From idea tolive productin weeks, not months.

Senior engineering paired with AI speed. Whether we're building from zero or rescuing a fragile Cursor/v0 prototype, we ship production-grade, revenue-ready software with 100% source code ownership.

See pricing & guarantees

7–21days

idea or prototype to live product

100%

source code ownership

10+

production systems shipped

50/50

milestone payment + launch guarantee

Scope frozen by day 3AI Prototype RescueNext.jsReactHono.jsPostgreSQLInternal SystemsWhite-Label SprintsStripe billingSenior-engineeredFixed scopeDeployed on Vercel100% Code Ownership

01/Who it's for

Built for builders
who refuse to wait months.Whether you're starting from a blank editor or stuck on the last 30% of an AI prototype, we bridge the gap to production.

Running an operations-heavy B2B business?

We build custom internal AI systems, automated outreach engines, and deterministic data pipelines that replace manual team grunt work.

Running a design, marketing, or AI agency?

Deliver custom software, SaaS products, and portals to your clients under your brand with fixed wholesale engineering.

Recognize yourself? Every sprint starts with a free 30-minute scope session and a locked fixed-quote guarantee.

02/Why us

Three ways to build.
One of them ships.Agencies are slow and expensive. AI builders hit a wall at auth, billing, and scale. The sprint model exists because of what's wrong with both.

Agency

3–6 months

DIY AI

Not Reliable

Existify

7–21 days

Timeline

3–6 months
Weeks stuck
7–21 days, fixed

Cost

$15k–$50k+
Token burn
$1,495 / $3,995 fixed

Code ownership

Often restricted
Platform lock-in
100% yours

Who builds it

Junior contractors
Unreviewed AI
Senior engineers

Post-launch

Hourly retainers
You're on your own
$495/mo care plan

AI builders generate fragile prototypes. We ship software that takes payments on day one.

03/The moat

Speed is the tool.
Judgment is the moat.Anyone can prompt AI. Knowing when to trust it, and when to rewrite it, is what turns a demo into a business.

60%

faster than traditional dev

AI does the typing

Proven internal workflows with Claude, GPT, and Cursor handle scaffolding and boilerplate. We keep the speed and cut the busywork.

100%

human-reviewed code

Seniors do the judging

AI leaves silent failures: broken tokens, N+1 queries, missing retries. Every file passes senior review before it ships.

0

lock-in, ever

You own everything

Complete TypeScript repository on GitHub with setup docs. Hand it to any developer, or run it yourself, forever.

04/The stack

Boring technology,
exciting velocity.The same stack the best SaaS companies run. Your future hires will thank you for it.

Frontend

Interfaces that feel native

  • Next.js / React 19
  • TypeScript
  • Tailwind CSS
  • shadcn/ui & Radix

Backend

Business logic, APIs, jobs

  • Server Actions
  • Hono.js / Nest.js
  • Node.js
  • Zod validation

Database

Multi-tenant, secure, fast

  • Supabase / Neon
  • PostgreSQL
  • Drizzle / Prisma
  • Row-Level Security

Revenue layer

Billing from day one

  • Better-Auth / Clerk
  • Stripe Billing
  • Resend
  • OpenAI / Claude API

Already on AWS, Firebase, or Python? We adapt to your architecture, not the other way around.

05/The process

Every sprint runs
the same way.No surprises, no scope creep. Each phase has one deliverable and you watch it land in real time.

Days 1–3 · Phase 1 of 6

Scope freeze

One call to define what we build, what we skip, and why. Scope is signed and frozen on day 3.

Product briefDB schemaFixed quote
Sprint progress17%

06/Proof

Shipped in weeks.
Live in production.Every sprint ends with real software in front of real users. Two recent builds, straight from production.

AI SaaS · Developer tools/bip-os.com

BIP OS

Turn today's commits into today's post.

1 week

Sprint duration

MVP

Sprint type

3 formats

Outputs per day

Zero

Code exposure

React · Astro · Hono · PostgreSQL · Redis · Turborepo

https://bip-os.com
The BIP OS landing page: commit-to-content engine — BIP OS

The BIP OS landing page: commit-to-content engine

B2B SaaS · AI outbound/coldbind.com

ColdBind

The all-in-one autonomous AI outbound sales engine.

