4–6fact
tools to answer one question
Slack → BI → spreadsheet → SQL editor → docs → back to Slack. The round trip kills momentum and erodes trust.
Built with our design partners across —
- Senior living
- B2B SaaS
- Consumer lending
- Retail & e-commerce
- Manufacturing
- Logistics
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.
the trust layer
Answers you can put in front of an auditor.
Governance isn't a feature bolted on the side — it's woven through every answer Sema returns. Here's the machinery that makes an answer defensible.
Signed Evidence Packs
Ed25519 signatures on every answer.
Each answer is bundled with its question, SQL, lineage, and access context, then cryptographically signed. Re-verify the signature any time — tampering is mathematically detectable.
Shareable audit links
Read-only, expiring, no login.
Send an auditor a link that renders the signed pack — SQL, lineage, signature badge, PDF export — with zero access to the rest of your workspace. Every open is logged.
Governed checks
DPDP, BFSI & SaaS check sets.
Curated, industry-specific compliance checks run on a schedule and freeze evidence the moment they fire — audit-readiness on autopilot.
Semantic graph + metrics
Verify a join once. Answer forever.
Tables, columns, metrics, and business terms live as a typed graph. Confirm an inferred join once and every future answer inherits the correct path.
Alerts → Signals registry
Drift becomes an immutable record.
Threshold and deviation alerts on any metric. A reviewed breach becomes a signal with provenance in an append-only registry — prove what you knew, and when.
Conversational query
Plain English in, auditable chart out.
Ask in your own words. Sema asks clarifying questions before guessing, shows the SQL it ran and the nodes it touched, and picks the right chart automatically.
how it works
From warehouse to trusted answer in three moves.
No pipelines to rebuild, no metrics to re-model by hand. Sema meets your stack where it is.
01
Connect
Point Sema at your warehouse or upload a file. It introspects the schema, profiles every table, and maps the terrain in seconds — sandboxed and read-only.
02
Define
Sema drafts plain-English definitions, infers joins, and proposes metrics. You confirm what's right; the semantic graph becomes your single source of truth.
03
Ask
Anyone on the team asks in plain English and gets a governed, explainable answer — with the SQL, lineage, and a signed evidence pack attached.
the technology
Not a chat-with-your-data toy. A governed analytics engine.
Anyone can wire an LLM to a database in an afternoon. What's hard — and what Sema does — is everything between the question and an answer you can defend: understanding meaning, planning safe SQL, visualizing it, and signing the result. Six layers, working as one.
beyond a chatbot
One question. A whole analyst's worth of work.
It visualizes
Sema picks the right chart for the shape of the answer — bar, line, choropleth, stat — and renders it automatically. No dragging fields onto a canvas.
10+ chart types, auto-selected
It's an autonomous analyst
Ask a broad question and Sema plans the sub-queries, assembles the findings, writes the narrative from real numbers, and builds a shareable deck — PPTX, PDF, or web.
Question → full analysis & deck
Governance is built in
Row-level access, column masking, refusals, and Ed25519-signed evidence are on by default — not a plugin you remember to add later.
Signed & audited, every answer
It saves time & cost
Collapse the Slack → BI → spreadsheet → SQL round-trip into one prompt. Audits that took weeks take an afternoon; analyst hours go back to analysis.
Weeks of audit prep → hours
What happens between your question and the answer
step 1
Question
Plain English
step 2
Semantic graph
Meaning + relationships
step 3
Governed planner
RBAC + policy at plan time
step 4
Sandboxed SQL
Static-analysed, read-only
step 5
Auto-visualization
The right chart, chosen
step 6
Signed evidence
Ed25519 · audit-ready
The stack you'd otherwise have to build
Each layer is months of specialised engineering. Together they're the reason an answer is trustworthy — and the reason this is hard to replicate.
01
Semantic knowledge graph
Typed entities, verified joins, first-class metrics — a control plane, not a wiki.
02
Grounded planning + repair
LLM planning constrained to approved entities, with one safe repair-retry on error.
03
Policy & RBAC engine
Role-aware refusals and column masking enforced before any SQL executes.
04
Sandboxed execution
Ephemeral, network-isolated runners; generated SQL statically analysed first.
05
Auto-visualization
Result-shape-aware charting and dashboard assembly.
06
Cryptographic evidence + audit
Ed25519-signed answer bundles and an append-only, exportable audit log.
by the numbers
40+
database connectors
100%
answers with signed evidence
<2s
median time to a governed answer
7yr
audit retention, append-only
built for your stack
Solutions for your industry.
The same governed semantic layer, tuned to the questions your sector actually asks. Pick yours.
Healthcare
Readmissions, occupancy & CMS reporting — answered, with an audit trail.
ExploreSaaS
Churn, NRR, MAU & pipeline — one definition the whole company trusts.
ExploreFinancial Services
Risk, exposure & regulatory reporting — explainable and fully audited.
ExploreRetail
Sales, inventory, margin & basket — answered across every channel.
Explorearchitecture
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.
security & compliance
Governed by default. Compliant by design.
Sema is built for regulated teams — aligned to India's DPDP Act 2023, GDPR-ready, and running a SOC 2 program. Your data plane can stay entirely inside your network.
India DPDP Act 2023
Purpose limitation, consent records, data-principal rights workflows, and breach-notification readiness built into the platform.
Encryption everywhere
TLS 1.2+ in transit, AES-256 at rest. Workspace LLM keys are Fernet-encrypted; secrets never touch the client.
RBAC + column masking
Viewer, analyst, admin, owner — enforced in code. Restricted columns are refused or masked at plan time, before any SQL runs.
Append-only audit log
Every mutation and every answer recorded immutably, filterable by actor, kind, and date, exportable for your auditors.
VPC / self-host
Deploy Sema's control plane in your own Kubernetes. Bring your own Postgres and object store — Sema never warehouses your rows.
Evidence on demand
SOC 2, HIPAA, and GDPR evidence packs generated from the live audit trail — not assembled by hand the week before a review.
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
Things you'll want to know.
design partners
Trusted by teams who can't afford a wrong number.
We build in the open with a small cohort of design partners across regulated industries.
"Sema turned our 'which number is right?' Slack threads into a single governed answer with the SQL attached. Our audit prep went from weeks to an afternoon."
Head of Data
Senior-living operator
"The signed evidence packs are the unlock. When compliance asks how we got a figure, we send a link — signature, lineage, and all."
VP Analytics
Consumer lending
"We connected our warehouse on a Friday and the whole ops team was self-serving governed answers by Monday. No dashboards to rebuild."
Director of BI
B2B SaaS
talk to us
See Sema on your own data.
Tell us what you're trying to answer. We'll show you Sema running against a dataset like yours — and reply within one business day.
- A 20-minute, no-slides walkthrough on data like yours.
- Straight answers on deployment, governance, and pricing.
- No pressure, no drip campaign — just a real conversation.
press & media
Media kit.
Everything you need to write about Sema — logos, brand colors, a company one-pager, and product screenshots. Grab an individual asset or the full kit.
Logo pack
Mark + lockup · light & dark · PNG/WebP
Brand colors
Palette + hex codes
One-pager
Company overview · PDF
Dashboard screenshot
Product UI · JPG
Evidence pack screenshot
Audit view · JPG
Full media kit
Everything above · ZIP
Company boilerplate
Sema is the semantic layer for enterprise AI — governed, explainable text-to-SQL that lets teams ask business questions in plain English and get audit-ready answers with cryptographically signed evidence.
Press enquiries: press@datafrontier.co