3 Important KPIs to Measure on a Web Development Provider

Tuesday Solutions
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Most web development providers will gladly take your money—but can they deliver?

Some providers promise the world but leave you with half-baked websites, endless revisions, and clients breathing down your neck. So, how do you separate the pros from the amateurs?

It all comes down to key performance indicators for web development partners—the objective, measurable proof that a web development partner isn’t just talking a big game but actually delivering results.

In this article, we’ll break down three critical KPIs that can help you evaluate a web development provider before you sign on the dotted line. But here’s the catch—these are just the beginning. As an SEO agency, you have other key metrics that can make or break your projects, and if you’re not tracking them, you might be leaving money on the table. 

1. Website Performance Metrics

No matter how well-designed a website is, if it’s slow or frequently down, it’s a liability. Your clients don’t care how hard your team worked—they care about whether their site loads fast, stays online, and converts visitors.

What to Measure:

  • Uptime & Availability: Your provider should guarantee 99.9% or higher uptime—anything less means lost revenue and a damaged reputation.
  • Pagespeed Score: Google rewards fast sites, and slow ones get buried. A Google Pagespeed score of 90+ on both mobile and desktop is non-negotiable.

Why It Matters for SEO Agencies:

SEO rankings tank when pages take forever to load. Slow sites increase bounce rates, lower engagement, and cost your clients potential leads. An SEO-friendly web development is the key. If a web development provider isn’t optimizing for speed and reliability, they’re setting your SEO campaigns up to fail.

How to Track It:

  • Use Google Pagespeed Insights to monitor speed.
  • Check uptime via hosting service dashboards.
  • Regularly audit site performance before, during, and after major updates.

2. Development & Delivery Metrics (DORA Metrics)

A web development provider isn’t just there to build—they need to deliver fast, high-quality, and reliable work. DORA (DevOps Research and Assessment) metrics help measure whether they’re keeping up.

What to Measure:

  • Deployment Frequency: How often does the provider successfully push updates? Higher frequency means faster iteration and response to SEO needs.
  • Lead Time for Changes: How long does it take for a simple request (like updating a CTA or fixing a form) to go live? Ideally, changes should be implemented within days, not weeks.
  • Change Failure Rate: How many updates break something? A low failure rate means the provider is testing their work before launch.
  • Time to Recovery: If something goes wrong, how quickly can they fix it? Faster recovery means less damage to rankings, conversions, and client trust.

Why It Matters for SEO Agencies:

SEO is fast-moving—algorithm changes, campaign launches, and landing page optimizations all require agile execution. If your provider drags their feet on changes, you’re stuck watching opportunities slip through your fingers.

How to Track It:

  • Monitor deployment logs to see update frequency.
  • Measure how long it takes for requests to go live.
  • Track rollback frequency—too many reversions signal sloppy development.

3. Technical SEO Support Metrics

Your web development partner isn’t just there to code—they need to actively support your SEO strategy. Poor development choices can tank rankings, while proactive SEO-friendly development can improve results.

What to Measure:

  • On-Page SEO Score: Pages should score high on tools like SEMrush, Ahrefs, or Moz—if not, they need fixing.
  • Crawl Error Resolution: Developers should proactively identify and resolve 4xx/5xx errors before search engines penalize rankings.
  • Mobile Optimization: A site’s mobile usability score should be 90+ to ensure strong rankings on mobile search.
  • Page Indexability: Key pages must be crawlable and indexed—otherwise, all SEO efforts go to waste.

Why It Matters for SEO Agencies:

A web developer who doesn’t understand SEO is a liability. If they’re launching sites with broken links, poor structure, or unoptimized code, your rankings suffer. A true partner builds with SEO in mind, helping you achieve higher rankings and better user experiences.

How to Track It:

  • Use Google Search Console to check crawl issues.
  • Run mobile usability tests with Google’s Mobile-Friendly Test tool.
  • Audit pages with SEMrush or Ahrefs to ensure technical SEO performance is intact. 

