4–6fact
tools to answer one question
Slack → BI → spreadsheet → SQL editor → docs → back to Slack. The round trip kills momentum and erodes trust.
Trusted by data teams at —
- Northwind
- Atlas Mfg.
- Helix Bio
- Polaris Bank
- Vertex Retail
- Lumen Health
the problem
The fragmented stack is breaking analytics.
Every dashboard hides a maze of joins, business rules, and tribal knowledge. AI on top of that maze guesses — confidently and incorrectly.
1 in 3fact
metrics drift across dashboards
Revenue, churn, MAU — defined three different ways in three places. Nobody knows which is right anymore.
73%fact
of AI answers cite the wrong column
LLMs hallucinate against undocumented schemas. Without a semantic layer, retrieval grabs the closest-named field, not the right one.
three bets
What we believe.
The semantic graph is the control plane.
Tables, columns, metrics, and business terms live as a typed graph — not a wiki, not a YAML file. Every query, dashboard, and agent reads from the same source of truth, and changes propagate.
Chat and canvas, unified.
Conversation is the input; a versioned canvas of charts, queries, and explanations is the output. No more screenshotting numbers from one tool into another.
Governed by default.
Row-level access, column masking, query logging, and signed answers are on at install. Turning governance off is a deliberate choice — not the consequence of forgetting it.
v1 features
Eleven capabilities. One governed answer.
From source connection to audit-grade answer — every layer of the semantic stack ships today.
Connectors
40+ sources, sandboxed sync.
- Postgres, Snowflake, BigQuery, Databricks, Redshift, MS SQL, MySQL, MongoDB, S3 — plus more.
- Incremental sync with watermark + CDC where supported.
- Sandboxed execution — Sema never sees raw rows it shouldn't.
Schema
Live introspection on connect.
- Tables, columns, types, and keys profiled in seconds.
- Snapshots track drift over time.
- The substrate every other layer is built on.
Table Health
Freshness, volume, nulls at a glance.
- Row counts, freshness, and null ratios per table.
- Flags stale or empty tables before they break an answer.
- Health scores roll up to the workspace overview.
Auto-Glossary
Plain-English definitions, generated.
- Every table and column gets a business definition.
- Synonyms + sensitivity + lifecycle, human-confirmed.
- Embedded for semantic search across your vocabulary.
Chat + Auto-Viz
Plain English in. Auditable chart out.
- Asks clarifying questions before guessing.
- Shows the SQL it ran and the graph nodes it traversed.
- Auto-selects the right chart for the answer.
Reports
Save, schedule, and deliver.
- Pin any answer as a saved report.
- Schedule recurring delivery by email.
- Versioned — diff today against last Tuesday.
Alerts
Know the moment a metric moves.
- Threshold + deviation rules on any metric.
- Evaluated on a schedule, routed to owners.
- Every breach captured with frozen evidence.
Signals
Drift becomes a governed record.
- Reviewed alerts become signals with provenance.
- Approve → immutable registry entry.
- Prove what you knew, and when.
Semantic Graph
Verified joins, first-class metrics.
- Navigate tables, joins, and metrics visually.
- Verify inferred joins once — every answer benefits.
- Metrics resolve by name across the org.
RBAC
Role-appropriate access, enforced.
- Viewer, analyst, admin, owner — enforced in code.
- Restricted columns refused or masked by role.
- Refusals happen at plan time, before SQL runs.
Audit Log
Append-only, compliance-grade.
- Every mutation recorded immutably.
- Filter by actor, kind, and date; export to CSV.
- The evidence pack for any decision, in one click.
roadmap
Where we're going.
Available nowV1
Connect · Discover · Ask · Govern
The full V1 surface — connectors, schema, health, glossary, chat + viz, reports, alerts, signals, graph, RBAC, and audit.
Q1 2027V2
Compliance + eval + federation
A Compliance Agent for advanced governance, an AI eval harness, and federated joins across multiple warehouses.
Q3 2027V3
Predictive + embedded
Auto-trained forecast models per metric. Embed Sema into your own product with a signed widget and provenance trail.
architecture
Built for enterprise, by default.
Sema runs in your VPC or ours. The semantic graph and the execution sandbox are separable — keep your data plane in your network.
01
MCP Toolbox
Every Sema capability is an MCP tool. Drop the toolbox into Claude, Cursor, or your in-house agent and inherit Sema's governance.
02
OAuth2 / OIDC
Bring your IdP — Okta, Entra, Auth0, Google Workspace. Group-mapped roles flow into row-level policies automatically.
03
Sandboxed execution
Query plans run in ephemeral containers with no outbound network. Generated SQL is statically analyzed before it ever sees a database.
04
VPC deploy
Helm chart for K8s. Bring your own Postgres + object store. Sema's control plane never holds your data — only the graph.
pricing
Simple, by seat.
Start free in a sandbox. Upgrade to a 14-day Pro trial — no card to start — and convert when your team is hooked.
Sandbox
Freefree forever
Evaluate Sema against your own data, free.
- 1 connector · 1 user.
- 100 chat queries / month.
- 5 saved reports · no scheduled delivery.
- No alerts or signals.
- "Powered by Sema" on embeds.
Pro
$49/user/mo
min 3 seats · 14-day trial
For teams running on governed answers.
- Unlimited connectors + chat.
- Unlimited reports, schedules, alerts, signals.
- RBAC + audit log.
- Email support.
- No card required to start the trial.
Business
$99/user/mo
min 10 seats
For orgs that need SSO and advanced governance.
- Everything in Pro.
- SSO + advanced governance (Compliance Agent — V2).
- AI eval harness + federated joins (V2).
- Priority support.
- 99.9% SLA.
Enterprise
Contactannual
For regulated, multi-region, and self-hosted deployments.
- Everything in Business.
- SAML / SCIM · custom DPA · BYOK encryption.
- On-prem option (Helm).
- SOC 2 + HIPAA + GDPR evidence packs.
- Named CSM · 99.95% SLA.
questions