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14,448 startups · 29 programs

Raindrop

Active · Sentry for AI Agents

WebsiteYC profile

Why it ranks

How the rank works
20signal of 100 · rising 8
  • led by LightspeedNotable round · Funding (funding.fru.dev)+6
  • team of 9Team size · YC's directory+5.2
  • went through YCProgram · this site+4
  • on 3 Glyph sourcesSeen across Glyph · the registry (companies.fru.dev)+3
  • hiringHiring · Titles (titles.fru.dev), YC+2

A sum of public facts, not a judgement and not investment advice.

Competitors

AILemmaShared: silent failure, monitoring, agentYC F25San FranciscoStartup →AIWild MooseShared: root causeYC W23New York CityStartup →DataInactiveSerialShared: root cause, fix, aboutYC W23San FranciscoStartup →AIInactiveSaatvyShared: root causeYC S23San FranciscoStartup →AICiba HealthShared: root causePlug and PlayUnited StatesStartup →
Companies closest to Raindrop
Company
LemmaShared: silent failure, monitoring, agentYC F25ActiveAI, Data, Devtools
Wild MooseShared: root causeYC W23ActiveAI, Devtools
SerialShared: root cause, fix, aboutYC W23InactiveData, Devtools
SaatvyShared: root causeYC S23InactiveAI
Ciba HealthShared: root causePlug and Play Not statedAI

Adjacent

OtherGritwellShared: root causeAlchemist Class 22San FranciscoStartup →AIThe Context CompanyShared: monitoring, agent, fixYC F25San FranciscoStartup →Developer toolsAcquiredKeepShared: monitoring, alertYC W23Tel Aviv-YafoStartup →AIDeeptraceShared: root cause, alert, agentYC F25San FranciscoStartup →AIInactiveNeptune.ioShared: monitoring, alert, fixYC S14San FranciscoStartup →
Companies next to Raindrop
Company
GritwellShared: root causeAlchemist Class 22Not statedOther
The Context CompanyShared: monitoring, agent, fixYC F25ActiveAI, Data, Devtools
KeepShared: monitoring, alertYC W23AcquiredDevtools
DeeptraceShared: root cause, alert, agentYC F25ActiveAI
Neptune.ioShared: monitoring, alert, fixYC S14InactiveAI, Devtools

Also from W24 in AI

All of W24
AIRespanOpen-source, extensible AI gateway with observability and evalsYC W24San FranciscoStartup →AIInactiveAbelTransforming document review for litigation teamsYC W24San FranciscoStartup →AIAdaptedAI physical therapy for athletesYC W24San FranciscoStartup →AIInactiveAedilicOpen-Source AI-generated image/deepfake detectionYC W24San FranciscoStartup →AIAftercareConversational AI surveys with intelligent follow-up questionsYC W24New York CityStartup →AIAgentic LabsAI system design tools for dev teamsYC W24New York CityStartup →
Company
RespanOpen-source, extensible AI gateway with observability and evalsteam of 20hiringActiveAI, Devtools
AbelTransforming document review for litigation teamsteam of 2InactiveAI
AdaptedAI physical therapy for athletesteam of 2ActiveAI
AedilicOpen-Source AI-generated image/deepfake detectionteam of 2InactiveAI
AftercareConversational AI surveys with intelligent follow-up questionsteam of 3ActiveAI, Data
Agentic LabsAI system design tools for dev teamsteam of 2ActiveAI, Devtools

About Raindrop

Monitor your AI agents the right way. AI engineers use Raindrop to get alerts about silent failures in their AI agents. Raindrop sends you alerts when your AI misbehaves and links straight to the events, so you can dig into the conversations or traces, understand the root cause, and fix it, fast.

YC batch
W24 · Winter 2024
Status, per YC
Active
Category
AI, Developer tools
Team size
9
Location
San Francisco, CA, USA
Checked
6h ago

YC tags: B2B, Monitoring, AI

Changes seen

TagsOct 19, 2026

No longer tagged Artificial Intelligence.

Source ↗

Raindrop in W24: 248 companies, 84% AI

Company profileFundingleadersPaydaysReleasessocialsterms

Raindrop: questions

Which YC batch was Raindrop in?

Raindrop was in Y Combinator's Winter 2024 batch (W24).

Is Raindrop still active?

Y Combinator lists Raindrop as active.

Where is Raindrop based?

Raindrop lists San Francisco, CA, USA as its location on YC's directory.