kaifaai.app — AI Development · Fixed Pricing, 30% Below Market

Q: Why are you 30% cheaper than market? Is quality compromised?

Two reasons: (1) fully remote — no office or sales-team overhead; (2) we maintain mature codebases for all 28 tracks, so we never charge you to reinvent wheels. Quality-wise, core members come from OpenAI, Google, DeepMind and peers; every delivery includes internal code review plus full test coverage.

Q: Is the quote final? Any mid-project price increases?

Before signing, we break requirements into a feature list written into the contract — a fixed all-in price. If you add new requirements mid-project, we quote them separately and only proceed with your approval.

Q: Who owns the source code and IP?

You do, 100%. Delivery includes complete source code, deployment docs and technical docs, with the GitHub repo created under your own organization.

Q: Not sure which option fits — can we talk first?

Yes, the first consultation is free. We'll recommend the most cost-effective path for your stage (fundraising / PMF validation / scaling) — and we'll openly talk you out of anything that isn't worth building.

Q: Payment methods?

USD settlement or bank transfer. Standard schedule is 30-40-30: signing, mid-project demo, acceptance.

Q: The team is pseudonymous — how do I verify capability?

Before signing we can arrange video due diligence (real faces), show sanitized case studies; you may also appoint a third-party reviewer you trust.

Q: What's the relationship between kaifaai.app and 51kaifa.app?

Sister sites: kaifaai.app builds AI products only (agents, RAG, fine-tuning, digital humans, AI MVPs — 28 directions with upfront pricing); Web3 full-stack work (chains, wallets, contracts, dApps) lives on 51kaifa.app. The two sites can cross-deliver. kaifaai.app is invested in by Chainfir Capital.

Q: How do you keep AI agent projects from going off the rails?

Every agent project ships with an eval set: accuracy, hallucination rate and refusal boundaries are all quantified, and delivery includes a reproducible quality report. An agent without evals is superstition — we don't ship superstition.

Q: Can you build small tools like an AI mock-interview app?

Yes. A validation demo takes as fast as 12 hours; single small tools are priced in the $3,800–$9,800 band. Start small, scale once it clicks.

AI-Native Delivery

Building with AI means more, faster, better, cheaper

We write the code, tests and docs with AI every day — half the saved hours become your speed, the other half your discount

🧩

More · One team, 44 specialties

AI support bots, agents, RAG knowledge bases, LLM fine-tuning, voice, vision, AI MVPs — all covered in-house. You don't juggle several vendors, and you never play messenger between them.

28 areasone point of contact

⚡

Faster · Demo in 12 hours

Once scope is clear we start immediately: a clickable validation demo ships in as fast as 12 hours, revised the same day. Full MVPs land in 2–6 weeks — 3-5× faster than classic outsourcing, because AI drafts the code, tests and docs and senior engineers review every line.

12 hoursfastest MVP

🛡️

Better · Senior review built in

Core members come from OpenAI, Google and top-tier Chinese tech. Every AI-written line is reviewed by a senior engineer, then the whole codebase goes through an internal review pass before delivery. You own 100% of the source code (pushed straight to your GitHub org), plus a 60-day bug-fix warranty.

You own it60-day warranty

💰

Cheaper · 30% below market

The hours AI saves go straight into your quote: no sales layer, no middlemen, prices printed on this page. Pay 30/40/30 by milestone — or start with just the validation demo, then decide.

30% offvs. market rate

* 12 hours applies to validation demos (site / landing page / single AI tool / clickable prototype). Projects involving contracts, multiple clients or third-party audits get a written schedule before kickoff.

AI Development

AI Development Services

Built on GPT / Claude / DeepSeek / open-source LLMs — put real AI inside your product

Agents & Conversation Agents / Support bots / Voice / Sales

AI Support Chatbot

On your site, WeChat or Telegram, trained on your material. Where it stops: it answers what it knows and hands off what it doesn't, no inventing. Simple FAQ build from $1,800.

Market $15,000–50,000
$9,800+Save 35%

AI Agent (Tool-Using)

Multi-step reasoning with tool calls, LangGraph under the hood. The part everyone skips is evaluation; without a test set it's guesswork, so the harness gets built in.

Market $50,000–150,000
$34,800+Save 30%

AI Voice Agent / Outbound Calls

ASR, LLM dialog and lifelike TTS chained together. For outbound calling, settle local compliance first — we build and integrate, we don't advise on the legal side.

