Artificial intelligence agent startup Wonderful AI Inc. today announced that it has closed a $150 million investment led by Insight Partners.

The Series B deal also included contributions from Index Ventures, IVP, Bessemer Venture Partners and Vine Ventures. It marks the third funding round that Wonderful has raised since launching last year. The Israel-based company is now valued at $2 billion.

Wonderful sells a software platform that enables workers to build AI agents with natural language instructions. There’s also a low-code editor that allows developers to add in more advanced features.

Software teams can integrate a Wonderful agent with external services and define guardrails that limit what tasks it may perform. They can also extend the agent’s feature set with extensions dubbed skills. For example, a developer could equip a customer support agent with a search engine that enables it to retrieve troubleshooting advice from from the public web.

Wonderful enables customers to test their AI agents before deploying them using a simulation tool. The feature emulates common situations that an agent will encounter in production and measures how it performs. The tool places particular emphasis on testing edge cases, or rare user requests that are particularly likely to cause technical issues.

The company carries out some of the testing using so-called harnesses. Those are software quality evaluations optimized specifically for AI workloads. They ease tasks such as organizing prompt responses into a consistent, condensed form that can be reviewed for errors.

After an agent is deployed to production, Wonderful generates a dashboard that tracks response latency and other technical parameters. It also tracks business metrics such as the percentage of customer support requests that an agent answers correctly. According to Wonderful, customers can use the dashboard to detect fluctuations in an AI application’s performance.

The platform generates reasoning traces to speed up troubleshooting. A reasoning trace is a log that describes why an AI agent made a certain decision.

Wonderful says its platform lends itself to a wide range of tasks. Customers can create agents that answer customer inquiries, fix network issues and process medical data. Wonderful claims that its platform reduces the amount of time required to complete some business tasks by 60%.

“In 2026, enterprises will be deciding who to partner with to operationalize AI across their organizations, and those decisions will hinge on who can deliver deep integrations across complex infrastructures and tailor solutions to each organization’s unique environment,” said Wonderful co-founder and Chief Executive Bar Winkler (pictured, left, with co-founder and Chief Technology Officer Roey Lalazar). “We built our platform and operating model around that reality.”

The company sends engineers to client organizations’ offices to help them deploy its platform. According to Wonderful, that approach can cut implementation times from months to a few weeks or days. The company will hire 550 new employees by year’s end to grow its colocated engineering teams.

Photo: Index Ventures