Until Labs

Until Labs (branded "until") is a San Francisco deep-tech biotechnology company developing reversible cryopreservation technology for human donor organs. Its mission is to build a "pause button for biology" by safely vitrifying organs at ultra-low temperatures without ice formation, then rewarming them for transplant — extending the viability window for donor organs and improving transplant outcomes. The company builds perfusion hardware, cryoprotective agents, cooling and rewarming infrastructure, and organ-health assessment methods, working toward whole-body medical hibernation. Co-founded by Laura Deming and Hunter Davis, Until has raised over $100M including a $58M Series A (September 2025) led by Founders Fund with Lux Capital participating. As a wet-lab hardware and life-sciences company, Until publishes no public developer API, SDK, or software platform. This profile was surfaced as a Lux Capital portfolio company and enriched from public sources.

Until Labs is profiled on the APIs.io network. Tagged areas include Company, Deep Tech, Biotechnology, Cryopreservation, and Organ Transplant.

Until Labs’ developer surface includes engineering blog and 7 more developer resources.

🌐 Visit website 📡 Source on GitHub
8.6/100 minimal ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-07-27 · rubric v0.5
0 APIs
CompanyDeep TechBiotechnologyCryopreservationOrgan TransplantLife SciencesMedical Hardware

Kin Score

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scored 2026-07-27 · rubric v0.5
Composite quality — 8.6/100 · minimal
Contract Quality 0.0 / 25
Developer Ergonomics 0.4 / 20
Commercial Clarity 0.0 / 20
Operational Transparency 0.7 / 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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Security Posture 1

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

Until Labs Domain Security

TLSv1.3 · HSTS

SECURITY

Resources

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Roadmap
Roadmap

Company 6

The organization behind the API

Website
Website
 Blog
Blog
 About
About
 Careers
Careers
 LinkedIn
LinkedIn
 Twitter
Twitter

Source (apis.yml)

apis.yml Raw ↑ 
aid: until-labs
name: Until Labs
description: Until Labs (branded "until") is a San Francisco deep-tech biotechnology company developing reversible cryopreservation
  technology for human donor organs. Its mission is to build a "pause button for biology" by safely vitrifying organs at ultra-low
  temperatures without ice formation, then rewarming them for transplant — extending the viability window for donor organs
  and improving transplant outcomes. The company builds perfusion hardware, cryoprotective agents, cooling and rewarming infrastructure,
  and organ-health assessment methods, working toward whole-body medical hibernation. Co-founded by Laura Deming and Hunter
  Davis, Until has raised over $100M including a $58M Series A (September 2025) led by Founders Fund with Lux Capital participating.
  As a wet-lab hardware and life-sciences company, Until publishes no public developer API, SDK, or software platform. This
  profile was surfaced as a Lux Capital portfolio company and enriched from public sources.
url: https://raw.githubusercontent.com/api-evangelist/until-labs/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- lux-capital
x-tier: stub
x-tier-reason: portfolio-lead
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source: []
  generated: '2026-07-22'
  method: derived
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-21'
tags:
- Company
- Deep Tech
- Biotechnology
- Cryopreservation
- Organ Transplant
- Life Sciences
- Medical Hardware
image: https://www.untillabs.com/favicon.ico
apis: []
common:
- type: DomainSecurity
  url: security/until-labs-domain-security.yml
- type: Website
  url: https://www.untillabs.com/
- type: Blog
  url: https://www.untillabs.com/blog
- type: Roadmap
  url: https://www.untillabs.com/roadmap
- type: About
  url: https://www.untillabs.com/science-technology
- type: Careers
  url: https://jobs.lever.co/until
- type: LinkedIn
  url: https://www.linkedin.com/company/untillabs
- type: Twitter
  url: https://x.com/untillabs
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
x-enrichment:
  date: '2026-07-21'
  status: minimal
  artifacts_added: 1
  pass: local-v1