Market $14,000
$9,800+Save 30%

TG / Discord AI Bot

Moderation, FAQ and companion bots. Runs across many groups at once and can take paid subscriptions. Most useful while a community is still cold.

Market $8,500
$5,800+Save 32%

📈

AI Sales Agent (SDR)

Lead capture, automated outreach and follow-up, intent scoring, CRM write-back. The three most tedious steps run themselves; your team only closes.

Market $28,000
$18,800+Save 33%

🧲

AI Recruiting Screener

JD parsing and matching, resume ranking, AI first-round interviews with auto scoring. Cuts screening time by roughly 70%.

Market $19,000
$12,800+Save 33%

Models & Data RAG / Fine-tuning / Vision / Search

RAG Knowledge Base

How much of your documentation is already out of date? Half of RAG quality is source quality. We build vector search with cited answers, and tidy the corpus while we're in there.

Market $22,000
$14,800+Save 33%

LLM Fine-Tuning (LoRA / Full)

Often you don't need fine-tuning; solid RAG gets there cheaper. When it is the right call, we train Llama / Qwen / DeepSeek on your data and deploy privately, terminology and tone included.

Market $28,000
$18,800+Save 33%

Computer Vision

Recognition, detection, OCR, industrial quality control. We train the model and hand you an API. On factory floors, sample volume and lighting set the ceiling, so we check both first.

Market $40,000+
$28,000+Save 30%

AI Analytics / Smart BI

Ask questions in plain language, get charts and weekly reports back. MySQL, Excel, Lark. Start with whichever report annoys you most.

Market $22,000
$14,800+Save 33%

Workflow Automation

n8n, Dify, Zapier. A form comes in, AI processes it, the CRM or the email updates itself. Kill the one repetitive task you hate most and the effect is immediate.

Market $5,500
$3,800+Save 31%

AI Coding Assistant

Indexes your own codebase: Q&A, PR drafting, test generation. Deployed privately, code never leaves your servers.

Market $34,000
$22,800+Save 33%

🔍

AI Search & Recommendations

Semantic search plus personalised ranking, with recall, re-ranking and telemetry closed in one loop.

Market $30,000
$19,800+Save 34%

📟

Edge / On-Device AI

Model pruning and quantisation, running on Raspberry Pi, Jetson or industrial boxes — inference works offline.

Market $40,000
$26,800+Save 33%

AI Products MVP / SaaS / Apps / Avatars / Video

AI Product MVP

Frontend, backend and billing on LLM APIs, live in four to eight weeks. Demo-ready, and ready to take a real first payment. Just validating? The core demo ships in 12 hours.

Market $25,000–60,000
$17,800+Save 29%

AI Image Generation App

Text-to-image, image-to-image, try-on, product shots. Stable Diffusion or Flux, deployed privately on your own servers, data never leaves. Custom style training only if you need it.

Market $19,000
$12,800+Save 33%

AI Content SaaS

Bulk copy, scripts, multilingual marketing content, with templates, team collaboration and subscriptions. Fast generation isn't the hard part; review and rewrite is, so that's where the work goes.

Market $25,000
$16,800+Save 33%

AI Mobile App

iOS and Android, for chat, voice or image products. We handle store submission and in-app payments too, because more projects stall there than in the code.

Market $50,000+
$34,800+Save 30%

🎭

AI Digital Human / Avatar

Likeness cloning, lip-sync and voice replication; one script becomes one ready video. Built for livestream selling and bulk content.

Market $25,000
$16,800+Save 33%

🎬

AI Video Pipeline

Script to storyboard to finished cut, wired to Sora / Kling / Veo, with auto voice-over, subtitles and batch editing.

Market $30,000
$19,800+Save 34%

🎓

AI Education Coach

Speaking practice, worked explanations, personalised paths, visible progress. Retention is the hard part, so streaks and feedback carry the weight.

Market $24,000
$15,800+Save 34%

🛒

AI E-commerce Assistant

Smart sourcing, listing pages and multilingual publishing, AI shopping guide. Most of the repetitive work for cross-border sellers.

Market $21,000
$13,800+Save 34%

Industry Copilots Legal / Health / Professional

⚖️

AI Contract Review

Clause extraction, risk flagging, version diffing, exportable review notes. Private deployment, contracts never reach third parties.

Market $32,000
$21,800+Save 32%

🩺

AI Pre-Consultation Assistant

Structured intake, report interpretation, follow-up reminders. Boundary stated up front: no diagnosis, no prescriptions, pre-visit prep only.

