Eric Simons

Eric Simons is the founder of StackBlitz and co-founder and CEO of Bolt.new, an AI app builder that creates apps and websites through a conversational interface. Bolt launched in October 2024. His work combines browser-based development infrastructure with AI agents, with a growing emphasis on helping product and engineering teams build with their companies’ existing code and design systems.[3][6][5]

In a February 2026 interview, Simons described a consequential change in Bolt’s strategy. After experimenting with consumer use cases during the first half of 2025, the company returned to its B2B developer-tooling playbook in Q3 2025. He said consumer churn made that segment less attractive, while product and development teams showed the retention the company wanted. The priority became sustained professional use rather than acquiring users at all costs.[5]

Simons’s position was that “the prototype is the product.” Rather than generate a disposable demonstration that engineers must rebuild, he wanted Bolt to use a company’s coded design system and produce work that could enter its production codebase. He described using Bolt himself for high-level scaffolding and prototyping, with engineers then using Claude Code to add functionality at a lower level.[5]

He framed Bolt’s value as “better interfaces and context to the end user and for the agent.” In his account, the team began by onboarding enterprise customers manually, then converted those lessons into tooling that traversed codebases and created documentation. It also began fine-tuning models to ingest that context and generate code more accurately and cheaply. The aim was to let a product manager work with existing components and project conventions without assembling the context through a command-line tool.[5]

Simons also applied his agent ambitions to Bolt’s own organization. In February 2026, he said the company had capped headcount and wanted more agents than humans, extending automation beyond engineering into marketing and sales. His broader vision was for employees to manage teams of agents; he described professional product development as the first durable use case to establish before expanding into other functions.[5]

In his July 30, 2026 article, Simons argued that security tools often interrupt the workflow of people building with AI: they produce reports that builders must read, triage, and turn into fixes. “Measurement isn't the bottleneck. Friction is.” His proposed response was to put remediation inside the platform, after an app had been built and before it went live.[6]

The security agent he introduced scans projects for issues such as broken access control, exposed secrets, and business-logic gaps. It applies mechanical fixes automatically and flags architectural changes for review. Simons explicitly described it as a first pass rather than a replacement for existing security tooling, placing it before enterprise checks in the CI/CD pipeline.[6]

Bolt’s browser-based execution environment predates its AI app builder. Simons said in 2026 that WebContainers was the technology StackBlitz had been founded to build and that it now powered Bolt. His earlier work supplies the technical context for running an app’s development environment inside a browser tab instead of provisioning a cloud VM for that execution.[5]

In the May 20, 2021 WebContainers announcement, Simons described the team’s decision to pursue a WebAssembly-based environment capable of running Node.js entirely inside the browser. The goal was to remove local setup from prototyping, bug reproductions, and collaboration. He credited the StackBlitz team and thanked partners Vercel and Google.[4]

WebContainers runs code within the browser’s security sandbox. A virtualized TCP network stack maps to the browser’s ServiceWorker API, allowing Node.js servers to run in the browser, while Chrome DevTools provides back-end debugging without additional installations or extensions. Simons later emphasized the economic consequence for Bolt: browser-local application execution avoids the cost of a cloud VM for each development session.[4][5]