emerging · 2.1

A/B Testing

Score 22.4 / 100 36 providers 11 APIs Search apis.io →
Variants seen in the corpus: A/B TestingAB Testing

Providers using this tag (36)

Ranked by API Evangelist rating — Exemplar and Strong are expanded by default.

Exemplar 3 Complete, well-documented, and agent-ready
OptimizelyContent ManagementCustomer DataE-Commerce37 APIs72.5Zoho CampaignsEmail MarketingCampaignsMailing ListsSubscribers2 APIs68.7MatomoAnalyticsWeb AnalyticsOpen-SourcePrivacy61 APIs66.6
Strong 4 Solid coverage with minor gaps
UnbounceLanding PagesConversion Rate OptimizationMarketing1 API65.6Heroic LabsGame BackendMultiplayerReal-TimeWebSocket4 APIs64.9IntelligemsCompanyE-CommercePricing1 API59.6AmplitudeAnalyticsExperimentationFeature Flags10 APIs58.0
Developing 13 Usable, with meaningful gaps to close
LeadpagesCompanyLanding PagesMarketingConversion Optimization3 APIs53.6AB TastyAggregationExperimentationFeature FlagsPersonalization1 API51.7LeanplumMobile MarketingCustomer EngagementPush NotificationsMessaging2 APIs51.0PostHogAnalyticsFeature FlagsOpen-Source1 API50.8UniformCompanyDigital Experience PlatformContent ManagementPersonalization1 API50.4MonetateCompanyPersonalizationExperience Optimization6 APIs50.2RevnuCompanyGrowth AutomationMarketingArtificial Intelligence2 APIs48.5Builder.ioHeadless CMSVisual DevelopmentContent Delivery6 APIs48.4HarnessDevOpsGitOpsInternal Developer PortalLifecycle17 APIs47.5NinetailedPersonalizationExperimentationAudience Segmentation1 API43.1InstapageLanding PagesConversion OptimizationMarketing11 APIs42.7UnleashFeature FlagsFeature ManagementProgressive Delivery2 APIs40.9HypertuneFeature FlagsExperimentationAnalytics1 API39.7
Thin 11 Limited public surface area
SeldonMLOpsMachine-LearningModel ServingInference3 APIs38.5FibrCompanyConversion Rate OptimizationPersonalizationLanding Pages34.5ApptimizeCompanyFeature FlagsFeature Management1 API33.0GamebeastCompanyAnalyticsGamingGame Development1 API29.7GrowthBookFeature FlagsExperimentationOpen-SourceAB Testing1 API29.6PackdigitalCompanyContent ManagementHeadless CommerceShopify1 API29.3ConvertExperimentationAB TestingConversion OptimizationPersonalization1 API29.2EppoExperimentationFeature FlagsAB TestingAnalytics1 API27.6KameleoonExperimentationAB TestingPersonalizationFeature Flags1 API27.3VWOExperimentationAB TestingPersonalizationConversion Optimization1 API27.2EvolvExperimentationOptimizationPersonalization1 API26.7
Emerging 3 Early or largely undocumented
Dynamic YieldCompanyCloudPersonalizationExperience Optimization1 API25.9Google OptimizeAnalyticsDeprecatedExperimentation1 API20.4Yieldify *CompanyEnterprisePersonalizationConversion Rate Optimization14.1
Minimal 2 Almost no public developer surface
IntellimizeCompanyAi MlWebsite OptimizationPersonalization5.0StoremavenCompanyApp Store OptimizationASOMobile Marketing5.0

APIs with this tag (7)

Ranked by the provider's API Evangelist rating — the Kin Score is scored per provider, not per API, so every API of a provider shares its band. How the rating works →

Exemplar 1 Complete, well-documented, and agent-ready
Zoho Campaigns APIREST API for managing email campaigns, mailing lists, subscribers, templates, and analytics in Zoho Campaig...68.7
Strong 1 Solid coverage with minor gaps
Satori APIThe Satori API is Heroic Labs' LiveOps platform API enabling game developers to manage live operations incl...64.9
Developing 3 Usable, with meaningful gaps to close
PostHog Experiments APIThe PostHog Experiments API provides programmatic management of A/B tests and experiments. It supports crea...50.8PostHog Feature Flags APIThe PostHog Feature Flags API enables developers to create, manage, and evaluate feature flags programmatic...50.8Harness Feature Management and Experimentation APIAPIs to create and manage feature flags, targets, target groups, and tags for feature release management, p...47.5
Thin 1 Limited public surface area
Convert Experiences REST API v2Convert Experiences REST API v2 manages accounts, projects, experiments, goals, audiences, locations, repor...29.2
Emerging 1 Early or largely undocumented
Google Optimize API (Sunset)API for managing Google Optimize experiments, variants, and accessing optimization data. Sunset on Septembe...20.4

