Ephemerals

Ephemerals

Ephemerals provides disposable cloud development environments—one dedicated machine per branch—with a preinstalled coding agent (Claude Code), secure network isolation, preview URLs per port, and team-shared visibility for reviewing and testing changes.

Ephemerals is developer tools software teams evaluate for software & gaming. Use this page to review pricing, integration signals, and the best alternatives before you commit.

Freemium Enterprise 70/100
#111 in Developer Tools (111 tools)
Just launched
Data reviewed Sep 6, 2026

Profile facts come from the vendor source. AiMatch labels unknown pricing or API details instead of estimating them.

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Quick Overview

Best for: Software & Gaming

What it does

Developer Tools software for decision-makers comparing workflow fit and alternatives.

Best fit

Software & Gaming

Pricing snapshot

Freemium from $10 / user / month

Next step

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Ephemerals

Ephemerals provides disposable cloud development environments where each branch gets a dedicated remote machine with an agent preinstalled. Developers can run their chosen agent (currently Claude Code), review code, spin up stacks, and preview live apps via a secure preview URL for each port. Environments are organization-owned, sized per-branch (2–16 vCPU), isolated from inbound network access, and automatically deleted when the pull request merges, keeping secrets scoped to the ephemeral instance.

The product is aimed at developer teams and organizations who need parallel, reproducible, and secure development and review environments—enabling long-running builds, instantaneous previews, and team access without using local resources.

Ephemerals gives every branch its own disposable cloud machine with a bare-bones Claude Code running on it, signed in with your own subscription or API key. Run agents in parallel, keep working while your laptop sleeps, preview your app on a URL, and SSH in whenever you want to take over.

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Key Features

One machine per branch

Each branch gets a dedicated, non-shared instance (sized from 2 to 16 vCPU) so branches run in parallel without port conflicts or waiting.

Preinstalled coding agent (bring-your-own key)

A bare-bones Claude Code agent boots on the machine; you can paste your Claude token or save it as an organization secret. The agent communicates directly with Anthropic from your instance.

Zero inbound ports & secure access channels

Instances run with no inbound rules; terminals, previews and port forwards travel outwards over AWS Systems Manager channels. Passwords are refused; only public keys are accepted for SSH.

Browser terminal, SSH, and per-port preview URLs

Access environments via an in-browser workspace terminal, SSH, or a preview URL per port (WebSockets and hot reload are proxied so previews update live).

Ephemeral lifecycle

Machines are reaped when the pull request merges and secrets scoped to that environment are deleted, limiting blast radius and avoiding long-lived hosts.

Team-shared environments

Environments belong to the organization; colleagues can open already-running branches instead of starting duplicate machines, and commits are authored from the active session.

Metered compute and seat billing

Billing separates per-seat charges and per-machine compute metered by the second, with a published price table for machine sizes.

Detached agent sessions

Agents run in tmux sessions on the instance so work continues even if the browser disconnects; logs and build output persist across reconnects.

Pricing

Free Tier Available

30 minutes a day on one 2 vCPU machine (page text: "Free tier 30 minutes a day One 2 vCPU / 1 GB machine").

Per seat

$10 / user / month
  • Billed monthly, counted from members of your organization
  • Everyone in the org can see and use every environment

2 vCPU machine

$0.18 / hour
  • 2 vCPU, 4 GB (per-hour compute price shown on page)
  • Charged by the second

4 vCPU machine

$0.36 / hour
  • 4 vCPU, 8 GB (per-hour compute price shown on page)
  • Charged by the second

8 vCPU machine

$0.72 / hour
  • 8 vCPU, 16 GB (per-hour compute price shown on page)
  • Charged by the second

16 vCPU machine

$1.44 / hour
  • 16 vCPU, 32 GB (per-hour compute price shown on page)
  • Charged by the second

Use Cases

Feature development and PR previews

Start a branch and get a running environment with a preview URL so reviewers can interact with the live app rather than a screenshot; reviewers can attach to the same terminal and file tree.

Parallel development across many branches

One machine per branch enables multiple agents and builds to run concurrently without local resource contention or port collisions.

Long-running builds and background jobs

Start long builds or cron jobs on the instance and reconnect later—the agent runs detached so processes continue even if you close your laptop.

Secure, isolated testing

Run untrusted or stateful experiments on disposable machines that are destroyed when the PR merges, reducing risk to local workstations.

Bring-your-own LLM agent workflows

Use your existing Claude subscription or API key so the agent uses your plan and tokens directly from the instance.

Integrations

Claude / Anthropic

Bring your Claude subscription or API key; the agent talks to Anthropic directly from your instance.

GitHub

Sign in with GitHub and pick repositories to create environments for branches and PR workflows.

SSH & local port forwarding

SSH access with public keys only; you can forward environment ports to your localhost (ssh -L).

AWS Systems Manager & KMS

Access channels (terminals, previews, forwards) use AWS Systems Manager; secrets are sealed with a KMS data key and encrypted under an encryption context.

Benefits

Improved security and reduced blast radius by isolating agents on disposable machines with no inbound ports.
Faster iteration and fewer conflicts because every branch gets its own sized instance and parallelism is supported.
Team visibility and collaboration since environments belong to the organization and colleagues can join running branches.
Persistence for long tasks: sessions run detached on the instance so builds, logs and cron jobs survive disconnects.
Cost control and transparency via separate per-seat and per-machine compute billing metered by the second.

Limitations

Some agent harnesses are not yet available (Codex and Gemini CLI are listed as "coming soon").
Mobile workspace and Slack app are in progress and not yet generally available (page lists these as "In progress").
Environments are single-instance per branch and sized explicitly—there is no bin-packing across branches ("The size you pick is the machine you get — one environment, one instance, no bin-packing").

Frequently Asked Questions

No verified FAQs are available.

Getting Started

  1. 1 Sign in (Sign in with GitHub is offered) and pick the repositories you want to work on.
  2. 2 Start a free environment or launch a paid environment; paste your Claude token at launch or run /login in the terminal on the machine.
  3. 3 Optionally save a key as an organization secret so subsequent environments come up with it preconfigured, then open the workspace, attach via browser terminal or SSH, and use the preview URLs.

Support

No verified support channels are available.

API

Available: No

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