# Nosto — Conversion Optimization Nosto by Nosto Solutions Oy holds a panel rating of 1.5/5 from 6 AI judges (category median 2/5), as of 2026-10-15. Provenance: provenance unknown; sovereignty: not determined. - Vendor: Nosto Solutions Oy (https://www.nosto.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/nosto - Alternatives: https://whats-best.ai/software/conversion-optimization/nosto/alternatives ([markdown](https://whats-best.ai/software/conversion-optimization/nosto/alternatives.md)) - Data as of: 2026-10-21 · evaluated 2026-10-15 · oldest source captured 2026-10-13 **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: Nosto Solutions Oy - Headquarters: Not stated on the vendor’s pages as of 13 Oct 2026 - Data hosting: Not stated on the vendor’s pages as of 13 Oct 2026 - Free plan: Not stated on the vendor’s pages as of 13 Oct 2026 ## The panel's verdict Nosto, a commerce experience platform from Nosto Solutions Oy, scores strongest on performance impact, 4 to 5: the captured help pages document asynchronous, iframe-isolated loading of a custom script that is minimised and gzipped, CDN caching with a 24-hour cache lifetime, and ETag responses of about 204 bytes. Experimentation scope clusters at 3 to 4, covering A/B/n, split and multivariate testing of Nosto campaigns — the A/B engine is described as powered by Omniconvert — plus personalisation on past orders, browsing history and current-session behaviour; we found no public information on server-side SDKs, feature flags or holdouts. Statistical rigour sits at 3: a Bayesian label over proprietary internals, with no published sample-size, stopping or sample-ratio guidance. Sovereignty scores 2 to 3, the lowest of the product criteria: the record carries no sovereignty attributes, and we found no public information on hosting location, subprocessors or a data-processing agreement. Results leave the platform only as aggregated CSV; consent gating rests with the merchant. Judges' spread stayed within one point on every criterion, and no public pricing appears on any captured page. **Speaks for it:** - Asynchronous, iframe-isolated loading means a failed script load cannot block the host page's main content, from a custom script that is minimised and gzipped - Campaign testing covers A/B/n, split and multivariate testing, with personalisation on past orders, browsing history and current-session behaviour - Visitor opt-outs are documented in tiers, from blocking the script entirely to a session-tracking opt-out that keeps search and best sellers running on trend data - Google Analytics works without additional input, and Klaviyo segments import to build corresponding audiences, with integrations off by default under merchant control - Analytics tables for search, category merchandising and autocomplete export as CSV via an emailed download link **Held against it:** - Statistics are named Bayesian over proprietary internals, with no published sample-size guidance, stopping rules or sample-ratio mismatch detection - Testing is campaign-scoped and client-side; we found no public information on server-side SDKs, feature flags, holdouts or mutually exclusive experiments - Exports are aggregated CSV only, with no documented API, visitor-level export or warehouse delivery for re-checking a result in your own data - Consent gating falls to the merchant wrapping the script in a conditional, and we found no public information on cookie lifetimes or a consent-pending mode - We found no public information on hosting location for visitor data, subprocessors or a data-processing agreement, while the A/B engine is described as powered by a third party (Omniconvert) **Best for:** - You want to A/B, split or multivariate test on-site recommendation, search and merchandising campaigns, with personalisation on browsing history and live session behaviour - Your storefront pages cannot tolerate a script that blocks loading and you want documented asynchronous, iframe-isolated delivery - You already run Google Analytics and Klaviyo and want segments and UTM-tagged traffic flowing with minimal setup **Avoid if:** - You need to