AI app starters · Rank #2

Velobase Harness

All AI developers deserve to get paid. Turn your AI prototype into a paid SaaS with open-source infrastructure for usage billing, payments, attribution, affiliates, anti-abuse, and deployment.

Active2+ majors behindFree

Visit Velobase Harness ↗Source on GitHub ↗

Why this verdict

19 commits by 8 contributors in the last 90 days (14 in the last 30).
Latest release v0.2.0, 15 days ago.
Vercel AI SDK 5 declared; latest is 7 (2 majors behind).
Express 4 declared; latest is 5 (1 major behind).
Next.js 15 declared; latest is 16 (1 major behind).
Prisma 6 declared; latest is 7 (1 major behind).
Zod 3 declared; latest is 4 (1 major behind).
On current major: Auth.js, Expo, React, Tailwind CSS, tRPC.
Not counted in verdict: Stripe SDK 19 → 22, TypeScript 5 → 7, React Native 0 → 0.

Check before you commit

Two or more breaking releases behind on a core dependency.

Dependency freshness

Package	Declared	Latest	Status
Stripe SDK stripe	19.1.0	22.6.2	Behind, not counted
TypeScript typescript	5.8.2	7.0.2	Behind, not counted
Vercel AI SDK ai	5.0.68	7.0.116	2 majors behind
Express express	4.22.2	5.2.1	1 major behind
Next.js next	15.5.25	16.3.6	1 major behind
Prisma @prisma/client	6.5.0	7.10.0	1 major behind
React Native react-native	0.86.3	0.87.1	Behind, not counted
Zod zod	3.0.0	4.6.5	1 major behind
Auth.js next-auth	5.0.0-beta.32	4.24.15	Current
Expo expo	57.0.20	57.0.25	Current
React react	19.0.0	19.3.0	Current
Tailwind CSS tailwindcss	4.0.15	4.3.3	Current
tRPC @trpc/server	11.18.0	11.19.0	Current

Declared = lowest version the kit's package.json allows. Latest = npm "latest" tag. TypeScript and the Stripe SDK are shown but not counted in the verdict.

What's in the stack

Framework: Next.js, Expo, Express, React Native
Auth: Auth.js
Payments: Stripe
Database / ORM: Prisma
UI: Tailwind CSS, Radix UI
Email: Resend, Nodemailer, React Email, SendGrid
AI: Vercel AI SDK, OpenAI SDK
API layer: tRPC, TanStack Query, Hono
i18n: next-intl
Monitoring: PostHog

Detected from declared dependencies. A listed package means it's installed, not necessarily fully wired up.

What the README says you get

Analytics
Server-side attributionConnect purchases to acquisition channels with server-side attribution
Auth
Local authenticationOpen **Sign in** and choose **Explore as local administrator**
Billing
Usage-based billingAccept subscriptions and usage-based payments, manage credits, meter AI usage
Data
PostgreSQL databasePostgreSQL | postgres:16 | localhost:5432 | Prisma, auth, billing, product data
Data
Redis cacheRedis | redis:7 | localhost:6379 | BullMQ workers, queues, rate limits

Extracted from the kit's README by a local AI model (qwen3.5:4b) on Sep 26, 2026. Every item is checked against an exact README quote. A README claim is the maker's description, not something we tested.

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