# Browser Use vs Kosa8

Browser Use records 1,206,376 monthly visits with +41.1% month-over-month growth and Freemium, Paid, Contact for Pricing pricing. Kosa8 records 0 monthly visits with 0% growth and subscription pricing.

| Metric | [Browser Use](https://openaitools.app/tool/browser-use) | [Kosa8](https://openaitools.app/tool/kosa8) |
| :--- | :--- | :--- |
| Website URL | https://browser-use.com | https://kosa8.com |
| Categories | AI Agent, AI API, AI Browsers, Large Language Models (LLMs) | AI Agent, AI Developer Tools |
| Pricing Model | Freemium, Paid, Contact for Pricing | subscription |
| Monthly Visits | 1,206,376 | 0 |
| MoM Growth Rate | +41.1% | 0% |
| Primary Market | United States | Global |
| Direct Visits | 625,168 | 0 |
| Review Score | 4.7 | 4.5 |
| Saved Count | 0 | 0 |
| Supported Platforms | Website | Website |

## Browser Use

Browser Use frames an agent as two halves: a harness that decides what to do, and a browser that executes it. The harness reads the page, plans clicks and typing, and can fall back to raw JavaScript evaluation when needed; the browser is a real Chromium instance that renders pages exactly as a person would see them. You hand over an instruction like "buy trail shoes, size 42, under $120" and receive a result plus structured data.

The company publishes its benchmarks publicly, which is unusual in this category. Their stealth browsers are reported to get through on 90.5% of a 100-site test against several competitors, and their shopping agent completes 91.8% of 500 stores. The Browser Harness component is free and open source and is used as the browser tool inside Claude Code and Codex-style agents.

For teams that need to run at scale, Browser Use offers cloud or on-premise browsers, US or EU execution with EU runs staying in Frankfurt, SOC 2 Type II compliance, and HIPAA coverage on enterprise plans. Pricing is usage-based for the hosted services, with a small free credit to start.

**Pricing & Plans:** Freemium with usage-based paid tiers: web agents around $0.006 per task, stealth browsers around $0.02 per browser hour, and the Browser Harness free and open source. $1 in free credit on signup; enterprise and on-premise are contact-for-pricing.

- **Natural-language web agents:** Describe the task and get structured JSON back, handling multi-step flows behind logins without hand-written selectors.
- **Stealth cloud browsers:** Managed Chromium instances with residential IPs that are benchmarked for getting past bot detection and CAPTCHAs.
- **Browser Harness (open source):** A free, open-source harness that plugs into coding agents; benchmarked as the most token-efficient browser tool of the set tested.
- **Cloud or on-premise deployment:** Run browsers in your own network or in managed US/EU cloud regions, with EU data staying in Frankfurt.
- **Compliance and benchmarks:** SOC 2 Type II, HIPAA on enterprise plans, and public head-to-head benchmark results.

**Strengths:** Industry-leading benchmark results published openly; Open-source harness means no lock-in for local development; Usage pricing is granular and starts with a free credit; Enterprise-grade options: on-prem, EU residency, SOC 2 Type II

**Limitations:** Per-task and per-hour costs can add up quickly at high volume; Stealth browsing raises ethical and terms-of-service questions teams must handle; Cloud usage requires an API key and some engineering integration

[Profile (Markdown)](https://openaitools.app/tool/browser-use.md)

## Kosa8

Kosa8 targets the gap between agents that are useful and agents that are safe to leave unattended. Coding agents such as Claude Code and Codex normally inherit your shell, SSH keys and cloud credentials, so a single poisoned dependency or injected instruction can reach everything you own. Kosa8 instead gives each agent its own sealed virtual machine: a real VM with its own kernel and disk rather than a shared-kernel container. It sees one mounted folder — typically the repository — while API keys remain on your computer and only placeholder values appear inside.