How to Hold a Web Development Provider Accountable

Tracking KPIs is one thing—making sure your web development provider actually meets them is another. Many SEO agencies struggle with unreliable partners who promise the world but fail to deliver. 

The key is accountability—ensuring your provider is consistently hitting the benchmarks that keep your campaigns running smoothly. 

Here’s how you can keep them in check:

1. Define KPIs Clearly Before Signing the Contract

Most problems start when expectations are vague. Your agreement should explicitly state measurable KPIs such as:

  • Uptime & Pagespeed Goals – Ensure 99.9% uptime and a 90+ Pagespeed score for both mobile and desktop.
  • Delivery Timelines – Set expectations for average turnaround times on standard requests (e.g., bug fixes, landing page updates).
  • Technical SEO Commitments – Confirm that on-page SEO elements, crawl error resolution, and mobile optimization are included in the scope.
  • DORA Metrics for Development – Require transparency on deployment frequency, rollback rates, and issue resolution times.

Pro Tip: Use penalty/reward clauses in contracts. If they fail to meet SLAs (e.g., missing deadlines or allowing critical downtime), there should be consequences. Conversely, consider performance bonuses if they exceed expectations.

2. Implement a Transparent Reporting System

If you don’t measure it, you can’t manage it. A reliable provider should proactively report on KPIs rather than making you chase them for updates.

Set Up a Simple KPI Dashboard

Require your provider to maintain a shared reporting dashboard tracking:

  • Uptime & Performance – Weekly updates from monitoring tools like Google Pagespeed Insights & UptimeRobot
  • SEO Health Reports – Monthly audits from tools like Google Search Console, Ahrefs, or SEMrush
  • Delivery & Bug Fix Rates – Regular status reports on issue resolution and deployment frequency

Pro Tip: Use a simple Google Sheet or a dedicated dashboard (like Notion, Trello, or Asana) where KPIs are updated regularly. If they refuse to provide visibility, that’s a red flag.

3. Schedule Regular Check-Ins (And Make Them Meaningful)

Your provider should act like an extension of your team, not an outsourced task rabbit. Hold weekly or biweekly review meetings to:

  • Review recent deployments, performance scores, and resolved issues.
  • Discuss upcoming projects and possible SEO impacts.
  • Address roadblocks before they become bottlenecks.

Pro Tip: If your provider is only reactive (fixing problems after they happen) instead of proactively optimizing performance, they aren’t a real partner.

4. Set a Trial Period Before Long-Term Commitment

Many SEO agencies jump into long-term contracts too soon, only to regret it later. Instead, start with a 1-3 month trial where performance is measured before full commitment.

What to Evaluate in the Trial Phase:

  • Responsiveness & Communication – Do they respond within 24 hours?
  • Execution Speed – How fast do they deliver common requests in terms of website speed and SEO impact?
  • SEO-Friendly Development – Are they implementing structured data, page indexing, and other technical SEO elements without you asking?
  • Problem-Solving Approach – Do they think strategically or just follow instructions?

Pro Tip: Offer a test project before finalizing a contract. If they struggle with a small task, they won’t handle your agency’s long-term needs.

5. Have a Backup Plan (Don’t Get Stuck with One Provider)

Even with all safeguards in place, things can go south. If your provider starts missing deadlines, delivering poor-quality work, or failing KPIs, you need a backup plan.

How to Protect Your Agency:

  • Document Everything – Ensure code access, website credentials, and development workflows are all stored in an internal system.
  • Work with Multiple Vendors – Keep a second provider or freelancer in the loop so you’re never fully dependent on one vendor.
  • Have an Exit Plan – Define termination clauses in your contract so you can easily switch providers if needed.

Pro Tip: If your provider resists sharing documentation or creates dependency traps, cut ties early. These are only several of the web development accountability metrics you should monitor. 

Red Flags When Choosing a Web Development Partner

You think expanding your SEO agency’s services should be simple. Your clients already trust you for rankings, so adding web development should be seamless—right? 

But then reality hits. Missed deadlines. Slow response times. Bug-ridden sites. Suddenly, instead of growing your agency, you’re stuck cleaning up someone else’s mess.

