Shutdown
Jul 2025Humanloop told customers it would shut down in July 2025 in preparation for joining Anthropic.
SourceHumanloop is the LLM evals platform for enterprises.
Company research
Public company, workplace, funding, and market signals
Overview
Humanloop built an enterprise LLM development platform for prompt management, evaluation, and observability, designed to help product, engineering, and domain experts collaborate on reliable AI apps; in August 2025 the team joined Anthropic and the standalone platform was sunset.
Primary product
Enterprise LLM evals platform for prompt management, evaluation, and observability
Founded
2020
Headquarters
London, United Kingdom
Team size
1-10
Work style
Hybrid
Industry
Software Development
Sub-industry
LLM evaluation, prompt management, and AI observability
Offices
London, United Kingdom
San Francisco, California, United States
Business model
B2B SaaS
enterprise software subscription
freemium/trial
annual enterprise contracts
custom enterprise deployments
Funding
Stage
Seed
Total raised
$7.9M
Latest round
Seed · Nov 2023
People & investors
Work & culture
Small, fast-moving, customer-obsessed startup culture with tight collaboration between engineering, product, and domain experts; hybrid office cadence with in-person days on Tuesdays and Wednesdays and a strong emphasis on rapid learning and shipping.
Work style
Hybrid
Compensation
A public Frontend Product Engineer posting listed $80K-$150K salary, and company/job pages also advertised competitive salary plus share options; broader comp bands were not publicly published.
Benefits
competitive salary
share options
£1,000 book/conference allowance
regular company retreats
Product & market
Pricing
Free trial plus monthly self-serve plans; enterprise subscriptions with annual billing, custom deployments, and tailored support
Differentiators
- —Visual prompt and eval workflows for non-engineers
- —LLM-as-a-judge plus human review and offline/online evals
- —Prompt management, evaluation, and observability in one platform
- —Multi-LLM support and SDKs for production integration
- —Enterprise security/compliance options such as SSO/SAML, RBAC, VPC, SOC 2 Type II, and GDPR
- —Collaboration between PMs, engineers, and domain experts
Technology
Python
FastAPI
PyTorch
TypeScript
Next.js
React
Tailwind CSS
AWS
OpenAI
Anthropic
Google AI
Customers
Gusto
Vanta
Duolingo
Filevine
Dixa
FMG
Athena
Twain
Cursor
Competitors
LangSmith
Langfuse
Braintrust
Arize Phoenix
PromptLayer
Patronus AI
Fiddler AI
Scale & contact
Estimated revenue
$1M-$10M
Estimated monthly visits
43.8K
Traffic estimate as of Jun 2026
Signals & risks
Acquisition
Aug 2025Anthropic announced it had hired Humanloop's co-founders and most of the team in an acqui-hire; Humanloop said the standalone platform was being sunset.
SourceLatest news
TechCrunch · Aug 2025
TechCrunch reported that Anthropic acquired the Humanloop team in an acqui-hire; Humanloop had told customers it would shut down in July 2025, and the founders plus roughly a dozen engineers/researchers joined Anthropic.
Humanloop · Aug 2025
Humanloop's own announcement said the team was joining Anthropic and that the standalone Humanloop platform was being sunset.
Humanloop · Nov 2024
Humanloop said it had reached general availability, described its eval-driven workflow for LLM apps, and said it had raised about $8M from investors including YC Continuity, Index Ventures, LocalGlobe, and founders of Datadog and Segment.
Index Ventures · Jul 2022
Index Ventures announced Humanloop's $2.6M seed round and described the product as helping humans teach AI algorithms via data labeling and feedback workflows.
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