Everstring

EverString was a B2B predictive marketing and sales intelligence platform that used data science, machine learning, and a proprietary business data cloud to help go-to-market teams identify their best-fit accounts. Its capabilities included predictive lead and account scoring, account-based marketing segmentation, firmographic enrichment, similar-company discovery, ML-generated keywords, and industry classification, exposed to developers through an Enrichment API on developer.everstring.com secured with access-token authentication. Founded in 2012 and backed by investors including Lightspeed Venture Partners, EverString was acquired by ZoomInfo in November 2019 and its data and predictive capabilities were folded into the ZoomInfo platform; the everstring.com website now redirects to ZoomInfo Operations and the standalone developer portal has been largely decommissioned. This profile documents the historical API surface and current public footprint.

Everstring publishes 1 API on the APIs.io network. Tagged areas include Company, Predictive Marketing, Sales Intelligence, Data Enrichment, and Firmographics.

🌐 Visit website 📡 Source on GitHub

10.5/100 minimal Agent 0/100 human only Full breakdown ↓
scored 2026-07-20 · rubric v0.4

1 APIs 0 Features

CompanyPredictive MarketingSales IntelligenceData EnrichmentFirmographicsAccount Based MarketingLead ScoringMachine LearningAcquired

API Rating

API Evangelist Rating How this is scored →
scored 2026-07-20 · rubric v0.4

Composite quality — 10.5/100 · minimal

Contract Quality 0.0 / 25

Developer Ergonomics 1.7 / 20

Commercial Clarity 0.0 / 20

Operational Transparency 0.0 / 13

Governance 0.0 / 12

Discoverability 8.8 / 10

Agent readiness — 0/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 15

MCP Server 0 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

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Get Started 1

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

Build 1

SDKs, sample code, and the tooling you integrate with

Packages

Packages

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Company 1

The organization behind the API

Website

Website

Source (apis.yml)

aid: everstring
name: Everstring
description: EverString was a B2B predictive marketing and sales intelligence platform that used data science, machine learning,
  and a proprietary business data cloud to help go-to-market teams identify their best-fit accounts. Its capabilities included
  predictive lead and account scoring, account-based marketing segmentation, firmographic enrichment, similar-company discovery,
  ML-generated keywords, and industry classification, exposed to developers through an Enrichment API on developer.everstring.com
  secured with access-token authentication. Founded in 2012 and backed by investors including Lightspeed Venture Partners,
  EverString was acquired by ZoomInfo in November 2019 and its data and predictive capabilities were folded into the ZoomInfo
  platform; the everstring.com website now redirects to ZoomInfo Operations and the standalone developer portal has been largely
  decommissioned. This profile documents the historical API surface and current public footprint.
url: https://raw.githubusercontent.com/api-evangelist/everstring/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- lightspeed-venture-partners
x-tier: stub
x-tier-reason: portfolio-lead
x-status: acquired
x-acquired-by: zoominfo
x-acquired-date: 2019-11
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-19'
tags:
- Company
- Predictive Marketing
- Sales Intelligence
- Data Enrichment
- Firmographics
- Account Based Marketing
- Lead Scoring
- Machine Learning
- Acquired
common:
- type: DomainSecurity
  url: security/everstring-domain-security.yml
- type: Website
  url: https://www.everstring.com/
- type: DeveloperPortal
  url: https://developer.everstring.com/
- type: Packages
  url: packages/everstring-packages.yml
- type: LLMsTxt
  url: llms/everstring-llms.txt
apis:
- name: EverString Enrichment API
  description: The EverString Enrichment API exposed EverString's data cloud, AI, and machine-learning components as a micro-service
    - similar-company discovery, ML-generated keywords, industry classification, and firmographic enrichment - secured with
    access-token authentication. The standalone portal is now largely decommissioned following the ZoomInfo acquisition.
  humanURL: https://developer.everstring.com/
  baseURL: https://api.everstring.com
  properties: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence