Auto Browser vs FillApp

Auto Browser is a free Chrome extension that uses an AI agent in the browser’s side panel. It reads a webpage’s accessibility tree and can click, type, scroll, navigate, fill forms, and handle research tasks described in plain English. Pages exposing WebMCP tools can let it use those tools instead of the page DOM. Supported providers include Chrome Built-in AI (Gemini Nano), Google Gemini, OpenRouter, and local OpenAI-compatible endpoints such as Ollama and LM Studio. You can change providers during a conversation without losing its history. Write actions require approval, arbitrary JavaScript prompts for approval, and banking, government, and healthcare origins are blocked by default. The extension is free to install at free; Google Gemini and OpenRouter charge per request using your API key. Chrome 126 or newer is required for basic use. Attachments can be images or audio up to 10 MB each.

FillApp is a paid AI agent for completing web and PDF forms with saved information or custom instructions, and for automating browser workflows in existing sessions. Fill Mode handles forms, Agent Mode performs multi-step work across tabs, and Assist Mode summarizes pages, PDFs, and images or answers questions about them. Supported fields include text, dropdowns, checkboxes, dates, and long text blocks. Saved datasets become reusable snippets inserted with @SnippetName. The agent can request confirmation before risky actions such as submitting forms or deleting data. Named integrations include Google Forms, Microsoft Forms, Salesforce, HubSpot, Jotform, Airtable, Workday, Greenhouse, Atlassian, and ServiceNow. FillApp is available as a browser extension and web app. It says page content is accessed when a conversation or agent engagement starts, not monitored in the background. Prompts and needed context may be sent to OpenAI and Anthropic. Chat sessions clear after the session, while account and snippet data remains until deletion or one year of inactivity. Starter costs $14.99 a month; Pro costs $29.99 a month. A 7-day trial is listed.