AI startups report accelerating revenue growth, with some crossing billion-dollar thresholds in months

Mercor reported crossing $2 billion in gross annualized revenue in June, less than four months after reaching $1 billion. The company defines its metric as gross annualized revenue, which it says includes revenue under contract from paying customers but not yet billed.

Anthropic’s revenue run rate reached $47 billion in late May, up from $30 billion less than two months prior. The company previously reported a $9 billion run rate in late 2025, and $4 billion in July 2025. Anthropic’s figures are described as revenue run rate, a projection of annual income based on the most recent month’s revenue.

Sierra, which builds customer service AI agents, said it took seven quarters to reach its first $100 million in ARR and two additional quarters to add another $100 million. The company defines its metric as ARR.

Glean reported crossing $300 million in ARR in May. The company said it took nine months to grow ARR from $100 million to $200 million and six months to reach $300 million. Glean’s metric is described as ARR.

Gusto, an HR tech startup, said its revenue accelerated in each of the last five quarters and surpassed $1 billion in trailing 12-month revenue in May. Gusto’s metric is trailing 12-month revenue, not ARR.

Clio, a legal practice management software provider, said its ARR reached $500 million after embedding AI into its offering in 2023. The company previously reported $200 million in mid-2024 and $400 million by late 2024.