Pillar Sky Background

The Product Copilot

Pillar is the Open Source SDK for building AI agents into your product. It takes action, and gets work done for your users.

Get Started

[01] HOW DOES IT WORK

See how it could work in your app

banking.example.com/payments
BK

From CRM to banking, Pillar turns plain-language requests into completed actions.

Try it live

Explore real apps with Pillar built in. Click to open an interactive demo.

Superset demo preview
Superset
Grafana demo preview
Grafana

[02] PLATFORM

Built for Engineers who ship

One Install, MCP Included

npm install and go. Ships with a standards-compliant MCP server—Claude, ChatGPT, Cursor, and any MCP client connect out of the box.

Managed Knowledge

We crawl your docs and integrate with your content sources. RAG that stays fresh, automatically.

Full Control

Define actions in your frontend code. Same session, same auth—no token passing. Can call your backend too.

Self-Improving

When a user gets stuck, easily copy a prompt from Pillar to your AI coding tool to create a new action directing the model on what to do.

[03] SAFETY BY DESIGN

Why Client-Side actually works

AI assistants today can only chat. Pillar can act—because it runs where your users do.

GET /user_data
Your Session started1s
Remember?
3EE;
1EBE3;
#FFFFFF;
B1B1B;
--MUTED:#6B6B6B;
Positive response
623kb in 1ms
fetch('/api/orders/289/status', {
method: 'GET',
'Authorization <token>',
'ContentType: application/json'
});
.then(response => response.json())
.then(data => console.log(data));
Data saved successfully!

Same Session = Real Power

Pillar runs in the user's browser with their session—and registers actions as WebMCP tools. No proxy servers, no token forwarding. When navigator.modelContext ships, your app is already wired.

Full Control

Your actions are client defined. Re-use patterns, forms, and CSS that already exist. Inline in chat or directly as modals.

Native Speed

UI actions happen locally, instantly. No round-trip to external servers. Feels native because it is native.

Your Infrastructure

Actions call your APIs with the user's existing auth. You control what's possible. Pillar just orchestrates.

[04] DEPLOY

Deploy in minutes,
not days

Connect your existing content, define what users can accomplish, and embed it in your product.

You're ready for users and agents and AI tools to build off of—we handle the infrastructure complexity.

Connect Your Knowledge

~5min

Create Actions

~2hrs

Embed in Your App

~1hr

Improve Over Time

Ongoing

Define actions in your frontend. Same codebase, same deploy pipeline, same auth context.
Nothing new to operate.

[05] PRICING

Usage-Based Pricing

Pay for what you use. Start free, scale as you grow.

Only substantive AI responses count — greetings and simple acknowledgments are free.

FREE

Try Pillar risk-free

$0

50 responses

Get Started Free

No card required

Actions (execute, pre-fill)
Analytics dashboard
Widget customization
HOBBY

For side projects

$19per month

100 responses/mo

Get Started

Then $0.25/response

Actions (execute, pre-fill)
Analytics dashboard
Widget customization
PRO

For production apps

$99per month

400 responses/mo

Get Started

Then $0.20/response

Everything in Hobby
Priority support
GROWTH

For scaling apps

$249per month

1,500 responses/mo

Get Started

Then $0.15/response

Everything in Pro
Custom integrations

Need enterprise features like SSO, SLA, or custom integrations? Contact us for enterprise pricing

A Product Copilot that executes not just explains.

Stop building chat interfaces. Start shipping actions.

Get Started