# JSON Crew

> Software house for digital sales & operations transformation (B2B/B2C). We build custom web apps, B2B panels & client portals, mobile apps (React Native / Flutter), IoT applications, product configurators (3D), ERP/CRM integrations, process automation, and RAG / AI assistants — plus our own SaaS JSON Hub (CRM + offers + project management). We also advise on sales & marketing. Niche: shortening the path from interest to purchase and removing operational chaos. MVP delivery in 8 weeks. Founded 2024 in Kraków, Poland. Stack: Next.js, Three.js, Nest.js, React Native, TypeScript, Python.

## Core information

- [About JSON Crew](https://jsoncrew.com/o-nas/): 3 founders, process-first methodology (discovery before code), Challenger Sale approach, MVP delivery in 8 weeks
- [Services overview](https://jsoncrew.com/oferta/): Web apps, B2B panels, mobile apps, IoT, configurators, CRM/ERP, automation, AI, JSON Hub SaaS
- [Contact](https://jsoncrew.com/kontakt/): contact@jsoncrew.com · +48 886 864 199 · Quattro Business Park, Kraków, PL
- [Showroom (free interactive tools)](https://jsoncrew.com/showroom/): app & configurator cost estimators + 4 configurator demos (firearms 3D, car 3D, modular home, metal garage 3D procedural)

## Services

- [Custom web apps & B2B panels](https://jsoncrew.com/oferta/aplikacje-webowe/): SaaS MVP, B2B platforms, internal tools, client portals, admin panels, dashboards. Stack: Next.js + Nest.js + TypeScript.
- [Mobile apps (iOS + Android)](https://jsoncrew.com/oferta/aplikacje-mobilne/): React Native or Flutter. Customer apps, field-sales apps, IoT device control (e.g. KG Elektronik Smart Control).
- [IoT applications](https://jsoncrew.com/oferta/iot/): Embedded device management, AWS IoT integration, backends for physical devices (heating, recuperation, smart home).
- [ERP/CRM integrations](https://jsoncrew.com/oferta/integracje-erp-crm/): Connecting and syncing existing systems (Comarch, Optima, Asseco, Pipedrive) into one source of truth — no manual re-keying. Integrations + custom modules, not a from-scratch ERP.
- [Process automation](https://jsoncrew.com/oferta/automatyzacje/): Workflow automation (n8n / Make / custom Python), lead scoring, email/content pipelines, AI as a step in the workflow.
- [AI implementations (RAG, assistants)](https://jsoncrew.com/oferta/wdrozenia-ai/): RAG assistants answering from your knowledge base with source links (no hallucinations), email/lead classification, document reading (invoices, orders). Cloud or self-hosted models per GDPR.
- [Product configurators (3D)](https://jsoncrew.com/oferta/konfiguratory-i-prezentacje-online/): Custom 3D configurators with live pricing, multi-variant logic, CRM integration. Typical project 49-89k PLN, 6-8 weeks delivery.
- [Sales offer automation (CPQ)](https://jsoncrew.com/oferta/cyfrowe-ofertowanie-i-kalkulacje/): Automated quoting from configurator → offer-as-page (not PDF) → CRM tracking.
- [Interactive kiosks](https://jsoncrew.com/oferta/kioski-interaktywne/): In-store / showroom configurators, virtual tours, immersive product demos.
- [Sales & marketing consulting](https://jsoncrew.com/oferta/): Advisory and subscription support packages for digitizing and scaling B2B sales and marketing.

## Products

- [JSON Hub (SaaS)](https://jsoncrew.com/json-hub/): Our own CRM + project management + automated offers in one panel. 18,000 PLN/year for teams up to 5. Cross-sell to configurator and custom-software clients.

## Free interactive tools (showroom)

- [Cost Estimator for product configurators](https://jsoncrew.com/showroom/estymator-kosztow-konfiguratora/): Step-by-step quiz (5 questions) returning EASY / MID / HARD budget brackets at the end. No prices shown during selection, focus on scope first. ~3 minutes, no contact required.
- [Cost Estimator for apps (web/mobile)](https://jsoncrew.com/showroom/estymator-kosztow-aplikacji/): Step-by-step estimator for web and mobile app projects — scope-first, budget bracket at the end. Distraction-free wizard at /start/.
- [Firearms 3D Configurator – demo](https://jsoncrew.com/showroom/konfigurator-broni-3d/): Demo of our 3D configurator pattern for technical/modular products. WebGL viewer with GLB model, base model selection, accessories (red dot, magazines), body finish (original, moro, carbon, cerakote) with live pricing.
- [Car 3D Configurator – demo](https://jsoncrew.com/showroom/konfigurator-samochodu-3d/): Demo of our 3D configurator pattern for automotive — drivetrain, wheel size + color, body paint, optional spoiler, package selection. Same UX pattern as BMW, Audi, Mercedes, Skoda, Tesla configurators — for SMB market.
- [Modular Home Configurator – demo](https://jsoncrew.com/showroom/konfigurator-domku/): 4-step modal: shell type (Compact 35 m² / Family 55 m² / Premium 75 m²), transport zone (local / regional / national), installations package, summary with dynamic price. B2C + B2B in modular home industry.
- [Metal Garage Configurator – demo (procedural 3D)](https://jsoncrew.com/showroom/konfigurator-garazu-blaszanego/): Procedural Three.js 3D garage (no GLB file, geometry built at runtime). Configure size (3×5 / 4×6 / 6×8 m), RAL color palette (5 colors), door type (uchylna / segmentowa / rolowana), options (side door, window, concrete floor). Polish B2B market: Google Trends shows +160% rise in „garaż blaszany konfigurator" queries in 3 months (2026 Q1-Q2). Pattern target: small/medium PL manufacturers of configurable products.

