Every system is an island.
In between them, one person and one spreadsheet.
The ERP doesn't talk to the CRM. The CRM doesn't talk to WhatsApp. The database lives in one tab, the report in another. To bring it all together, someone exports a spreadsheet from one side, tweaks it by hand, and imports it into the other, every week, sometimes every day. The data arrives late, arrives wrong, or arrives after the decision has already been made.
That rework carries an enormous invisible cost: hours of skilled people spent copying and pasting, typos that turn into losses, and know-how trapped in side spreadsheets that only one person understands. When the systems talk to each other, that work disappears, and the data ends up where it needs to be, the moment it's needed.
The systems you already use, genuinely connected.
We don't swap your operation for a new tool. We connect what already exists, via API where it's available, via migration where it isn't, so the data flows on its own.
ERP, CRM, and databases
Direct connection between the ERP, the CRM, and the database, so orders, customers, inventory, and history stay in sync, no double entry and no outdated copies.
WhatsApp and service channels
Integrating WhatsApp with internal systems, so support can look up and record real data. That's how Marina, at Santamarina, confirms an appointment directly in the clinic's schedule.
APIs and external tools
Payment gateways, shipping calculators, data warehouses, third-party services: we connect via API and build the integrations that don't exist yet in your stack.
ERP migration
When the current system has no API (like Xica's C7), we migrate to a platform with rich integration (catalog, inventory, and POS) without stopping the operation.
Integration is usually the first step toward something bigger. The same team delivers process automation, AI agents, and custom AI, always on your real data, never on a copy.
Map, connect, and flip the switch without stopping the operation.
Mapping the systems and the flow
We identify which systems exist, what each one stores, where the APIs are, and where the manual export/import points are. Senior team from the first contact.
Designing the integration
We define what connects via API, what requires migration, and which business rules need to travel along with the data, so nothing gets lost along the way.
Building and validating
We develop the integrations and pipelines, validating the data at every step in short cycles. The operation keeps running while we test.
Flipping the switch and evolving
We go live with no downtime, measure the result, and keep evolving. The integration's know-how becomes a system. It doesn't stay locked in the head of whoever ran the spreadsheet.
Integration is, at its core, Freedom of Memory
When the systems talk to each other, the business's rules and history stop living in side spreadsheets and in the head of whoever runs the operation, and start living in the system, accessible and reliable.
At Positec, commercial rules by customer, region, and volume are now applied by the system in real time, not by the salesperson's memory.
At LIQUIDZ, the report is born from BigQuery connected to WhatsApp. One source of truth, with no diverging spreadsheet versions.
People leave, but the know-how remains. Xica's migration left the integrations direct and stable for good.
Connected systems already running in production.
Integration and migration already running in the operations of companies that trusted NexUnio. The numbers are real and verifiable.
Xica Moda Mineira
Fashion · e-commerceERP migration from C7 (no API) to Bling (with a rich API): catalog, multi-store inventory, and POS migrated with no downtime. From there, direct and stable integrations with all 3 sales agents.
- C7 → Bling with no operational downtime
- End of manual exports/imports
- Average ticket of R$451 held at scale
Positec
Industry · distributionOrder platform with native ERP integration and commercial rules applied in real time. An order closed in the field enters the ERP instantly, no double entry back at the office.
- Native integration with the ERP
- 53k+ orders · R$125M billed
- 208 reps on the same standard
LIQUIDZ
Beverage e-commerceData warehouse (BigQuery) integrated with WhatsApp. Leadership asks in plain language and the report arrives ready, with no one building a spreadsheet.
- 40h → 2h of spreadsheet work per week
- Report ready every Monday, 7am
- 100% automatic since 2025
Santamarina
Healthcare · dermatologyIntegration with the clinic's management system and schedule. The Marina assistant checks availability in real time and confirms the appointment directly in the system: it doesn't simulate, it executes.
- Direct connection to schedule and management
- 121k+ automated messages
- Attendance rate 54% → 73%
System integration, no fine print.
What is system and API integration for companies?
It means making the software your company already uses (ERP, CRM, WhatsApp, database, payment gateway, internal tools) talk to each other automatically, usually via API. Instead of someone exporting a spreadsheet from one system and importing it into another, the data flows on its own, instantly, with no rework and no outdated copies.
What if my ERP doesn't have a public API?
That's common, and it has a solution. Xica Moda Mineira used the C7 ERP, which had no public API: every integration turned into a manual spreadsheet export and import. NexUnio carried out a full migration from C7 to Bling (with a rich API), migrating catalog, multi-store inventory, and POS with no operational downtime. From there, every integration became direct and stable.
Can WhatsApp and databases be integrated at the same time?
Yes. At LIQUIDZ we connected the data warehouse (BigQuery) to WhatsApp: leadership asks in plain language and gets the report back ready. What used to be 40 hours of spreadsheet work a week became 2 hours, with the report ready every Monday at 7am, 100% automatic since 2025. The integration ties together the data source, the channel, and the business rules in a single flow.
Will the ERP migration stop my operation during the switch?
It doesn't have to. Xica's ERP migration was done with no operational downtime: the company kept selling while catalog, inventory, and POS were migrated. We work through a controlled pipeline, validating the data at every step before flipping the switch.
How does integration connect to Freedom of Memory?
When integration exists, rules and history stop living in side spreadsheets and in the head of whoever runs the operation. At Positec, the specific commercial rule for each customer, region, and volume is now applied by the system in real time, not by the salesperson's memory. The know-how becomes a system: people leave, but the know-how stays.