# Managed infra, agents, and data for experimenting with agents as users

Run unbiased simulations at scale to understand how coding agents use and discover products

## Trusted by

Mux, MongoDB, Goldsky, Dosu, Taubyte, Gentle Weapons

## Infra and tools to run simulations on your laptop or scale to the cloud

Define your experiment, lay out your tests, pick your agent, then let us do the work of managing infra and data.

- **Remote or local runs** — Run locally for free, or automatically parallelize runs at massive scale on managed infrastructure with AX Cloud.
- **Unbiased simulations** — Every run starts from a clean, isolated sandbox, with your custom setup. No bias. No context pollution. No cheating.
- **Any agent, any model** — Test with Claude, Codex, Cursor, and more. Bring your own LLM keys, or use our managed agents at market prices.

[Learn more](https://docs.514.ax)

## Understand every journey agents take through your product

Agent transcripts, sandbox data, timelines and comparisons turn every simulated session into evidence you can inspect and share.

- **Full data capture** — Agent transcripts, OTEL logs, errors, commands: everything in the system recorded, versioned, and warehoused for analysis.
- **Compare variants side by side** — See how success rate, cost, and wall-clock time shift between versions of your product.
- **Sandbox snapshots** — Retain the full sandbox end state (file system and memory) and resume for further analysis at any time.

[Learn more](https://docs.514.ax)

## Turn evidence into product and marketing decisions

Ship code, docs, and content that are proven to make your product more discoverable and usable by agents.

- **Results in your pull requests** — Experiment summaries land on the PR, so the evidence arrives before you merge.
- **Gate releases on agent tests** — Treat agent task success like CI: block regressions before they ship.
- **Track improvement over time** — Watch success rates climb as you remove the friction agents hit.

[Learn more](https://docs.514.ax)

## Get started

Start your first experiment in minutes, and uncover how coding agents interact with your product

[Quickstart guide](https://docs.514.ax/getting-started) · [Explore plans](/pricing)

## Use anywhere. Embed into your workflows, go-to-market pipeline or products

- **Actionable GEO** — Learn if your tool is mentioned or selected by agents, and why. Test in realistic contexts, with code, MCPs, skills, tools and running applications.
- **Product Improvement** — A/B test variants against key product metrics, and prove which code changes will actually drive improvements with agent users.
- **Agent-centric GTM** — Publish competitive analysis showing how your product is better with agents, backed by defensible, reproducible data.

## Built for humans. Rebuilt for agents.

- **Sep 2023 — Founded on developer experience.** 514 starts out building data infra and tooling for human engineers.
- **Jan 2025 — Agents as primary users.** Coding agents become the majority users of our dev tools.
- **Oct 2025 — Optimizing our AX.** Internal platform to systematically measure and improve our agent experience.
- **Jul 2026 — Launch AX Cloud.** The tools we built to help serve agentic users, available for all

> Agents are your new users. Learn from them.

[Read our Manifesto](/about)

## Partner testimonials

> The very first experiment we did with 514 turned up gaps in our CLI that were tripping up agents as they tried to build with Mux. After an immediate fix, we were able to reduce tool call failure by 34%.

— Dylan Jhaveri — Director of Self Service, Mux

> Building an agent experimentation platform that actually holds up is much harder than it looks. Fiveonefour’s results have given us real clarity on what agents are doing and why — and that clarity has already shaped decisions on our roadmap.

— Pablo Stern-Plaza — Chief Product Officer, AI and Emerging Products, MongoDB

> For Dosu, agent experience isn't polish. It determines whether the knowledge base gets better every time an agent works. 514 gives us a repeatable way to measure and improve that loop before we ship.

— Devin Stein — CEO, Dosu

> 514 exposed areas for improvement we would never have found on our own.

— Sami Fodil — CEO, Taubyte

> Autonomy you can't measure is autonomy you can't ship. 514 lets us run agents against our systems in isolated environments and see precisely how they behave.

— Jk Jensen — CEO, Gentle Weapons

Honored to help those building incredible dev tools and honing them for agents