Integrate Lago with FastBill to automate workflows, sync data between apps, and eliminate repetitive tasks with AI-powered automation.
Create Customer in Fastbill when New Payment Arrives in Lago
Create Invoice in FastBill when New Payment Arrives in Lago
Add Payment for Invoice to FastBill when New Payment Arrives in Lago
Send Invoice by Email using FastBill when New Payment Arrives in Lago
Create Revenue in FastBill when New Payment Arrives in Lago
Start from a real workflow other teams are already running.
Lago
When this happens...
New Payment Arrives
New Customer Created
New Plan
New Invoice Created
FastBill
Automatically do this!
Create Customer
Create Invoice
Add Payment for Invoice
Send Invoice by Email
Create Revenue
Add Payment for Revenue
Create Offer
Search Customer
Search Invoice
Canceling an Invoice
Create Customer in Fastbill when New Payment Arrives in Lago
Use this flowCreate Invoice in FastBill when New Payment Arrives in Lago
Use this flowAdd Payment for Invoice to FastBill when New Payment Arrives in Lago
Use this flowSend Invoice by Email using FastBill when New Payment Arrives in Lago
Use this flowCreate Revenue in FastBill when New Payment Arrives in Lago
Use this flowAdd Payment for Revenue in FastBill when New Payment Arrives in Lago
Use this flowCreate Offer in FastBill when New Payment Arrives in Lago
Use this flowSearch Customer in FastBill when New Payment Arrives in Lago
Use this flowSearch Invoice in FastBill when New Payment Arrives in Lago
Use this flowCanceling an Invoice in FastBill when New Payment Arrives in Lago
Use this flowEverything you can automate between Lago and FastBill.
When this happensTriggers
A trigger is an event that starts a workflow.
Runs when new payment arrives
Runs when a new customer is created.
Triggers when a new plan is created.
Triggers When a new invoice is created
Triggers when a new offer was created within your FastBill account.
Triggers when a new customer is created within your FastBill account.
Action is the task that follows automatically within your Lago integrations.
Create a new invoice
Retrieve filtered customers
Get filtered subscriptions
Show invoices and usage totals
Show invoice details & totals
Show all subscription plans

Follow a simple walkthrough to create, test, and launch your first automation.
Connect your apps
Link the apps you want to automate.
Configure your workflow
Set up triggers, actions, and map your data.
Test & publish
Test your workflow and publish it.
Recognized by leading review platforms and trusted by 10,000+ businesses worldwide.
Just describe the task in plain English. viaSocket AI selects the right apps, builds the workflow, maps the fields, and prepares everything for review before you publish.

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FastBill is a cloud app for German invoicing & accounting. Writing offers and invoices, paying your bills or preparing your tax return is easier than ever with FastBill.
Learn moreSign up for a free viaSocket account, then authorize both your Lago and FastBill accounts. From there, pick a trigger in one app and an action in the other. Your first workflow can be live in under five minutes.
Yes. viaSocket uses instant triggers where available, so data moves between Lago and FastBill as soon as the event happens. Scheduled polling triggers run at a maximum interval of 15 minutes.
Yes. You can map specific fields, apply filters to skip records that do not match your conditions, and transform values before they reach FastBill. No coding required.
Yes. You can set up a workflow where Lago triggers actions in FastBill, and a separate workflow where FastBill triggers actions in Lago. Both run independently and in real time.
viaSocket logs every run so you can see exactly what succeeded and what failed. Failed tasks can be retried from the dashboard without re-configuring the workflow.
Yes, there is a free plan that covers basic workflows between Lago and FastBill. Paid plans unlock higher task limits, faster polling, and advanced features like multi-step workflows and conditional logic.
No. The entire Lago and FastBill integration is built through a visual, point-and-click interface. Code blocks are available if you want them, but they are never required.