# Plerdy — Conversion Optimization

Plerdy by Plerdy holds a panel rating of 1.5/5 from 6 AI judges (category median 2/5), as of 2026-10-21. Provenance: provenance unknown; sovereignty: not determined.

- Vendor: Plerdy (https://plerdy.com)
- Category: [Conversion Optimization](https://whats-best.ai/software/conversion-optimization.md)
- Provenance (editorial classification): provenance unknown
- Canonical page: https://whats-best.ai/software/conversion-optimization/plerdy
- Alternatives: https://whats-best.ai/software/conversion-optimization/plerdy/alternatives ([markdown](https://whats-best.ai/software/conversion-optimization/plerdy/alternatives.md))
- Data as of: 2026-10-21 · evaluated 2026-10-21 · oldest source captured 2026-10-20

**AI-generated.** Every score, rationale and verdict here is written by a panel of AI judges from public evidence — an analysis, not a hands-on test. Every fact quotes the vendor page it was read from. No score can be bought. How scores are made: https://whats-best.ai/methodology

## At a glance

- Vendor: Plerdy
- Headquarters: Not stated on the vendor’s pages as of 20 Oct 2026
- Data hosting: Default not stated; pages mention Germany [S2]
- Free plan: Not stated on the vendor’s pages as of 20 Oct 2026

## The panel's verdict

Plerdy, a conversion-optimisation platform, comes out of this bench strongest on statistics and weakest on performance. Statistical rigour scores cluster at 4 to 5: the free significance and sample-size calculators name frequentist and Bayesian framings and publish their formula and finite-population correction, though we found no public information on peeking protection or sample ratio mismatch detection. Performance impact scores sit at 1 — the only claim captured is "Zero Server Load" beside a required tracking code, with no public information on script size, loading behaviour or Core Web Vitals impact. Experimentation scope scores run 2 to 3, a client-side tool with HTML/CSS variants, targeting by device, country and traffic source, and no public evidence of server-side SDKs, multivariate or split-URL tests. Consent and tracking splits 2 to 3: the no-cookies statement and local-storage list earn credit, while no public information exists on storage lifetimes or pre-consent script behaviour. Sovereignty sits at 3 with the data protection officer at 4 — Germany-hosted Hetzner infrastructure against an unstated contracting-entity jurisdiction — and no prices are public beyond a free 14-day trial.

**Speaks for it:**
- Free statistical significance and sample-size calculators publish their formula, finite-population correction and stated assumptions such as simple random sampling and independent observations.
- Client-side tests offer audience targeting by device type, country and traffic source with per-test end dates and running, concluded or draft statuses.
- The privacy policy states no cookies are used, lists local-storage contents such as user sessions and traffic channels, and says that data is not shared with third parties.
- The security policy states the server sits in Germany in a Hetzner data centre certified to ISO 27001.
- Documented integrations cover Google Analytics 4 event goals, Google Search Console, a Shopify App Store listing and read-only AI access through Claude and ChatGPT.

**Held against it:**
- Performance impact scores sit at 1, and the only claim captured is 'Zero Server Load' with no public information on script size, loading behaviour, flicker handling or Core Web Vitals impact.
- We found no public information on server-side SDKs, feature flags, multivariate, split-URL or multi-page tests, holdouts or personalisation.
- We found no public information on what the tracking script does before a visitor consents, on consent management platform integrations, on storage lifetimes or on IP anonymisation.
- We found no public information on a documented API, result export or visitor-level data, so a reported lift can be checked only in the vendor's dashboard and GA4.
- We found no public information on the contracting entity's jurisdiction or a subprocessor list, transfers are described only by category, and Cloudflare supplies the SSL certificate.

**Best for:**
- You need no-code client-side A/B tests that marketers can build from HTML and CSS tweaks without a developer.
- You want test-planning statistics spelled out publicly — sample-size formulas, significance conventions, power — so you can defend the numbers internally.
- Your stack is already Google Analytics 4 and Shopify and documented event-goal wiring and an app-store listing matter to you.
- You require hosting that the vendor itself states is in Germany, on Hetzner infrastructure certified to ISO 27001, as a baseline.

**Avoid if:**
- Your programme needs server-side or SDK delivery, feature flags, or multivariate and split-URL tests; experimentation scope scores sit at 2 to 3 for a client-side tool.
- Your data protection officer must sign off on pre-consent script behaviour, storage lifetimes and a subprocessor list before deployment; consent and tracking scores spread 2 to 3.

