Pillar
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Vim Python IDE
Pillar is an open-source copilot SDK that turns user requests into completed actions inside your product. Users ask a question, and instead of reading a help article, Pillar navigates them to the right page, pre-fills a form, or calls an API on their behalf. It runs client-side in the user's browser using their existing session and permissions.
The SDK gives your app five capabilities: answer questions using RAG search across your docs, navigate users to the right page, pre-fill forms, execute API calls, and escalate to human support through Intercom, Zendesk, or Freshdesk.
Pillar has three layers. Frontend components that drop into your app using your existing auth and CSS. A hosted reasoning engine that plans and orchestrates actions across OpenAI, Anthropic, Google, and other model providers. And a managed knowledge base that crawls and indexes your docs automatically.
Execution happens client-side. Actions run in the user's browser with their session, so the copilot can't do anything the user can't do. You define actions as functions in your frontend code. They use the user's auth tokens and hit your APIs directly. No credentials pass through Pillar's servers.
Pillar replaces the typical copilot stack (chat SDK + agent framework + vector DB + glue code) with one install. It ships with an MCP server and registers your actions as WebMCP tools for browser-based AI agents. The copilot can render custom cards using your existing React components inline in chat.
Built for product and engineering teams at B2B SaaS companies. SDKs work with React, Vue, Angular, and vanilla JavaScript. MIT-licensed, backed by Y Combinator and Matrix Partners. Pricing is usage-based, starting free (50 responses) with paid plans from $19/mo to $249/mo.
Try it at trypillar.com or browse the source on GitHub.
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Pillar's answer
We're early stage and growing โ focused on working closely with design partners in the B2B SaaS space. We're not sharing specific customer names publicly at this time.
Pillar's answer
React, Next.js, TypeScript, Python, Django, and PostgreSQL. The frontend SDKs support React, Vue, Angular, and vanilla JavaScript. Pillar uses MCP (Model Context Protocol) for tool integration and RAG for knowledge retrieval. The SDKs are open-source under the MIT license.
Pillar's answer
We kept seeing the same pattern across SaaS products: users know what they want to do but can't figure out how to do it. They search docs, open tickets, watch tutorials, and switch back to the app โ a 5 to 10 minute process for a task that should take seconds. Existing tools could explain how, but none of them could just do it. We built Pillar to close that gap โ an AI assistant that takes action inside the product, not just talks about it.
Pillar's answer
B2B SaaS teams โ specifically engineering and product leaders at Series A through Series D companies with 40 to 500 employees. These are teams that want to reduce support tickets, improve user activation, and help users get value from their product faster without building an AI copilot from scratch.
Pillar's answer
Most alternatives only solve part of the problem. Help centers answer questions but can't take action. DAPs like Pendo and WalkMe show guided tours but don't execute tasks. Building your own with CopilotKit, LangGraph, and a vector database takes months and ongoing maintenance. Pillar replaces that entire stack with a single SDK you can deploy in minutes โ one install that handles knowledge, reasoning, and action execution out of the box.
Pillar's answer
Pillar is the only copilot SDK that executes tasks inside your product instead of just answering questions. While chatbots explain how to do things, Pillar navigates users to the right page, pre-fills forms, and calls APIs on their behalf. It runs client-side in the user's browser session with their existing auth and permissions, so there's no proxy server or token forwarding needed.
Based on our record, Pillar seems to be more popular. It has been mentiond 1 time since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Pillar: a simpler, headless framework focused on the core logic of agent tool routing. - Source: dev.to / about 2 months ago
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