User installs extension -> Extension integrates with Gmail and Upstream web app -> User logs into Upstream service -> Extension provides UI enhancements in Gmail for AI drafting and channel organization.

目标用户: Gmail users seeking improved productivity and email organization.

The extension source is heavily minified/bundled (especially content.js), making detailed feature analysis difficult.
Cannot confirm if the Upstream web service has paid tiers without inspecting the web app source or network traffic.
The extension relies on the Upstream backend service for AI features, so functionality depends on external API availability.

付费分析

未识别到付费功能

No evidence of paid features, billing logic, subscription gating, or payment processing in the extension source code. The extension uses local storage for user preferences and communicates with the Upstream service, but does not implement any upgrade flows or premium feature locks itself. While the destination service (Upstream) may have paid plans, the extension itself appears to be free.

置信度: 90
支付平台: --
来源: AI / 高
需要登录: 是
登录理由: The extension is designed to enhance Gmail by integrating with the Upstream web application (app.upstream.do). The background script opens the Upstream website on install/update, and the content script for app.upstream.do registers the user's email with the Upstream service. The core features (AI Drafts, Channels) require an account on the Upstream platform to function, as evidenced by the email registration flow and the dependency on the external app.

权限风险

中风险权限组合

根据声明权限和站点访问权限，评估插件的访问范围与潜在敏感度。

扩展能力较强：storage、activeTab、tabs

发布者

Upstream

Upstream Labs, Inc.

邮箱: [email protected]
电话: +16504859042
地址: 2093 Philadelphia Pike # 7575 Claymont, DE 19703-2424 US

上面的公开联系方式保持可见；开发者组合页对付费账号开放。

查看开发者组合页

权限

站点访问

Upstream

Upstream 媒体预览

用户增长趋势

用户增长趋势

近 7 日评分趋势

7 日评分变化

日/周/月增长表现

版本、语言与抓取信息

插件简介

最新评论快照

同类与相关插件

Claap - Sales meeting recorder

Humanlinker

Taplio X

lemlist

Kleo

Guideflow