Gantto

Gantto was a web-based Gantt chart and project scheduling SaaS launched in August 2010, backed by Y Combinator and 500 Startups (500 Global). It let teams create and share project schedules in the browser as an alternative to Microsoft Project, with a customer base that reportedly included Twitter, Lucasfilm, and Fujitsu. Gantto was acquired by Dutch competitor Tom's Planner on July 9, 2013, and the product was subsequently discontinued, with users migrated to Tom's Planner. gantto.com now redirects to tomsplanner.com. This company is retained in the API Evangelist network as a historical portfolio-lead record; it publishes no developer program, API, or technical surface to enrich.

Gantto is profiled on the APIs.io network. Tagged areas include Company, Project Management, Gantt Chart, Project Scheduling, and SaaS.

🌐 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

CompanyProject ManagementGantt ChartProject SchedulingSaaSDefunctAcquired

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

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Resources

Company 2

The organization behind the API

Website

Website

CrunchBase

CrunchBase

Other 1

Properties that don't map to a standard resource type

Acquirer

Acquirer

Source (apis.yml)

aid: gantto
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/gantto.png
name: Gantto
description: Gantto was a web-based Gantt chart and project scheduling SaaS launched in August 2010, backed by Y Combinator
  and 500 Startups (500 Global). It let teams create and share project schedules in the browser as an alternative to Microsoft
  Project, with a customer base that reportedly included Twitter, Lucasfilm, and Fujitsu. Gantto was acquired by Dutch competitor
  Tom's Planner on July 9, 2013, and the product was subsequently discontinued, with users migrated to Tom's Planner. gantto.com
  now redirects to tomsplanner.com. This company is retained in the API Evangelist network as a historical portfolio-lead
  record; it publishes no developer program, API, or technical surface to enrich.
url: https://raw.githubusercontent.com/api-evangelist/gantto/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- 500-global
x-tier: stub
x-tier-reason: portfolio-lead
x-status: defunct
x-status-reason: acquired-by-toms-planner-2013-product-discontinued
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-19'
tags:
- Company
- Project Management
- Gantt Chart
- Project Scheduling
- SaaS
- Defunct
- Acquired
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://gantto.com
- type: Acquirer
  name: Tom's Planner
  url: https://www.tomsplanner.com
- type: CrunchBase
  url: https://www.crunchbase.com/organization/gantto
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence