Fermi Dev: Pricing, Features & Best Use Cases

Our take: Fermi Dev targets enterprises that want an AI layer over their business systems with an approval step before changes are applied; pricing must be requested.

Main limitation: No public pricing is listed, and agents are billed on usage at rates that are not published.

By the AI Tool Atlas editors. Based on the vendor's official documentation; we have not tested this product hands-on. What “documented overview” means

Who Fermi Dev fits

Fermi Dev targets enterprises that want an AI layer over their business systems with an approval step before changes are applied; pricing must be requested. Based on the vendor's documentation, not on a hands-on test.

Best for: Enterprises with fragmented tools and manual workflows

Also a good fit for

Teams that want to automate operations with agents

Consider another tool if no public pricing; enterprise-oriented

Or if

Agents are billed on usage per the site, rates not published
Performance figures on homepage are vendor claims

Fermi Dev pricing and usage limits

Prices checked Sep 29, 2026 on the official US pricing page. Prices and limits change often.

Free access and trial conditions

Not stated

Paid plans: what changes as you upgrade

Usage-based direct

Usage-based source (opens in a new tab)

Usage

Agents billed on usage; rates not published

For: Enterprises

Usage caps, credits and extra costs

Agent usage fees

Not stated

What is Fermi Dev, and how does it work?

Fermi Dev describes itself as an AI Operational Brain for enterprises. It connects scattered business tools, builds a unified model of entities, relationships, policies and workflows, and lets teams ask questions in natural language about their own systems. The platform has three parts: The Brain (unified operational model), The Conductor (a Simulate, Approve, Apply flow for safe changes) and The Agents (pre-built and custom agents that execute work). A separate API documentation site covers authentication, data connectors, chat sessions, tasks and Python and TypeScript SDKs.

Fermi Dev's official site: how the product presents itself. fermi.dev, captured Oct 2, 2026

What you provide and what you get back

What you give Fermi Dev and what comes back, from its documentation

You provide

Connected business data (Gmail, Drive, Salesforce, SharePoint, SQL)
Natural-language questions

You get back

Answers across systems
Approved operational changes

Where you can use it

Platforms: Web, API
Account: Required
Connectors: Gmail, Drive, Salesforce, SharePoint, SQL
Change control: Simulate, approve, apply
Developer: API and SDKs

Best use cases for Fermi Dev

Scenarios are worked out by our editors from the documentation; the actual result depends on your input and plan.

Ask natural-language questions across connected business systems

Who: Operations teams
You provide: Questions about connected systems
Expected result: Fermi Dev answers the question using a unified model built from the connected business systems.
Plan needed: Contact vendor
Limitation: Rates are unpublished, and answers depend on the connectors that have been configured. source (opens in a new tab)

Automate order processing, support and invoice workflows with agents

Who: Back-office teams
You provide: Orders, tickets or invoices
Expected result: Agents run the order, support or invoice workflow, with usage billed at unpublished rates.
Plan needed: Usage billed per site
Limitation: The quality of the workflows is the vendor's own claim and was not verified. source (opens in a new tab)

Simulate and approve operational changes before applying them

Who: Managers
You provide: A proposed change
Expected result: Fermi Dev shows the simulated result of the proposed change, which the manager approves before it is applied.
Plan needed: Contact vendor
Limitation: Connectors must be configured before a change can be simulated. source (opens in a new tab)

Key features and their practical limits

Feature overview on the official site. fermi.dev, captured Oct 2, 2026

Unified operational model (The Brain)

Builds one model of operations from connected systems. Operations teams can ask questions across connected tools in plain language instead of searching each one.

Access: Usage-basedLimit: Connectors must be set up before the model contains any data. source (opens in a new tab)

Simulate, Approve, Apply change workflow

Runs changes through simulate, approve, apply steps. Managers can see what a change would do and approve it, which lowers the chance of a bad change going live.

Access: Usage-basedLimit: The flow requires a person to approve each change. source (opens in a new tab)

Pre-built agents and custom agent builder

Provides pre-built agents plus a builder for custom ones. Teams can start from ready agents and build their own for tasks the ready ones do not cover.

