Identity graph
Callosum headquarters, locations and relationships
- Legal name
- Callosum Technologies Ltd.
- Industry
- Software
- Founded
- 2025
- Phone
- +44 70 4707 3508
- Website
- callosum.com
- LinkedIn profile for Callosum
Callosum office locations
| City | State / region | Country | Type |
|---|---|---|---|
| London | England | United Kingdom | Headquarters |
- Parent company
- No parent company recorded in GraphIQ.ai.
Verified from public filings, company websites and news · Methodology
Open in GraphIQ.aiMore Callosum data in GraphIQ.ai
This page shows the public record. Sign in with a work email to open the rest of the entity.
-
Technographics (available after sign-in)
Software, cloud and infrastructure in use.
-
Firmographics (available after sign-in)
Revenue, headcount, growth and industry codes.
-
Capabilities (available after sign-in)
Products, services and certifications.
-
News (available after sign-in)
Recent coverage and signals, resolved to the entity.
-
And more (available after sign-in)
Subsidiaries, people and lookalike companies.
Who uses the Callosum entity
-
Revenue and GTM teams
Territories, enrichment and account expansion on one resolved account.
RevOps Sales & marketing -
Developers and AI agents
The entity and its relationships through the REST API and MCP server.
Developers -
Private equity and investors
Corporate family, comparable companies and deal sourcing.
Private equity -
Industry and supply chain
Suppliers, sites and partners mapped to the right legal entity.
Industry -
Government and public sector
Supplier vetting, ownership and jurisdiction checks against one verified entity.
Government
About Callosum
Callosum is headquartered in London, England, United Kingdom. Founded in 2025, the company employs approximately 5 people worldwide.
Where is Callosum's main office?
Callosum's main headquarters office is located at London, United Kingdom, London, England kingdom, United Kingdom. This is the company's primary corporate address.
Callosum contact information
The main switchboard for Callosum headquarters can be reached at +44 70 4707 3508. Official website: callosum.com.
What does Callosum do?
Callosum is a smart API design and development tool that can automate your OpenAPI implementation. It works completely offline with no login or cloud sync required
One entity, every stage
Put Callosum to work across your revenue bowtie
- Target Define the market Build the account list from companies shaped like your best customers, Callosum included. Fingerprint search
- Cover Plan territories Callosum resolves to one account, so it lands in one territory, once. Territory planning
- Engage Act on timing Leadership changes, funding and M&A arrive linked to the account, not a loose headline. Signal monitoring
- Convert Close on a resolved record Inbound and closed-won attach to one CRM record, with no duplicates to merge. CRM enrichment
- Retain Ground every answer Customer teams and AI agents answer from the same entity, with a source and a date. AI agent data layer
- Expand Find the next buyer inside Follow subsidiaries and divisions to the next team that can buy. Account expansion
About the source
What is GraphIQ.ai?
A B2B identity graph. It resolves each organization into one verified entity and maps its parent and subsidiaries, employees, competitors and news signals. Revenue teams use it in the product; AI agents query it through the REST API and MCP server.
POST/api/v2/organizations/search
Callosum: frequently asked questions
Where is Callosum headquarters?
London, United Kingdom, London, England kingdom, United Kingdom.
What is Callosum's phone number?
+44 70 4707 3508 (headquarters).
When was Callosum founded?
2025.
How many employees does Callosum have?
About 5, as of October 2026 (GraphIQ.ai estimate).
Questions about GraphIQ.ai
Is GraphIQ.ai a list of companies like a spreadsheet?
No. Each organization resolves to one verified entity linked to its parent, subsidiaries, people and signals, so Callosum here is the same Callosum in your CRM, territory plan and agent answers.
Where does this Callosum data come from?
Public filings, company websites and news, resolved to one entity and continuously updated.