Products
London DBThe complete city schema. 45TB of live data, ready to query.Alliela AIYour forensic agent. Ask questions in plain English, get expert answers.SurveillanceNever miss a signal. Get instant alerts when companies or assets change.
Solutions
API AccessPublic APIs for programmatic access. JSON format.Bespoke ResearchPremium research service. Tailored intelligence reports.Intelligence CatalogHigh-conviction signals. Ready-to-use intelligence products.Data Clean RoomPortfolio risk checking without sharing your data.
Partners
Data SyndicateTurn your corporate data into a revenue stream. We clean, govern, and distribute your digital exhaust to our financial network.Technology AllianceVerified integrations for the modern stack. Native connectors for Snowflake, AWS, and Azure.Consulting & SIFor agencies and systems integrators. Build your advisory practice on top of the City OS infrastructure.
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CHANGELOG

New schemas, API updates, and deprecations. Subscribe to the RSS Feed to stay ahead of breaking changes.

LATEST UPDATES

October 2026
NEWSchema Addition: Energy Performance Certificates (EPC)

Added 4.2M records to LONDON_DB.HOUSING.EPC_RATINGS.

Includes current rating, potential rating, and retrofit recommendations.

IMPROVEMENTAlliela AI Latency

Optimized context window caching. Query response time reduced by 40%.

September 2026
FEATURESurveillance: Webhook Signatures

Added X-OpenData-Signature header to all outgoing webhooks for security verification.

DEPRECATIONTransport API v1

Endpoints /v1/tube-status are now deprecated. Please migrate to /v2/transport/tfl before Dec 31st.

August 2026
NEWDataset: Companies House "Significant Control"

Full beneficial owner mapping now available in the CORPORATE schema.

FAQ
Is OpenData.London a data provider or an analytics platform?−
It is both. We provide the infrastructure (London DB) for data engineering teams who need raw, zero-copy access to 6,000+ standardized datasets via Snowflake. Simultaneously, we provide the intelligence (Alliela AI) for business analysts who need to query that data using natural language, without writing SQL.
Is this data scraped? How do you handle provenance?+
We do not scrape. We act as an authorized aggregator for public sector endpoints. Every row of data in London DB is cryptographically hashed with a lineage stamp linking it back to the original government source file (e.g., HM Land Registry, Companies House). You get a fully audit-ready chain of custody.
What is the latency between the source and your database?+
It depends on the asset class. High-velocity feeds like TfL Transport and Grid Telemetry are streamed in near real-time (seconds). Statutory registers like Planning Applications and Corporate Insolvency are reconciled daily. We map the update frequency to the source authority's maximum publish rate.
Does our proprietary data ever leave our environment?+
Never. Because we operate as a Snowflake Native App, our code comes to your data. If you use Alliela AI to cross-reference your private loan book against our public data, that compute happens entirely inside your governance perimeter. We see zero PII and zero client data.
What if I need a niche dataset that isn't listed?+
We operate an "On-Demand Ingestion" pipeline. If a public dataset exists in London that we don't currently host, enterprise clients can request ingestion. Our engineering team will build the connector, normalize the schema, and add it to the London DB master graph within 48-72 hours.

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