Builder.ai

Builder.ai was a London-based AI-assisted software development platform, originally founded in 2016 as Engineer.ai by Sachin Dev Duggal, that let customers assemble custom web and mobile applications from reusable building blocks orchestrated by an AI assistant branded "Natasha." Positioned as a no-code/low-code "human-assisted AI" app factory, it raised large rounds from investors including Insight Partners, Microsoft, the Qatar Investment Authority and SoftBank's DeepCore. The company collapsed into insolvency and entered administration in 2025 amid a revenue-restatement controversy, and its public web and developer surfaces are no longer operational. This profile is retained in the API Evangelist network as a portfolio-lead record; no live API, developer portal, or documentation could be verified during enrichment.

Builder.ai is profiled on the APIs.io network. Tagged areas include Company, Artificial Intelligence, Application Development, No Code, and Low Code.

🌐 Visit website 📡 Source on GitHub
6.8/100 minimal ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-07-27 · rubric v0.5
0 APIs
CompanyArtificial IntelligenceApplication DevelopmentNo CodeLow CodeApp BuilderSoftware DevelopmentDefunct

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5
Composite quality — 6.8/100 · minimal
Contract Quality 0.0 / 25
Developer Ergonomics 0.0 / 20
Commercial Clarity 0.0 / 20
Operational Transparency 0.0 / 13
Governance 0.0 / 12
Discoverability 6.8 / 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
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/builderai: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

Security Posture 1

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Builderai Domain Security

DMARC

SECURITY

Resources

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity

Company 1

The organization behind the API

Website
Website

Source (apis.yml)

apis.yml Raw ↑ 
aid: builderai
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source: []
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/builderai.png
name: Builder.ai
description: Builder.ai was a London-based AI-assisted software development platform, originally founded in 2016 as Engineer.ai
  by Sachin Dev Duggal, that let customers assemble custom web and mobile applications from reusable building blocks orchestrated
  by an AI assistant branded "Natasha." Positioned as a no-code/low-code "human-assisted AI" app factory, it raised large
  rounds from investors including Insight Partners, Microsoft, the Qatar Investment Authority and SoftBank's DeepCore. The
  company collapsed into insolvency and entered administration in 2025 amid a revenue-restatement controversy, and its public
  web and developer surfaces are no longer operational. This profile is retained in the API Evangelist network as a portfolio-lead
  record; no live API, developer portal, or documentation could be verified during enrichment.
url: https://raw.githubusercontent.com/api-evangelist/builderai/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- insight-partners
x-tier: stub
x-tier-reason: portfolio-lead
x-status: defunct
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-18'
tags:
- Company
- Artificial Intelligence
- Application Development
- No Code
- Low Code
- App Builder
- Software Development
- Defunct
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: DomainSecurity
  url: security/builderai-domain-security.yml
- type: Website
  url: https://www.builder.ai/
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence