Drop in is a browser extension that enables users to add custom features and integrations to any web application they use. Instead of waiting for vendors to implement requested functionality or writing custom scripts, users can describe their ideal feature in plain English and Drop in builds it directly into the web page interface.

The product allows users to add custom workflows, CRM integrations, and smart automations to web applications. It provides features like export buttons, dark mode toggles, smart reply suggestions, custom filter controls, and summary info cards. Users can organize features per site and integrate with tools like HubSpot, Airtable, and Notion to move real data between applications.

Drop in works by adding a visual layer on top of existing web applications without changing the underlying product. Users describe what they need in plain English (such as "Add an 'Add to HubSpot' button here" or "Create a qualification view in this CRM") and the extension builds the requested functionality directly into the page. Features persist across sessions and can be toggled on or off without affecting the original application.

The benefits include eliminating the need to wait for vendor updates or write custom code, enabling users to customize their workflow tools exactly as needed. Use cases include adding open roles displays in HubSpot, exporting ChatGPT conversations, implementing quick reply suggestions in messaging apps, collecting leads from Google Maps, and adding missing functionality like Maps tabs to Google search results.

Drop in targets users of web applications who want to customize their tools without coding knowledge. It works with any web app that runs in a browser, with optimization for popular tools like ChatGPT, HubSpot, and LinkedIn. The extension can be used individually or shared across teams to standardize UI improvements.