## Scores by judge and criterion

Scores out of 5, each judge scoring independently against the published rubric (v1). "n/r" = not rated: the vendor publishes no price.

| Criterion | The Growth Lead | The E-Commerce Manager | The Product Engineer | The CRO Consultant | The Data Protection Officer | The Skeptic |
| --- | --- | --- | --- | --- | --- | --- |
| Experiment types & delivery | 1.5/5 | 1.5/5 | 1.5/5 | 1/5 | 1.5/5 | 1.5/5 |
| Statistical method & guardrails | 2.5/5 | 2.5/5 | 2/5 | 2.5/5 | 2.5/5 | 2.5/5 |
| Consent & visitor tracking | 1.5/5 | 1.5/5 | 1/5 | 1/5 | 1/5 | 1.5/5 |
| Snippet performance & flicker | 0.5/5 | 0.5/5 | 0.5/5 | 0.5/5 | 0.5/5 | 0.5/5 |
| Analytics, data export & integrations | 1.5/5 | 1/5 | 1.5/5 | 1.5/5 | 1/5 | 1.5/5 |
| European sovereignty | 1.5/5 | 1.5/5 | 1.5/5 | 1.5/5 | 2/5 | 1.5/5 |
| Pricing transparency | n/r | n/r | n/r | n/r | n/r | n/r |
| **Weighted verdict** | **1.5/5** | **1.5/5** | **1.5/5** | **1.5/5** | **1.5/5** | **1.5/5** |

### The judges

- **The Growth Lead** (v1.0): Runs the testing programme for a German marketing team and reports uplift to the board. Wants a visual editor the team can use without a developer, targeting that goes beyond the URL, and results she can defend when finance asks where the promised revenue went.
- **The E-Commerce Manager** (v1.0): Owns a shop where a tenth of a second of load time shows up in the conversion rate. Wants personalisation that can be tested against a control, a snippet that does not flicker the product page, and a traffic-based price that does not jump a tier every December.
- **The Product Engineer** (v1.0): Ships experiments behind feature flags and would rather not ship a third-party script at all. Wants server-side SDKs for the stack in use, edge delivery, metrics computed in the warehouse the team already trusts, and an API good enough to build internal tooling on.
- **The CRO Consultant** (v1.0): Sets up testing programmes for several clients and has to recommend a platform each can afford and defend. Reads for multi-project management, clean analytics integration, a consent setup a client's DPO will sign off, and a traffic metric she can estimate before the contract.
- **The Data Protection Officer** (v1.0): Has to answer whether the test script may run before the consent banner is answered, and usually finds the vendor has not said. Wants the storage keys listed, a documented consent-pending mode, visitor data processed in the EU, and a published subprocessor list that includes the CDN.
- **The Skeptic** (v1.0): A statistician who has watched too many "winners" regress to zero. Reads for the method by name, what stops a team from peeking, sample ratio mismatch checks and multiple-comparison corrections — and treats a "probability to beat" without documented assumptions as marketing.

## European sovereignty — proven facts

Built only from facts on the vendor's own pages; a dimension we could not prove is left open, never scored as zero. Headline: not determined.

| Dimension | Finding | Points | Source |
|---|---|---|---|
| Legal entity | Not determined | — | — |
| Ownership | Not determined | — | — |
| Data residency | Not determined | — | — |
| Subprocessors | Not determined | — | — |

## Key facts

Each fact is the vendor's own statement, cited to the source page it was read from ([S*n*] → Sources).

**Compliance**
- Breach notification: yes [S2]
- Cookies used: no [S7]
- Data processing measures: pseudonymization · encryption · availability/fault tolerance · regular testing · 32 [S2]
- Data protection contact: hello@plerdy.com [S6]
- Employee access control: yes [S2]
- Encryption tls: 1.3 [S2]
- EU response time: EU/EEA · 21 [S7]
- GDPR: yes · Do Not Track · Privacy Policy · Security Policy · Terms of Service [S1]
- GDPR: yes · yes [S3]
- GDPR: yes [S4]
- GDPR frameworks: GDPR (EU 2016/679) · California Consumer Privacy Act 2018 · Law of Ukraine On Personal Data Protection · LGPD 13709/2018 Brazil [S6]
- Internal documents: Privacy Policy and Terms of Use posted on website [S6]
- Payment data stored: no [S2]
- Publication date: June 29, 2022 [S2]
- Resident rights: access · erasure · rectification · data portability · objection [S6]
- Scope exclusions: yes [S2]
- Ssl certificate: Cloudflare [S2]
- Support rights contact: hello@plerdy.com · email [S6]
- US law: CCPA 2018 [S7]

