The software engineering platform for the AI era
Hold your agents to a higher standard.
Crowstack is recursive self-improvement as a service: agents that autonomously and continuously work through your codebase, raising code quality, adding new features, fixing bugs, and unlocking the value already sitting in the code you have.
The problem
Software is discovered, not designed.
Requirements shift, edge cases surface, and the right architecture only reveals itself as the work unfolds. Ambiguity is the baseline, and today's agents weren't built for it.
History is repeating itself.
Software development keeps cycling through the same arc: chaos, then process, then a synthesis that sticks. We've been here before. We're here again.
Each era found an engineering discipline that tamed its chaos. Agents now write code faster than ever, but the discipline that makes that code trustworthy hasn't caught up. Right now, that gap shows up in two ways.
Automated insanity
Point an agent at ambiguous work and it charges ahead, guessing where the spec is silent, inventing requirements, and confidently shipping the wrong thing. Fast, tireless, and wrong.
Micromanagement liability
So you supervise every step. You review every diff, re-verify every output by hand, and re-explain the same context on every task. The agent never gets more trustworthy, and you never get your time back.
Both failure modes share one root cause: agents don't follow an engineering process. The rigor that makes human engineers trustworthy (breaking down the work, recording decisions, testing assumptions, carrying lessons forward) simply isn't there.
The product
Recursive self-improvement, as a service.
Crowstack points autonomous agentic development at your codebase and keeps that work running. Every improvement makes the next one easier, so the returns compound.
Untangle what's there.
Agents restructure your existing code into something clean, consistent, and understandable.
Set a solid foundation.
Tests, conventions, and architecture that make every future change safer and faster.
Add what matters.
With the foundation in place, agents start shipping the features your product needs next.
Underneath every step runs a continuous measure, adjust, measure loop. Each change is measured, and the next one is chosen from what was learned.
We build Crowstack with Crowstack: it is running this loop on its own codebase today. Now we're accepting Alpha Partners who want it running on theirs.
Become an Alpha PartnerThe approach
Great engineers navigate ambiguity through rigor.
Crowstack gives
your agents the same.
Crowstack helps you trust your agents by building engineering rigor into every task: the same disciplines your best people use, made systematic.
On a good human team, rigor is a habit: specs before code, tests before merge, reviews before release, decisions written down. Agents don't have habits. Crowstack makes that process the default path for every task, so rigor isn't optional and doesn't depend on you watching.
Rigorous engineering, built into every task.
Four pillars make it work.
Embedded process
Proven engineering workflows (plan, build, test, review) built into every task.
Knowledge accumulation
Agents learn from every task and get better over time.
Human-agent collaboration
People and agents working together as peers, not master and tool.
Full auditability
Every change traceable to a decision, a reason, and a responsible human.
Pillar 01 · Process
Workflows encode how your team ships.
- A large library of workflow templates, from a one-line fix to a multi-stage feature.
- Fully customizable to your team's process, conventions, and definition of done.
- The agent follows the same steps, every time. No skipped reviews, no forgotten tests.
Consistency you can count on, on every task.
Pillar 02 · Memory
Knowledge accumulates across every task.
- Decisions, conventions, and lessons are captured as a living knowledge graph.
- Agents leverage prior learnings instead of starting from zero every time.
- Explore what the system knows in the graph visualizer.
Your agents get smarter about your codebase with every task they complete.
Pillar 03 · Collaboration
Humans and agents work as peers.
- A version-controlled, document-driven discussion loop: proposals, feedback, and decisions in writing.
- Mental-model alignment before the work begins, so you're never surprised by the result.
- Disagreements resolved and conclusions reached with a traceable changelog.
You stay on the loop, not in the weeds.
Pillar 04 · Auditability
Every decision: who made it, and why.
- Every change carries structured provenance: agent, human, or system; the component that produced it; and the responsible person behind it.
- Git-native trailers make the whole history traceable, from any line of output back to a decision and a name.
- Nothing happens in the dark. Everything is attributable.
Trust, because you can verify.
Services
Turn AI Slop into Michelin-star Dining.
You vibe-coded something real. It works, mostly, but now every change breaks something else and you're stuck. Crowstack can refactor your existing codebases and set them up on a secure foundation that's ready for whatever comes next, so you can get back to building.
Why it matters
- Low-quality code is less secure. Unchecked inputs, leaked secrets, and dependencies nobody understands are where breaches start.
- It gets harder to maintain. Tangled code means every fix takes longer than the last.
- New features get slower. You end up fighting the codebase instead of building on it.
- It can't scale. Shortcuts that held up for ten users fall over at ten thousand.
Proper engineering, so your software can grow up.
Book a call
The team
Built by people who ship.
Crowstack is built by a small team building software for the AI era. It came out of the patterns we saw helping teams ship with agents in the loop.
Previously CEO and co-founder of Refold Languages, building software for tens of thousands of language learners. Before that, Director of Engineering & Product at WeSpire. B.Sc. Computer Science & Physics; 15+ years shipping software.
ethan@crowstack.ai
Previously CEO & Co-founder of Divisible Inc. Product-minded engineer who has shipped across mobile, AI, real estate, and oil & gas. 8 patents. Previously software engineering at BlackBerry. Bachelor Computer Science and MBA. 15+ years shipping software.
chris@crowstack.aiGet involved
We're looking for Alpha Partners.
Crowstack isn't public yet. We're working with a small group of teams who want to help shape what rigorous, agent-driven engineering looks like in practice. If you're building something ambitious and want a partner that helps you ship faster without losing the plot, we'd love to hear from you. A sentence or two on what you're building is plenty.
Become an Alpha Partner