The #1 cloud browser for AI workloads.

Highest stealth score of any cloud browser on Stealth Bench V1. Your agents browse protected sites without getting blocked. Pre-warmed sessions, built-in proxies, zero infrastructure.

Launch Browser Get started
Desktop
macOS Windows Linux
#1 stealth
~4ms latency
100x cheaper
99.9% uptime
agent.ts 
import { SpiderBrowser } from "spider-browser"

const browser = new SpiderBrowser({
  apiKey: process.env.SPIDER_API_KEY!,
  mode: "cua",
})
await browser.init()
await browser.page.goto("https://example.com")

// AI agent completes tasks autonomously
const result = await browser.agent({ maxRounds: 20 })
  .execute("Find the cheapest flight to Tokyo")
await browser.close()
✓ agent complete | 8 steps | $0.014

Key Features

Speed

~4ms command latency

Pre-warmed browsers with zero cold start. Your first command executes in milliseconds, not seconds. No waiting for containers to spin up.

Cost

Pay only for what you use

$1/GB bandwidth, $0.001/min compute. No monthly minimum, no seat fees, no hidden charges. Stealth, proxies, and CAPTCHA solving are included.

Reliability

99.9% success rate

Smart retry, stealth escalation, and automatic proxy rotation. Sessions recover on their own, even on heavily protected sites.

Built in Rust Zero Cold Start Anti-Detect Stealth Proxy Rotation CAPTCHA Solving AI Extraction Screenshots Automation Session Replay Structured Data
Stealth Bench V1

Your agents never get blocked

Spider scored 84.5% across 71 anti-bot tasks on Stealth Bench V1. That is the highest of any cloud browser tested. Browserbase scored 41.9%. Local headless Chrome scored 2.2%.

Stealth Bench V1: Spider leads with 84.5% success rate across 71 anti-bot tasks. Spider 84.5% Browser Use 81.4% Anchor 76.8% Onkernel 67.1% Browserless 54% Steel 47.2% Browserbase 41.9% Hyperbrowser 39.9%

Stealth Bench V1 evaluates browser stealth across 71 anti-bot protection tasks. Higher is better. View methodology on GitHub

How it works

Three steps from install to production. No servers, no Docker, no browser management.

1

Connect a browser

Install the SDK and call init(). Spider provisions a pre-warmed browser in the cloud and returns a live session in milliseconds.

2

Navigate and interact

Use familiar APIs like goto(), act(), and extract() to control the browser. Stealth, proxies, and retries are handled automatically.

3

Get your data

Receive structured JSON, screenshots, or session recordings. Review every step, then close the session and pay only for what you used.

What you can build

One API for scraping, automation, extraction, and AI agent workflows.

Scraping

Web scraping at scale

Scrape any site, even behind anti-bot protection. Stealth, proxy rotation, and CAPTCHA solving are automatic. Just point it at a URL and get clean data back.

Extraction

Structured data extraction

Extract product listings, pricing, contact info, or any structured data. Use natural language prompts or typed schemas to get exactly what you need.

Automation

Browser automation

Automate login flows, form submissions, and multi-step workflows. Use plain English commands or standard browser APIs. No fragile selectors needed.

Monitoring

Price and change monitoring

Track prices, inventory, or content changes across any number of sites. Smart retry means you always get the data, even from unreliable pages.

AI Agents

AI agent browsing

Give your AI agent a real browser. The agent() API lets any LLM browse, click, fill forms, and complete multi-step tasks on its own.

Data Pipelines

Feed your data pipeline

Ingest JavaScript-heavy pages into RAG pipelines, data warehouses, or search indexes. Spider renders SPAs and returns clean, structured content.

Your language, same API

Official SDKs for TypeScript, Python, and Rust. Same API surface across all three.

TypeScript npm 
import { SpiderBrowser } from "spider-browser"
const b = new SpiderBrowser({ apiKey })
await b.init()
await b.page.goto("https://example.com")
const data = await b.extract("Get prices")
Python pip 
from spider_browser import SpiderBrowser
async with SpiderBrowser(api_key=key) as b:
    await b.page.goto("https://example.com")
    data = await b.extract("Get prices")
Rust cargo 
use spider_browser::SpiderBrowser;
let b = SpiderBrowser::new(api_key)
    .init().await?;
b.goto("https://example.com").await?;
let data = b.extract("Get prices").await?;
npm → PyPI → crates.io →

Why Spider Browser

Skip the infrastructure. Ship the agent.

Feature Spider Self-hosted Other clouds
Stealth Bench V1#1 (84.5%)N/A≤81%
Stealth & anti-botBuilt-inDIYPartial
CAPTCHA solvingAutomaticManualAdd-on
Smart retryAutoCustomLimited
Built in RustYesN/ANo
AI extractionNativeNoneNone
Command latency~4ms~50ms~20ms
Cold start0ms3-10s1-5s
Session recordingBuilt-inCustomExtra cost

Frequently asked questions

What is Spider Browser?

Spider Browser is a cloud browser API built for developers who need fast, reliable browser sessions without managing infrastructure. You get pre-warmed browsers on demand with built-in stealth, proxy rotation, CAPTCHA solving, and smart retry. Use it for web scraping, automation, data extraction, testing, or AI agent workflows.

How is Spider Browser different from Puppeteer or Playwright?

Puppeteer and Playwright require you to manage your own browser infrastructure: servers, Chrome versions, memory, scaling. Spider Browser gives you pre-warmed browsers in the cloud that are ready in milliseconds. Stealth, proxy rotation, CAPTCHA solving, and automatic retries are all handled for you. You write the logic, Spider handles everything else.

What can I use Spider Browser for?

Anything that needs a real browser. Common use cases include web scraping at scale, price monitoring, lead generation, competitive intelligence, automated testing, AI agent browsing, and data pipeline ingestion. If a site requires JavaScript rendering or login flows, Spider Browser handles it.

What programming languages are supported?

Spider Browser has official SDKs for TypeScript (npm install spider-browser), Python (pip install spider-browser), and Rust (cargo add spider-browser). All three share the same API surface: init, goto, act, observe, extract, and agent.

How does Spider Browser handle anti-bot protection?

Spider scored 84.5% on Stealth Bench V1, ranking #1 across all cloud browsers tested on 71 real anti-bot tasks. Stealth levels escalate automatically on failure, CAPTCHA solving is built in, and proxy rotation handles IP-based blocks. You do not need to configure anything. Just send your request and Spider handles the rest.

What does Spider Browser cost?

Pricing is simple: $1 per GB of bandwidth and $0.001 per minute of compute. No monthly minimum, no contracts. You pay only for what you use and get 500 free credits on sign-up with no credit card required. Stealth, proxies, and CAPTCHA solving are all included in the price.

How many concurrent sessions can I run?

Spider Browser supports up to 100 concurrent sessions with zero cold start. Each session runs on a pre-warmed browser instance, so there is no boot time. Combined with smart retry and automatic recovery, it is built for high-volume workloads on even the most protected sites.

Can AI agents use Spider Browser?

Yes. Spider Browser has built-in support for AI agent workflows. The agent() API lets any LLM browse, click, fill forms, and complete multi-step tasks autonomously. The act(), observe(), and extract() methods give agents fine-grained control using plain English commands.

Start automating in minutes

2,500 free credits on sign-up. No credit card, no infrastructure, no cold starts.

Get started free Read the docs