The Startup OS

Stop duct-taping
your stack.

cusoso Sign gives early-stage founders the tools to run the business from day one — CRM, invoicing, contracts, and team approvals — in one structured platform.

See how it works
No credit card required Ready in minutes Your data, your server
app.cusoso sign.com
cusoso Sign
Dashboard
CRM
Orderbook
Documents
Dashboard
F
Leads
24
+12%
Revenue
€48k
+8%
Invoices
7
3 pending
Pipeline
Discovery
8
Proposal
5
Closing
3

The first year is brutal.

Most startups don't fail because of the product. They fail because of everything around it.

Your CRM is a spreadsheet

Leads fall through the cracks. Follow-ups get forgotten. Your pipeline lives in a file called "clients_final_v3.xlsx".

Invoices go out late

You're too busy building to bill. Cash flow suffers. Every delayed invoice is money you've already earned but haven't received.

Contracts live in email threads

Board approvals happen in WhatsApp. Customer contracts go back and forth for weeks. Nothing is signed, tracked, or filed properly.

Seven tools, zero overview

Notion, Pipedrive, Stripe, DocuSign… and you're paying for all of them separately. Your data is fragmented. Your team is confused.

One platform

Everything a founding team needs.

Four integrated modules. No duct tape. No spreadsheets. No chaos.

01

CRM & Lead Pipeline

Capture prospects, move them through stages, and never miss a follow-up.

02

Orderbook & Invoicing

Create orders, generate professional PDF invoices, and track what's been paid.

03

Document Signing

Handle contracts, board resolutions, and approvals with a full audit trail.

04

Access & Teams

Role-based access, business units, and a full audit log — built for teams from day one.

CRM & Pipeline

Never lose a deal in the chaos of early growth.

From first prospect to signed customer — cusoso Sign tracks every stage of your pipeline, logs every interaction, and reminds you when to follow up. Kanban or table view, your choice.

  • Kanban and table views with drag-and-drop stage updates
  • Automatic nurturing for deals closing beyond 6 months
  • Built-in event reminders and marketing funnel tracking
app.cusoso-sign.com/crm
Discovery · 8
Acme Corp
€12,000 · Follow-up today
Beta GmbH
€8,500 · Call next week
Proposal · 5
Startup XY
€24,000 · Sent 3 days ago
Closing · 3
Venture AG
€38,000 · Closes Friday
app.cusoso-sign.com/orderbook
Recent Invoices
RE-00042
Acme Corp · 15.03.2026
€4,760.00
Paid
RE-00041
Beta GmbH · 10.03.2026
€12,400.00
Pending
RE-00040
Venture AG · 01.03.2026
€31,200.00
Paid
Orderbook & Invoicing

Get paid. Every time. On time.

Create orders, track line items, and generate professional PDF invoices in seconds. Know exactly what's been billed, what's outstanding, and what's overdue.

  • One-click professional PDF invoices with your branding
  • Consolidated invoices across multiple line items
  • Push notifications for overdue deliveries and payments
Document Signing

Board decisions don't belong in a chat thread.

Handle customer contracts, board resolutions, and internal approvals directly inside cusoso Sign. Every document signed, every decision logged — with a clean audit trail.

  • In-app approval workflows for contracts and resolutions
  • Digital signatures with timestamped audit log
  • Board resolutions, NDAs, and customer contracts in one place
app.cusoso-sign.com/documents
Documents
Service Agreement — Acme
2 signatures required
Signed
Board Resolution Q1/2026
Awaiting 1 signature
Pending
NDA — Investor Meeting
Draft
Draft
app.cusoso-sign.com/admin/users
Team Members
A
Anna Schmidt
anna@startup.io
Admin
M
Max Müller
max@startup.io
Manager
L
Lisa Weber
lisa@startup.io
User
Access & Teams

Built for teams from day one, not retrofitted.

Invite your co-founders and first hires, assign roles, and keep data organized by business unit. SSO support for Microsoft and Auth0 means your team gets in fast, without security compromises.

  • Five role levels from user to super admin
  • SSO with Microsoft (Azure AD) and Auth0
  • Full audit log for every action across the platform
4
integrated modules
CRM, Invoicing, Documents, Access
1
unified platform
Everything connected, nothing siloed
hours saved
No more tool-switching tax
0
spreadsheets needed
Structure from day one
Get started today

Your foundation is
one click away.

Stop cobbling together your stack. Start on solid ground — with the structure that lets you move fast without breaking things.

No implementation hustle. No enterprise bloat. Just structure.