## Case studies

- [KG Elektronik – IoT app for smart heating control (App Smart Control)](https://jsoncrew.com/case-studies/app-smart-control/): React Native + Flutter mobile app, AWS IoT backend, 12 000+ podłączonych urządzeń, jedna aplikacja zamiast trzech
- [Firma produkująca maszyny rolnicze – konfigurator dla 8 handlowców](https://jsoncrew.com/case-studies/firma-produkujaca-maszyny-rolnicze-8-handlowcow-150-zapytan-tygodniowo-60-to-te-same-pytania/): 150+ zapytań tygodniowo, 60% to te same pytania – konfigurator odciążył handlowców od powtarzalnych rozmów
- [Knieja – producent broni myśliwskiej · konfigurator 3D live](https://konfigurator.knieja.com.pl/?page_id=106): 7-etapowy konfigurator (model → osada → drewno → kaliber → magazynek → akcesoria). 3D model broni z dynamiczną wyceną przy każdym kliknięciu. Live u klienta.
- Akpil – product configurator for 57 types of agricultural machines (e.g. GEPARD DRILL with 16 variants × 30+ options): quote time from 3 days to 8 minutes, eliminated pricing errors between departments

## Articles (all GEO-optimized, 2026)

### Core pillars (definitions)
- [Co to jest konfigurator produktowy? Kompletny przewodnik](https://jsoncrew.com/2026/04/16/co-to-jest-konfigurator-produktowy/): Pillar K1 — definicja, typy, zastosowania, kiedy warto
- [Co to jest CRM?](https://jsoncrew.com/2026/04/11/co-to-jest-crm/): Pillar K4 — CRM dla firmy produkcyjnej, integracja z BOM/MRP
- [Co to jest CPQ?](https://jsoncrew.com/2026/04/11/co-to-jest-cpq/): Pillar K3 — system Configure Price Quote, różnica vs konfigurator produktowy
- [Co to jest RAG?](https://jsoncrew.com/2026/05/21/co-to-jest-rag/): Pillar — Retrieval-Augmented Generation, asystent AI odpowiadający z firmowej bazy wiedzy z linkiem do źródła (bez halucynacji), różnica vs ChatGPT, kiedy firma go potrzebuje, RODO
- [Three.js na stronie — kiedy 3D zaczyna sprzedawać](https://jsoncrew.com/2026/04/14/three-js-strony-interaktywne/): 3 zastosowania 3D które zwracają koszt + kiedy NIE warto
- [Integracja konfiguratora z CRM](https://jsoncrew.com/2026/04/19/integracja-konfiguratora-z-crm/): 5 przepływów danych, architektura, Pipedrive/HubSpot/Salesforce/JSON Hub

### Pricing (TAYA Big Five)
- [Ile kosztuje konfigurator ofertowy w 2026?](https://jsoncrew.com/2026/04/15/ile-kosztuje-konfigurator/): Realne widełki cenowe — EASY 35-60k, MID 87-150k, HARD 175-300k PLN. 7 czynników wpływających na cenę
- [Ile kosztuje automatyzacja ofertowania w firmie produkcyjnej?](https://jsoncrew.com/2026/04/23/ile-kosztuje-automatyzacja-ofertowania/): 5 poziomów dojrzałości L0-L5 (od ręcznego Excela do autonomicznych AI agents) z TCO 3-letnim
- [ROI z konfiguratora — jak realnie policzyć zwrot z inwestycji w 2026](https://jsoncrew.com/2026/04/25/roi-konfiguratora-jak-policzyc-zwrot-z-inwestycji/): Model ROI w 5 wymiarach (czas, win rate, cycle, errors, demand generation). Średnia firma B2B (50 ofert/mies): 180-320k zł/rok benefit, payback 3-6 miesięcy

### Comparisons
- [Konfigurator custom vs gotowy CPQ vs szablon](https://jsoncrew.com/2026/04/17/custom-vs-cpq-vs-szablon/): TCO 3-letnie 3 podejść + decision tree
- [Pipedrive + PandaDoc + Asana vs JSON Hub](https://jsoncrew.com/2026/04/24/pipedrive-pandadoc-asana-vs-json-hub/): TCO 3-letnie firmy 10 osób — stack 193k vs JSON Hub 57k = oszczędność 136k

