Brief your market
Who could bid the next time SINGLE SOURCE REGULATIONS OFFICE tenders for it services — from published contract awards, not directories. A tender that reaches more proven suppliers gets more bids; more bids is the evidence of value for money.
Ring 1
Proven with you
Suppliers already holding a published SINGLE SOURCE REGULATIONS OFFICE award in this category.
- Risual Ltd2 awards · latest Jul 2023
DefCARS Future Specialist Support
- DEFENCE ECONOMICS LTD2 awards · latest Jul 2023
Single source defence contracting statutory reporting: appraisal and evaluation methodology
- HAMPDEN CONSULTANCY GROUP LTD1 award · latest Mar 2026
Security and Information Risk Advisor (SIRA) services
- Version 1 Solutions Limited1 award · latest Mar 2026
SSRO IT Managed Service (ITMS) and DefCARS contract
- Reed Talent Solutions Limited (trading as Consultancy+)1 award · latest Mar 2025
AI Readiness
- Burendo Limited1 award · latest Mar 2025
Web App
- Thornacre Engineering Limited1 award · latest Mar 2025
Website re-design, development and maintenance
- BRAMBLE HUB LIMITED1 award · latest Jan 2024
IT Managed Service and a Security Operations Centre for the SSRO's technology and systems estate (the ITMS/SOC Service)
- RELX (UK) Ltd1 award · latest Jul 2023
Online Legal Resources
- Hex Security Ltd1 award · latest Jul 2023
Security and information Risk Advisor (SIRA) services
Showing 10 of 12.
Ring 2
Proven with buyers like you
Suppliers who have won this category with other Other buyers — ranked by how many different buyers they've won with. This is the shortlist that widens your field.
- Softcat plc 255 awards · 80 buyers · latest Jul 2026
Purchase of Druva Licenses
- insight Direct (UK) Ltd115 awards · 45 buyers · latest Jul 2026
GB-London: Physical Server Hosting
- Phoenix Software Limited60 awards · 45 buyers · latest Jul 2026
Cloud Security Products
- Deloitte Llp76 awards · 40 buyers · latest Jul 2026
GB-Norwich: Digital Operating Model and Workforce Strategy (HR)
- Microsoft Limited63 awards · 40 buyers · latest Jul 2026
Provision of Microsoft Unified Enterprise Support Services
- Specialist Computer Centres plc81 awards · 34 buyers · latest Jun 2026
Managed Security Operation Centre
- Capgemini Uk Plc86 awards · 32 buyers · latest Jul 2026
VAT PDF and CAS Proxy Service
- Phoenix Software Ltd52 awards · 32 buyers · latest Dec 2025
DDaT25355 - Security Software Consultancy Requirement
- CDW Limited42 awards · 30 buyers · latest Jun 2026
Network Review and Assistance
- Civica Uk Limited47 awards · 29 buyers · latest Feb 2026
Online Migration and Portal Enhancement Services 2025-26
Showing 10 of 6,507.
Ring 3
Proven in the field
Suppliers winning this category anywhere in UK public procurement (excluding those already listed above).
- boxxe Limited137 awards · 76 buyers · latest Jul 2026
ENHT - ClinicalVision Renewal
- Oracle Corporation Uk Limited136 awards · 69 buyers · latest May 2026
Oracle Professional Services
- Trustmarque Solutions Limited102 awards · 67 buyers · latest Jun 2026
Microsoft Azure Licenced Solution Provider 2026
- Kpmg Llp160 awards · 65 buyers · latest Jul 2026
Business Consultancy Services
- Bytes Software Services Limited89 awards · 58 buyers · latest Jul 2026
Microsoft Azure Cloud Services - 25/28
- Pricewaterhousecoopers LLP83 awards · 56 buyers · latest Jul 2026
Implementation of Amazon Connect Platform Licence
- British Telecommunications plc76 awards · 56 buyers · latest Feb 2026
Zscaler Renewal
- Gartner UK limited78 awards · 55 buyers · latest Jun 2026
Executive Program CIO Membership
- IBM United kingdom limited115 awards · 54 buyers · latest Jun 2026
Instana licences 2026/27
- NEC Software Solutions UK Limited70 awards · 54 buyers · latest Jan 2026
GIS Mapping Software
Showing 10 of 14,540.
The full list — for members
All 6,507 Other suppliers in ring 2 (capped at 400, widest-proven first), copyable as a spreadsheet — so every proven supplier can hear about your next tender, not just the usual three.
Sources: published UK contract award notices in the rfp.quest corpus. “Proven” means a citable award — nothing here is inferred or scraped from directories. Award values are not summed because framework ceilings would inflate them.