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Startups14,448Programs29

14,448 startups · 29 programs

Rindler

Active · The IDE for Tokenmaxxers

WebsiteYC profile

Why it ranks

How the rank works
7signal of 100 · rising 7
  • went through YCProgram · this site+4
  • team of 2Team size · YC's directory+2.5

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

Competitors

AIInactiveSublingualShared: desktop app, infrastructureYC W25San FranciscoStartup →AIParadev (formerly Superset)Shared: desktop app, coding agent, ideYC X26San FranciscoStartup →AICapyShared: coding agent, ideYC F24San FranciscoStartup →
Companies closest to Rindler
Company
SublingualShared: desktop app, infrastructureYC W25InactiveAI, Devtools
Paradev (formerly Superset)Shared: desktop app, coding agent, ideYC X26ActiveAI, Devtools
CapyShared: coding agent, ideYC F24ActiveAI, Devtools

Adjacent

AITraceRoot.AIShared: coding agent, infrastructureYC S25San FranciscoStartup →AICentauri AIShared: coding agent, session, progressYC W24San FranciscoStartup →AINuancedShared: desktop app, coding, agentYC W24San FranciscoStartup →AIAgent RelayShared: coding agent, session, stuckYC F26San FranciscoStartup →AIClickShared: coding agent, infrastructureYC S26San FranciscoStartup →
Companies next to Rindler
Company
TraceRoot.AIShared: coding agent, infrastructureYC S25ActiveAI, Devtools
Centauri AIShared: coding agent, session, progressYC W24ActiveAI, Devtools
NuancedShared: desktop app, coding, agentYC W24ActiveAI, Devtools
Agent RelayShared: coding agent, session, stuckYC F26ActiveAI, Devtools
ClickShared: coding agent, infrastructureYC S26ActiveAI, Devtools

Also from S26 in AI

All of S26
AIArchalAPI sandboxes, built for AI agentsYC S26San FranciscoStartup →AIAutoresearch, Inc.Autoresearch as a service: we solve your hardest measurable problemsYC S26San FranciscoStartup →AIInkboxThe identity and communication layer for AI agentsYC S26San FranciscoStartup →AIRiftenEarned intelligence. An independent AI research lab.YC S26San FranciscoStartup →AIAgnost AIWe find where AI agents fail, then train better models to run them.YC S26San FranciscoStartup →AICautionHosting platform for software you can't afford to have hackedYC S26George TownStartup →
Company
ArchalAPI sandboxes, built for AI agentsteam of 2ActiveAI, Devtools
Autoresearch, Inc.Autoresearch as a service: we solve your hardest measurable problemsteam of 3ActiveAI, Devtools
InkboxThe identity and communication layer for AI agentsteam of 3ActiveAI, Devtools
RiftenEarned intelligence. An independent AI research lab.team of 5ActiveAI, Devtools
Agnost AIWe find where AI agents fail, then train better models to run them.2 programsteam of 2ActiveAI, Data, Devtools
CautionHosting platform for software you can't afford to have hackedteam of 5ActiveAI, Devtools

Founders

  • Michael SerranoFounder/CEO
  • Arthur De Los SantosFounder/CTO

About Rindler

We build Maxxwell, a desktop app for people who run several coding agents at once. Past two or three sessions, you become the bottleneck. Every session asks you something, most of it small, and you spend the day answering instead of deciding. It is also hard to tell which sessions are making progress, which are stuck on something trivial, and which have quietly started building the wrong thing. Maxxwell puts every session in one window and marks each one working, idle, or waiting on you. On top of that sits an orchestrator, a real coding-agent session of its own that reads the others and reports back. You talk to it instead of to twelve terminals. It tells you what landed, what it decided for you, and what actually needs your call. Every worker is your own tool, unmodified. Claude Code, Codex and Cursor Agent run in real terminal sessions you can attach to and take over at any point

YC batch
S26 · Summer 2026
Status, per YC
Active
Category
AI, Developer tools
Team size
2
Location
Boston, MA, USA
Founded
2025
Checked
6h ago

YC tags: Developer Tools, SaaS, Infrastructure, AI

Changes seen

TagsOct 19, 2026

Newly tagged AI; no longer tagged Artificial Intelligence.

Source ↗

Rindler in S26: 229 companies, 88% AI

LinkedIn

Rindler: questions

Which YC batch was Rindler in?

Rindler was in Y Combinator's Summer 2026 batch (S26).

Is Rindler still active?

Y Combinator lists Rindler as active.

Who founded Rindler?

Rindler's founders, as listed on its YC page: Michael Serrano (Founder/CEO), Arthur De Los Santos (Founder/CTO).

Where is Rindler based?

Rindler lists Boston, MA, USA as its location on YC's directory.