**Data**
- Account deletion by user: yes [S7]
- Data transfer third parties: contractors, employees, legal/tax consultants, accounting, marketing, IT services [S7]
- Deletion right GDPR: yes [S7]
- Inactivity deletion: 6 [S7]
- Local storage: yes · no [S7]
- Minors: no [S7]
- Payment data: no [S7]
- Recording blocking: e-mail · bank card details · contact phone number [S7]
- Russia suspension notice: 14 [S7]
- Sensitive data: no [S7]
- Transfer on merger: transfer possible on acquisition, merger, financing, reorganization, joint venture, sale of assets, bankruptcy [S7]
- User data encrypted: yes · no [S7]
- Video recording: no [S7]
- Withdrawal processing stop: 10 [S7]

**Hosting**
- Server location: Germany · yes · Hetzner [S2]

**Integrations**
- Search console: Google Search Console integration [S1]
- Shopify: Listed on Shopify App Store [S1]
- Shopify app store: yes [S4]

**Legal**
- Brazil law: LGPD 13709/2018 [S7]
- Framework: GDPR (Regulation (EU) 2016/679) is the primary legislation referenced [S7]
- Policy last updated: 2023-05-14 [S7]
- Privacy contact email: hello@plerdy.com [S7]
- Russia law: Russian Federal Law № 152-FZ [S7]
- Ukraine law: Law of Ukraine On Personal Data Protection [S7]

**Pricing**
- Trial: 14 [S1]

**Product**
- Ab significance calculator: free A/B testing statistical significance calculator comparing variant B vs control A [S4]
- AI access conditions: yes · all paid plans · no [S1]
- AI mcp integration: read-only · yes · Claude · ChatGPT [S1]
- Alpha default: alpha 0.05 (5%) described as common threshold [S4]
- Calculator inputs: visitors for A and B · conversions for A and B · one-sided or two-sided test · confidence level 90/95/99% [S4]
- Calculator outputs: conversion rate per version · lift % · p-value · confidence · sometimes power [S4]
- Calculator purpose: Calculates recommended sample size from population size, confidence level, and margin of error [S5]
- Chrome extensions free: yes · SEO insights · heatmaps · UX tips [S4]
- Cms blend: yes [S3]
- Confidence levels: 90 · 95 · 99 [S4]
- Confidence range: 99 · 80 [S5]
- Consent mechanism: consent via pop-up form with checkbox [S7]
- Data accuracy: 99 [S3]
- Ddos protection: all attack types · secure IP address · traffic filtering · IPS · server protection [S2]
- Default proportion: 50 [S5]
- Device analysis: yes [S3]
- Device targeting: yes · device type · country · traffic source [S3]
- Engagement metrics: average session duration · average scroll % [S3]
- Example result: 99 · 34 · yes [S4]
- Finite population correction: yes [S5]
- Formula: Population-proportion formula with z-score [S5]
- Free statistical significance calculator: yes [S4]
- Free tool: yes [S3]
- Free tools: Free tools: UX & Usability Testing, free Chrome extensions for SEO [S1]
- G2 reviews: 300+ [S3]
- Ga4 integration: Button Clicks · Thank You page views · yes [S3]
- Google signup: yes [S3]
- Heatmap no personal data: no · yes [S6]
- Heatmap traffic sources: identify visitor location / EU origin · yes [S6]
- Html css variants: variant editing via HTML/CSS tweaks like colors, width, margins [S3]
- Inputs required: population size · confidence level · margin of error [S5]
- Invitation formula: Invitations needed = required sample / expected response rate, plus optional 10–20% buffer [S5]
- Last reviewed: 2026-08 [S5]
- Mcp: yes [S3]
- Method assumptions: population-proportion formula with finite population correction · yes · yes · yes [S5]
- Platform description: marketing research, sales optimization, user behavior analysis, conversion rate improvement [S7]
- Platform role: processor [S7]
- Population table: 80 · 169 · 218 · 278 · 357 · 370 · 383 · 385 · 95% confidence, ±5% margin, 50% proportion [S5]
- Rage click detection: Rage Click detection flagged instantly in reports, with alerts when Rage Clicks spike [S1]
- Ratings: 4.9/5 · 316 · 4.7/5 [S1]
- Ratings: 4.9 · 4.7 · 316+ [S3]
- Realtime reports: yes [S3]
- Reference table: 6765 · 9604 · 16588 · 1692 · 2401 · 4145 · 752 · 1068 · 1844 · 271 · 385 · 664 · 68 · 97 · 166 [S5]
- Related calculators: TikTok Money Calculator · CPM Calculator · ROMI Calculator · ROI Calculator · NPS calculator · CTR Calculator · CAC Calculator · A/B Testing Significance Calculator [S5]
- Result meaning: Result represents completed and usable observations, not invitations [S5]
- Rope mentioned: ROPE concept described as used by other platforms like VWO, not necessarily by this calculator [S4]
- Server load: 0 [S3]
- Session replay: Session replay video recordings [S1]
- Signup free: yes · no [S3]
- Statistical approaches: yes · yes [S4]
- Statistical power reported: yes [S4]
- Test statuses: running · concluded · draft [S3]
- Test types: yes · yes [S4]
- Tracking code: yes [S3]
- Traffic channel insights: yes [S3]
- Traffic UX dashboard: Dashboard connects traffic sources to UX issues, with landing page filtering and wasted ad budget identification [S1]
- Trial offer: yes [S5]
- Two factor auth: email code via SMTP · yes [S2]
- Video session tags: personal data recorded in video sessions; client can add tag attributes to include fields [S7]
- Z scores: 1.282 · 1.645 · 1.96 · 2.576 [S5]

