Relativity API
Relativity runs a deep developer platform: REST and .NET Kepler APIs at platform.relativity.com with OAuth2, NuGet SDKs, published rate limits, and Developer Program sandboxes. The gap is eventing: there are no universal webhooks, so partners poll the Audit API.
Frequently asked questions
Relativity scores F on the API Report Card. Relativity runs a deep developer platform: REST and .NET Kepler APIs at platform.relativity.com with OAuth2, NuGet SDKs, published rate limits, and Developer Program sandboxes. The gap is eventing: there are no universal webhooks, so partners poll the Audit API.
Without a usable official API, teams fall back on manual exports, file drops, or one-off vendor integrations. The other option is an unofficial API layer like Supergood that automates the authenticated web app directly.
Relativity (legal entity *Relativity ODA LLC*, formerly *kCura LLC*) is the dominant eDiscovery, investigations and legal data intelligence platform, founded in 2001 by Andrew Sieja in Chicago, Illinois, and headquartered at 231 South LaSalle Street, 20th Floor, Chicago, IL 60604.
Vertical: Legal, specifically eDiscovery, investigations, regulatory response, legal hold, internal investigations, data-breach response, second-request response and AI-assisted document review. A litigation support manager at an AmLaw 100 firm logs into the RelativityOne web app, opens a matter workspace, and runs a structured analytics set (email threading, near-dup, language identification) over a freshly processed 800GB Outlook PST collection ingested via Relativity Collect from Microsoft 365..
Very high, the dominant system-of-record for U.S. eDiscovery and the largest installed base for legal investigations globally.
Workspace metadata: workspace ID, name, matter, client, status, template, region, instance, ARM history, last activity, billing tier, storage usage, processing GB, AI tokens consumed.
Relativity is 25 years old as a company (founded 2001), but it is the rare legacy legal-tech vendor that has successfully re-platformed itself as a modern cloud-native SaaS.
Kepler / .NET-first SDKs make non-.NET partner integrations (Node/Python/Go) heavier, REST clients work but require manually building DTOs from the .NET model. OAuth2 token lifecycle (issuance, rotation, per-workspace scope) is non-trivial; many partners default to basic auth in dev and hit prod gaps later. Full sourced list under Sources below.
Common alternatives include Microsoft Purview eDiscovery (Premium), Everlaw, DISCO (CS Disco), Reveal, Logikcull (Reveal), Nuix Discover (Ringtail). Graded alternatives appear under "More from the report card" below.
Grades measure one thing: can a customer's engineering team get their own data out programmatically? We check six things (whether a real API exists, how access is gated, data coverage, auth quality, docs and developer experience, and stability) and roll them into a letter grade. Grades get re-verified, and they only move on evidence.
Yes. Supergood maintains an unofficial Relativity API and MCP server so AI agents and internal tools can read and write Relativity data. See the Relativity integration docs at supergood.ai/docs/relativity-api.