When measuring web development success, remember that not all web development partners are built for SEO agencies. Some lack the skills, communication, or flexibility to support your agency’s fast-paced demands. Spotting the red flags early can save your agency from endless headaches, frustrated clients, and lost revenue.

Here’s how to recognize the warning signs before it’s too late.

1. No Understanding of SEO

A development partner who doesn’t factor in SEO will slow down your campaigns and hurt rankings.

What to watch for:

  • They don’t mention site speed, structured data, or Core Web Vitals.
  • Their work lacks proper heading structures, redirects, and clean code.
  • They can’t explain how they optimize sites for SEO performance.

If they only focus on aesthetics, you’ll end up fixing costly mistakes later.

2. Poor Communication and Project Management

Without structured updates and clear workflows, projects drag out, leading to delays and misalignment.

What to watch for:

  • No dedicated project manager or task-tracking system.
  • Inconsistent updates and unclear timelines.
  • Resistance to using project management tools like Asana or Slack.

A web development partner should integrate into your workflow, not slow it down.

3. Inflexibility in Scope and Scaling

As your agency grows, your partner should be able to scale with you.

What to watch for:

  • Limited team capacity with no plan for handling more work.
  • Rigid contracts that don’t allow for scope adjustments.
  • Struggles with larger projects or custom requests.

If they can’t adapt, they’ll eventually limit your ability to expand.

4. No Proven Track Record or References

An experienced partner should have measurable results to back up their claims.

What to watch for:

  • No case studies or SEO-focused projects in their portfolio.
  • Generic testimonials with no performance data.
  • Hesitation to provide direct client references.

Without proof of past success, there’s no guarantee they can deliver for you.

5. No Ongoing Support or Maintenance

A reliable partner stays involved beyond project delivery, ensuring long-term site stability.

What to watch for:

  • No defined post-launch support process.
  • Slow response times for bug fixes and security updates.
  • High costs for minor fixes or lack of an ongoing service plan.

A partner that disappears after launch leaves you handling issues on your own.

Choosing the Right Partner

A strong web development partner aligns with your SEO goals, scales with your agency, and provides ongoing support. Before committing, remember these red flags for your web development partner evaluation to avoid costly setbacks.

Key Performance Indicators for Web Development Partners

Choosing the right web development partner isn’t just about technical skills—it’s about measurable performance. The right provider should support your agency’s SEO strategy, efficiency, and scalability. Here’s a quick recap of the key performance indicators for web development partners:

Web Development KPIs for SEO Agencies

  1. Website Performance Metrics – Ensure 99.9% uptime and 90+ Pagespeed scores to keep sites fast, accessible, and ranking well.
  2. Technical SEO Support Metrics – A strong partner prioritizes on-page SEO, crawl error resolution, and mobile optimization to enhance rankings.
  3. Development & Delivery Metrics – Track deployment frequency, lead time for changes, and failure rates to ensure fast, reliable execution.

Without these web development KPIs for SEO agencies in place, a development partner can slow down your agency and hurt your results. The right provider should be a strategic asset, not a bottleneck.

Where to Go From Here

Choosing the right web development provider isn’t just about avoiding red flags—it’s about finding a provider who actively supports your agency’s growth. These key performance indicators for web development partners are a way to achieve it.

If you want a proven framework for vetting web development partners, ensuring seamless execution, and preventing costly mistakes, enroll in our free course:

The SEO Agency Web Development Partner Blueprint

In this course, you’ll learn:

  • The 5 biggest mistakes SEO agencies make when partnering with web developers—and how to avoid them.
  • How bad partnerships lead to client churn, lost revenue, and constant troubleshooting.
  • A step-by-step guide to choosing a scalable, reliable development partner who aligns with your agency’s needs.

Bonus: Get the full KPI Cheatsheet for Web Development Partners—so you can track performance and hold your provider accountable from day one.

Don’t wait until you’re dealing with missed deadlines and frustrated clients. Enroll now and start building the right partnerships today.

written by
Tuesday Solutions
Trusted Webflow partners specializing in e-commerce and website development. Your solution for exceptional results.