Market $38,000
$24,800+Save 35%

General Services Websites / Design / Ops

Marketing Website / Landing Page

Responsive, multilingual, baseline SEO. One to two weeks. Fast, but not sloppy.

Market $2,500–8,000
$1,800+Save 28%

UI/UX Product Design

From user flows to high-fidelity Figma. AI products don't share a visual language with ordinary apps, and we've spent enough time there that you won't need to art-direct us.

Market $7,000
$4,800+Save 31%

Managed Ops (Monthly)

Monitoring, patching, backups, small iterations, monthly. One person who knows your stack, so you never re-explain the background.

Market $2,600/mo
$1,800 /moSave 31%

Technical Advisory (Hourly)

Architecture reviews, tech selection, code audits, sitting with you through investor tech due diligence. Billed hourly, and two hours is a perfectly fine engagement.

Market $400/hr
$280 /hrSave 30%

💡 All prices are "from" prices — final fixed quote based on a written scope; no price increases after signing. USD settlement or fiat accepted, milestone payments (30-40-30).

Client Cases

17 AI projects we have shipped

Shown by type and region, with details redacted · client names and contract values stay under NDA, and we walk through them one by one on a video due-diligence call

AI AgentNorth America

Sales outbound agent

Multi-step + CRM sync

Replaced a 6-person team · 8 wks

AI BotHong Kong, China

Multilingual support bot

CN/EN/JP/KR

87% resolution rate · 5 wks

RAGSingapore

Legal knowledge base

Vector search + citations

94% retrieval accuracy · 6 wks

AI ImageUS

E-commerce product photos

Try-on + scene redraw

92% lower image cost · 7 wks

AI SaaSShenzhen

Short-video script SaaS

Templated batch generation

8,000+ paying users · 9 wks

AI BotSEA

TG community bot

Multi-group + moderation

Serving 300+ communities · 4 wks

AI VoiceJapan

Appointment callback system

ASR + lifelike TTS

+35% answer rate · 6 wks

Fine-tuneNorth America

Medical QA model tuning

Private deploy + LoRA

91% domain accuracy · 8 wks

AI MVPUS

AI resume optimizer

LLM API + subscriptions

50K users in 3 months · 6 wks

VisionEurope

Industrial QC vision

Defect detection model

<0.3% false rate · 14 wks

AI BISingapore

Smart BI assistant

NL-to-report

80% less reporting labor · 6 wks

AI SaaSMiddle East

Multilingual content platform

20+ languages at scale

20x content output · 8 wks

AI AgentKorea

E-commerce ops automation

Listing + support flows

5x productivity · 7 wks

AI ImageSEA

AI portrait mini-app

Portraits + outfits

$120K first-month revenue · 5 wks

RAGNorth America

Investment research KB

Private doc Q&A

3x analyst efficiency · 7 wks

AI VoiceHong Kong, China

Trilingual support hotline

Cantonese/Mandarin/EN

24/7 unmanned · 6 wks

Fine-tuneEurope

Support tone fine-tuning

Style + terminology

+22% CSAT · 5 wks

Our Team

Core Team

9 core members across the US and Europe, all with hands-on experience at top-tier tech companies
(pseudonyms and cartoon avatars for privacy/non-compete reasons — real faces on video due diligence calls)

Alex K.

Tech Partner / Architect

Ex-Google Senior Backend Engineer, 8 yrs large-scale distributed systems

🇺🇸 San Francisco, US

GoSystem Design

Sarah M.

Head of AI

Ex-OpenAI Applied Engineer, LLM apps & agent architecture

🇺🇸 New York, US

LLM OpsRAG

Ethan P.

ML Engineer

Ex-DeepMind Researcher, model training & fine-tuning

🇬🇧 London, UK

PyTorchFine-tuning

Mia S.

Head of Product Design

Ex-Meta Product Designer, led redesigns for 10M+ user products

🇸🇪 Stockholm, Sweden

ReactThree.js

Oliver T.

DevOps / SRE

Ex-AWS Cloud Architect, HA clusters & cost optimization

🇮🇪 Dublin, Ireland

KubernetesAWS

Noah F.

Data Engineer

Ex-Tesla Data Platform Engineer, real-time data pipelines

🇺🇸 Austin, US

Data EngVector DB

Ava N.

Project / Delivery Manager

Ex-Revolut Delivery Manager, cross-timezone collaboration veteran

🇱🇹 Vilnius, Lithuania

Node.jsTypeScript

Emma L.