test your own pages or app surfaces server-side, with feature flags, holdouts or mutually exclusive experiment groups - You must re-check winners in your own data through an API or warehouse rather than aggregated CSV exports - Your procurement requires published hosting locations, a subprocessor list or a data-processing agreement before signing - You need documented sample-size and stopping guidance to defend a result internally ## 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 | 2/5 | 2/5 | 1.5/5 | 2/5 | 2/5 | 2/5 | | Statistical method & guardrails | 1.5/5 | 1.5/5 | 1.5/5 | 1.5/5 | 1.5/5 | 1.5/5 | | Consent & visitor tracking | 2/5 | 1.5/5 | 2/5 | 2/5 | 1.5/5 | 2/5 | | Snippet performance & flicker | 2/5 | 2/5 | 2/5 | 2.5/5 | 2/5 | 2/5 | | Analytics, data export & integrations | 1.5/5 | 2/5 | 1.5/5 | 2/5 | 2/5 | 1.5/5 | | European sovereignty | 1/5 | 1.5/5 | 1.5/5 | 1/5 | 1.5/5 | 1.5/5 | | Pricing transparency | n/r | n/r | n/r | n/r | n/r | n/r | | **Weighted verdict** | **2/5** | **2/5** | **1.5/5** | **2/5** | **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 No sovereignty finding yet. ## Key facts Each fact is the vendor's own statement, cited to the source page it was read from ([S*n*] → Sources). **Compliance** - Certified: yes [S1] - Data roles: data processor · data controller · data subjects [S5] - First party cookies: first-party · yes [S5] - Itp safari first party expiry: cross-domain trackers restricted to 24-hour lifespan · 7 [S5] - Legal basis references: GDPR consent and COPPA are cited as reasons to disable Nosto per individual [S6] **Data** - Deletion and takeout documented: delete personal data · retrieve personal data (data takeout request) [S5] **Integrations** - Default off: off and inactive · yes [S5] - Google analytics support: yes · no [S9] - Klaviyo data transfer: segments · emails · names · Klaviyo [S5] - Platform integrations: yes [S1] **Pricing** - Page available: no · yes [S1] **Product** - Ab testing powered by: A/B testing & Optimization powered by Omniconvert [S2] - Analytics sections: Search · Category Merchandising · Autocomplete [S10] - Async loading: Nosto uses asynchronous script loading so a failed script load cannot block the host site's main content [S7] - Autocomplete keywords table: Clicks · Orders · CR % · Share % · yes [S10] - Autocomplete metrics: Product clicks · Keyword clicks · Usage [S10] - Bot traffic facebook filter: ISP Organization · no · facebook inc. [S9] - Capabilities: yes [S1] - Categories table: Views · Clicks · CTR % · Orders · Share % · CR % · Total sales · yes [S10] - Category metrics: Total Category Views · Orders · Sales · CTR % · CR % · Product clicks [S10] - Cdn cache lifetime: Most resources delivered via CDN have a 24 hour cache lifetime [S8] - Current session personalization: yes [S5] - Data export: csv · download link emailed · yes [S10] - Device type breakdown: Phone · Desktop · Tablet · Other [S10] - Etag mechanism: yes [S8] - Etag response size: 204 [S8] - Experience AI engine: experience.AI core engine [S1] - Facebook ad view discrepancy: Nosto admin panel under Facebook ad settings [S9] - Facebook ads utm tagged: Campaigns · yes [S9] - Huginn scope: search · merchandising · personalization · A/B testing [S1] - Hybrid vector metrics: yes · yes [S10] - Iframe loading: yes [S7] - Js cache lifetime: autocomplete.js · main.js · 1 [S8] - Minimised script: Script is custom built, minimised and gzipped [S7] - Multi term order attribution: A single order can be attributed to multiple search terms within the same session [S10] - Onsite recommendation parameter: nosto= [S9] - Optout conditional script: Visitors can be opted out by conditionally loading the Nosto script based on consent [S6] - Optout disables all features: yes [S6] - Optout full loading block: prevent loading of Nosto javascript · none of Nosto’s features are available [S5] - Optout session tracking: opt-out of session tracking · session tracking features e.g. personal browsing history unavailable [S5] - Optout still works: yes · yes · no [S5] - Orders attribution: Statistics table includes Search and Autocomplete orders; All