Comparison

Attaché vs Supermetrics

Both touch the same sources — GA4, Google Ads, Search Console, Meta Ads — but they solve different problems. Supermetrics moves your data into spreadsheets and warehouses. Attaché makes it queryable in real time by an AI assistant. This page lays out the real differences, including where Supermetrics is the better choice.

Updated 5 August 2026

In one sentence

If you need recurring reporting in Looker Studio, Sheets or a warehouse, pick Supermetrics. If you need to ask questions in plain language across several clients from Claude, pick Attaché.

The differences that matter

	Attaché	Supermetrics
Type of tool	Access layer: requests are proxied to the APIs in real time	Data pipeline: scheduled extraction to a destination
Where data lands	Nowhere — nothing is copied or stored with us	Sheets, Looker Studio, BigQuery, Snowflake, Excel…
How you use it	A Claude conversation (or any MCP client)	Dashboards, spreadsheets, SQL
Pricing model	Per connected client, all 4 sources included	Per data source and per account (see their current grid)
End-client onboarding	One link: the client authorises their own accounts via OAuth	Configured by the agency, using the access it already holds
Who owns access	The end client: they see what is shared and revoke at will	The agency, through its own account access
Several clients at once	A master connector queries the whole portfolio	One source per connection, aggregated downstream
Freshness	Real time, on every question	Whatever the refresh schedule allows
History	No: we keep no data	Yes — that is the point of a warehouse
Writing / editing	Impossible by design (read-only)	Depends on connectors and destinations

When Supermetrics is the right call

You need history beyond the platforms’ own retention windows.
Your deliverable is a recurring dashboard for clients who will not talk to an AI.
You feed a warehouse to join marketing with CRM and billing data.
You need connectors far beyond the four major advertising sources.

When Attaché is the right call

You want to ask a question and get an answer, not assemble a report.
You manage several clients and switching between them must not require reconfiguring anything.
Your clients would rather authorise their own accounts than hand you access.
You do not want a copy of their data living anywhere outside Google and Meta.

Or both, honestly

They coexist well: the warehouse keeps history and powers dashboards, Attaché handles daily exploration and audits. They are not substitutes — they are used at different moments of the week.

Frequently asked questions

Is Attaché an alternative to Supermetrics?

For "querying your advertising data", yes. For "feeding a warehouse or a dashboard", no: Attaché copies no data and has no destination.

Can I use Attaché without being an agency?

Yes. An in-house marketing team connects its own accounts and gets its connector, with no client invitation involved.

Do I need a Google Cloud project or an API key?

No. OAuth infrastructure, token refresh and the MCP server are hosted by Attaché; users only ever see a "Sign in with Google" button.

Is my data sent to an AI model?

Query results travel to the Claude client that asked the question, like any connected tool. Nothing is stored with us, and the scopes are read-only.

Request access Pricing

Comparison written by Attaché. Supermetrics evolves: check their current pricing and connector catalogue on their own site before deciding.

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