Optimizely Optimizely is a Digital Experience Platform that helps marketing teams create, test, and personalize digital customer touchpoints. It equips organizations with advanced tools, including web-based A/B testing, multivariat Visit ↗
BYOB New inbox in every project
Show Results, Not Just Promises Case studies thatclose.
Launch an agency site with portfolio showcases, case studies, and lead capture that wins retainers.
Runs on the stack you trust
Prompt to product
From one-line brief to finished app.
Compare the one-line brief with what BYOB ships. Real layout, data, and deploy status, editable from the same workspace.
TD
Team Tasks
Shared task tracking
Today4
Done11
Streak6d
Open live app ↗
Drag the handle. Or focus it and use the arrow keys.
Get inspired
Sites like this, live today.
Real sites that do it well. Build something like this with BYOB.
Podia Thousands of people trust Podia to create and sell digital courses and products on the web. Podia is free to start with and offers all the tools a creator needs to succeed online. Visit ↗
Buffer Buffer helps businesses build an audience on multiple social media platforms. The product provides affordable and intuitive marketing tools for creators, startups, and enterprises. Visit ↗
Pentagram Case-study-led positioning with strong brand. Visit ↗
Huge Case-study-led positioning and strong brand. Visit ↗
Startup Landing-page builder with strong templates. Visit ↗
Fresh from the community
See what builders ship, or start from an example.
Live workspace
Code, chat, and preview in one place.
The workspace is built for repeated product work, not disposable demos. Every generated file stays inspectable, every change is visible, and every follow-up can target the exact part of the app you care about.
01 · EDITOR
Generated code, ready to edit.
Every file BYOB writes stays visible and editable. Follow-ups target the exact lines you care about instead of regenerating from scratch.
- Added lines highlighted the moment they land
Code
Act mode TodoPage.svelte
schema.ts
1
<script lang='ts'>2
type Task = { id: string; title: string; done: boolean
}3
let tasks = $state<Task[]>([])4
5
function toggleTask(id: string) {6
task.done = !task.done // just added by BYOB7
}8
</script> main · 0 problems Preview ready
02 · AI COMMAND
Plan, build, and refine in one chat.
Describe the outcome once. BYOB turns it into a build plan, implements it step by step, and keeps every change visible while you iterate.
- Build plan with live progress you can inspect
B BYOB AI
Chat Act
Your prompt
“Build a todo app for beginners”
Build plan
80%- Task list UI + empty state
- Add + toggle actions
- Progress summary…
Add due dates and filter by done…
03 · LIVE PREVIEW
See every change the second it lands.
The preview updates as BYOB works, with deploy status attached, so the path from edit to production stays inspectable.
- Real app state, not a static mockup
Live preview
/TD
Team Tasks
Shared task tracking
Progress 2 of 3 done
- Wireframe landing page
- Task list component
- Responsive polish + QA
Ask BYOB to refine
Deployed · SvelteKit · SSL on
Prompt to app
From first prompt to a workspace you can ship.
Start conversationally, approve the shape, let Tool Mode implement, then refine and deploy from the same workspace.
- 01 Describe the product Start with the outcome, audience, and any constraints. BYOB turns the idea into a practical build plan.
- 02 Shape the UX Review the proposed flows, screens, data needs, and visual direction before code starts moving.
- 03 Generate the app Tool Mode writes SvelteKit code, connects integrations, and keeps each change visible in preview.
- 04 Test and refine Ask for edits, roll back when needed, run checks, and keep the project editable instead of disposable.
- 05 Deploy Ship the finished app, connect domains, and keep iterating from the same workspace.
Agent and backend
Code with your agent, ship with a real backend.
Connect Codex, Claude Code, or Antigravity to your project, then store data and ship to production without leaving the workspace.
- Approve project access from BYOB
- Installs the byob command
- Preview, deploy, git diff, DNS, credits, and code tools
npmnpx -y byob-cli codex installApprove only the projects your agent can touch, then read context, edit files, inspect diffs, test previews, and roll back from your terminal.
- 1
- prompt to start
- 3
- live panes
- 24/7
- edge preview
Loved by builders
Rated 4.9/5 by developers and founders using BYOB to move from idea to shipped product.
Built for shipping
The parts that usually slow you down are already here.
BYOB handles product planning, implementation, preview, testing, database work, and deployment from one focused interface, with coding-agent access and production analytics when you want to keep working from your own terminal.
This part is hands-on. The cards drift until you touch them. Drag to rearrange, or press and hold one to feel it push back.
Agent integrations
Give Codex, Claude Code, or Antigravity scoped access through BYOB CLI or Agent MCP. Your agent reads context, edits code, tests previews, and deploys from your terminal.
Git history and diffs
Every change lands as a commit. Inspect history, compare diffs, and see exactly what changed since the last deploy.
Inbox in every project
Every project ships with an inbox. Collect messages, leads, and feedback from your app without wiring a third party.
Email sending built in
Send magic links, OTP codes, and transactional mail from your own sender address. Resend-backed, no SMTP setup.