Access: Usage-basedLimit: The list of pre-built agents was not read from the pages we could access. source (opens in a new tab)

Data connectors (Gmail, Google Drive, Salesforce, SharePoint, SQL databases and more)

Connects Gmail, Google Drive, Salesforce, SharePoint and SQL databases. Teams can pull data from common business tools without writing integration code.

Access: Usage-basedLimit: The full connector list is in the API documentation, which we could not read. source (opens in a new tab)

Pros, cons and deal-breakers

Reasons to choose Fermi Dev

Public API documentation with SDKs Public API documentation with Python and TypeScript SDKs lets developers connect Fermi Dev to their own systems. documented source (opens in a new tab)
Many documented data connectors Many data connectors are documented, so teams can connect common tools such as Gmail, Salesforce and SQL databases. documented source (opens in a new tab)
Change flow requires approval before applying Changes go through a simulate, approve and apply flow, so an approver can see the effect before anything is changed. documented source (opens in a new tab)

Check before paying for Fermi Dev

No public pricing; enterprise-oriented No public pricing is listed and the product is aimed at enterprises, so smaller teams cannot see whether it fits their budget. documented source (opens in a new tab)
Agents are billed on usage per the site, rates not published Agents are billed on usage and the rates are not published, so the monthly cost is hard to predict. documented source (opens in a new tab)
Performance figures on homepage are vendor claims The performance figures on the homepage are the vendor's own claims, so they should be tested before you rely on them. documented source (opens in a new tab)

How to use Fermi Dev for automating a business process with agents

Set up Fermi Dev

Read the Fermi docs at docs.fermi.dev.
Contact the vendor for access.
Connect your first data source.

Example: automating a business process with agents

Pick a pre-built agent.
Ask a question across systems.
Simulate and approve a proposed change.

Review and export the result

Confirm the answers match source data.
Check the audit of the applied change.

Example prompt suggested by our editors (not a recorded output of the product)

Which invoices are overdue and who owns the account?

Fermi Dev API

API access and separate billing

An API is available, billing not documented. Public API documentation with SDKs. API documentation ↗

Privacy, data use and commercial rights

Summarized from the vendor's current policies; this is not legal advice and a vendor's badge is not an independent audit.

How your inputs and outputs are handled

Not stated on the pages read

Commercial use and plan restrictions

Not stated on the pages read

Policies: fermi.dev/privacy

Other tools to consider instead of Fermi Dev

"Better suited" is based on documented features and pricing, not on a head-to-head test.

Zapier: better suited to

n8n: better suited to

Alternatives
Alternative	When to choose it	Pricing	Limitation
Zapier		—	—	Compare
n8n		—	—	Compare

Explore Fermi Dev further

Best Fermi Dev alternativesTools for the same job, by need and starting price.Best AI writing and productivity toolsOur picks in this category, compared by price and free tiers.

Tools and guides near Fermi Dev

More productivity & writing tools

Fermi Dev user reviews

No user reviews yet.

Used Fermi Dev? Be the first to share your experience.

Write a review

Fermi Dev FAQ

Does Fermi have public pricing?

No. Agents are billed on usage per the site, but rates are not published. source (opens in a new tab)

Which systems connect?

Gmail, Google Drive, Salesforce, SharePoint and SQL databases, among others. source (opens in a new tab)

What is the Simulate, Approve, Apply flow?

Changes are simulated first and need approval before they are applied. source (opens in a new tab)

Is there an API?

Yes, public API documentation with SDKs exists at docs.fermi.dev. source (opens in a new tab)

Sources and review methodology

Official sources and verification dates

Fermi Dev homepage homepage · checked Oct 4, 2026
Fermi API documentation homepage · checked Oct 4, 2026

Not verified: Pricing; Privacy terms; Full connector list; US availability.

How we documented and maintain this page

Every fact about Fermi Dev above comes from the 2 official pages listed here, last compared on Sep 29, 2026; we have not run Fermi Dev ourselves, so it has no editorial score. How we check and re-check pages.

Article updated Oct 2, 2026; prices checked Sep 29, 2026. Outbound links to vendors are plain links; we do not earn commissions. How we review · Report an error