FREE RESOURCE — SAAS STACK AUDIT GUIDE

How to sort out your
SaaS integrations

A structured walkthrough for mapping your integrations, finding what's broken, and cutting what's dead. Below is an example of a completed audit so you can see exactly what to do and what to look for.

* 5 sections* 20–30 min to complete* No technical knowledge required* Built by Stakmap
01
// Tool Inventory
What are you actually paying for?
List every SaaS tool your company uses. Be thorough — check your credit card statement. Include anything that touches your product, data, or customers.
Tip: Check your company credit card for recurring charges. You'll almost certainly find something you forgot about.
Tool NameCategoryMonthly CostWho Owns ItDate AddedStill Active?Notes
StripePayments$0/moSarah K03/2022ActivePrimary billing & subscription mgmt
HubSpotCRM$800/moMarketing01/2023ActiveContact & deal sync
ZapierAutomation$149/moAlex M06/2022UnsureMultiple flows, some may be stale
IntercomSupport$74/moSupport team08/2022ActiveIn-app chat & user messaging
SegmentAnalytics$120/moData team11/2022UnsureEvent tracking, last checked months ago
SlackCommunication$12/moEveryone01/2021ActiveAlert pipeline for critical events
MailchimpMarketing/Email$50/moMarketing05/2021ZombieReplaced by HubSpot. Not cancelled yet.
TypeformOther$25/moGrowth09/2022ActiveOnboarding survey
02
// Connection Map
What's talking to what?
For each integration between tools, add a row. Think webhooks, Zapier flows, native syncs, and custom API calls. One row per connection, not per tool.
Tip: Start with your payment tool and trace every place it sends data. These are usually the most connected and the most risky.
From ToolTo ToolWhat It Does (plain English)MethodLast Known WorkingHealth
StripeZapierPayment success triggers onboarding sequenceWebhookUnknownBroken
ZapierHubSpotCreates a deal in CRM on paymentNative syncJan 2024Unsure
SegmentIntercomSends user events for in-app targetingNative syncFeb 2024Healthy
HubSpotMailchimpSyncs contacts for newsletter campaignsZapier/MakeAug 2023Zombie
StripeSlackPosts payment success alerts to #revenueWebhookFeb 2024Healthy
IntercomHubSpotSyncs support tickets as CRM activitiesNative syncFeb 2024Healthy
03
// Risk Checklist
Where are your blind spots?
Go through each item honestly. Unchecked boxes are your risks. Don't guess — only tick what you know for certain.
✓
I can name every tool currently sending or receiving data in my stack.
If you can't name them all, you can't protect them all.
HIGH
All API keys in active use have known expiry dates that are tracked somewhere.
Expired keys are the #1 cause of silent integration failures.
HIGH
No OAuth tokens belong to people who have left the company.
Ex-employee tokens often retain full access to live systems indefinitely.
HIGH
✓
I know exactly what would break if Stripe went down for 24 hours.
Your most critical tool almost certainly has the most undocumented dependencies.
HIGH
All webhooks have been tested and confirmed working in the last 30 days.
Webhooks fail silently. If you haven't tested it, assume it might be broken.
HIGH
✓
I know exactly where customer PII (names, emails, payment data) flows.
Required for GDPR compliance and SOC2 certification.
MED
✓
Every tool in my stack is owned by a named person still at the company.
Unowned tools don't get monitored, updated, or cancelled when no longer needed.
MED
✓
I could safely cancel any single tool without accidentally breaking something else.
If the answer is no for any tool, that's a dependency risk waiting to happen.
MED
There are no tools we're paying for that nobody actively uses.
The average company wastes $135k/year on unused SaaS subscriptions.
LOW
A new engineer could understand our full integration stack from documentation alone.
If it only lives in one person's head, it's one resignation away from being lost.
LOW
6 / 10 checked. 4 unchecked items are active risks — each one is a potential silent failure or security exposure. Address the HIGH items first.
04
// Action List
What needs fixing right now?
Based on sections 1–3, list every issue and assign it. Even if you don't fix it today, writing it down means it won't get lost.
Issue FoundPriorityOwnerStatusDue Date
Stripe webhook URL not updated after last deployCriticalAlex MIn progress20/02/2024
Revoke ex-employee OAuth tokens in HubSpot + SegmentCriticalSarah KNot started25/02/2024
Cancel Mailchimp subscription — zombie tool, $50/moHighSarah KDone15/02/2024
Document all active Zapier flows in NotionHighAlex MNot started01/03/2024
Track API key expiry dates in shared spreadsheetMediumAlex MIn progress01/03/2024
05
// Review Cadence
How to stay on top of it.
A one-off audit decays fast. This is the minimum cadence to keep your stack visible and healthy without it becoming a full-time job.
// MONTHLY
  • Check for any new tools added without being logged
  • Review integrations marked 'Unsure' and resolve them
  • Confirm all active webhooks fired at least once
  • Check for API keys expiring in the next 60 days
  • Review zombie integrations — cancel or reactivate
// QUARTERLY
  • Full tool inventory review — anything to cut?
  • Audit all OAuth tokens — any ex-employees still connected?
  • Review tool ownership — anyone left the company?
  • Check API costs — anything scaling unexpectedly?
  • Test every critical integration end to end
// ANNUALLY
  • Full rebuild of this audit document from scratch
  • Negotiate or review all annual SaaS contracts
  • Review data flows for GDPR / SOC2 compliance
  • Document stack for any new team members
  • Assess build vs buy for any custom integrations
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