Google and magic-link login
Offer Continue with Google plus passwordless email codes. Sessions and callbacks are handled.
Custom domains and SSL
Point your domain at BYOB with guided DNS checks. Certificates are automatic.
Visual editing
Click any element in the live preview and describe the change. Copy, spacing, color, behavior.
AI testing agent
Run full-site or feature checks and get implementation-level feedback you can apply in one step.
Version rollback
Step between saved states or redeploy a known commit when an experiment goes sideways.
One-click deploy
Builds publish to production hosting in one step. Deploys can auto-save the project state first.
Deployment analytics
Worker traffic, errors, CPU timing, subrequests, and custom-domain status from the workspace.
Supabase aware
Connect Supabase and BYOB reads schemas, drafts migrations, and generates types that match your app.
Team collaboration
Invite people in and keep sessions coordinated so work never overwrites work.
- Vision inputs
- Voice coding
- Project templates
- SEO-ready output
- Context tracking
- Model lock
Simple pricing
Start with credits, upgrade when usage is steady.
Pay as you go when you are exploring. Move to Pro or Max when BYOB becomes part of your regular build workflow.
Pay as you go
$0
$1 = 100 credits
Pro
$25
2,000+ credits/mo
Max
$79
8,000+ credits/mo
Live estimator
What will your app cost?
Try the cost calculator. Drag the pages slider, toggle the options, and watch the agency quote vs BYOB update instantly.
Open full cost calculator →Number of pages: 5
Traditional agency estimate
$5,750 upfront
Yearly maintenance
~$1,150 / year
BYOB estimate
~$45 in credits
BYOB builds the same site from one prompt and hosts it on the edge. Planning estimates, not quotes.
See BYOB plansView full pricing
Need white-label and SSO? Talk to us →
The best website builder for a marketing agency produces a credible site with services, campaign case studies, team and lead capture, while letting the same platform generate client builds. BYOB outputs editable code, so agencies can launch faster, retain control of the source, and improve margins.
A site that wins retainers
Agency buyers are sceptical and comparison-shopping. Your site must state what you do, for whom, with evidence that you have done it before, and a low-friction way to start a conversation. BYOB generates a structure around a positioning statement, a services overview, a results section and a primary call to action, with dedicated pages for depth. Instead of an over-designed template that buries the offer, the draft keeps the commercial argument front and centre and easy to scan.
Services and campaign case studies
Generalist claims persuade nobody, so the site should let a prospect see themselves in your work. BYOB drafts service pages for paid media, SEO, content, lifecycle or creative, and case-study layouts that cover the brief, the channel mix, the creative and the measured result. Where a client is under contract, describe the sector and outcome without naming them. New case studies reuse the same components, so publishing one after a campaign wraps takes an afternoon.
Team and culture that reduce risk
Clients hire people, not logos. A team section with real names, roles, specialisms and short bios makes an agency feel accountable and helps prospects picture working with you. BYOB can also generate a culture or careers page with values, benefits and open roles. Keep the copy specific rather than full of abstract adjectives, and include photos or avatars. This matters for both new business and recruiting, since candidates research culture before they apply.
Campaign landing pages at speed
Campaign timelines rarely allow a two-week landing page build. With BYOB, describe the offer and audience and generate a focused page with a headline, proof, form and thank-you state in the same session. Duplicate it to produce variants for A/B tests without rebuilding from scratch. Because every page is real code, you can wire the form to your CRM or project inbox and track conversions properly instead of relying on a locked builder that limits pixels and scripts.
Lead generation and enquiry routing
An agency site is only as good as the pipeline it creates. BYOB generates contact and RFP forms with fields for company, budget, timeline and goals, delivered to your project inbox. You can create separate intake paths for different service lines, add a qualification questionnaire, and build gated resource pages that exchange useful assets for contact details. Stored submissions make it possible to follow up systematically rather than losing leads in a shared inbox.
Deliver client sites white-label
Beyond your own site, BYOB changes how you produce client work. Generate a client site from a brief, refine it in the visual editor, then publish under their domain or export the code for handover. Because you control the source, you can add bespoke components and own the maintenance retainer rather than paying platform reseller fees. The same workflow covers one-off campaign pages and full multi-page builds, so your team does not need a second toolchain for smaller accounts.
FAQ
Frequently Asked Questions
Can I use BYOB to build client websites?
Yes. Generate, refine and publish client sites or export the code to hand over. Many agencies use it white-label for faster delivery and better margins.
Does it support landing pages for campaigns?
Yes. Generate a focused page in one session, duplicate it for variants, and wire forms to your project inbox or CRM.
Can I connect analytics?
Since pages are real code, you can add tracking scripts and conversion pixels yourself. BYOB also offers Fruitalytics for first-party analytics.
Is the generated code good enough to maintain long term?
Yes. Output is standard, Vite and Tailwind CSS with version history, so your developers can extend it as a normal project.
Can different team members work on the same project?
Combine the visual editor, chat and direct code edits. Review changes through diffs and roll back from version history when needed.
Build the first version today.
Start with one clear prompt. BYOB will help turn it into a product you can inspect, edit, test, and ship.