Top accelerator startups

Startups14,448Programs29

14,448 startups · 29 programs

RATLOG

Active · Reusable heavy-lift rockets

WebsiteYC profile

Why it ranks

How the rank works
8signal of 100 · rising 8
  • went through YCProgram · this site+4
  • team of 4Team size · YC's directory+3.6

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

Competitors

AIRelativity SpaceShared: heavy lift, rocket, reusableYC W16Los AngelesStartup →OtherJetPack AviationShared: heavy lift, aviation and spaceYC W19Los AngelesStartup →OtherCosmic RoboticsShared: heavy liftYC S26San FranciscoStartup →
Companies closest to RATLOG
Company
Relativity SpaceShared: heavy lift, rocket, reusableYC W16ActiveAI
JetPack AviationShared: heavy lift, aviation and spaceYC W19ActiveOther
Cosmic RoboticsShared: heavy liftYC S26 +1ActiveOther

Adjacent

OtherRockeloxShared: reusable heavy, heavy liftMassChallenge Switzerland and UK 2026United KingdomStartup →OtherHStarShared: reusable heavy, rocketAntler 2022USStartup →OtherInactiveSpaceRydeShared: commercial space launch, rocket, aviation and spaceYC W19San FranciscoStartup →OtherVelontraShared: commercial space launch, rocket, aviation and spaceYC S22DaytonStartup →OtherReditus SpaceShared: reusable, aviation and spaceYC W25AtlantaStartup →
Companies next to RATLOG
Company
RockeloxShared: reusable heavy, heavy liftMassChallenge Switzerland and UK 2026Not statedOther
HStarShared: reusable heavy, rocketAntler 2022Not statedOther
SpaceRydeShared: commercial space launch, rocket, aviation and spaceYC W19InactiveOther
VelontraShared: commercial space launch, rocket, aviation and spaceYC S22ActiveOther
Reditus SpaceShared: reusable, aviation and spaceYC W25 +1ActiveOther

Also from F26

All of F26
AI0.securityThe autonomous cybersecurity teamYC F26San FranciscoStartup →AIAcyclic LabsAgent swarms that make long-running tasks exponentially fasterYC F26LondonStartup →AIAdalat AIAI OS transforming courts, accelerating justiceYC F26BengaluruStartup →AIAdside.aiAI agency that manages paid ads on Meta, Google, LinkedIn, etc.YC F26San FranciscoStartup →AIAgent 37Cloud Sandbox for AgentsYC F26New York CityStartup →AIAgent RelayLet your teams' coding agents message each otherYC F26San FranciscoStartup →
Company
0.securityThe autonomous cybersecurity teamteam of 2ActiveAI, Devtools
Acyclic LabsAgent swarms that make long-running tasks exponentially fasterteam of 2ActiveAI, Devtools
Adalat AIAI OS transforming courts, accelerating justiceteam of 80hiringActiveAI
Adside.aiAI agency that manages paid ads on Meta, Google, LinkedIn, etc.team of 2ActiveAI
Agent 37Cloud Sandbox for AgentsActiveAI, Devtools
Agent RelayLet your teams' coding agents message each otherteam of 2ActiveAI, Devtools

About RATLOG

YC batch
F26 · Fall 2026
Status, per YC
Active
Category
Other
Team size
4
Location
Dresden, SN, Germany
Checked
6h ago

YC tags: Commercial Space Launch

Changes seen

WebsiteOct 19, 2026

Website listed: ratlog.space.

Source ↗
Website linkOct 19, 2026

Website link changed from none to https://www.ratlog.space/.

Source ↗
Joined a programOct 12, 2026

Joined Y Combinator's Fall 2026 batch (F26).

Source ↗

RATLOG in F26: 219 companies, 89% AI

RATLOG: questions

Which YC batch was RATLOG in?

RATLOG was in Y Combinator's Fall 2026 batch (F26).

Is RATLOG still active?

Y Combinator lists RATLOG as active.

Where is RATLOG based?

RATLOG lists Dresden, SN, Germany as its location on YC's directory.