Who is Invesp?
Before you commit to any agency, it helps to review what they actually offer, how they price it, and where they focus. Here's what we found when we looked at Invesp.
Invesp is a Chicago-based CRO agency founded by Khalid Saleh, who co-wrote "Conversion Optimization" (O'Reilly). They've run 36,000+ A/B tests across 900+ clients, which is real institutional muscle. The agency works across eCommerce, SaaS, B2B, and finance — not contractors specifically. So they're a credible CRO shop with a deep test library, just one that doesn't lean into trade-specific work.
Recognition: Founded by Khalid Saleh · 36,000+ A/B tests run · 900+ clients · Author of "Conversion Optimization" · Featured in Forbes, Inc., Entrepreneur
Feature review at a glance
Side-by-side
Where Invesp excels
Volume of testing. Running 36,000+ A/B tests means Invesp has seen what works and what doesn't across more variations than most CRO agencies will see in a decade. That gives them pattern recognition — they know which test ideas tend to win in eCommerce, which ones tend to lose in SaaS demo flows, where the high-leverage page elements are. So if you're running a Shopify store or a SaaS funnel and you want a CRO partner with a deep historical reference library, Invesp's test count is a real asset.
And if you're a ecommerce contractor specifically, that trade depth counts for something. Invesp knows the seasonal surges, the buyer hesitations, and the search patterns that generalist agencies miss entirely.
Our take
Invesp's test count is genuinely impressive. But test volume isn't the same as test relevance. Of those 36,000 tests, what percentage ran on contractor websites? Probably close to zero, judging by their case study mix. The discipline is real. The reference library is broad. Just not pointed at trades. So a roofing or HVAC contractor evaluating Invesp would get a senior CRO team without trade-specific benchmarks — which means more inference, more "we ran this test once for a SaaS client and it lifted X%," and less "here's what we've seen on plumbing pages specifically."
Who typically hires Invesp
eCommerce, SaaS, and B2B lead-generation businesses doing $2M+ in annual revenue who want a CRO partner with deep institutional testing history and senior practitioners. Strong fit for Shopify stores, SaaS demo funnels, and B2B form-fill flows.
Where Fervor differs as a Invesp alternative
Invesp and Fervor cover overlapping ground — SEO, Google Ads, conversion work — but the shape is different. Invesp runs that playbook across many industries. Fervor runs it for contractors only, and ties every channel to the same number: booked jobs per visitor. So if you're pulling 2,000 visits a month and the phone only rings 9 times, we don't argue about whether the problem is traffic or conversion. We diagnose which one is actually leaking and fix that side of the funnel.
(Quick way to tell where your gap is: check your Google Analytics. Under 500 monthly sessions usually means you need more visibility — SEO, GBP, paid search. Over 1,000 and the phone still isn't ringing means the conversion path is leaking. Fervor works on both, contractor-side.)
Revenue per visitor
Your traffic has a dollar value. But most agencies won't calculate it because the number isn't always flattering. We measure what each visitor is actually worth in booked revenue, then rank your fixes by which ones move that number fastest.
The Site Inspection
Before we recommend a single change, we score your site across 6 categories against 64 national contractor brands. You get a Fervor Grade™ and a ranked fix list. No sales call required. And no money changes hands.
Conversion-first design
Booked by Design™ doesn't start with a homepage mockup. It starts with conversion benchmarks from 18 trades we've already scored. So layout decisions, CTA placement, form position, the order your services appear on the page, even which photo goes above the fold — all of it is backed by what actually gets contractors booked.
Where Invesp may fall short for contractors
No published contractor case studies. The 36,000+ A/B tests skew heavily eCommerce and SaaS, which means the institutional pattern recognition Invesp leans on doesn't cover contractor-specific variables — emergency service framing, GBP integration with the homepage, mobile-first booking flows for homeowners on a phone in a basement looking at a leak.
Choosing the right agency for your business
Choose Invesp if:
- You need an agency that only works with ecommerce contractors
- You want ecommerce-specific keyword strategy and campaign management
- You value 36,000+ a/b tests run and khalid saleh's "conversion optimization" textbook lineage
Choose Fervor if:
- Your site gets traffic but your close rate from web leads sits under 5%
- You want to know exactly which pages are bleeding leads right now
- You need a website rebuilt around revenue per visitor, not just how it looks
- You want a Canada-based agency that works with US and Canadian contractors
One more thing. Invesp and Fervor cover overlapping ground. The honest split is shape, not service line: Invesp is built for breadth across industries; Fervor is built for depth across contractor trades, with revenue-per-visitor measurement on every account. Some contractors review both options and pick the fit that matches the way their team thinks about marketing.
Questions to review before hiring Invesp
Does Invesp work with home service contractors?
No prominent contractor case studies in their public portfolio. Their work centers on eCommerce, SaaS, B2B, and finance — verticals where the conversion event is a checkout, a demo signup, or a form fill in a long sales cycle.
Who founded Invesp?
Khalid Saleh, co-author of "Conversion Optimization" (O'Reilly Media). The book is one of the more rigorous textbooks in the discipline, and the agency was built around its methodology.
What does "36,000 A/B tests" actually mean?
Cumulative count across all clients since founding. It's a credible signal of institutional experience, but the relevant question for any specific client is "how many of those tests ran on something that looks like my business." For contractors, the answer is probably close to none.
How much does Invesp cost?
Monthly retainers typically run $4K-$15K depending on scope — research, design, testing, analytics. They're mid-market priced, not enterprise. Specific quotes come from a discovery call.
How does Invesp compare to Fervor Studio?
Invesp brings deep generic CRO experience across 36,000+ tests, mostly eCommerce and SaaS. Fervor runs SEO, Google Ads, and CRO for contractors only, with conversion benchmarks across 18 trades. Different reference libraries, different optimal recommendations — and Fervor adds contractor-specific search and paid-search work alongside the CRO.
Find out which problem you actually have
The free Site Inspection scores your site across 6 categories and tells you whether your bottleneck is traffic or conversion. It takes 30 seconds to submit.
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