Score breakdown

Frequency
45.1
log-scaled weighted occurrences
Breadth
1.0
spread across providers
Quality lift
50.5
mean composite of providers using it
Cohesion
5.0
strength of nearest seed neighbor

Related tags

Experimentation 18 co-occurrences Feature Flags 14 co-occurrences Experiments 12 co-occurrences Conversion Rate Optimization 6 co-occurrences Conversion Optimization 5 co-occurrences Personalization 17 co-occurrences Content Management 7 co-occurrences Environments 5 co-occurrences

Where this tag comes from

Provider tag33
Api tag11

Cohort brief

Auto-generated

The 36 providers in the APIs.io catalog tagged A/B Testing, scored on the Kin Score. Every figure below is computed from the catalog — nothing here is written.

Providers
36
all scored
Mean Kin Score
41.5
+20.8 vs catalog 20.7
Mean Agent Readiness
24.4
+14.7 vs catalog 9.7
Spread
5–75.1
median 42.3 · σ 17.8
How the 36 split by band
Exemplar 5Strong 3Developing 11Thin 12Emerging 3Minimal 2
Facet averages, against the whole catalog
FacetThis cohortCatalogDifferenceScored
Developer Ergonomics 44.9 17.9 +27 36
Access Clarity 46.6 22.3 +24.3 36
Contract Quality 39.7 17.5 +22.2 36
Operational Transparency 30.3 11.3 +19 36
Discoverability 72.3 60.4 +11.9 36
Contract Governance 16.5 6.4 +10.1 36

A facet is averaged over the members that carry it, not over the whole cohort — the “Scored” column is that count. Averaging an absent facet as zero would score our own coverage gaps as the providers’ posture.

What this cohort publishes
ArtifactThis cohortCatalogDifference
MCP server (any) 39% 16% +23
MCP server (first-party) 25% 7% +18
Agent Skills 0% 0% 0
OAuth scopes 22% 9% +13
Security 97% 88% +9
Arazzo workflows 3% 2% +1
Governance rules 31% 13% +18

mcp_pct counts any mcp/ artifact including ones API Evangelist derived from the provider OpenAPI; mcp_first_party_pct counts only servers the provider publishes. Prefer the latter.

Top by Kin Score
  1. 1 Optimizely 75.1
  2. 2 Heroic Labs 70.4
  3. 3 Zoho Campaigns 69.8
  4. 4 Unbounce 68.7
  5. 5 Matomo 67.3
  6. 6 Intelligems 62.8
  7. 7 Amplitude 57.1
  8. 8 Leadpages 54.7
  9. 9 Leanplum 53.2
  10. 10 Monetate 52.7
Top by Agent Readiness
  1. 1 Unbounce 59.6
  2. 2 Intelligems 52.6
  3. 3 Monetate 52
  4. 4 Leadpages 50.6
  5. 5 Optimizely 39.4
  6. 6 Matomo 37.8
  7. 7 Zoho Campaigns 35.6
  8. 8 Builder.io 35.4
  9. 9 PostHog 33.5
  10. 10 Amplitude 32.9
All 36 members of this roster resolve to a scored provider in the catalog.Generated from the catalog build of 25 August 2026, across 26891 providers, using the same computation served by the APIs.io cohort API. Briefs are published for rosters of 5 or more scored providers; below that a distribution is not meaningful.

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Tools for tags

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  • find_tagsBrowse and filter every tag in the catalog.
  • get_cohortThis tag as a scored cohort — every provider carrying it, with scores.
  • cohort_statsPRO — the distribution across this tag: mean, median, band split, adoption rates.
  • cohort_rankingsPRO — the leaderboard, on composite AND agent-readiness axes.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
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