Auto Manual
MirrorMaskedRaw
Prompt
Build me a workflow that finds my most valuable customers
planning a pipeline
Runs locally. No data leaves your browser.
Describe the result. Overlane builds the pipeline, validated and running.
Your machine · real The Mirror, at work To the AI · faithful fake
On your device What the AI sees
NameNoah Lowe
Emailnoah.lowe@initec.com
CityParis
Revenue£284,910
Mirror
AI + egress ledger 3 calls tier: mirror real values sent: 0 receipt ↓
Your real data never crosses this line.
The workflow contract · built from fakes only
"name""Most valuable customers"
"nodes"
"type""input""dataset""customers"
"type""join""on""customer_id"
"type""summarize""as""lifetime_value"
"type""sort""desc""lifetime_value"
Validated against the strict schema before it touches your canvas.
A working transformation, built from a sentence, and the real data never left.
Get Data
customers · 40,912
Get Data
orders · 318,447
Join
on customer_id
Summarize
sum → lifetime_value
Sort
lifetime_value ↓
customerlifetime_value
Ada Cho£0
Omar Reyes£0
Zoe Haas£0
Scroll, or click the console, to play
Governed data preparation

Prepare sensitive data
without losing control of it.

A deterministic engine runs inside your browser tab, so the same workflow on the same data returns the same result every run, cell for cell. Nothing to install, your data is never uploaded, and when AI assists it only ever sees a faithful fake, never your real values.

Try the product Book a demo
Live in your browser. No sign-up, no install.
Runs in your browser· Deterministic engine· Data never uploaded· Auditable
Browser, boundary, or cloud

Runs where your data must stay.

Start in your browser. Add a server, in your own boundary or cloud-hosted, when you want scheduling and direct connections to your databases. The same deterministic engine runs in all three.

In your browser

The deterministic engine runs in a Web Worker on your machine. Private by default, nothing to install, data never uploaded.

In your boundary

Deploy one hardened container inside your own network. Unlocks scheduling (cron and triggers, unattended) and connections to your databases and warehouses. Credentials stay server-side and scoped.

Postgres · Snowflake · MySQL · more

Cloud hosted

Prefer managed? Run Overlane as a cloud platform for your team, with scheduling and connectors built in. Same engine, same Mirror.

Scheduling and database connectors need a server. Everything else runs locally, in the browser.

Draw it, or just say it.

Two ways to build. The same engine runs underneath: a columnar engine in your browser, in a Web Worker.

Manual mode

A real node canvas

Drag nodes onto the canvas and wire them together. Full control, every step visible.

Input
Filter
Summarize
Auto mode

A chat that builds it

Describe the result in plain English. Overlane assembles and validates the graph for you.

Find my most valuable customers
Built a 5-node pipeline: input → join → summarize → sort.
Validated · running locally
Deterministic by design

Run it once, or a thousand times. Same answer.

Overlane's engine is deterministic: the same workflow on the same data returns the same result every run, cell for cell. No hidden sampling, no silent nulls, and it fails loud rather than quietly wrong.

Deterministic run · completed in 9 ms
Get Data 0 Clean 0 Join 0 Summarize 3
regioncustomerslifetime_value
AMER12,204£0
EMEA10,880£0
APAC9,442£0
Field summary · lifetime_value
count0
nulls0
mean£0
max£0
Summarize · this step produced 0 rows
group key customer_id not found after join. Fixed inputs, fixed error, never a silently wrong number.
  • Same inputs, same output, every run, cell for cell.
  • Every AI-authored graph round-trips a strict validator before it runs.
  • Fail-loud on empty, missing, or broken steps.
When AI helps · privacy tier
egress ledger3 calls · 3 mirror · real sent none

The default. Every value the AI could see is replaced with a faithful fake first. A fake email is still an email; the shape of your measures is preserved. Real values never leave your machine.

Connected

Plug into your stack.

Read straight from your databases and warehouses, transform locally, then write results back. Credentials stay server-side and scoped, never in the browser.

Live
PostgreSQL
Read & write
Live
Snowflake
Read & write
Soon
MySQL
Read & write
Soon
SQL Server
Read & write
Soon
Amazon Redshift
Read & write
Soon
Google BigQuery
Read & write
Files too: CSV, Excel, Parquet, and JSON, at any size, streamed through one node.
Make your own tools

Capture a chain. Reuse it everywhere.

Turn any chain of steps into one reusable, shareable tool. Teams build a shared toolbox; a whole macro becomes a single node.

Clean Parse dates Summarize
Monthly Revenue Rollup 1 node
Built in Jersey, for Jersey

Security and technology, hand in hand.

Overlane is built on a small island with an outsized reputation for guarding what matters, and a heritage of finance-grade discretion and rigorous data protection. It shapes our founding principle: powerful technology has no business seeing your data.

Like La Corbière standing watch over the approach, the technology does the work while the safeguards never leave their post. Private by architecture, auditable by default, and yours to run wherever your data must stay.

Oil painting of La Corbière lighthouse, Jersey, at sunset, with the causeway leading out to the lighthouse on its rocks
La Corbière · Jersey

The data studio that
never sees your data.

Book a demo Try the product Self-host it