← All workCase study No. 07AI Platform + Tools07 / 17

Promptly AI.

One home for a world of AI tools

One home for 300+ AI tools across text, image, video, music and voice, with a single account and credit balance.

Client: Promptly AI
Industry: AI / SaaS
Engagement: Ongoing — Build + Operate
Relationship: A Promptly AI product, built by the studio

Promptly AI

IThe ground

The brief.

Promptly AI set out to bring hundreds of AI capabilities — resume builders, image and logo generators, video and music creation, voice, OCR, mock interviews and coding help — into one accessible platform for Indian users, with one account, one credit balance and one consistent way to move between tools.

IIThe plan

Our response.

We built Promptly AI as a Next.js 16 platform with more than 300 AI tools across text, image, video, music and voice. Clerk handles sign-in, Convex, Drizzle and Neon PostgreSQL hold user data, Razorpay payments top up a shared credit balance, and Inngest runs long jobs such as video generation in the background. Models from OpenAI, Anthropic, Google, Mistral, fal.ai and Replicate sit behind the Vercel AI SDK and LangChain, and the same APIs accept token-based access, so the Promptly mobile app works with the same account and credits.

Full-Stack Web Development
AI Integration
Payments & Credits
Mobile APIs
DevOps

IIIThe buildStrategy → craft → engineering → care

Brick by brick.

Course 01
One Platform, Hundreds of Tools
Organised the tools into categories with search and featured picks, each with its own page and API — 144 pages and 237 API routes in all.
Course 02
Many Models, One Interface
Connected OpenAI, Anthropic, Google, Mistral, fal.ai and Replicate through the Vercel AI SDK and LangChain, with Inngest background jobs for long-running generation.
Course 03
Credits and Payments
A shared credit balance across every tool, Razorpay orders with payment verification, coupons and a referral programme.
Course 04
Web and Mobile
Clerk sessions on the web and bearer-token access for the mobile app on the same APIs, so one account works everywhere.

—A closer lookPromptly AI in detail

Promptly AI section comparing one platform with many separate AI subscriptions — One platform in place of many separate subscriptions.

Promptly AI pay-as-you-go credits and plans — Pay only for what you use, with one credit balance.

Promptly AI featured video and image generation tools — Featured tools for video and image generation.

The connected creative world of Promptly AI.

IVThe outcomeWhat took shape

What it became.

AI Tools: 300+; Across text, image, video, music and voice
App Pages: 144; From individual tools to billing, referrals and admin
API Routes: 237; Serving the web app and the mobile app
Model Providers: 6; OpenAI, Anthropic, Google, Mistral, fal.ai and Replicate

Project scope and implementation details from Edifio’s case study.

VSpecificationBuilt on the right foundations