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Renee knew something wasn’t right. As VP of Brand and Marketing she had overseen some big investments in her company’s marketing automation and analytics in attempts increase efficiency. Now, it was taking weeks to launch campaigns that used to take days.
Reporting was fragmented. It didn’t give accurate guidance for the future. ROAS was slipping, nurturing was haphazard, and her team was frustrated. She knew she would be held accountable.
This happens because strategies change, teams evolve, and competitors innovate. If your martech stack doesn’t adapt, the systems meant to drive automation and generate data start slowing you down instead of helping you grow.
A martech stack audit is how you fix this. It’s a structured review of your tools, data flows, and reporting systems to identify what is broken, underused, or blocking growth.
Done correctly, it helps you reduce wasted spend, improve data accuracy, and get campaigns out faster by fixing the systems your team depends on every day.
Why audit your martech stack?
A martech stack audit gives you clarity into the systems you have. This lets you avoid over-spending on tools that actively block your growth and helps you grow your return on marketing spend.
Your marketing systems are one of your largest expenses outside of people. When they are not aligned with your business, you actively lose marketing pace.
Data and reporting must change to match evolving company strategies and KPIs. It is impossible to plan and justify change without a clear baseline understanding and investment justification.
An audit breaks the cycle of one-off approvals without holistic planning.
When Renee came to us, her team was arguing about whether to add a new attribution platform. The debate dragged on for weeks. Everyone had an opinion, but no one had complete visibility into what was already in place or how it connected. When we mapped their stack during the audit, we discovered they were already paying for three different tools that claimed to do attribution, but none were properly integrated. The conversation immediately shifted from “which tool should we buy?” to “how do we actually wire the tools we already own to answer the questions we’re asking?” They ended up foregoing potentially over $100k in new costs anually and got better data out of what they were already paying for.
Signs You Need a Martech Stack Audit
You should audit your martech stack if you are seeing:
- Campaigns taking longer to launch than they used to
- Conflicting data across tools (e.g. GA4 vs. ad platforms)
- Declining ROAS, rising CAC, or unclear attribution
- Requests for new tools before fixing existing ones
- Manual workarounds, CSV exports, or shadow tools
- Teams saying “we don’t trust the data”
If two or more of these are true, your stack is likely blocking growth.
How to prepare for a martech stack audit
Without proper strategic grounding, a stack audit is a wasted exercise. Executives must ensure an audit is led by clearly defined strategic goals, success metrics, and tactical programs. Without this grounding, you cannot make decisions based on the results.
Clarify your strategic goals and success metrics. Avoid wasted effort by clearly defining the current and near-term go-to-market strategy and success metrics. This ensures the team is marching in the same direction.
Systems and processes do not serve strategy directly; they enable and accelerate execution. Have the marketing team list the tactics that will realize these goals. Using a growth framework like VICE (Visitor, Inquiry, Conversion, Engagement) is a great way to define tactics based on use-cases.
Set constraints and expectations. Share constraints around budget, timelines for change, and expectations from other executives and key contributors like IT or data teams. Be transparent about what’s realistic.
Assign a cross-functional team. Include a clear project lead (usually a director or VP), experts from each relevant department, and often a project manager. Make sure stakeholders from marketing, sales, IT, data/analytics, and marketing operations are represented.
Prioritize the audit. Team members will need their workload shifted, or external contractors will need to be hired. The longer the audit takes, the less accurate it will be because things change constantly.
Once kicked off, the auditing team must execute a process of documentation and assessment, followed by summarizing recommendations for executive approval.
What’s involved in a martech stack audit?
A complete martech stack audit typically covers these areas:
- Tool inventory
- Integrations and data flows
- Tracking and event schema
- Data and reporting accuracy
- Tool costs and ROI
- Workflows and dependencies
- Marketing automation use cases
- Failed or stalled initiatives
Below, we’ll break down how to evaluate each one in practice.
Reviewing tools in your stack
Get a full inventory of your systems. This is as simple as a spreadsheet of systems, owners, costs, and renewal dates. Document what each tool is supposed to do and who is responsible for maintaining it.
Make sure people understand what each system actually does. Sketch out workflows and purposes at a high level. This often reveals tools that were purchased for a specific initiative but never properly adopted.
One B2B SaaS company we audited had 53 tools in their stack. During the discovery process, we found that the CRO tool (VWO) was managed by the web team but hadn’t been used for an active test in eight months. Another tool was set to auto-renew at $18K annually, but only two people even had login credentials, and neither had logged in that quarter.
Integrations and data flows
Build a visual diagram of all your data flows. Map what data is passed between systems, decision points, and supporting middleware. Don’t forget manual imports, exports, and CSVs. Tools like Miro or Lucidchart let multiple teams work together to create an accurate picture.
