011h + report
Audit
We visit your business, map the manual processes and deliver a written report with proposals prioritised by impact and cost.
Learn moreAUTOMATION · CODE · AI
The management software your SME needed, built to measure.
Plexum replaces the spreadsheets that break and the repeated tasks with systems that run on their own. We audit, implement and maintain — with a fixed scope and a fixed price.
Fixed price before we startSource code and docs are yoursPersonalized attention
2+ years
Building software running in real production
Fixed scope
No surprise invoices — fixed price before we start
<2 wks
Typical delivery of audit + written report
30 days
Bug warranty after code delivery
How we work
Three formats, one method
From the first visit to ongoing maintenance. Pick the entry point that matches where your business is.
02Fixed scope
Implementation
We build the custom solution (code + AI + integrations) with a fixed scope, visible milestones and documented delivery.
Learn more03Monthly · 2-4h
Maintenance
We support you continuously: tweaks, small improvements, monitoring and incident resolution of what already works.
Learn moreDocuments
Documents that read themselves
Delivery notes, invoices and orders arriving as PDF or paper get scanned, extracted and filed without anyone typing a thing. AI agents read, validate and move the data to the right place.
- OCR + AI on delivery notes and invoices
- Validation and incident alerts
- Traceability and automatic filing
ALBARÀ.pdf
OCR + IA
EXTRACTED ✓
- Supplier
- Frigorífics Vall S.L.
- Note no.
- A-2026/0847
- Date
- 03/06/2026
- Batch
- L-558123 · exp. 09/06
- Amount
- €1,284.50
Operations
Your back office, unified
We replace the shared Excel that keeps locking up with a custom web app: stock, orders, invoicing and KPIs in one place, accessible to the whole team at once.
- Multi-user web application
- Real-time dashboards and KPIs
- Integration with the tools you already use
Mobile app
Your operations, always in your pocket
Check and manage your business from your phone — light or dark mode, wherever you are.
PLEXUM · BARCELONA
What we build
From a landing page to a full ERP
The packages are the «how». This is the «what»: the kind of project we deliver.
Corporate websites
Sites with identity, performance and SEO. Next.js, Astro or whatever the project calls for.
Conversion landings
Pages focused on capturing leads or selling a product. Tracking, A/B and analytics included.
Ecommerce
Custom stores or on Shopify/WooCommerce. Payments, logistics, order flows.
Back office & ERP
Internal apps to replace chaotic spreadsheets: stock, orders, invoicing, dashboards.
Integrations
We connect existing systems: ERPs, CRMs, Brevo, Stripe, DocuSeal, proprietary APIs.
SME automation
Delivery-note OCR, AI agents that move documents, proactive alerts, smart email flow.
Time tracking
Legal clock-in system for multiple companies: web/PWA, history, calendar, holidays.
Don't see it on the list?
Tell us your caseThe process
From conversation to a running system
Four clear steps. You know what happens at each moment and what it costs before you start.
- STEP 01
Discover
30 min · free
We understand your business and the manual processes that repeat every week.
- STEP 02
Audit
1 week
We deliver a report with opportunities prioritised by impact and cost, with a savings estimate.
- STEP 03
Implement
2-8 weeks · fixed scope
We build the custom solution with code + AI + integrations. Visible milestones, documented delivery.
- STEP 04
Maintain
Ongoing
Support, tweaks and small improvements. The network scales with you.
Why Plexum
Serious software, human care
The rigour of a product team with the direct attention of whoever builds your system.
Fixed scope, fixed price
No surprise invoices. We know what we're building before we start — and what it costs.
Real applied AI
No buzzwords. Agents that read documents, make decisions and move data in real production.
Documented delivery
Every project ends with source code, technical documentation and a training session with your team.
Mediterranean · tech
Human attention, honest pace, no Silicon Valley pretensions. Catalonia as a base.
Technology
Proven tools, chosen for the project
No fads, no lock-in to a single vendor. Each piece is chosen for what your case needs.
Backend
PythonFastAPIPostgreSQLSQLiteRedis
Frontend
Next.jsReactThree.jsTailwindAstro
AI
OpenAIAnthropicGeminiLangChainpdfplumberTesseract OCR
Integrations
RESTGraphQLWebhooksBrevoDocuSealCalendly
Infrastructure
DockerVercelGitHub ActionsVPS
Founding experience
“Operations platform for school catering”
Plexum's founder spent 2 years building the internal operations platform of a real school catering company: replacing chaotic spreadsheets with a unified web app (FastAPI + SQLite + AI agents) that manages orders, production, delivery notes and food-safety records. The Plexum method comes out of that experience.
À
Àlex Gutiérrez
Founder · Plexum
BARCELONA · CATALUNYA
Put numbers on what you're saving by doing it by hand
A free 30-minute conversation. You'll leave with a clear idea of what can be automated and what it costs.