The trust layer for data

Trust your data. Break silos.

Limen makes every number provable the moment data moves. Producers and consumers can change a pipeline, swap a system, and codify tribal knowledge without rebuilding trust each time. 

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Certainty, not observability Shift-left validation Works with dbt · SQL · Python
Shift-left methodology

Catch data issues at the source.

Observability tools tell you something broke after it reached a dashboard, model, or customer. By then the bad data has spread.

Limen checks data at every read, write, and transform, the moment it is produced, so a defect stops at its origin and the failure message says exactly what broke.

  • Every read, write, and transform is gated by its contract.
  • Failing batches stop before any consumer sees them.
  • Producers and consumers share one contract, so teams stop guessing at each other's data.
  • A defect caught at write costs a fraction of one found in a report.
Source
raw ingest
Transform
contract enforced
Serve
tables & marts
Observability reacts here
Consume
BI · ML · partners
Cost to fix →
1×10×100×1000×
Anatomy of a data contract

Every assumption, made explicit.

A data contract is the agreement between whoever produces a table and everyone who depends on it, written as executable clauses. Each clause is a promise Limen enforces on every run.

  • SchemaColumns, types, nullability, and primary keys the table guarantees.
  • FreshnessWhen the table must update and the maximum acceptable lag.
  • VolumeExpected row counts and how much they may move day over day.
  • DistributionNull rates, percentiles, and value ranges that define normal.
  • IntegrityJoins, foreign keys, and referential checks across tables.
  • SemanticsPinned business definitions, signed off by producer and consumers.
Data certificates

Immutable proof, chained run over run.

A certificate travels with your data as tamper-evident proof of its lineage and transformation history. It also proves, in one lookup, that the data still satisfies its contract.

Certificate Pass
Contractorders_daily@v3
Issued10-12 06:02 UTC
Data hashsha256:4a7e…11bd
Prev— genesis
Certificate Pass
Contractorders_daily@v3
Issued10-13 06:01 UTC
Data hashsha256:9c1f…0e44
Prev4a7e…11bd
Certificate Latest
Contractorders_daily@v3
Issued10-14 06:00 UTC
Data hashsha256:b3d8…7af2
Prev9c1f…0e44
How it works

From agreement to certificate, on every run.

An unbroken chain of accountability from the moment a definition is agreed to the moment data is consumed.

  1. Define criteria

    Producer and consumer agree on what the data must mean: schema, freshness, distribution, and business semantics.

  2. Encode & validate

    The agreement becomes an executable contract that validates the data at transformation.

  3. Issue certificate

    A passing run issues a signed certificate carrying the verdict, a hash of the data, and a link to the previous certificate.

  4. Alert on failure

    A failing clause stops the batch and notifies the owners with the exact assertion that broke, before anything downstream consumes it.

Get started

Data your whole team can trust.

Give every team that depends on your data the confidence that it's right, every run. 

Book a demo →