Moli

What is Moli?

Moli is an open-source browser engine from Lexmount built for AI agents that need to read, click through and extract content from web pages without the memory cost of a full desktop browser. It runs dynamic pages and JavaScript, supports finding elements, clicking and typing, and offers storage, security features and automation protocols including CDP and WebDriver Classic and BiDi. Its distinctive design renders a page visually only when an image is requested, and agents can switch images, fonts, audio and video loading on individually. In Lexmount's internal agent workload test, Moli peaked at 102.46 MiB of memory, about 71% below Chromium. You can run the standalone binary locally for free, or use Moli inside Lexmount's managed Cloud Browser, which also offers Chromium. Cloud Browser plans are bought per project: Free is $0, Pro is $12.00 for one month, Pro+ is $60.00 and Enterprise is $180.00.

Use cases

• Extract content from dynamic web pages
• Automate clicks and typing for agents
• Fetch pages as structured data
• Run agent browsing with low memory
• Capture screenshots and PDFs on demand
• Run managed remote browser sessions

Who it's for

• AI agent developers
• Automation engineers
• Data extraction teams
• Developers

Why use Moli

• Lower memory use than a standard Chromium session, according to Lexmount's internal test, which leaves room for more parallel agent tasks.
• Agents see a page's structure and can act on it, and only trigger full rendering when they need an image.
• You choose between running the engine yourself for free and paying for managed sessions in the cloud.
• Standard automation protocols mean it can fit into existing CDP or WebDriver tooling.
• Resource loading controls let an agent skip heavy media it does not need.

Moli features

• Dynamic page and JavaScript execution
• Element finding, clicking and typing
• Fetch, XHR and WebSocket networking
• Cookies, IndexedDB and OPFS storage
• On-demand layout, screenshots and PDF
• CORS, CSP and storage partitioning security
• CDP and WebDriver Classic / BiDi automation protocols
• Per-resource switches for images, fonts, audio and video
• Managed Cloud Browser with a choice of Moli or Chromium

Moli integrations

• Chromium
• Playwright

How to get started with Moli

1. Download the prebuilt Moli binary from the Lexmount GitHub project, or let your agent install it using the published skills.
2. Use the CLI or connect through CDP or WebDriver to load a page and run its JavaScript.
3. Find elements, click, type or extract content, and request a screenshot or PDF only when you need one.
4. Alternatively, create a project at browser.lexmount.com, get an API key and start a managed Cloud Browser session with the Moli engine.
5. Pick a Free, Pro, Pro+ or Enterprise plan depending on browser hours and concurrency.

Moli limitations

• Moli renders on demand, so Lexmount advises validating visually demanding pages against your task
• Chromium extensions and persistent replay are not supported for Moli sessions in Cloud Browser
• Free Cloud Browser plan includes 10 browser hours a month and 3 concurrent sessions
• Paid Cloud Browser plans are one-month purchases with no automatic renewal

Moli pricing

Moli is open source, so you can use and self-host it for free. Paid plans start at $12 one-time, according to the official pricing page on 24 Oct 2026.

Moli plans

• Free

  $0

  • 10 hours / month of Browser hours
  • 1,000 Web Fetch requests / month
  • 3 concurrent browsers
  • 30 MB official proxy traffic

• Pro

  $12.00 one-time

  1 month

  • 100 hours / month of Browser hours
  • 25 concurrent browsers
  • 100 CAPTCHA uses / period
  • 10 Persistent Contexts
  • 1 GB official proxy traffic

• Pro+

  $60.00 one-time

  1 month

  • 500 hours / month of Browser hours
  • 10,000 Web Fetch requests / month
  • 100 concurrent browsers
  • 500 CAPTCHA uses / period
  • 50 Persistent Contexts

• Enterprise

  $180.00 one-time

  1 month

  • 1,500 hours / month of Browser hours
  • 10,000 Web Fetch requests / month
  • 250 concurrent browsers
  • 1,500 CAPTCHA uses / period
  • 200 Persistent Contexts

Plans as listed on the official pricing page on 24 Oct 2026. Prices can change and may vary by country or exclude tax. Check the official pricing page.

Moli alternatives

The main Moli alternatives listed on Debuly are Playwright, Browserbase, Hyperbrowser, Browser Use, Stagehand and Spider. The table compares pricing and platforms; order is A–Z.

1. 

   Browser Use

   Cloud browsers and hosted web agents for AI, plus an MIT-licensed open-source browser agent, billed pay-as-you-go from $0.02 per hour.

   Developer platformsAutomation and agentsCoding
   PaidVisit Browser Use (official site)
2. 

   Browserbase

   Cloud platform of headless browsers, search and fetch APIs and agent runtime for building AI agents that browse and act on the web.

   Developer platformsAutomation and agentsCoding
   FreemiumVisit Browserbase (official site)
3. 

   Hyperbrowser

   Cloud infrastructure that gives AI agents hosted Chrome sessions, isolated sandboxes, and web fetch, crawl and search APIs.

   Developer platformsAutomation and agentsCoding
   FreemiumVisit Hyperbrowser (official site)
4. 

   Playwright

   Open-source Microsoft framework for end-to-end web testing and browser automation across Chromium, Firefox and WebKit, with CLI and MCP for agents.

   Developer platformsCodingAutomation and agents
   Open sourceVisit Playwright (official site)
5. 

   Spider

   Web crawling and scraping API with cloud browsers and residential proxies, billed per request, for AI agents and data pipelines.

   Developer platformsAutomation and agentsResearch and search
   PaidVisit Spider (official site)
6. 

   Stagehand

   Open-source SDK from Browserbase for building browser agents with act, extract and observe calls in TypeScript, Python or Go.

   Developer platformsAutomation and agentsCoding
   Open sourceVisit Stagehand (official site)

Moli FAQ

Sources & verification

Facts on this page come from the official sources below, each with the date we read it. Written by Debuly; the vendor did not review this page.

Image credits

• Logo: from browser.lexmount.com · fetched 23 Oct 2026 · Vendor trademark, used only to identify the product; removed on request
• Cover: none collected yet, so a generated tile is shown.

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