Get your customer journey in shape by adding your channels to your diagram. Document what’s sending emails, delivering ad audiences, and how you pull response data for reporting. Include handoffs with agencies and partners.
Document how data flows into key platforms. This includes census tools, reverse ETL platforms like Hightouch, tag managers like Google Tag Manager, server-side integrations, Shopify apps, lambda functions, and manual imports.
Event schemas and tracking taxonomy
Review your current tracking taxonomy across all downstream tools, analytics platforms, advertising conversion pixels, attribution tools, and any product analytics systems.
Audit event completeness, custom events, user properties, and consent mode integration. Verify that events are firing correctly and that the data you’re collecting matches the data you actually need to make decisions.
An e-commerce brand came to us because their Meta and GA4 attribution numbers were wildly different. When we audited their event tracking, we discovered double-counting issues with their custom pixel conversions and gaps caused by Apple’s Intelligent Tracking Prevention. Their Google Tag Manager was also a mess, old services were still firing, and some conversion events were being sent through both GTM and Segment, creating duplicates. Cleaning this up improved their confidence in ROAS reporting and saved the team hours of manual reconciliation every week.
Data accuracy and reporting accuracy
Ensure you know where you have trustworthy data. Document where important customer data lives between your CRM and marketing automation. Know what data is in your warehouse and if it can be used for reporting. Identify the most reliable source for all key information.
Gather your most frequently used and critical reports from all systems. Look at reports pulled externally from advertising channels or other resources. Validate that the numbers these reports show are actually accurate and that stakeholders trust them.
Tool costs and ROI
Collect annual costs, renewal dates, and contract terms for every tool in your stack. Calculate cost per user, cost per use case, and cost relative to the value delivered.
Identify tools that are underutilized, redundant, or delivering poor ROI. Be honest about which tools are “nice to have” versus “must have.”
Dependent reports, teams, and workflows
Identify which reports are business-critical and who depends on them. Map which teams rely on which tools for daily work.
Document cross-team dependencies. For example, does marketing automation depend on data from the CRM? Does the sales team rely on attribution reports from marketing? Who breaks if a specific tool goes down?
Marketing automation use cases
Review workflows and campaigns within your marketing automation platform. Audit existing automations to identify low-hanging fruit for optimization and gaps in your lifecycle messaging strategy.
Document triggers, audience definitions, and how these workflows connect to your broader customer journey. Identify opportunities to improve onboarding, retention, winback, and cross-sell campaigns.
Failed or stalled initiatives
Interview end-users to get insight on frustrations, ideas for improvement, and what the team can’t live without. You don’t want to throw out something critical while trying to fix things.
Ask about initiatives that were started but never completed. Often, these stalled projects reveal gaps in capability, training, or integration that are still blocking progress.
During an audit for an online retailer, the marketing team mentioned they’d tried to set up predictive audiences for their paid media campaigns six months earlier, but gave up. When we dug in, we found the data pipeline was half-built. Customer attributes were flowing into their CDP, but no one had configured the destinations to push those audiences to Facebook and Google Ads. The capability was already paid for; it just needed to be wired correctly. Once we finished the integration, they immediately saw a 23% improvement in ROAS on their prospecting campaigns.
Teams affected and stakeholder alignment
Identify all teams affected by the stack: marketing, sales, IT, data, product, customer success, and operations. Each team will have different needs and pain points.
Conduct stakeholder interviews to understand how each team uses the stack, where they experience friction, and what outcomes they need to achieve. This helps you avoid optimizing for one team while accidentally breaking workflows for another.
How to document your audit findings
Build a document that consolidates the results of your martech stack audit. This is intended for executives so they can have clarity and approve next steps. It also guides the implementation team in making changes.
Create a comprehensive audit deliverable that includes:
- Current state summary: Visual stack diagram, inventory of all tools, integration map, and data flows
- Validated materials: Review the results with the whole team to correct errors. This includes building a list of systems that need refactoring or replacing, areas working well, and opportunities for upskilling. All materials should be updated and validated.
- Gap analysis: Areas where capabilities are missing, underutilized, or broken
- Quick wins: High-impact, low-effort improvements that can be tackled immediately
- Long-term opportunities: Larger transformational initiatives that require planning and investment
Translate findings into an executive narrative. This should be a brief summary of the current state, areas that are truly broken and demand immediate assistance, and longer-term opportunities for improvement.
The audit team should provide a prioritized 30/60/90 day plan to get the biggest improvements quickly. Longer-term goals can be summarized for larger transformational planning.
