deciban · AI automations and systems
We build AI agentsAI web appsfunnel dashboardscomputer visionCRM automationsemantic searchdesktop apps
that run in production.
We find the right solution for a real pain in your business — and deliver exactly what was promised.
- 7+
- B2B businesses served
- 48h
- business hours to a proposal
- 2–4
- weeks to a live agent
01 What we build
Six fronts, one delivery standard
- AI agentsservice, triage, qualification
- GTM and CRM automationprospecting, cadence, post-call
- Web platforms and SaaSmulti-tenant, database to deploy
- Data, search and visionwhat was scattered becomes an answer
- Products and desktop appswhat we build for ourselves
- Sites and experiencespresentation that sells
01 / 06
They answer on WhatsApp and the web around the clock, understand text, audio and images, qualify with your business criteria and hand off to a person with the whole conversation in hand.
Already shipped
- Multimodal WhatsApp SDR agent
- RAG scheduling agent for a salon
- Client onboarding through an AI conversation
- Virtual assistant with a live demo
02 The name · Bletchley Park, 1941
Two punched tapes, sliding against the light.
Where the holes line up, there is evidence.
deciban = 10 · log₁₀ (likelihood ratio)
The smallest change in evidence a human being can perceive
In 1941, at Bletchley Park, Alan Turing and I. J. Good weighed evidence by sliding two punched tapes against the light. Where the holes lined up, there was evidence. The unit of that measure is called the deciban.
Deciding under uncertainty by accumulating evidence is what every AI system we build does. That's why the company born as Rabelo Co. in April 2025 swapped a surname for what it does.
What guides us
Trust
Being a company that does things right, one a client can trust before any delivery.
Correctness
Delivering what was promised. Mistakes are stated clearly, never hidden.
Practical and logical
Every solution has a why. Solving the real pain comes before using the trendy tool.
Measured, not mystical
AI is a means, not magic. Results are measured in numbers, not promises.
Founded and run by Rafael Rabelo, AI automation engineer.
03 How it works
From first contact to operation — no surprises midway
- 01Conversation
- 02Briefing
- 03Proposal
- 04Kickoff
- 05Build
- 06Acceptance
- 07Handover
- 08Support
01
Conversation
20–30 min
We understand the pain, what it costs today, who decides and the deadline. In the call itself you know whether we move forward — and why.
04 In action
See an agent in action
The same kind of agent we ship. It waits for you to start — write as if you were one of your customers.
deciban Agent
online · replies in seconds
05 Request a proposal
Tell us what you need.
Talk to our AI or fill in the form. The proposal arrives within 48 business hours.
- 1You tell us the pain and context
- 2We write down what we understood
- 3A proposal with scope, timeline and investment within 48 business hours
deciban Agent
n8n · commercial briefing
By talking to the agent you agree to the processing of the data you share under the Privacy Policy.
06 Prefer to talk?
Book 30 minutes to 1 hour
Pick a weekday and a time between 9am and 5pm (Brasília time). Confirmation arrives by email.
It depends on the scope. Agents and automations usually have a setup fee plus a monthly operating fee; custom systems, a fixed scope by stage. In the call we ask for an investment range so we don't design something out of reach, and the exact figure comes in the proposal within 48 business hours.
A typical agent ships in 2 to 4 weeks, including tone-of-voice tuning and tests with real cases. Platforms ship in slices: the first one, already working end to end, usually lands 1 to 2 weeks after kickoff.
No. We integrate with what you already use — Pipedrive, Kommo, spreadsheets, your team's task manager — and with your current number.
No. Tone of voice and qualification criteria come from real conversations in your operation, and the agent hands off to a person when the conversation calls for it. You can try a real agent on this page.
Each client has isolated databases, credentials and instances. We handle data under Brazil's LGPD, with logged consent wherever personal data is involved and nothing shared across operations.
You do. Server, database and AI accounts are in your name, with transparent monthly costs. At handover, the credentials used during the project are rotated.
You can. Every change becomes a written request with its impact on time and cost before it goes in. If it fits the scope, it's free; if it replaces something, we swap it for an equivalent item.
Your choice: monthly support, with a prioritized queue and a Friday status, or a full handover with docs for another team to operate.
Yes. The work is remote and run in Portuguese or English (C2 level).
The core ones are n8n and Claude, plus OpenAI, Next.js, Supabase and Python when the problem calls for it. The tool is chosen by the pain, not the trend.