## Questions

### Is Plerdy European?

Not determined: the vendor’s pages as captured do not say where Plerdy is based.

### Where does Plerdy store data?

The default storage location for customer data is not stated on the vendor’s pages as of 20 Oct 2026. The vendor’s pages mention Germany as hosting location, per [the vendor’s page captured 20 Oct 2026](https://whats-best.ai/evidence/9223).

### Does Plerdy have a free plan?

Not stated on the vendor’s pages as of 20 Oct 2026.

### What are the best alternatives to Plerdy?

As of 21 Oct 2026, the panel rates [GrowthBook (3.5/5)](https://whats-best.ai/software/conversion-optimization/growthbook), [Convert Experiences (3.5/5)](https://whats-best.ai/software/conversion-optimization/convert-experiences) and [Webtrends Optimize (3/5)](https://whats-best.ai/software/conversion-optimization/webtrends-optimize) highest among the other 31 Conversion Optimization products evaluated. Ratings that look equal are rounded to half stars; the order uses the unrounded rating, then the name. The highest-rated European alternative is [Webtrends Optimize](https://whats-best.ai/software/conversion-optimization/webtrends-optimize) (UK / wider Europe). Ratings are the AI panel’s opinion, formed from public evidence: [how scores are made](https://whats-best.ai/methodology#ordering). The full list, with European products first: [Plerdy alternatives](https://whats-best.ai/software/conversion-optimization/plerdy/alternatives).

## What this page leaves out

- 8 product facts could not be confirmed on the vendor’s page as captured and were left out of this page and of the panel’s material.
- 5 compliance facts could not be confirmed on the vendor’s page as captured and were left out of this page and of the panel’s material.
- 3 subprocessors facts could not be confirmed on the vendor’s page as captured and were left out of this page and of the panel’s material.
- 2 data facts could not be confirmed on the vendor’s page as captured and were left out of this page and of the panel’s material.
- 1 hosting fact could not be confirmed on the vendor’s page as captured and was left out of this page and of the panel’s material.
- 1 integrations fact could not be confirmed on the vendor’s page as captured and was left out of this page and of the panel’s material.
- 1 legal fact could not be confirmed on the vendor’s page as captured and was left out of this page and of the panel’s material.
- 1 sovereignty dimension could not be confirmed on the vendor’s own pages and is shown as unknown.

## Sources

- [S1] Vendor page: https://plerdy.com (checked 2026-10-20)
- [S2] Security / trust page — found from the homepage: https://www.plerdy.com/security-policy/ (checked 2026-10-20)
- [S3] Experiment types & delivery — found from sitemap: https://www.plerdy.com/ab-testing-tool/ (checked 2026-10-20)
- [S4] Experiment types & delivery — found from sitemap: https://www.plerdy.com/a-b-testing-significance-calculator/ (checked 2026-10-20)
- [S5] Statistical method & guardrails — found from sitemap: https://www.plerdy.com/sample-size-calculator/ (checked 2026-10-20)
- [S6] Consent & visitor tracking — found from sitemap: https://www.plerdy.com/gdpr-plerdy/ (checked 2026-10-20)
- [S7] Consent & visitor tracking — found from sitemap: https://www.plerdy.com/privacy-policy/ (checked 2026-10-20)

---

Cite as: whats-best.ai, "Plerdy — Conversion Optimization", AI panel analysis, as of 2026-10-21. https://whats-best.ai/software/conversion-optimization/plerdy

Corrections: https://whats-best.ai/correct/874?target=page