2025
AI copilot / SaaS
Sage AI
An AI legal assistant: in 3 seconds it finds the right clause across 8,000 contracts and drafts a response with source links.
AI-first digital studio
Digital products powered by AI
We embed AI agents, copilots and LLM services into websites, mobile apps and Telegram Mini Apps. End-to-end — from research to production.
8
years on the market
120+
projects launched
24
in-house specialists
AI
LLM
RAG
ML
AI Copilot
embedded in any product
GPT · Claude · Llama
multi-provider LLM
RAG · Vector DB
search your knowledge base
AI practice
AI inside the product, not bolted on
We do not just plug in ChatGPT. We embed an intelligent layer: agents, knowledge search, copilots, content generation and process automation.
AI agents and copilots
In-product assistants that guide the user through a flow, answer questions and execute actions.
RAG and knowledge search
Vector stores, embeddings and retrieval-augmented generation grounded in the client’s data.
Content generation
Text, images, documents and code — on demand and in the brand style.
AI automation
LLM steps inside workflows, queues and background jobs: classification, enrichment, scoring.
We work with OpenAI · Anthropic Claude · Llama · Vercel AI SDK · LangChain · pgvector · Qdrant
Services
We build things that ship
Six core directions of the studio. Each request gets a dedicated team with industry experience.
AI & LLM development
AI agents, copilots, RAG search and LLM automation embedded into new and existing products.
from $2,900
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Web development
Corporate websites, landing pages and online stores with bespoke design and fast frontend.
from $2,400
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Mobile apps
Native iOS / Android apps and cross-platform solutions built with Flutter and React Native.
from $5,800
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Telegram Mini Apps
WebApps inside Telegram: stores, games, geo-services, lotteries and subscriptions.
from $3,200
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UX / UI design
Product design, design systems and identity. We make interfaces a pleasure to use.
from $1,600
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Backend and highload
Server-side architecture and implementation: APIs, microservices, queues, fault tolerance.
from $3,900
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Support and growth
Ongoing support for live products: new features, bug fixes, monitoring and uptime.
from $800 / mo
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Why CITRUS
What makes our team different
What sets us apart from agencies and freelancers — and why clients return for their next projects.
8 years on the market
In business since 2017 with 120+ projects in the portfolio.
Strong team
Designers, developers, analysts and QA under one roof.
Transparency
Contracts with fixed terms and full access to all assets.
Modern stack
We use 2025 tech: Vue 3, Next.js, Flutter, Go.
Process
Transparent from brief to release
Two-week sprints, a demo after each iteration, a shared task tracker and a single point of contact.
01
Brief and research
We study the business problem, competitors and audience, then prepare scope and estimates.
02
Design and prototype
We design the UI, agree on the visual language and ship an interactive prototype.
03
Development
Two-week sprints, a demo after each one, a shared task tracker.
04
Testing
Manual and automated tests, load testing, security audit.
05
Launch
Production deploy, data migration, client team training.
06
Support
We keep the product alive — grow features and watch the metrics.
Technology
Modern 2025 stack
We pick technology to fit the task — from quick prototype to highload service.
Frontend
Backend
Mobile
Data
DevOps
Portfolio
A few recent cases
Some work is under NDA — here are the ones we can share.
2025
Telegram Mini App
CITRUS Mini App
A hub of entertainment mini-services inside Telegram: referral programme, TON wallet and a catalog of 14 built-in games.
2024
Mobile app
GeoQuest
A city AR quest with geo-points and team leaderboard — 12,000 players finished season one in 6 weeks.
2025
AI automation
NeuroDesk
A ticket pipeline with classification, auto-reply and escalation. Cut the first response time from 3 hours to 90 seconds.
2024
Platform
Lottery Engine
A white-label lottery engine: draws, instant tickets, BI dashboards. Seven brands launched from a single codebase.
2023
Web + Mobile
CryptoWallet Pro
A universal multi-chain wallet — 9 blockchains, in-app swap, NFT catalog and a mobile app.
FAQ
Frequently asked questions
No answer to your question? Drop us a line in Telegram or via the form — we reply quickly.
Landing pages start at $2,400, corporate websites at $4,700. The exact price depends on the scope — we share an estimate within 1–2 business days after a brief.
We work under a contract with milestone payments: 30% upfront, 30% after design approval, 40% on launch. We accept bank transfers and crypto.
Landing — 3–4 weeks, corporate website — 6–10 weeks, mobile or Telegram app — from 8 weeks. The brief will include a precise timeline.
Yes. After full payment you receive all source code and access to all services and repositories. We do not lock clients in.
Yes — support packages start from $800/mo with a guaranteed SLA on response time and regular releases.
For the first project we work with an upfront payment. For long-term clients we can offer post-payment or hourly billing.