Larkspur Invoices
Freelancers send invoices and get paid.
- From useDeploy
- Login
- Payments
- Emails
- You build: invoices and reminders
SaaS boilerplate · built for AI
Build your SaaSin a weekend.
Login, payments, teams, emails and AI are already done. You build the idea.
One-time payment · 14-day refund · Works with Claude Code, Cursor and Codex
- Login
- Payments
- Teams
- Emails
- AI
- Uploads
- Feature flags
- Admin
- + 3 more
What’s included · 11 modules · 800+ tests
Everything around your idea. Already built and tested.
Login & accounts
01 / 12Stop building login screens.
What your users get: a sign-in page with Google, magic links and two-factor codes.
- Sign up and log in with email
- Google sign-in and magic links
- Password reset and email verification
- Two-factor codes and passkeys
Teams & roles
02 / 12Sell to companies from day one.
What your users get: their own workspace, a member list with roles and email invites.
- A workspace for each customer
- Invite teammates by email
- Owner, admin and member roles
- API keys per workspace
Payments
03 / 12Get paid the day you launch.
What your users get: a plan to pick, a checkout to pay, and a receipt right away.
- Subscriptions with Polar; checkout with Polar or Mercado Pago
- One-time purchases
- A customer portal to manage plans
- Payment webhooks already handled
Emails
04 / 12Every email your app needs, already sending.
What your users get: welcome, verification and receipt emails in their inbox.
- Welcome and verification
- Password reset and magic links
- Invitations and receipts
- Sent through Resend or SES
AI
05 / 12Add AI features without the plumbing.
What your users get: a chat that answers as it types, using your own docs.
- Streaming chat
- Answers from your own docs
- Tool calls
- An MCP server for your API
File uploads
06 / 12Let people upload files from day one.
What your users get: drag-and-drop uploads with progress, and a profile photo.
- Avatars and file uploads
- Stored on S3, your own disk or UploadThing
- A new upload never shows an old cached file
Webhooks
07 / 12Let customers connect your app to theirs.
What your customers get: every event delivered to their own URL, with status and time.
- Send your events to your customers’ own URLs
- HTTPS only
- Blocked from reaching internal addresses
- Never sent twice
Feature flags
08 / 12Ship a feature to some people first.
What you get: a switch per workspace, per user or for a share of everyone.
- Turn it on for one workspace
- Or for one user
- Or for a percentage of everyone
- No deploy needed
Usage limits
09 / 12Charge for how much people use.
What your users get: a clear meter of what they’ve used against their plan.
- Count what each workspace uses
- Set a limit per plan
- Free up to the limit, paid after it
Audit log
10 / 12Know who changed what, and when.
What your users get: a timeline of every role, billing and member change.
- Role, billing and user changes recorded
- Who did it and when
- A separate log for every workspace
Admin panel
11 / 12Run your SaaS from one screen.
What you get: every user and workspace in one table, with plan, status and a way in.
- Suspend users and workspaces
- Change anyone’s plan
- Turn feature flags on and off
- Log in as a user to debug — every action logged
And the rest
12 / 12The boring parts, also done.
What you get: languages, privacy, jobs, deploys and tests, all set up.
- Background jobs
- English, Spanish and Portuguese
- GDPR account deletion and data export
- Deploy to Docker, Railway or Dokploy
- 800+ automated tests
What you can build
Four products, one base. Each one only builds its idea.
Stillwater
A pilates studio where members book classes.
- From useDeploy
- Login
- Payments
- Emails
- You build: the class schedule
Hushline
An AI support chat that answers from your help docs.
- From useDeploy
- AI
- Usage limits
- Teams
- You build: when to hand off
Proofroom
A client portal where a design studio gets work approved.
- From useDeploy
- Teams
- File uploads
- Emails
- You build: feedback rounds
Built for Claude Code, Cursor and Codex
Your AI builds on top. The base stays solid.
Your AI follows the rules
The repo tells your agent where every piece goes.
It can’t break the base
Automatic checks stop changes that break the structure.
Docs your AI can read
44 pages of docs, plus a version written for AI tools.
Started in Lovable, Bolt or v0?Keep the idea. Move it onto a base that holds in production.
The demo was the easy part. Login, payments, teams and deploys are where AI-built apps break — that part is already done here.
See how to move an AI-built appPricing
One payment. Yours to keep.
Building this yourself: about 6 weeks. Here: one payment.
Founder
The version you buy, yours forever.
$99one-time
Get Founder — $9911 modules
- Login & accounts
- Teams & roles
- Payments
- Emails
- AI
- File uploads
- Webhooks
- Feature flags
- Usage limits
- Audit log
- Admin panel
Also included
- English, Spanish and Portuguese
- GDPR account deletion
- Background jobs
- Deploy anywhere Docker runs
- 800+ automated tests
- 44 pages of docs
- Future releases
- Priority Discord support
Most popularLaunch price — goes up to $249 next
Lifetime
Today’s version and every release after it.
$199one-time
Get Lifetime — $19911 modules
- Login & accounts
- Teams & roles
- Payments
- Emails
- AI
- File uploads
- Webhooks
- Feature flags
- Usage limits
- Audit log
- Admin panel
Also included
- English, Spanish and Portuguese
- GDPR account deletion
- Background jobs
- Deploy anywhere Docker runs
- 800+ automated tests
- 44 pages of docs
- Every future release
- Priority Discord support
Try it first. Sign up free and explore the full dashboard. Create a free account
One-time payment · No subscription · 14-day refund · Commercial use, unlimited projects
FAQ · before you buy
Questions.
What people ask before they buy.
- Refund
- Within 14 days of buying
- License
- One-time · Founder $99 · Lifetime $199
01Is this a template or a framework?
Neither. It is a complete codebase: you get the whole thing and own every line.
02Do I need to know how to code?
Not much. Claude Code, Cursor or Codex write the code; the repo tells them where everything goes.
03Which AI tools does it work with?
Claude Code, Cursor, Codex — any AI agent that can read a project.
04Can I use it for client or commercial projects?
Yes. Both licenses allow commercial use and unlimited projects.
05What do updates look like?
Lifetime gets every future release. Founder is the version you buy, frozen.
06Where can I deploy it?
Anywhere Docker runs. Railway, Docker and Dokploy are documented step by step.
07Can I try it before buying?
Yes. Create a free account (no payment) and explore the dashboard: organizations, roles, billing, security, audit log, AI. You buy the license from inside.
08What if it is not for me?
Ask for a refund within 14 days of buying.
Stack · every one of these is in the repo
Built on tools you already know.
Bun
TypeScript
Next.js
React
Express
Prisma
PostgreSQL
Turborepo
Redis- BullMQ
Docker
Railway
Sentry
OpenTelemetry
Zod
Tailwind CSS
- Polar
Anthropic
Vercel AI SDK
BetterAuth
Resend- Playwright
Friday: idea.Sunday: first customer.
Login, payments, teams and emails are already done. Spend the weekend on your idea.
One-time payment · Founder $99 · Lifetime $199 · 14-day refund