Full-Stack Lead

Ex-Google Software Engineer, frontend performance & tooling

🇬🇧 Manchester, UK

MLOpsEvaluation

Liam D.

Frontend Lead

Ex-Stripe Frontend Engineer, payment-grade UX polish

🇳🇱 Amsterdam, Netherlands

FlutterRust

Plus 20+ contracted remote engineers across US/EU available per project · coverage from US-East to Europe to Asia, 7×16h response

Testimonials

What clients say

Early-stage teams care about three things: on-time delivery, price, and who fixes things after launch

★★★★★

We had nothing but a rough idea. Three weeks later we were demoing a working MVP — customer Q&A and knowledge-base retrieval both live — in our funding pitch, for a fraction of what three overseas agencies quoted.

— AI product founder · Seed round

★★★★☆

Quality was never the issue — multi-turn dialogue and tool calling were rock solid. Working across time zones was rough for the first two weeks, until we fixed a daily overlap window. Sort that out on day one.

— AI SaaS startup · Hong Kong

★★★★★

Fixed pricing saved us the back-and-forth. I added scope twice — one more model, a voice pass — and both times they quoted first and waited for my OK. No hidden fees.

— AI SaaS team · Singapore

★★★★★

In one line: the all-in-one assistant they talked me out of building was the right call — the model simply could not carry it. I spent those two months on users instead.

— AI product team · Southeast Asia

★★★★☆

Speed and pricing were good. My one gripe: the docs were written for engineers, not for me — prompting and evals especially. They added an operator-facing version once I asked.

— AI data product · North America

★★★★★

We had a vague idea and a small budget. They didn't turn us down — they built a working demo first (photo capture + structured output) so we could raise, then started the real build after the round closed.

— AI tools team · Shenzhen

Why we stay pseudonymous: most core members still work at their current companies or are under non-compete and NDA periods, so we don't publish individual identities. Before signing we can arrange a live video due-diligence call, share redacted project write-ups and live product demos, and let you nominate a third party to review the code.

Call for Partners

Co-Build Partner Program

We bring the product direction, design and growth. You bring the engineering team. Nobody pays development fees upfront — we split whatever the product earns.

3 product seats in this first cohort Development fee $0 Net revenue 50 : 50 One-page agreement, signed before kickoff

We bring

Product & Growth

Product direction and requirements: market call, user research, written spec and prototypes — defined before a single line of code.
Design and brand: UI/UX, website and landing pages, sales collateral.
Growth and monetisation: launch traffic, channels, sales and pricing, plus user growth after launch.

You bring

Engineering

The build team: a stable 2–5 person crew (frontend, backend, DevOps), committed for at least 3 months.
Engineering: architecture, code, testing, release, and ongoing technical maintenance.
Delivery cadence: one progress sync per week, milestone demos you can actually click.

Nobody pays

No Cash Upfront

No membership, deposit or training fee from us — no fee under any name.
No upfront development cost from you: your engineering hours are your equity, paid back from revenue.
Servers, model APIs and other direct costs are covered by product revenue first, before the split.

How the money splits

Net revenue = product revenue − direct costs (servers, model APIs, distribution)

Us 50% · product & growthDev team 50% · engineering & delivery

Settled monthly, paid by the 10th of the following month; both sides can audit the numbers.

The ratio is negotiable based on actual effort — 40 : 60 when engineering carries more weight.

If one side exits, revenue share on the live product continues for 12 months, then settles.

We are not looking for another dev shop

We are looking for partners who can judge whether anyone will actually pay for this. Six hard requirements:

Shipped products, with links we can open. We only work with teams that have delivered — decks and resumes alone don't qualify.

You can read the market, not just take tickets. If you think our direction is wrong, you must be able to say exactly why and what to change. That is the whole point.

Full-stack ownership. You can take it from zero to live — architecture, code, deploy, monitoring — without us hiring anyone else.

Demo-able MVP in 4–8 weeks. Core loop first, polish later, with visible progress every single week.

You will sign a one-page agreement. It covers three things only: revenue split, IP ownership, exit terms. Code and brand belong to the project entity; exit is settled against proven contribution.

Fluent in English or Chinese. At least one sync per week, and both sides sign off on major decisions.

STEP 01

Apply

Two minutes: your team, your stack, what you have shipped.

STEP 02

Screening in 48h

We review your work and the fit. You hear back either way.

