AgentIndex icon
AgentIndex
opentabs logo
opentabs
★ 990
vs
plasmate logo
plasmate
★ 38

opentabs vs plasmate

opentabs: OpenTabs reverse-engineers internal APIs of web apps and exposes them as MCP tools. It consists of an MCP server and a Chrome extension that routes API calls through your browser sessions, enabling fast and deterministic AI interactions without screenshots or DOM scraping. It supports over 100 plugins covering ~2,000 tools.; plasmate: Plasmate compiles HTML into a Semantic Object Model (SOM), a structured representation that LLMs can reason about directly. It runs JavaScript via V8, supports Puppeteer via CDP, and produces output that is 10-800x smaller than raw HTML. It is purpose-built for AI agent pipelines, with MCP, Vercel AI SDK integrations, and over 60 ecosystem integrations.

01

TL;DR

opentabs logo
opentabsBrowser Automation · ★ 990

AI agents performing actions on web apps (e.g., checking stock portfolio, ordering food)

Read opentabs full review →
plasmate logo
plasmateBrowser Automation · ★ 38

AI agent web browsing and structured data extraction

Read plasmate full review →
02

Side-by-Side Comparison

Field
opentabs logoopentabs
plasmate logoplasmate
Category
Browser Automation
Browser Automation
Stars
★ 990
★ 38
License
MIT
Apache-2.0
Install Command
npm install -g @opentabs-dev/cli && opentabs start
curl -fsSL https://plasmate.app/install.sh | sh
Updated
6d ago
1d ago
Open Source
Yes
Yes
Website
↗ Visit
↗ Visit
GitHub
↗ GitHub
↗ GitHub
Tags
ai-agents, browser-automation, chrome
agent-web-protocol, ai-agents, browser-engine
03

Features

opentabs logoopentabs
01Reverse-engineers internal web app APIs
02Works through existing browser sessions
03Over 100 plugins with ~2,000 tools
04Built-in browser tools (screenshots, clicking, typing, etc.)
05Permission controls and audit logging
plasmate logoplasmate
01Semantic Object Model (SOM) compression: 10-800x smaller than raw HTML
02JavaScript execution via embedded V8 engine
03CDP compatibility for Puppeteer integration
04Native AWP protocol with 7 methods for agent interaction
05MCP tool server for Claude Desktop, VS Code Copilot, etc.
04

Use Cases

opentabs logoopentabs
↳AI agents performing actions on web apps (e.g., checking stock portfolio, ordering food)
↳Automating tasks across multiple services without separate API keys
↳Building and sharing plugins for custom workflows
plasmate logoplasmate
↳AI agent web browsing and structured data extraction
↳MCP tool server for LLM-based assistants (e.g., Claude Desktop)
↳Vercel AI SDK integration for agent tool calling
FAQ

FAQ

What is the difference between opentabs and plasmate?
Both opentabs and plasmate are in the Browser Automation category. opentabs has 990 stars, while plasmate has 38 stars.
Which is better, opentabs or plasmate?
The best choice depends on your use case. Choose opentabs if AI agents performing actions on web apps (e.g., checking stock portfolio, ordering food), and plasmate if AI agent web browsing and structured data extraction.
Is opentabs free or open source?
Yes, opentabs is open source on GitHub (MIT).
Is plasmate free or open source?
Yes, plasmate is open source on GitHub (Apache-2.0).
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Related

Alternatives to opentabs →Alternatives to plasmate →opentabs details →plasmate details →