search terms table attributes orders to Search only [S10] - Organic nonorganic: organic · non-organic · yes [S10] - Platform type: Agentic commerce experience platform with AI personalization [S1] - Recommend script placement: Nosto advises placing the script early in the page, not at the end of the body, so recommendations appear sooner [S7] - Recommended monthly routine: Monthly routine recommended to review analytics and improve search [S10] - Retrospective reporting: yes [S9] - Search metrics: Total Searches counts search impressions from submissions, filters, pagination and sorting; plus Orders, Sales, CTR %, CR %, Product clicks [S10] - Search terms query details: yes [S10] - Search terms table: Keyword · Hybrid · Vector · Result type · Searches · Clicks · CTR % · Orders · Share % · CR % · Total sales [S10] - Session inactivity timeout: 30 [S9] - Statistical approach: Campaign Testing · yes · Bayesian [S4] - Testing types: A/B/n, split, and multivariate testing [S3] - Third party cookies unaffected: no · confined to the e-commerce site it operates on [S5] - Triggered email utm tags: email · nosto · Clicked element, name of the email and reference · Nosto email type [S9] - Visits metric definition: no [S9] **Support** - Analytics compatibility contact: yes [S9] - Author date: 2023-05-19 · Rihad Suljic [S8] - Hosted on intercom: Intercom [S6] - Intercom platform: Intercom [S7] - Platform: Intercom [S4] ## Questions ### Is Nosto European? Not determined: the vendor’s pages as captured do not say where Nosto is based. ### Where does Nosto store data? Not stated on the vendor’s pages as of 13 Oct 2026. ### Does Nosto have a free plan? Not stated on the vendor’s pages as of 13 Oct 2026. ### What are the best alternatives to Nosto? 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: [Nosto alternatives](https://whats-best.ai/software/conversion-optimization/nosto/alternatives). ## What this page leaves out - 33 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. - 4 support 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 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. - 6 of the readings below were written against an earlier fact sheet — a fact has been corrected, added or pulled since. Until the panel next runs on this product you are reading the older judgement. ## Sources - [S1] Vendor page: https://www.nosto.com (checked 2026-10-13) - [S2] Experiment types & delivery — found from sitemap: https://www.nosto.com/commerce-experience-platform/a-b-testing-and-optimization/ (checked 2026-10-13) - [S3] Experiment types & delivery — found from sitemap: https://www.nosto.com/commerce-experience-platform/dynamic-targeting/campaign-testing/ (checked 2026-10-13) - [S4] Statistical method & guardrails — found from sitemap: https://help.nosto.com/en/articles/3190962-do-you-use-a-frequentist-or-a-bayesian-statistical-approach (checked 2026-10-13) - [S5] Consent & visitor tracking — found from sitemap: https://help.nosto.com/en/articles/6018890-nosto-and-cookies (checked 2026-10-13) - [S6] Consent & visitor tracking — found from sitemap: https://help.nosto.com/en/articles/1811603-how-can-website-visitors-opt-out-of-cookies-and-data-collected-and-processed-by-nosto (checked 2026-10-13) - [S7] Snippet performance & flicker — found from sitemap: https://help.nosto.com/en/articles/1616950-asynchronous-script-loading (checked 2026-10-13) - [S8] Snippet performance & flicker — found from sitemap: https://help.nosto.com/en/articles/7923923-which-cache-settings-are-used-for-the-cdn-servers-to-optimise-performance (checked 2026-10-13) - [S9] Analytics, data export & integrations — found from sitemap: https://help.nosto.com/en/articles/580613-google-analytics-and-nosto (checked 2026-10-13) - [S10] Analytics, data export & integrations — found from sitemap: https://help.nosto.com/en/articles/9460380-getting-started-with-analytics (checked 2026-10-13) --- Cite as: whats-best.ai, "Nosto — Conversion Optimization", AI panel analysis, as of 2026-10-21. https://whats-best.ai/software/conversion-optimization/nosto Corrections: https://whats-best.ai/correct/687?target=page