Umso
Create and publish a clean startup landing page with a form and simple analytics
The core loop is small enough for a capable coding agent to produce a useful local version in one sitting. For Umso, create and publish a clean startup landing page with a form and simple analytics. The hard boundary is template system, hosting, domains, and very low maintenance, plus editor polish, hosting, templates, and ecosystem.
Build verification: not recorded. How we judge buildability
What you give up
- template system, hosting, domains, and very low maintenance
- large template marketplace
- managed hosting and CDN
- advanced CMS
- commerce and agency workflows
Why people still pay
People still pay for Umso because the page renderer is reproducible, but customers pay to avoid becoming their own hosting and browser-compatibility team. The recurring cost buys responsive rendering, forms, domains, certificates, deploys, backups, template maintenance, and browser regressions, not just the visible interface.
Your build guide
The stack, security requirements, and agent rules for a focused replacement.
Before you start
- Runtime and tools: TypeScript, React, a Node build process and versioned JSON content with static HTML/CSS output.
- Before starting: Licensed assets, a user-owned static hosting target and sample desktop/mobile content; forms need a separately authenticated server endpoint.
Use these project rules and optional skill references alongside the prompt. Review each skill before adding it to your agent; the AGENTS.md export includes the same guidance.
Project rule — domain: Store ProductFact, Section, CTA, PublishedRevision and Lead; generated copy references supplied facts and public builds cannot contain private lead records.
Project rule — scope and recovery: Start with a few coherent templates and accessible forms. Analytics and email are optional disclosed integrations, not automatic evidence of growth or conversion.
Project rule — acceptance: Supply a brief without customer proof, generate a page and submit twice after a timeout; no testimonials are invented and only one lead is accepted.
Project rule — delivery: document real setup commands and permissions; do not claim a build, accuracy level, performance result or security certification that has not been demonstrated.
Recommended skill: frontend-design — compose the proposed responsive site sections with deliberate typography, spacing and honest content. Follow the maintainer's installation instructions and match its requirements to the chosen runtime.
Recommended skill: seo-audit — review crawlability, metadata and evidence-based on-page findings without promising search rankings. Follow the maintainer's installation instructions and match its requirements to the chosen runtime.
Implementation plan
Phase 1
Pin the working slice and create its example input: Create a small startup landing page from a product brief, edit sections, publish a static version and collect leads through a separate endpoint. Confirm setup: Licensed assets, a user-owned static hosting target and sample desktop/mobile content; forms need a separately authenticated server endpoint.
Phase 2
Implement persistence and write-time invariants before decorating the UI: Store ProductFact, Section, CTA, PublishedRevision and Lead; generated copy references supplied facts and public builds cannot contain private lead records.
Phase 3
Connect the working view to real saved state. Keep drafts separate from the published manifest. Escape content, allowlist components and URLs, and publish a complete revision atomically with rollback to the preceding revision.
Phase 4
Expose the app-specific limits and recovery path in context: Start with a few coherent templates and accessible forms. Analytics and email are optional disclosed integrations, not automatic evidence of growth or conversion.
Phase 5
Walk through this concrete acceptance case and preserve its exported evidence: Supply a brief without customer proof, generate a page and submit twice after a timeout; no testimonials are invented and only one lead is accepted. Finish the README and backup/restore instructions; report unfinished capabilities explicitly.
Build the following focused alternative to Umso. Implement the focused workflow below first; the verdict is not evidence of a completed or production-certified build. WORKING SLICE Create a small startup landing page from a product brief, edit sections, publish a static version and collect leads through a separate endpoint. SETUP AND ARCHITECTURE Use TypeScript, React, a Node build process and versioned JSON content with static HTML/CSS output. Prerequisites: Licensed assets, a user-owned static hosting target and sample desktop/mobile content; forms need a separately authenticated server endpoint. Before integrating anything, record actual versions and permissions, plus model files or provider limits only where used, in the README; make unavailable dependencies visible rather than simulating success. DOMAIN MODEL AND INVARIANTS Store ProductFact, Section, CTA, PublishedRevision and Lead; generated copy references supplied facts and public builds cannot contain private lead records. IMPLEMENTATION CONTRACT Keep drafts separate from the published manifest. Escape content, allowlist components and URLs, and publish a complete revision atomically with rollback to the preceding revision. Provide an input/setup view, the main work view, and a review/export view appropriate to this workflow. Preserve the last saved state if a job or save fails. Include empty, loading, permission-denied, partial and retryable-error states. Log identifiers and error categories without secret values or unnecessary private content. APP-SPECIFIC BOUNDARY AND RECOVERY Start with a few coherent templates and accessible forms. Analytics and email are optional disclosed integrations, not automatic evidence of growth or conversion. ACCEPTANCE SCENARIO Supply a brief without customer proof, generate a page and submit twice after a timeout; no testimonials are invented and only one lead is accepted. Also reopen the app after an interrupted operation, confirm the saved record/export remains inspectable, and document the recovery action. These are implementation acceptance requirements, not a claim that this guide has been tested. DELIVERY Deliver a runnable repository with migrations or project-format versioning, a non-sensitive example, environment/permission setup, the exact manual acceptance steps, and a backup/export-and-restore walkthrough. Implement the working slice before optional integrations; list any deferred paid-product capabilities honestly. Do not add capabilities outside the working slice just to resemble the original product. PROJECT RULES FOR AGENTS.md Keep the domain invariants above executable at the write boundary. Propose scope changes before adding providers or permissions. Never fabricate source evidence, publish results, identity matches or successful delivery. Preserve user originals and require an explicit confirmation for destructive changes or external publication.
