Connect your business systems
Connect supported sources such as Google Workspace, Gmail, and other business applications.
For Growing Businesses
Stop Guessing About Your Software Spend.
Your business runs on dozens of software and AI tools. Stack Sixth helps you see what you have, understand what you're paying for, identify what deserves attention, and make smarter software decisions.
Start Your 30-Day Free Trial Book a DemoNo complicated implementation. Connect what you already use and start building your software picture.
What deserves attentionEvidence graded
Slack
Review 5 seats
HubSpot
Renewal in 34 days
Calendly + Chili Piper
Compare overlap
The problem
Your software stack grew one purchase at a time. Who's managing the whole thing?
Subscriptions, owners, costs, renewals, access, and usage signals end up scattered across inboxes, spreadsheets, and teams. Stack Sixth turns that fragmented picture into a decision process.
01
Connect
02
Discover
03
Verify
04
Decide
05
Act
How discovery works
See Your Software Stack—Even Without Enterprise SSO.
Stack Sixth brings together signals from the systems your business already uses to build a clearer picture of your software environment.
Bring your financial evidence
Invoices, subscriptions, and contracts help establish what your business actually pays for.
Add what we can't see
Add applications manually or provide supporting evidence when automated discovery isn't available.
Stack Sixth connects the evidence
Applications, costs, access, renewals, and available usage signals become one software intelligence layer.
Don't have SSO? That's okay.
Stack Sixth doesn't require an enterprise identity stack to get started. It is built for businesses without an enterprise IT department.
Software decisions should be based on evidence—not assumptions.
No Evidence. No Claim.
Stack Sixth distinguishes between what we know, what we can observe, and what we cannot yet verify.
Verified Live
Recent activity has been verified.
Verified Access
Access or a seat has been confirmed, but usage hasn't.
Observed
Supporting evidence indicates activity.
Insufficient Evidence
We don't have enough evidence to make a usage claim.
A connection doesn't automatically mean usage. And missing data doesn't automatically mean waste.
Everything you need to make a better software decision
Start with the questions your business needs answered.
What software are we paying for?
Build a centralized view of applications, subscriptions, owners, and costs.
Who's actually using it?
See verified usage where reliable evidence exists—and know when it doesn't.
Where could we be wasting money?
Surface unused licenses, overlapping tools, renewal opportunities, and other areas that deserve review.
What should we do about it?
Turn findings into decisions: Keep, Reduce, Renegotiate, Cancel, Replace, or Investigate.
Did the decision actually help?
Track actions and their financial impact over time.
SeeUnderstandDecideActMeasure
Product outcome
Stack Sixth tells you what deserves your attention.
Illustrative examples—not validated customer results.
Decision to review
Slack
5 seats show no verified activity for 60+ days.
Potential impact: $900/year
Review seatsDecision to review
HubSpot
Annual renewal in 34 days.
Current annual cost: $14,400
Prepare for renewalDecision to review
Calendly + Chili Piper
Potential functional overlap detected.
Two tools deserve comparison
Compare toolsYou shouldn't have to become a SaaS-management expert to manage your software.
Built for growing businesses—not enterprise software-management teams
You've outgrown spreadsheets, but you're not building an entire software asset-management department.
Founders & CEOs
Know where your software dollars are going.
Finance & Operations
Control spend, contracts, and renewals.
IT Leaders
Understand applications, access, and available usage evidence without chasing spreadsheets.
Fractional CFOs & Advisory Firms
Run evidence-backed software spend reviews across every client — and offer it as a recurring advisory service.
Partner with us →Best suited for software-dependent businesses with approximately 20–250 employees.
Why Stack Sixth
Software grew. The systems for managing it didn't.
Growing businesses adopt software one problem at a time—a CRM, accounting platform, collaboration tool, project-management system, marketing platform, and now an expanding collection of AI tools.
Each purchase can make sense individually. But eventually, nobody has a clear view of the whole. Stack Sixth was built to change that.
Know what you have.
Understand what you're spending.
See what the evidence says.
Make the decision.
Built with growing businesses, not just for them
Now working with our first paying customers.
Stack Sixth recently launched and is helping its first customers better understand and manage their software environments.
One better software decision can pay for Stack Sixth.
Choose the support your team needs.
Growing businesses can spend thousands every month across SaaS and AI tools. Stack Sixth helps you understand where that money is going and which decisions deserve your attention.
30-day free trial • Card required • Cancel before trial ends to avoid billing
Starter
Core software intelligence for growing teams.
$199/month
30 days free · card required
- Core software intelligence
- Spend and renewal tracking
- Evidence-backed recommendations
- Action Center
- Basic reporting
- Email support
Growth
Deeper governance and workflows for growing businesses.
$499/month
30 days free · card required
- Everything in Starter
- Advanced governance
- Team workflows
- Contract intelligence
- Advanced reporting
- More automation
- Priority support
Scale
Advanced controls for established, multi-team organizations.
$999/month
30 days free · card required
- Everything in Growth
- Advanced controls
- Multi-team functionality
- Custom workflows
- Expanded administration
- Premium onboarding
Enterprise
For larger organizations with custom requirements.
Custom
- Custom limits
- Custom integrations
- Dedicated onboarding
- Contract-based access