STEP 03

60-minute review

We walk you through the market, the user and the monetisation — you judge if it can be built.

STEP 04

Sign and build

One page signed, kickoff within 7 days, first demo in 4–8 weeks.

Application received

We'll get back to you within 48 hours. In a hurry? Message the founder directly.

Telegram @briantian →

Rather not fill a form? Email us or reach @briantian on Telegram — same 48-hour reply.

FAQ

Frequently Asked Questions

Why are you 30% cheaper than market? Is quality compromised?

Two reasons: (1) fully remote — no office or sales-team overhead; (2) we maintain mature codebases for all 28 tracks, so we never charge you to reinvent wheels. Quality-wise, core members come from OpenAI, Google, DeepMind and peers; every delivery includes internal code review plus full test coverage.

Is the quote final? Any mid-project price increases?

Before signing, we break requirements into a feature list written into the contract — a fixed all-in price. If you add new requirements mid-project, we quote them separately and only proceed with your approval.

Who owns the source code and IP?

You do, 100%. Delivery includes complete source code, deployment docs and technical docs, with the GitHub repo created under your own organization.

Not sure which option fits — can we talk first?

Yes, the first consultation is free. We'll recommend the most cost-effective path for your stage (fundraising / PMF validation / scaling) — and we'll openly talk you out of anything that isn't worth building.

Payment methods?

USD settlement or bank transfer. Standard schedule is 30-40-30: signing, mid-project demo, acceptance.

The team is pseudonymous — how do I verify capability?

Before signing we can arrange video due diligence (real faces), show sanitized case studies; you may also appoint a third-party reviewer you trust.

What's the relationship between kaifaai.app and 51kaifa.app?

Sister sites: kaifaai.app builds AI products only (agents, RAG, fine-tuning, digital humans, AI MVPs — 28 directions with upfront pricing); Web3 full-stack work (chains, wallets, contracts, dApps) lives on 51kaifa.app. The two sites can cross-deliver. kaifaai.app is invested in by Chainfir Capital.

How do you keep AI agent projects from going off the rails?

Every agent project ships with an eval set: accuracy, hallucination rate and refusal boundaries are all quantified, and delivery includes a reproducible quality report. An agent without evals is superstition — we don't ship superstition.

Can you build small tools like an AI mock-interview app?

Yes. A validation demo takes as fast as 12 hours; single small tools are priced in the $3,800–$9,800 band. Start small, scale once it clicks.

AI Product Development for Early-Stage Startups

Building with AI means more, faster, better, cheaper

More · One team, 44 specialties

Faster · Demo in 12 hours

Better · Senior review built in

Cheaper · 30% below market

AI Development Services

AI Support Chatbot

AI Agent (Tool-Using)

AI Voice Agent / Outbound Calls

TG / Discord AI Bot

AI Sales Agent (SDR)

AI Recruiting Screener

RAG Knowledge Base

LLM Fine-Tuning (LoRA / Full)

Computer Vision

AI Analytics / Smart BI

Workflow Automation

AI Coding Assistant

AI Search & Recommendations

Edge / On-Device AI

AI Product MVP

AI Image Generation App

AI Content SaaS

AI Mobile App

AI Digital Human / Avatar

AI Video Pipeline

AI Education Coach

AI E-commerce Assistant

AI Contract Review

AI Pre-Consultation Assistant

Marketing Website / Landing Page

UI/UX Product Design

Managed Ops (Monthly)

Technical Advisory (Hourly)

Instant Quote Calculator

Startup Bundles · Save Even More

AI Startup Kickoff

AI Growth Boost

17 AI projects we have shipped

Sales outbound agent

Multilingual support bot

Legal knowledge base

E-commerce product photos

Short-video script SaaS

TG community bot

Appointment callback system

Medical QA model tuning

AI resume optimizer

Industrial QC vision

Smart BI assistant

Multilingual content platform

E-commerce ops automation

AI portrait mini-app

Investment research KB

Trilingual support hotline

Support tone fine-tuning

The stack we use every day

Data & Compliance

Models & Evaluation

Cloud & Infra

Core Team

Alex K.

Sarah M.

Ethan P.

Mia S.

Oliver T.

Noah F.

Ava N.

Emma L.

Liam D.

Our Process

Free Discovery Call

Sign & 30% Deposit

Build with Weekly Demos

Launch + 60-Day Warranty

AI Development Daily Brief

What clients say

Co-Build Partner Program

We bring

AI Product Development
for Early-Stage Startups