$ open in your agent (prompt prefilled, you press enter), copy the prompt or copy or download AGENTS.md · generated from this app's build plan
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Alternatives to building your own
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Umso pricing
| plan | monthly | annual (per mo) | what you get |
|---|---|---|---|
| free | $0/workspace | $0/workspace | 1 site with homepage only, blog, free Umso subdomain, Umso branding and basic analyticsPricing is per site; users are unlimited. |
| basic | $14/workspace | $7/workspace | 1 site with up to 10 pages, custom domain, custom code, cookie banner, basic forms and no Umso brandingAnnual price is the effective monthly rate shown by the live yearly toggle. |
| pro | $25/workspace | $20/workspace | 1 site with unlimited pages, custom forms, advanced analytics, password protection, multilingual content and site exportAnnual price is the effective monthly rate shown by the live yearly toggle. |
free tier1 homepage-only site with a blog, Umso subdomain, Umso branding and basic analytics; unlimited collaborators
billingmonthly + annual; every site has its own subscription and billing cycle
hidden costsEach site is billed separately, and custom-domain registration or renewal is separate. Some integrations, such as Memberstack, require their own paid subscription.
pricing sources checked 2026-08-14 · pricing source ↗
Questions about Umso
Can you build your own Umso with AI?
The verdict is yes for the scoped workflow. The core loop is small enough for a capable coding agent to produce a useful local version in one sitting. For Umso, create and publish a clean startup landing page with a form and simple analytics. The hard boundary is template system, hosting, domains, and very low maintenance, plus editor polish, hosting, templates, and ecosystem.
What does the Umso build prompt cover?
The prompt starts with this scope: Create a small startup landing page from a product brief, edit sections, publish a static version and collect leads through a separate endpoint. Full-product capabilities excluded from the comparison include: template system, hosting, domains, and very low maintenance; large template marketplace; managed hosting and CDN. Follow the implementation plan and its prerequisites before expanding the build.
How do I use the prompt, AGENTS.md and agent skills?
Start with the Umso prerequisites and stack, then copy the prompt into your coding agent. Save the project rules as AGENTS.md in the project root. Linked skills are optional packages or source instructions for specific tasks; review their current contents and install only those matching the chosen stack. A skill does not supply API credentials or verify the finished app.
How long will this Umso project take?
The catalogue estimate is multi-day for the limited scope. Setup, integration approvals, debugging, deployment and ongoing maintenance can add time. This is an estimate, not a delivery guarantee.
What would I give up by replacing Umso?
template system, hosting, domains, and very low maintenance; large template marketplace; managed hosting and CDN; advanced CMS; commerce and agency workflows. People still pay for Umso because the page renderer is reproducible, but customers pay to avoid becoming their own hosting and browser-compatibility team. The recurring cost buys responsive rendering, forms, domains, certificates, deploys, backups, template maintenance, and browser regressions, not just the visible interface.
What price is this guide comparing against?
The recorded Basic plan is $14/mo (monthly), checked 2026-08-14. Check the linked pricing source before buying. Building your own also has hosting, API and maintenance costs; the recorded amount is not a guaranteed saving.
What can I use instead of building Umso?
Mautic: Landing pages, forms and analytics without limits; clean startup simplicity is replaced by a marketing control room. systeme.io: A hosted startup page, custom domain, form and campaign analytics for zero dollars; the funnel UI gives away its ancestry. Check each option's license, hosting needs and feature limits.