Include financial impact wherever possible. This starts with savings from removing systems and the costs of adding new ones. It should also include projected changes in KPIs based on recommended changes: improved conversion rates, reduced CAC, increased customer LTV, time saved, or faster campaign launches.
All of this must ladder up to tactical use-cases and executive strategy.
Store and socialize audit materials. All audit details should be stored in a shared space and socialized with other teams. The whole organization can then use this to make informed decisions aligned with marketing and technology strategy.
Key stakeholders who should be involved:
- Executive sponsor: Usually CMO or VP of Marketing who champions the initiative and approves budget
- Project lead: Director or VP who owns day-to-day execution and decision-making
- Marketing operations: Owns the day-to-day management of marketing tools
- IT/Engineering: Responsible for integrations, security, and technical implementation
- Data/Analytics: Validates data accuracy and reporting integrity
- Sales operations: Ensures alignment between marketing and sales systems
- Finance: Validates costs and ROI projections
How to set priorities after your audit
The C-Suite should be able to take the audit summary and clearly understand what’s needed, why, and what it will cost. They can approve and champion improvements with confidence.
Start with broken, business-critical systems. If a system is actively losing revenue or blocking your team from doing their jobs, fix it first. These are your “stop the bleeding” priorities.
Next, focus on high-impact, low-effort improvements. Quick wins build momentum and demonstrate the value of the audit. They also free up team capacity for larger initiatives.
Then tackle strategic gaps. These are capabilities you don’t have today but need to achieve your growth goals. They often require new tools, integrations, or significant process changes.
Finally, plan transformational initiatives. These are large, complex projects that require significant investment and cross-functional coordination. They should be phased over quarters, not weeks.
Align priorities to business outcomes, not just tool features. For every recommendation, clearly articulate which KPI will improve and by how much. This keeps the team focused on impact, not just “doing stuff.”
If done well, the audit enables the team to immediately start work with a shared vision. They will have a clear understanding of the systems involved and their dependencies so they can execute quickly.
Equally importantly, they will be aligned on the KPIs and business outcomes they’re trying to achieve. Rather than just taking orders, they will be able to take initiative and implement changes that ladder up to execution. This reduces rework and improves results.
With clear priorities and ownership, there will not be confusion over responsibility. The teams will be self-identifying and have a unified purpose.
Following changes, it is key for the team and executives to validate the results. Metrics need to be reviewed to ensure efficiency has increased and business KPIs are improving in ways directly attributable to the audit.
Do you need external consultants for a martech stack audit?
There is no reason an audit cannot be carried out internally. However, if it is hard to prioritize on top of regular responsibilities, or if the team lacks knowledge of the overall martech landscape, experts can improve outcomes.
A martech stack audit has to be a priority. Things change while the audit is progressing, so it’s critical that it be completed quickly. If your team is already stretched thin, bringing in external help can compress the timeline from months to weeks.
If there is significant misalignment within the organization, the right partner can bridge those relationships with a neutral outlook. Sometimes internal teams are too close to the problem or too invested in defending past decisions. An external perspective can cut through politics and focus on what actually works.
Audits are often blocked by “organizational lore,” where people are resistant because “we’ve tried that before” or “that’s how we’ve always done it.” Challenging these assumptions is critical; last year’s failed initiative may be exactly what you need today. External consultants can push back on these narratives in ways that internal teams cannot.
If you do not have team members up to speed on the state of the art, you can limit your opportunities. A good test is whether people on your team have worked at other organizations recently. If not, you may want support in understanding “The State of the Possible.”
It can also be helpful to have the stamp of approval from a respected partner. This provides validation to recommendations and confidence that projected ROI is realistic.
Regardless of external assistance, the internal team will be a critical group of subject matter experts. They must be closely involved in the process. No consultant can replace the institutional knowledge your team has about your business, your customers, and your constraints.
Transform your stack from a cost center to a growth engine
A martech stack audit is not a one-time event, it’s a shift in how you think about the systems that power your business. When you have clarity on what you own, how it connects, and where it’s broken, you can finally stop reacting to problems and start proactively building growth.
The teams that win are the ones that treat their stack as a competitive advantage, not a necessary evil. They know what’s working, they ruthlessly cut what isn’t, and they invest in the capabilities that matter.
A simple visual map is the fastest way to reveal gaps and misalignment in your stack.
Use Stack Builder to map your martech stack in 5 minutes.
We have a proprietary drag-and-drop Stack Builder that will automatically detect many of your marketing systems. You can jump right into diagramming your tools and systems. You can get a good understanding of your martech landscape to start moving the process forward.
The Stack Builder also lets you track costs and investment, making it a valuable resource for ongoing management.
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