The product is built around control of three things: files, credentials and network. The network is closed except for hosts the agent genuinely needs, routed through an egress broker whose rules are enforced on the host where nothing inside the sandbox can tamper with them. Bad runs are undone with a rewind instead of a rebuild, and a running sandbox can be forked into several live copies so parallel attempts are cheap. Governance features extend this to regulated teams: signed organisation policies, two-person approvals for risky actions, CUI labels that can only rise, FIPS 140-3 builds and signed evidence packages that an auditor reviews without trusting you.

Deployment is deliberately local-first. Kosa8 installs in one line on Apple-silicon Macs, x86-64 Linux, and Windows 11 through WSL2 in preview, and can also run in your own cloud or fully air-gapped. A Docker-compatible API means existing Docker CLI and Compose workflows keep working, and ready-made kits launch Claude Code, Codex, Gemini or your own agents. Security and incident-response teams use the same primitives for malware analysis and training ranges, where detonations produce signed reports and each trainee gets a live clone that resets in seconds.

**Pricing & Plans:** Every plan is free for 14 days with no card required, and each tier includes monthly Kosa8 Cloud credit for cloud sandboxes. Solo is $29/month (4 agents at once, 64 GB of sandboxes, $10 Cloud credit), Pro is $89/month (16 agents, 128 GB, $25 credit), Team is $169 per person per month from 3 people (48 shared agents, 256 GB, $40 credit per person) and Scale is $199 per person per month from 5 people (160 shared agents, 500 GB, $50 credit per person). Billing is cancel-any-time from the billing portal, and annual payment saves roughly 17%. Air-gapped and Enterprise terms are negotiated directly.

- **Sealed VM per agent:** Every agent runs in a genuine VM with its own kernel and disk on Apple's Virtualization framework or KVM, not in a container that shares the host kernel.
- **Credential protection by placeholder:** The sandbox sees one mounted folder and holds placeholder values instead of real API keys, which stay on your host and are brokered only to approved hosts.
- **Host-enforced network egress control:** The network is closed by default; traffic flows only to allow-listed hosts through a broker whose rules live on the host, out of reach of anything inside the sandbox.
- **One-second snapshots and rewind:** Checkpoint before risky work and restore a running machine, processes included, in about a second rather than rebuilding it from scratch.
- **Forking and Docker compatibility:** Clone a running sandbox into multiple live copies, keep the run that passes, and give each trainee or task its own reset-on-demand machine.
- **Tamper-evident audit and approvals:** Every action is hash-chained and marked human or agent, risky steps can require two named approvers, and exports are signed so a third party can verify them offline.

**Strengths:** True VM-level isolation with a per-agent kernel instead of shared-kernel containers; API keys never enter the sandbox, and network egress is closed by default and allow-listed; Fast snapshots, restores and forks make parallel agent runs and disposable ranges practical; Docker CLI and Compose work unchanged, so existing tooling and images carry over

**Limitations:** No permanently free tier — after the 14-day trial you must pick a paid plan starting at $29/month; Host-folder mounts read at roughly a third of native disk speed, so heavy builds should stay inside the sandbox; Full isolation is best on Apple-silicon Macs and x86-64 Linux; Intel Macs, Windows 10/ARM and JioOS need a paired host; Team and Scale tiers are priced per person with seat minimums, which raises the entry cost for small groups

[Profile (Markdown)](https://openaitools.app/tool/kosa8.md)

## Frequently Asked Questions

### How do Browser Use and Kosa8 compare in monthly traffic?

Browser Use has 1,206,376 monthly visits, while Kosa8 has 0. Traffic estimates describe audience size, not product quality.

### How do their growth rates compare?

Browser Use has a month-over-month growth rate of +41.1%; Kosa8 has 0%.

