 records

Customer concentration

• Xx.com/rskltd
• YouTubeyoutube.com/@rocksolidknowledge9590
• LinkedInlinkedin.com/company/rock-solid-knowledge-ltd

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles6 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 Rock Solid Knowledge