3–4 weeks

Sprint duration

SaaS

Sprint type

8

Core modules

Built from scratch

Auth

React · Astro · Nest.js · PostgreSQL · Redis · Passport.js (custom auth)

https://coldbind.com
The ColdBind landing page: autonomous AI SDR platform — ColdBind

The ColdBind landing page: autonomous AI SDR platform

Want your product in this section?

07/Pricing & Guarantees

One price.
Zero surprises.Fixed-scope sprints and custom operational systems with ironclad delivery guarantees.

The Production MVP & AI-Rescue Sprint

AI Rescue & MVP
$2,495

$1,495

Only 2 slots left this month

From raw idea or stuck Cursor/v0 prototype to live, payment-taking product.

7–21 Days
Stuck Cursor/v0 buildersSemi-technical foundersSolo entrepreneurs
  • 1-hour Strategy & Scope Freeze (Day 1)
  • Full Auth, PostgreSQL DB & Core Features
  • AI Codebase Refactor & Security Audit (for rescue builds)
  • Stripe Billing & Webhook Integration
  • Production Deployment (Vercel/Supabase)
  • 100% GitHub Source Code Ownership

14-Day Launch Guarantee: Live in production on schedule or we work free until it is.

Live product ready for real users and payments in 7–14 days.

The SaaS Scale Sprint

Most popular · 60d warranty
$5,495

$3,995

Multi-tenant SaaS architecture with advanced workflows, built to scale.

3–5 Weeks
Pre-seed startupsB2B SaaS foundersComplex workflows
  • Everything in MVP Sprint, PLUS:
  • Multi-tenancy & Role-Based Access Control (RBAC)
  • Complex API & Deterministic AI Workflows
  • Stripe Billing with Webhooks & Usage Metering
  • PostHog / Mixpanel Analytics Setup
  • Priority QA & Load Testing

60-Day Zero-Bug Warranty: Post-launch fixes and edge-case patches handled free for 60 days.

Scalable SaaS ready for enterprise customers, payments, and scale.

Startup & Systems Care

Fractional CTO
$795/mo

$495/mo

Only 1 slot left this month

Post-launch peace of mind and fractional senior engineering.

Ongoing
Post-launch foundersSolo foundersFractional CTO
  • Up to 20 hours/mo senior dev time (fixes & tweaks)
  • Server/Database monitoring & uptime telemetry
  • Priority Slack/WhatsApp support
  • 1 Monthly Strategy & Architecture Call
  • Overage: $35/hr transparent rate

Direct Founder Access: Same-day turnaround on critical production patches.

Keep shipping with confidence with a dedicated technical partner.

B2B Internal Systems10–21 Days

Internal AI Systems & Ops Engine

Custom Fixed Setup+ low monthly maintenance

Custom internal tools, automated lead/outreach engines, and deterministic AI pipelines that eliminate 15–30 hours of manual team work every week.

ROI Guarantee: If the system does not save 15+ hrs/week within 30 days, we refactor free until it does.

Explore Internal Systems
Agency PartnershipFixed Per-Sprint

White-Label Agency Engineering

Fixed Wholesale Quote(50%+ agency gross margin)

Your silent senior engineering arm. We scope, build, and deploy SaaS apps, client portals, and AI tools under your agency brand so you keep 50%+ gross margins.

Partner Guarantees: Strict NDA · 24-Hr Wholesale Quote SLA · 100% Fixed-Margin Protection.

Explore White-Label
Fixed scope & locked pricing
No surprise invoices
100% GitHub source code ownership
50% upfront · 50% on live launch
Direct communication with senior engineer

Every project starts with a free discovery call. All sprints include our milestone delivery terms: 50% upfront, 50% upon live deployment.

08/The founder

Built by an engineer,
not a sales team.

I spent years watching founders pay agencies $15–30k, wait four months, and receive code they couldn't maintain. Or try DIY builders and hit a wall at auth and billing.

Existify is the third option. AI speed under senior engineering judgment, rigid timeboxes, and full source code ownership.

You work with me directly, from the first call to handover.

Connect on LinkedIn

09/FAQ

Asked before
every sprint.

2 sprint slots open for November

Have an idea worth testing?
Let's launch next week.

Book a free 30-minute call. Leave with scope, timeline, and a fixed quote.

or email sahil@existify.dev