Convertibles vs Speero: CRO Agency Comparison (2026)
Convertibles and Speero both run experimentation programs, but they solve different problems. Speero, founded in 2011 as CXL by Peep Laja and Viljo Vabrit, is a growth experimentation consultancy that builds and matures testing programs for product and marketing teams, mostly at medium to large enterprises. Convertibles is a Shopify Plus specialist that runs the testing itself for $2M+ DTC brands, with dev, speed, landing pages, and paid media under one team.
This page lays out where each 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.
- Speero: Founded 2011 as CXL, renamed Speero in 2020. Founders Peep Laja and Viljo Vabrit. Offices in the US, UK, and Australia, working with medium to large enterprises globally. Services span full-service experimentation programs, program maturity audits, customer experience optimization, user research, analytics audits, design sprints, workshops, and even hiring support, organized around its XOS (experimentation operating system) framework.
- Pick Convertibles if: you are a DTC brand on Shopify Plus and want an agency that does the testing for you, ships the winners with its own dev team, and runs paid media in the same loop.
- Pick Speero if: you want to build experimentation capability inside your own team, you run a SaaS or B2B product, or you need program-level work like maturity audits, analytics infrastructure, and research operations.
Side-by-Side Comparison
| Dimension | Convertibles | Speero |
|---|---|---|
| Platform focus | Shopify Plus specialist | Platform-agnostic (ecommerce, SaaS, B2B product teams) |
| Founded | 2023 (founding team: 10+ years prior Shopify dev experience plus 8-figure brand exit) | 2011 as CXL, renamed Speero in 2020 |
| Core model | Done-for-you: the agency researches, builds, tests, and ships | Program-building: helps your team test better (plus full-service retainers) |
| Service scope | CRO, landing pages, speed, dev, Google plus YouTube Ads | Experimentation programs, maturity audits, CXO, user research, analytics audits, design, workshops, hiring support |
| Paid media included | Yes (Google plus YouTube Ads) | Not listed on public service pages |
| Client profile | $2M+ DTC Shopify Plus brands | Medium to large enterprises globally, strong SaaS and B2B presence |
| Methodology | Multi-variation testing (control plus 2 to 4 variations), shipped by an in-house dev team | XOS framework: research, data and engineering, A/B testing, and operating systems for experimentation |
| Engagement model | Flexible program, scoped per client | Retainer programs, support projects, special projects, and workshops |
| Offices | Brooklyn, New York and Sofia, Bulgaria (US plus EU hours) | US, UK, and Australia |
When Convertibles Is the Better Fit
You want the agency to run the tests, not coach your team
Speero's center of gravity is making your team better at experimentation: maturity audits, operating systems, workshops, hiring support. Convertibles is the opposite model: its own strategist picks the tests, its own developers build them, and winners ship to 100% of traffic without touching your roadmap. If you do not have a team to mature, the coaching model has nothing to coach.
You are a DTC brand on Shopify Plus
Convertibles tests against Shopify checkout behavior, theme architecture, and app stack constraints every day, and pairs testing with Shopify-specific speed and dev work. Speero's enterprise and SaaS breadth is real, but it is not a Shopify shop.
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. Speero's public service pages do not list paid media management.
When Speero Is the Better Fit
You are building an internal experimentation team
If the goal is your own product and marketing teams running a mature testing program, Speero literally sells that outcome: program maturity audits, XOS blueprints, workshops, advisory clinics, and hiring support. No execution agency, Convertibles included, replaces that.
You run a SaaS or B2B product
Speero offers SaaS pricing page analysis, ICP research, win/loss analysis, and B2B message testing. Convertibles does not serve SaaS or B2B buyers at all.
You need the research and data layer fixed first
Speero's position is that most analytics setups are critically flawed, and it sells analytics audits and data warehousing for experimentation as standalone projects. If you cannot trust your data yet, that work precedes any testing program.
Methodology Comparison
Speero's XOS treats experimentation as an operating system: research feeds a prioritized backlog, data infrastructure makes results trustworthy, and process makes the whole thing repeatable inside your organization. It is the most systematized take on experimentation-as-capability in the industry, built on the CXL heritage of Peep Laja's conversion research.
Convertibles compresses that loop into one external team on one platform: research, multi-variation tests (control plus 2 to 4 variations) through Intelligems, every published result at 95% statistical significance, winners shipped by the same developers who built them. Less emphasis on transforming your organization, more on revenue shipped this quarter.
The honest framing: Speero builds engines, Convertibles drives the car for you.
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.
Speero
Results delivered for hundreds of brands worldwide since 2011, an enterprise client base across three continents, and the CXL pedigree: its founder built one of the most-read conversion optimization education platforms in the industry. Speero also publishes original research like its Experimentation Maturity Program Reports and benchmark studies. Proof is institutional and thought-leadership-weighted.
The Bigger Picture
Speero and Convertibles rarely compete for the same buyer, which makes this an easy comparison to call honestly. If you are an enterprise or SaaS company that wants experimentation as an internal capability, Speero is one of the strongest options anywhere. If you are a $2M+ DTC brand on Shopify Plus that wants tests built, shipped, and paid for out of measured revenue lift, that is the exact buyer Convertibles was built for.
The only real overlap is a mid-size DTC brand choosing between building a testing team and hiring one. Build for the long term with Speero; rent velocity now with Convertibles.
Frequently Asked Questions
Is Convertibles the same kind of agency as Speero?
Not quite. Both run experimentation programs, but Speero is a platform-agnostic consultancy that builds testing capability inside enterprise product and marketing teams, while Convertibles is a Shopify Plus specialist that runs the full testing program itself for $2M+ DTC brands, including dev and paid media.
Is Speero the same company as CXL?
Speero was founded in 2011 as CXL by Peep Laja and Viljo Vabrit and renamed to Speero in 2020. The CXL education platform and the Speero agency share origins; the agency rebranded to focus on experimentation programs driven by data, research, and customer experience.
Does Speero or Convertibles run paid media?
Convertibles runs Google and YouTube Ads as part of its core program. Speero's public service pages cover experimentation, research, analytics, design, and workshops, but do not list 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 enterprises building an internal experimentation function, or SaaS and B2B companies, Speero fits well.
What does Speero's XOS mean?
XOS is Speero's experimentation operating system: a framework combining UX research, data and engineering, A/B testing, and process design so organizations can run experimentation as a repeatable internal capability rather than ad-hoc tests.
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. Speero leads with institutional proof: hundreds of brands since 2011, enterprise clients across three continents, and original industry research. Convertibles' proof is test-level and named; Speero's is program-level and research-weighted.
Does Convertibles help build internal testing teams like Speero does?
No. Convertibles runs the program itself with its own strategist, developers, designers, and QA. It does not offer maturity audits, workshops, or hiring support. If internal capability is the goal, that is Speero's territory.
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 Invesp comparison for the long-established CRO consultancy, or our Convertibles vs SplitBase comparison for the research-led DTC peer.