| Believe Housing Limited EN | North East | in-tend | Weekly | Broken | 0 |
| Bernicia Group EN | North East | in-tend | Weekly | Today | 14 |
| Bexley Council EN | London | generic | Weekly | Pending | 0 |
| Beyond Housing Limited EN | Yorkshire and the Humber | in-tend | Weekly | Today | 21 |
| Blaby Council EN | East Midlands | procontract | Weekly | Today | 779 |
| Blackburn with Darwen Council EN | North West | generic | Weekly | Pending | 0 |
| Blackpool Council EN | North West | generic | Weekly | 35d ago | 10 |
| Blaenau Gwent Council WL | Wales | bravo | Weekly | Today | 73 |
| Bolsover Council EN | East Midlands | in-tend | Weekly | Today | 48 |
| Bolton Council EN | North West | generic | Weekly | 35d ago | 10 |
| Boston Council EN | East Midlands | in-tend | Weekly | 9d ago | 1 |
| Bournemouth University EN | South West | in-tend | Weekly | Broken | 0 |
| Bournemouth, Christchurch and Poole Council EN | South West | generic | Weekly | Pending | 0 |
| Bracknell Forest Council EN | South East | generic | Weekly | Pending | 0 |
| Braintree Council EN | East of England | generic | Weekly | Pending | 0 |
| Breckland Council EN | East of England | in-tend | Weekly | Broken | 0 |
| Brent Council EN | London | generic | Weekly | Pending | 0 |
| Brentwood Council EN | East of England | generic | Weekly | Pending | 0 |
| Bridgend Council WL | Wales | generic | Weekly | Pending | 0 |
| Brighton and Hove Council EN | South East | generic | Weekly | Pending | 0 |
| British Film Institute EN | London | in-tend | Weekly | Today | 7 |
| Broadland Council EN | East of England | generic | Weekly | Pending | 0 |
| Bromley Council EN | London | generic | Weekly | Pending | 0 |
| Bromsgrove Council EN | West Midlands | generic | Weekly | Pending | 0 |
| Broxbourne Council EN | East of England | generic | Weekly | Pending | 0 |
| Broxtowe Council EN | East Midlands | generic | Weekly | Pending | 0 |
| Brunelcare EN | South West | in-tend | Weekly | Broken | 0 |
| Buckinghamshire New University EN | South East | in-tend | Weekly | Broken | 0 |
| Burnley Council EN | North West | generic | Weekly | Pending | 0 |
| Bury Council EN | North West | generic | Weekly | Pending | 0 |
| C2C Railway Limited EN | London | bravo | Weekly | Today | 14 |
| Caerphilly Council WL | Wales | generic | Weekly | Pending | 0 |
| Calderdale Council EN | Yorkshire and the Humber | generic | Weekly | Pending | 0 |
| Calico Homes Limited EN | North West | in-tend | Weekly | Broken | 0 |
| Cambridge Council EN | East of England | procontract | Weekly | Today | 320 |
| Cambridge University Hospitals Nhs Foundation Trust EN | East of England | bravo | Weekly | Broken | 0 |
| Cambridge University Hospitals Nhs Foundation Trust EN | East of England | bravo | Weekly | Broken | 0 |
| Cambridgeshire and Peterborough Combined Authority EN | East of England | in-tend | Weekly | Today | 7 |
| Cambridgeshire County Council EN | East of England | generic | Weekly | Pending | 0 |
| Camden Council EN | London | generic | Weekly | Pending | 0 |
| Cannock Chase Council EN | West Midlands | generic | Weekly | Pending | 0 |
| Canterbury Council EN | South East | generic | Weekly | Pending | 0 |
| Cardiff and Vale University Health Board WL | Wales | bravo | Weekly | Broken | 0 |
| Cardiff Metropolitan University WL | Wales | in-tend | Weekly | Broken | 0 |
| Cardiff University WL | Wales | in-tend | Weekly | Today | 21 |
| Carmarthenshire Council WL | Wales | atamis | Weekly | Broken | 0 |
| Castle Point Council EN | East of England | generic | Weekly | Pending | 0 |
| Causeway Coast and Glens Borough Council NI | Northern Ireland | in-tend | Weekly | Today | 18 |
| Centre For Process Innovation Limited EN | North East | in-tend | Weekly | Today | 15 |
| Ceredigion Council WL | Wales | bravo | Weekly | Today | 69 |
| Charnwood Council EN | East Midlands | generic | Weekly | Pending | 0 |
| Chelmsford Council EN | East of England | generic | Weekly | Pending | 0 |
| Cheltenham Council EN | South West | generic | Weekly | 31d ago | 0 |
| Cherwell Council EN | South East | eusupply | Weekly | Broken | 18 |
| Cheshire East Council EN | North West | generic | Weekly | Pending | 0 |
| Cheshire West and Chester Council EN | North West | generic | Weekly | Pending | 0 |
| Chesterfield Council EN | East Midlands | procontract | Weekly | Today | 27 |
| Chichester Council EN | South East | generic | Weekly | Pending | 0 |
| Chorley Council EN | North West | generic | Weekly | Pending | 0 |
| Citizen Housing Group Ltd EN | West Midlands | in-tend | Weekly | Broken | 0 |
| City of London Corporation EN | London | generic | Weekly | Pending | 0 |
| City of Sunderland College EN | North East | in-tend | Weekly | Broken | 0 |
| Clackmannanshire Council SC | Scotland | generic | Weekly | Pending | 0 |
| Cohesionconsulting (In-Tend portal) EN | London | in-tend | Weekly | Today | 8 |
| Colchester Council EN | East of England | generic | Weekly | Pending | 0 |
| Comhairle nan Eilean Siar SC | Scotland | generic | Weekly | Pending | 0 |
| Commonwealth War Graves Commission EN | South East | in-tend | Weekly | Today | 25 |
| Connected Places Catapult EN | London | in-tend | Weekly | Today | 21 |
| Conwy Council WL | Wales | generic | Weekly | Pending | 0 |
| Cornwall Council EN | South West | generic | Weekly | Pending | 0 |
| Corporate Officer of the House of Commons EN | London | atamis | Weekly | Today | 48 |
| Cotswold Council EN | South West | in-tend | Weekly | Broken | 3 |
| Cottsway Housing Association Limited EN | South East | in-tend | Weekly | Broken | 0 |
| County Durham Council EN | North East | generic | Weekly | Pending | 0 |
| Coventry Council EN | West Midlands | generic | Weekly | 7d ago | 0 |
| Coventry University EN | West Midlands | in-tend | Weekly | Today | 7 |
| Crawley Council EN | South East | generic | Weekly | Pending | 0 |
| Crowncommercialservice (Jaggaer portal) EN | North West | bravo | Weekly | Broken | 0 |
| Croydon Council EN | London | generic | Weekly | 29d ago | 0 |
| Csg (Delta eSourcing portal) EN | South East | delta | Weekly | Today | 47 |