Convertibles vs Invesp: Shopify CRO Agency Comparison (2026)
Both Convertibles and Invesp are conversion rate optimization agencies, but they serve different buyers. Convertibles is a Shopify Plus specialist for $2M+ DTC brands that ships testing, landing pages, speed, dev, and paid media under one team. Invesp is a platform-agnostic CRO consultancy founded in 2006 that works across ecommerce, SaaS, and lead generation, from startups to enterprise.
This page lays out where each agency fits, where they overlap, and how to pick.
At a Glance
- Convertibles: Shopify Plus only. Agency launched 2023, founding team brings 10+ years of prior Shopify development experience and a successful 8-figure brand exit. Full-stack DTC growth (CRO plus landing pages plus speed plus dev plus paid media). Multi-variation testing default (2 to 4 variants per test). Official Intelligems partner. 36 published case studies with $2.3M+/month in aggregate measured lift.
- Invesp: Founded 2006, US headquarters in Chicago with international offices. States 900+ clients and 36,000+ completed A/B tests. Platform-agnostic, with dedicated service lines for ecommerce, SaaS, lead generation, and an early-stage startup program. Named clients include eBay, 3M, O'Reilly, and the Special Olympics. Proprietary SHIP Methodology and an in-house testing tool, FigPii.
- Pick Convertibles if: you are a DTC brand on Shopify Plus and want one team that ships winners fast, runs paid media alongside the onsite work, and treats CRO as part of a wider growth program.
- Pick Invesp if: you are not on Shopify, you run a SaaS or lead-generation business, or you want a long-established consultancy for research, audits, or CRO training rather than a Shopify-specific execution team.
Side-by-Side Comparison
| Dimension | Convertibles | Invesp |
|---|---|---|
| Platform focus | Shopify Plus specialist | Platform-agnostic (any ecommerce stack, SaaS, lead gen) |
| Founded | 2023 (founding team: 10+ years prior Shopify dev experience plus 8-figure brand exit) | 2006 (one of the longest-running CRO agencies) |
| Service scope | CRO, landing pages, speed, dev, Google plus YouTube Ads | Fully-managed CRO, conversion research, audits, landing page optimization, analytics and BI, CRO training |
| Paid media included | Yes (Google plus YouTube Ads) | Not listed on public service pages |
| Client profile | $2M+ DTC Shopify Plus brands | Startups through enterprise (eBay, 3M, O'Reilly), across ecommerce, SaaS, lead gen |
| Testing volume claim | 36 published case studies, each at 95% statistical significance | 36,000+ A/B tests across 900+ clients since 2006 |
| Methodology | Multi-variation testing (control plus 2 to 4 variations), shipped by an in-house dev team | SHIP Methodology: research-led process from heuristic review through post-test analysis |
| Tooling | Intelligems partner (third-party testing tool) | FigPii (in-house tool), plus standard testing platforms |
| Engagement gate | $2M+ annual revenue, Shopify Plus | Core program ideal for 1,000+ conversions/month (publicly stated) |
| Pricing | Flexible engagement model, scoped per client | Not publicly stated |
When Convertibles Is the Better Fit
You are a DTC brand on Shopify Plus
Convertibles works on exactly one platform. Every test, speed fix, and theme rebuild is Shopify-specific, which removes the translation layer a platform-agnostic consultancy needs between recommendation and implementation. Invesp's breadth across SaaS, lead gen, and every ecommerce stack is real, but breadth is not depth on your specific platform.
You want winners shipped, not recommended
Convertibles builds and ships its own tests with an in-house dev team, then deploys winning variations to 100% of traffic. If your bottleneck is execution capacity rather than ideas, an execution-led team clears it faster than a research deliverable handed to your developers.
You want paid media and CRO in one loop
Convertibles runs Google and YouTube Ads as the second pillar of its program, so ad creative and onsite tests inform each other inside one team. Invesp's public service pages do not list paid media management.
When Invesp Is the Better Fit
You are not on Shopify, or not in DTC at all
Invesp has dedicated CRO service lines for SaaS, lead generation, and any ecommerce platform. If you run a B2B funnel or a custom stack, Invesp is built for that and Convertibles simply is not.
You want the longest possible track record
Invesp has been doing CRO since 2006 and states 36,000+ completed tests across 900+ clients, with enterprise names like eBay and 3M. If your procurement process weights vendor longevity heavily, an 18-year history is a real differentiator no young agency can match.