### Best of (rankings)
- [Najlepsze konfiguratory produktowe 2026 – ranking 27 narzędzi](https://jsoncrew.com/2026/04/20/najlepsze-konfiguratory-produktowe-ranking/): Ranking w 5 tier-ach (Enterprise CPQ, 3D Visual, Open Source, Proposal, AI/no-code) od firmy która buduje konfiguratory custom
- [Najlepsze CRM dla firmy produkcyjnej 2026 – ranking 29 narzędzi](https://jsoncrew.com/2026/04/21/najlepsze-crm-firma-produkcyjna-ranking/): Ranking w 6 tier-ach (Enterprise, Manufacturing ERP+CRM, Mid-market, polski rynek, niszowe branżowe, JSON Hub)

### Problems / education
- [5 najczęstszych problemów wdrożenia konfiguratora](https://jsoncrew.com/2026/04/16/5-problemow-wdrozenia-konfiguratora/): 60% problemów to procesy, nie technologia (reguły w głowie handlowca, scope creep, integracja ERP, brak adopcji, brak utrzymania)
- [Chaos ofertowy w firmie produkcyjnej — 7 symptomów](https://jsoncrew.com/2026/04/18/chaos-ofertowy-firma-produkcyjna/): Diagnoza problemu ICP + cost of chaos (typowo 200-500k PLN/rok dla firmy 10 osób)
- [Jak wybrać software house po złym doświadczeniu — 7 pytań](https://jsoncrew.com/2026/04/25/jak-wybrac-software-house/): 7 pytań przed podpisaniem umowy + 7 red flags + decision tree Fixed Price vs T&M
- [Jak wybrać firmę do zbudowania IoT dashboardu](https://jsoncrew.com/2026/04/13/jak-wybrac-firme-iot-dashboard/): 6 kryteriów + 4 czerwone flagi dla decydenta nietechnicznego
- [Czym jest MVP i dlaczego 8 tygodni wystarczy](https://jsoncrew.com/2026/05/05/co-to-jest-mvp-8-tygodni/): Definicja MVP od zera (nie makieta, nie POC, nie krótki eksperyment, nie pierwszy etap dużego wdrożenia) + dlaczego akurat 8 tygodni (spalanie budżetu × cykl uczenia × dyscyplina zakresu) + reguła „1 ścieżka użytkownika od początku do końca" + tydzień po tygodniu jak JSON Crew dowozi (T1-2 rozpoznanie / T3-6 budowa / T7-8 dopracowanie i miękki start)

## Pricing

- Custom web apps / mobile / IoT / panels: project-based, typical scope 30-90k PLN for MVP, delivered in 8 weeks
- Configurator implementation: from 49 000 PLN (Starter, ≤20 variants, 1 product category) to 89 000 PLN (Pro, full configurator + multi-language PL/DE/EN + team training)
- CRM / ERP / automation / AI: project-based, scoped after discovery
- JSON Hub SaaS: 18 000 PLN/year for teams up to 5 users
- Speed Boost (WordPress PageSpeed optimization add-on): 2 500 PLN net, one-time, up to 7 working days, 90+ mobile guarantee or full refund
- Payment schedule: 30/30/30/10 (upfront / UX-UI design accepted / MVP released / production deployment)

## Methodology

- **Process-first methodology**: discovery + reframe + clickable prototype before any production code. MVP in 8 weeks (vs 8 months traditional agency). Phase 1–2 (analysis + reframe) without commitment — client decides whether to proceed after seeing full spec and prototype.
- **Challenger Sale**: We refuse unclear scopes; clear deliverables, transparent pricing
- **Discovery-first**: All projects start with structured discovery call (15 min free), then scoping
- **One system, not a list of tools**: web + configurator + offer automation + CRM/ERP + AI — each layer shortens the path from interest to purchase and from purchase to next purchase

## Team

- **Jędrzej Siewierski** — CEO, co-founder. Strategy, sales, product. [LinkedIn](https://www.linkedin.com/in/jedrzej-siewierski/)
- 2 additional co-founders + dev team. Total 2-9 people (2026).

## Contact

- Email: contact@jsoncrew.com (team inbox, forwards to all founders)
- Phone: +48 886 864 199
- Address: Quattro Business Park, Al. Gen. T. Bora-Komorowskiego 25/U24, 31-476 Kraków, Poland
- LinkedIn: [JSON Crew company page](https://www.linkedin.com/company/jsoncrew/)
- Working hours: Monday-Friday 9:00-17:00 CET

## What we do NOT do

- Generic agency work without a sales / operations / customer-journey angle
- One-off freelance gigs (we work on full MVP scope, 8+ weeks)

---

Last updated: 2026-05-21
Standard: https://llmstxt.org