### How does pricing compare?

Browser Use: Freemium, Paid, Contact for Pricing. Freemium with usage-based paid tiers: web agents around $0.006 per task, stealth browsers around $0.02 per browser hour, and the Browser Harness free and open source. $1 in free credit on signup; enterprise and on-premise are contact-for-pricing. Kosa8: subscription. Every plan is free for 14 days with no card required, and each tier includes monthly Kosa8 Cloud credit for cloud sandboxes. Solo is $29/month (4 agents at once, 64 GB of sandboxes, $10 Cloud credit), Pro is $89/month (16 agents, 128 GB, $25 credit), Team is $169 per person per month from 3 people (48 shared agents, 256 GB, $40 credit per person) and Scale is $199 per person per month from 5 people (160 shared agents, 500 GB, $50 credit per person). Billing is cancel-any-time from the billing portal, and annual payment saves roughly 17%. Air-gapped and Enterprise terms are negotiated directly.

## Alternatives

| # | Tool Name | Monthly Visits | MoM Growth Rate | Pricing Model | Summary | Profile (Markdown) |
| :--- | :--- | :--- | :--- | :--- | :--- | :--- |
| 1 | [Apify](https://openaitools.app/tool/apify) | 4,147,762 | +3.9% | Freemium, Contact for Pricing | Features a massive marketplace of pre-built web scrapers and automation actors, but less focused on autonomous custom LLM agent frameworks. | [.md](https://openaitools.app/tool/apify.md) |
| 2 | [Composio](https://openaitools.app/tool/composio) | 2,782,603 | +22.8% | Freemium, Contact for Pricing | Give your AI agents secure, authenticated access to 1,700+ apps | [.md](https://openaitools.app/tool/composio.md) |
| 3 | [Firecrawl](https://openaitools.app/tool/firecrawl-dev) | 1,828,239 | -1.9% | Freemium, Contact for Pricing | Excels at converting websites into clean LLM-ready markdown instantly, but does not provide interactive multi-step browser agent execution. | [.md](https://openaitools.app/tool/firecrawl-dev.md) |
| 4 | [TinyFish](https://openaitools.app/tool/tinyfish) | 1,124,952 | +199.7% | Freemium, Contact for Pricing | Provides cloud browsers and web automation APIs, but lacks a native open-source Python framework for local developer agent building. | [.md](https://openaitools.app/tool/tinyfish.md) |
| 5 | [Bright Data](https://openaitools.app/tool/bright-data) | 802,752 | -5.9% | Free Trial, Paid | Web data infrastructure for scraping, proxies, and AI-ready datasets | [.md](https://openaitools.app/tool/bright-data.md) |
| 6 | [BLACKBOX.AI](https://openaitools.app/tool/blackbox-ai-1) | 622,975 | -27.2% | Free Trial, Paid | High-trust frontier inference, encrypted end to end | [.md](https://openaitools.app/tool/blackbox-ai-1.md) |
| 7 | [Browserbase](https://openaitools.app/tool/browserbase) | 283,597 | -8% | Freemium | Provides managed cloud infrastructure for browser agents, but lacks the specific local open-source framework code of Browser Use. | [.md](https://openaitools.app/tool/browserbase.md) |
| 8 | [Browserless](https://openaitools.app/tool/browserless) | 185,543 | -21.2% | Freemium, Paid, Contact for Pricing | Delivers scalable headless browser hosting via APIs, but requires manual script building rather than autonomous agent orchestration. | [.md](https://openaitools.app/tool/browserless.md) |
| 9 | [Agent 37](https://openaitools.app/tool/agent-37) | 180,030 | +24.2% | Free Trial, Contact for Pricing | The low-cost cloud sandbox where AI agents actually live | [.md](https://openaitools.app/tool/agent-37.md) |
| 10 | [Coder](https://openaitools.app/tool/coder) | 149,417 | -12.8% | Free Trial, Contact for Pricing, Free | Self-hosted cloud development environments and AI coding agents for enterprise teams | [.md](https://openaitools.app/tool/coder.md) |

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Source: https://openaitools.app/compare/browser-use-vs-kosa8

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