You want research, an audit, or training rather than a full program
Invesp sells conversion research, standalone audits, and CRO training as discrete services, including building up your internal team's skills. Convertibles runs full programs only and does not offer training engagements.
Testing Methodology Comparison
Invesp's SHIP Methodology runs from heuristic and usability review through customer journey mapping, qualitative and quantitative analysis, competitive analysis, hypothesis creation, testing, and post-test analysis. It is a research-first consulting process refined over 18 years, and the 36,000-test volume claim suggests heavy testing throughput across a large client base.
Convertibles defaults to multi-variation tests (control plus 2 to 4 variations) so each test answers more than one question, and runs them through Intelligems with every published result reaching 95% statistical significance before a winner ships to all traffic. The difference is posture: Invesp leads with research depth across many platforms and business models; Convertibles leads with shipping velocity on one platform.
Neither posture is wrong. A SaaS company with an internal dev team gets more from Invesp's research engine. A Shopify Plus brand without spare dev capacity gets more from a team that builds what it recommends.
Proof and Track Record
Convertibles
36 published case studies, each an individual test with the result, significance level, and revenue impact stated, totaling $2.3M+/month in aggregate measured lift. Public client endorsements from Jones Road Beauty, Performance Golf, and Gymreapers. Proof is test-level and named.
Invesp
Client roster includes eBay, 3M, O'Reilly, and the Special Olympics, with published case studies and testimonials from brands like ZGallerie, Barkbox, Catalina Crunch, and Decked. Headline claims are volume-based: 900+ clients, 36,000+ tests, programs that "pay for themselves within 90 days." Proof is scale-level and enterprise-weighted.
The Bigger Picture
Invesp helped define this industry. The agency was educating executives on the difference between SEO and CRO back when that needed explaining, and its founders literally wrote a book on conversion optimization. Choosing between Convertibles and Invesp is really choosing between two eras of CRO agency: the broad consultancy that works across every platform and business model, and the narrow specialist that picked one platform and bundled everything a DTC brand needs around it.
If you are a $2M+ Shopify Plus brand, the narrow specialist exists for you. If you are anyone else, the broad consultancy is the safer call.
Frequently Asked Questions
Is Convertibles the same kind of agency as Invesp?
Only partially. Both run conversion rate optimization programs, but Invesp is a platform-agnostic consultancy serving ecommerce, SaaS, and lead generation from startup to enterprise, while Convertibles is a Shopify Plus specialist serving $2M+ DTC brands with an execution-led program that includes dev and paid media.
Does Invesp only work with ecommerce brands?
No. Invesp has dedicated service lines for ecommerce, SaaS, and lead-generation businesses, plus a startup program. Ecommerce has been its largest segment since 2006, but it is not Shopify-specific or DTC-specific.
Does Invesp or Convertibles run paid media?
Convertibles runs Google and YouTube Ads as part of its core program. Invesp's public service pages list fully-managed CRO, research, audits, landing page optimization, analytics, and training, but not paid media management.
Who is better for Shopify Plus brands specifically?
For Shopify Plus DTC brands that want one team handling testing, dev, speed, and paid media, Convertibles is the more direct fit. For brands that want a research-led consultancy with two decades of cross-industry pattern recognition, or that plan to move off Shopify, Invesp fits well.
What is the pricing comparison between Convertibles and Invesp?
Neither agency publishes pricing. Invesp publicly states its core program is ideal for businesses with 1,000+ conversions per month. Convertibles uses a flexible engagement model scoped per client and works with $2M+ DTC Shopify Plus brands. Compare on what is included rather than a headline number.
How does each agency prove results?
Convertibles publishes 36 individual case studies, each reaching 95% statistical significance and shipped to 100% of traffic, totaling $2.3M+/month in aggregate measured lift. Invesp leads with scale: 900+ clients, 36,000+ A/B tests since 2006, and enterprise names like eBay, 3M, and O'Reilly. Convertibles' proof is test-level and named; Invesp's is volume-level and enterprise-weighted.
Does Convertibles offer CRO training like Invesp?
No. Invesp offers conversion optimization training as a standalone service for internal teams. Convertibles only runs full CRO programs where its own team does the research, development, and testing.
Ready to Decide?
If you are a $2M+ DTC brand on Shopify Plus, book a strategy call and we will walk you through what a Convertibles program would look like on your store, including which tests we would run first and why.
Weighing other agencies too? See our Convertibles vs SplitBase comparison for the research-led DTC peer, or our Convertibles vs DTC Pages comparison for the landing-page and redesign-led peer.