Raindrop
raindrop.ai
Actively hiring
AI Evaluation & Observability
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Financials
Funding and backers
Total raised
$469k
2 rounds on record
Latest round
Series A
Sep 2026 · 1 mo ago
Team
51-200
employees, estimated range
Backers
4
Y Combinator, Lightspeed Venture Partners
The money's age
Fresh money
1 months since the last round · not hiring
Momentum
35/100
in the news, fresh money
Last sign of life
this month
a posting or a news item
The story so fareach stage dated by its source: the company's releases, the press, registers, filings
Sep 16
Raised a round Series A · led by CRV
Apr 28, 2025
Launched on Hacker News Show HN: Raindrop – Sentry for AI Products
Jan 2024
Went through Y Combinator
Oct 20, 2022
Raised a round Convertible Note $469k · SEC Form D
2022
Founded
Tractionpublic signals, read monthly
Funding rounds
| Round | Date | Amount | Investors | Source |
|---|---|---|---|---|
| Series A | Sep 2026 | — | CRV lead | tmcnet.com |
| Convertible Note | Oct 2022 | $469k | — | SEC Form D |
Registers and programsofficial lists and records that name the company
| Legal entity | Raindrop Studios Inc. | SEC Form D |
Founders and leadersfrom filings, registers and the company's site
Andrew LongExecutive OfficerSEC Form D
Backed byfrom the funds' portfolios and accelerator catalogs
Y Combinator 
Lightspeed Venture Partners 
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News
Report
Raindrop Raises Series A Funding For AI Agent Reliability Platform
Raindrop has raised a Series A led by CRV, bringing its total funding to $50 million as the company expands technology designed to detect failures in autonomous AI agents. Existing investors Lightspeed Venture Partners and Y Combinator participated alongs
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Raindrop Series A takes it to $50m for agent monitoring
Raindrop's Series A, led by CRV, takes total funding to $50m. The startup catches AI agents failing in production, and now before the change ships.
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Raindrop Announces Series A and $50M in Total Funding Led by CRV to Protect the World from AI Agent Failures - AOL
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Raindrop Announces Series A and $50M in Total Funding Led by CRV to Protect the World from AI Agent Failures
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Raindrop Announces Series A and $50M in Total Funding Led by CRV to Protect the World from AI Agent Failures
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rd-signal-2: Frontier Classification at Production Scale
A hybrid classification system that combines frontier-level judgment with the cost and speed required to run continuously in production.
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Comparing Machine Learning Models of Raindrop Formation
The simplest model, based on polynomials, yields the best performance.
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Raindrop AI推出開放原始碼工具Workshop支援AI代理本機除錯與評估
可觀測性新創業者Raindrop AI推出開放原始碼工具Workshop讓開發者可在本機追蹤AI代理的執行過程並透過模型上下文協定MCP將追蹤記錄提供給Claude Code協助開發團隊找出代理失敗原因、產生評估測試以及修正程式碼
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GitHub - raindrop-ai/workshop: Give your coding agent the power to write and run agent evals.
Give your coding agent the power to write and run agent evals. - raindrop-ai/workshop
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People
Andrew Long
Executive Officer
Jordan Prince
Director
Bartosz Lipinski
Director
Names and roles come from public filings, company registers and the company's own site. Is this you? Correct or remove · How we handle this data
Offices
Where the company hires and what each office is for
Cities
1
Hiring now
0
Countries
1
San Francisco
United States
HQ
50-200 est. staff