For the PM who needs the prototype to inherit the design system, not generate one
v0 opens the PR. The code is idiomatic React with shadcn and Tailwind on Next.js—exactly what v0 ships. The trouble is not the React. It is that “idiomatic React” is not the same as “your React.” Your team’s buttons, your team’s design tokens, your team’s component patterns do not live in v0’s output. Engineering opens the PR, agrees the code is fine, and starts the reconciliation pass anyway. Else writes against the components and conventions already in your codebase, so the PR uses your patterns from the first prompt—not v0’s defaults.
TL;DR
v0 generates React and Next.js components and, as of February 2026, opens pull requests into a connected GitHub repo. v0 is at its sharpest for engineers and dev-fluent product managers in a React, Next.js, and GitHub stack.
Else runs on a customer’s real frontend codebase across React, Vue, and Angular, on GitHub, GitLab, or Bitbucket. Else inherits the existing design system, runs against the customer’s staging backend, and deploys prototypes inside the actual product for real user tests. Else is built for product managers and designers, with multi-framework support under a single customer.
Both Else and v0 turn an AI prompt into a working prototype and end on a pull request. The difference is who is at the keyboard, what the prototype is built on, and how far the work can ship without a rebuild. Else is built for product managers and designers who need the prototype to look like an embedded part of their app and to land as a pull request engineering can review, test, and merge.
The honest split
v0 is at its sharpest as a React + Next.js + GitHub assistant. Else covers that same ground — and tends to be strongest there too — then keeps going: Vue, Angular, GitLab, Bitbucket, more than one framework under a single customer, and the design system already living in the customer’s codebase.
The question is not which stack the team is on. It is whether one focused React tool is enough, or whether the prototype has to span everything the product is made of.
Side by side
| v0 | Else | |
|---|---|---|
| Who’s at the keyboard | Engineers, dev-fluent product managers | Product managers, designers |
| Frontend frameworks | React + Next.js | React, Vue, Angular — any client-rendered SPA |
| Repo platforms | GitHub | GitHub, GitLab, Bitbucket |
| Design system handling | Generates with shadcn + Tailwind defaults | Inherits the design system already in the customer’s codebase |
| Backend | Connects to existing Snowflake or AWS data; no auth, no business logic generated | Runs against the customer’s staging backend; supports full stack |
| Live user testing | Vercel preview URLs | Targeted in-product deployments to real users in the actual product |
| Output | Pull request to a connected GitHub repo | Pull request to a connected GitHub, GitLab, or Bitbucket repo |
| Multi-framework per customer | One framework per project | Multiple frameworks under a single customer |
Where v0 wins
v0 is a sharp tool inside its native shape. For an engineer or a product manager with comfortable Git fluency working in a React + Next.js codebase already on Vercel, v0 turns a prompt into a working component fast. The shadcn + Tailwind defaults produce idiomatic modern React, and the GitHub branch-and-PR flow released in February 2026 means the output lands in the same repo the engineering team already uses, with a feature branch and a clean PR rather than an exported zip.
If the work is a new component, a marketing page, or a UI proof inside an existing React app on GitHub, v0 is the shortest path to a working artifact.
Inherits the design system already in your product
Else builds the prototype out of what the product already uses. Components, CSS tokens, typography, spacing, the buttons engineering already styled, the modal pattern that already ships — Else writes against those rather than generating its own.
The result is a prototype that looks like an embedded part of the product the customer ships, because it is built from the same code. There is no shadcn-to-our-design-system reconciliation step. There is no engineering review pass to make the prototype match the product visually before it can be tested in front of users.
v0 produces idiomatic React with shadcn and Tailwind defaults. For teams that have not standardised on shadcn, every prototype carries a separate design-system reconciliation tax before it can ship inside the product.
Built for product managers and designers
Else is built around the assumption that the person at the keyboard is a product manager or a designer, not an engineer. The interface, the prompt design, the repo permissions model, and the deployment workflow all sit in front of a person who knows what should change about the product but is not writing the production code.
v0 is now closer to a developer environment than it was a year ago. The February 2026 release added a VS Code-style editor, Git branch fluency, and direct repo connection. That is a sharp set of features for an engineer or a dev-fluent PM. It is more surface area to navigate for a designer or a PM whose role does not include managing branches and pull requests.
The two tools are made for different people doing related but distinct work.
Runs on the codebase, regardless of stack
Else supports any client-rendered SPA: React, Vue, and Angular. A product manager at a Vue shop and a product manager at a Next.js shop use the same Else, on the same workflow, against the same kind of pull request output.
v0 generates in React and Next.js. A team running on Vue or Angular cannot use v0 against their existing codebase — the framework simply is not supported. That is an entire category of B2B SaaS engineering teams (Vue and Angular shops are common in enterprise SaaS) for whom v0 is not an option for prototyping on the real product.
Ships across GitHub, GitLab, and Bitbucket
Else opens pull requests on GitHub, GitLab, and Bitbucket. A customer running engineering on GitLab or Bitbucket does not need to migrate, mirror, or stand up a parallel GitHub presence to use Else.
v0 is GitHub-only. For teams whose primary repo platform is GitLab (common in self-hosted enterprise environments) or Bitbucket (common in Atlassian-aligned organisations), v0 has no path into the repo. The prototype-to-PR workflow only works if the prototype tool ships to the platform engineering already lives on.
Runs prototypes inside the actual product
Else deploys prototypes inside the customer’s actual product, served to specific users, teams, or companies through a targeted deployment. A real user logs into the real product, signs into a real account, and sees the prototype as part of the experience. Everyone else continues to see the production version.
That makes user testing a test of the actual change in the actual environment, not a test of a sandboxed demo.
v0 produces preview URLs hosted on Vercel. A preview is good for stakeholder review and design exploration. It is not the actual product, and it is not in front of real users on real accounts in the real environment.
Multiple frameworks under a single customer
Most B2B SaaS companies do not run on one frontend framework. A typical pattern: a marketing site in React or Next.js, an admin app in Vue, a customer-facing app in Angular, a partner portal in something else again. Else covers all of those under a single customer account.
v0 is a per-project React tool. Each project lives in one framework, one repo, one stack. A customer with a multi-framework reality manages v0 against one slice of it.
When to pick v0
A React shop on Next.js and Vercel, with engineering or a dev-fluent product manager at the keyboard, building a new component or landing page from a blank prompt — that is v0’s room. The output is a PR in the GitHub repo, the framework is the framework engineering already writes in, and the design system question is one engineering already owns separately.
When to pick Else
A product manager or designer who needs the prototype to look like the product, span more than React, and reach real users in the live app — that is Else’s room. Else covers React + GitHub teams as well, and that combination tends to be where Else is strongest. The reason to pick Else is the work that has to span beyond a single React project: a Vue admin tool, a GitLab repo, a design system that lives in the codebase, a live user test inside the product the customer already ships.