Alloy

Alloy is a product prototyping and user-testing platform that works with a codebase or captures pages through a browser extension. With a connected codebase, it can run an entire app and preview changes live in a browser. Teams can create and share interactive prototypes, run sessions and collaborate. The Free plan includes unlimited sessions and viewers, $5 credits per user per month, and 30+ integrations. Alloy lists integrations including Linear, Jira, Slack and Intercom for ideas, insights and customer requests. Sessions can be exported, accessed via MCP or converted into a GitHub pull request. Teams can push changes to a pull request and roll them out to customers. The browser extension requires no setup; connecting a codebase requires admin permissions and about 15 minutes. Pro costs $20 per user per month and includes Free features, workspace credit top-ups, code export and early access. Enterprise uses custom pricing and includes API access, an account manager, custom terms and SAML + SCIM. Support is standard on Free, priority on Pro and 24/7 on Enterprise. Alloy lists SOC 2 Type II status and security documentation.

Alloy combines prototyping and user-testing sessions with a path to export work into pull requests. The Free plan includes monthly credits, while Pro adds workspace credit top-ups and Enterprise adds custom security and support provisions.

Alloy may suit product teams that want to prototype and test ideas using captured pages or a connected codebase. Teams can also move session work into pull requests and customer rollouts.

Alloy is a cloud workspace that links interactive product prototypes and research sessions with a live preview of an existing application. It is aimed at product, design and engineering groups that need feedback to inform real code changes. The strongest case is a shared path from customer observation to an implementation-ready pull request; the main caution is that the codebase workflow requires administrator access and Pro charges per user.

Overview

Alloy supports interactive prototypes, user testing and team collaboration through a browser extension and cloud sessions. The extension can capture a page without setup. Connecting a codebase takes administrator permissions and about 15 minutes, after which Alloy can run the application in the cloud and display edits live in a browser. That makes it useful for evaluating changes against a working product rather than a static mockup.

Sessions can be exported, accessed through MCP or converted into a GitHub pull request. Teams can then push the resulting work toward customers. This is a meaningful bridge between product discovery and engineering, although organizations with tightly controlled repositories must budget for the connection step and its permissions.

Key features

Prototypes and research

Interactive prototyping and user testing share one workflow, so a team can present a proposed experience and collect sessions without moving participants between tools. Free allows unlimited sessions and viewers, which suits broad stakeholder or customer review without seat charges for everyone who watches. Credits, rather than session count, are the practical constraint.

Application previews and integrations

A connected codebase can run as an entire app, with changes previewed immediately in a browser. Alloy offers more than 20 integrations for ideas, insights and customer requests, including Linear, Jira, Slack and Intercom. Those connections are most valuable to teams already organizing product work in those systems; they are less compelling if feedback and delivery are managed elsewhere.

From session to pull request

Export, MCP access and GitHub pull-request conversion give engineers a concrete handoff instead of leaving research as a document. The ability to push changes toward a customer rollout makes Alloy a workflow tool, not only a prototyping surface. It does not remove the need for engineering review, but it can shorten the distance between an observed issue and a proposed fix.

Pricing

Free is a credible starting point for teams that can work within $5 of monthly credits per user and do not need the Pro export workflow. Pro quadruples the per-user credit allowance and adds top-ups and code export, making it the relevant tier for teams taking sessions into implementation. Because billing is per user, costs rise with the working team rather than with viewers; unlimited users on Free is therefore especially useful for wide participation. Enterprise is for organizations requiring identity provisioning, contractual flexibility, API access and around-the-clock support. No trial or refund policy is stated.

Platforms

Alloy is delivered as an extension with cloud-based sessions. Users can capture pages through the browser extension or connect a codebase, and prototype sharing works with both approaches. The extension needs no setup; codebase connections need administrator permissions.

Who it's for

Alloy fits product leaders and cross-functional teams that want research, design iteration and engineering handoff in one place. It is a strong match for companies with an existing codebase, GitHub workflow and enough administrative access to connect them. Solo makers or teams seeking a lightweight visual prototype tool may find the per-user Pro price and repository permissions disproportionate.

Pros and cons

• Pro: Unlimited Free sessions and viewers support wide review without participant licensing.
• Pro: Live previews of a connected application make proposed changes easier to assess in context.
• Pro: Export, MCP and GitHub pull-request paths give validated ideas a route into delivery.
• Pro: SOC 2 Type II status and Enterprise SAML + SCIM address formal security and identity requirements.
• Con: Pro costs $20 per user monthly, so a large working group can become expensive.
• Con: Free's $5 monthly credit allowance limits usage-heavy work even though sessions and viewers are unlimited.
• Con: Connecting a codebase requires administrator permissions and setup time, which can block individual experimentation.

Alternatives

For a broader directory of image-to-interface products, see AI Screenshot-to-Code Tools; for general prototype platforms, see Prototyping Software.

• v0 is the better pick when API, iOS and web access, Vercel deployment and seven free messages per day matter more than Alloy's research-to-pull-request workflow.
• Figma Make suits teams already centered on Figma and wanting daily or monthly AI-credit allocations across macOS and web.
• Fronty is an option for publishing to a free fronty.live address with branding.
• Anima is worth considering for Figma imports, website clones and plugin code generation.
• Builder.io fits teams needing a published app, user-based spaces and monthly Agent Credits.
• CoderUI offers web-based generation with paid credit tiers and framework coverage.
• Codia AI is another freemium option across API, extension and web.
• Kombai is suited to users wanting a desktop-and-extension product with a defined monthly credit allowance.

Verdict

Choose Alloy if your product team wants user sessions and interactive prototypes to feed directly into a connected application and GitHub delivery process. Its broad Free participation and unusually direct engineering handoff are the main reasons to use it. Look elsewhere if you need a low-cost solo tool, cannot grant repository administration, or prefer a design-first workflow without per-user credit billing.