The Best Browser Harness Alternative

Browser Harness is Browser Use's local version. Browser Use is one of the most popular open-source AI browser agent projects: an MIT-licensed Python agent loop that lets an LLM control a browser, launching its own Chromium over the DevTools protocol and deciding actions step by step against the page state. You bring your own model API key and run it on your own machine. Browser Use's paid cloud product runs hosted browser agents with stealth and captcha-solving features, which is a different category from a local browser, so this page compares the harness: local against local. For developers building custom automation products and pipelines in Python, it's a strong, actively developed foundation, and of the five local tools we measured it posted the best completion rate of any competitor.

If you want an agent to do browser work for you, yes. ego lite plugs your existing coding agent into your real logged-in browser with no Python project and no API-key billing, and across 31 live-site jobs it finished 96.8% of tasks perfectly to Browser Harness's 83.9%, at $1.98 per completed task against $3.04. If you're building a browser-automation product or pipeline in Python, Browser Use is the better fit: it's a library designed to be embedded, and ego lite isn't an SDK.

Browser Use is the project; Browser Harness is its local version, the open-source Python agent loop you run on your own machine with your own LLM API key. Browser Use also sells a cloud product that runs hosted browser agents on their infrastructure. ego lite is a local browser, so the apples-to-apples comparison on this page is against Browser Harness; if you're weighing hosted browser infrastructure, see our Browserbase page instead.

We ran both tools on the same 31 browser automation tasks on live websites, driven by the same pi agent with the same model (gpt-5.6-sol, thinking effort max) and graded by the same written checklist. Each tool keeps its better of two full runs, so a failed task still counts. ego lite finished 30 of 31 tasks perfectly (96.8%) at $1.98 per completed task on 30.3 model turns; Browser Harness finished 26 of 31 (83.9%) at $3.04 on 51.2 turns, the best completion rate of any competitor measured. Browser Use's hosted cloud product was not part of the run; the comparison is local against local. The tasks, the checklists, and the raw results are open source in the ego-browser-benchmark-framework repository on GitHub, so every number can be audited or reproduced.

Browser Harness can, with manual configuration, and it's a common source of friction. The --profile flag copies your live Chrome profile into a temp directory, and on Windows that copy fails outright while Chrome is running and holding file locks, so the workaround is closing Chrome first. Connecting to an already-running Chrome over CDP works too, but Chrome 136 and later blocks CDP on your default profile, so most setups end up on a separate, non-default one. In ego lite, the real profile is the starting point: one-click import of logins, cookies, sessions, and extensions, shared safely with your own browsing through separate Spaces.

Non. Il n'y a aucune boucle de modèle séparée à financer. L'intelligence provient de l'agent de code que vous utilisez déjà, qu'il s'agisse de Claude Code, Codex, Cursor, Gemini CLI ou OpenCode. ego lite lui-même est gratuit, sans abonnement.

Les deux sont des outils open source pour la navigation pilotée par LLM, mais Browser Use est un framework d'agent Python construit autour d'une boucle autonome, tandis que Stagehand est le SDK TypeScript-first de Browserbase, avec des primitives act/extract/observe pour une automatisation hybride code plus IA. Les deux privilégient le code : vous créez un projet et fournissez l'accès au modèle. Consultez notre page ego lite vs Stagehand pour ce volet de la comparaison.

Ils répondent à des couches différentes. Browser Use est le framework d'agent ; Browserbase est l'infrastructure de navigateurs cloud sur laquelle s'exécutent ces frameworks. Les équipes combinent souvent une bibliothèque d'agent avec des navigateurs hébergés pour une échelle de production, et c'est un vrai atout pour les flottes cloud. ego lite ne se situe à aucune de ces deux couches : c'est un navigateur local et visible pour le travail d'agent que vous effectuez sur votre propre machine, avec vos propres comptes.

Browser Harness's agent loop calls the model at every step, and each call carries a fresh serialized snapshot of the page just to plan the next batch of clicks. Users running recurring or long-horizon tasks have asked the maintainers how to cut that cost, since the same task run the same way still pays full model price every time. On those 31 jobs that loop averaged 51.2 model round trips per task, the most of the five tools measured, against ego lite's 30.3. ego lite reduces the round trips themselves: the agent batches several actions in one JavaScript execution and reads pages as compressed Snapshots, so the savings compound over a whole task.

Le shell ego-browser qui connecte les agents au navigateur est open source sous licence MIT. Le navigateur ego lite lui-même est une application gratuite pour macOS, sans abonnement, et vos données restent locales.