Hark unveils Handoff, a browser-based AI agent for everyday tasks

Hark, the AI startup that secured $700 million in Series A funding in May, has announced its new browser-based agent called Hark Handoff. The company says Handoff is built to complete tasks efficiently in a browser and can navigate websites that do not provide official APIs, such as Target, Walmart, OpenTable and LinkedIn. According to Hark, the agent examines both the structure of a page and visual cues to decide whether to click buttons or enter text.

The concept is similar to other browser-control agents: a user gives a command and the system performs actions. Hark says Handoff can order food or coffee, book travel tickets, file returns, shop for essentials, reserve a restaurant table, or research topics by pulling information from different sources. In a demo video, CEO Brett Adcock instructs the agent to build a bouquet with flowers specified by the user, including an ambiguous request for “some of the florist’s choice.” The video, however, shows only a portion of the process, so the effectiveness is hard to judge from the footage.

For this launch, Hark says it has used a post-trained model, and it plans to move to pre-training later in the year. The company argues that this approach lets it improve its data pipeline, training infrastructure and methods more quickly. Hark also claims its model is different from traditional large language models because rather than predicting the next token, it predicts the next action, such as a click or a keyboard input at a specific location.

Hark is entering a crowded field. Companies like Google, OpenAI and Anthropic are developing computer-use agents, and several venture-backed startups, including Browser Use, Polar, Strawberry and Aside, are focused on browser-based automation. Still, Hark says Handoff is faster than competing products and significantly cheaper than models such as GPT 5.5 and Opus 4.8. The company has opened a waitlist and intends to make Handoff available by the end of the summer.