Build agents that keep working beyond their horizon

A framework and hosted backend for building and running agents.

Agents are taking on work that outlasts a single session. They run for hours and pause for people. Their progress needs to survive interruptions. Infrastructure designed around short, stateless requests makes that harder than it should be. We’re building a backend for the way agents work.

Meet Jaccard.

» Deploy your agent
$ jaccard deploy

==> deploying editor-agent
    ready  1/1
    url    https://editor-agent.jaccard.app

Define your agent. Deploy it.

Write instructions and skills in Markdown. Add custom tools in code, then deploy on Jaccard.

» Run code in a sandbox
const sandbox = await ctx.getSandbox();

await sandbox.run({
  command:
    "ffmpeg -i input.mp4 -t 30 clip.mp4",
});

Run code in isolation.

Define your sandbox once. Jaccard provisions it when your tools need it and reuses it within the session.

» Ask before publishing
export default defineTool({
  description: "Publish the finished clip",
  approval: () => "user-approval",
  async execute({ path }) {
    return publishClip(path);
  },
});

Pause and resume.

Wait for human approval or an external event. Pick up where the agent left off.

Early look

The building blocks for production agents

Durable execution: Preserve progress between steps. Resume after a pause or interruption.
Sandboxes: Give your tools an isolated workspace to run code and work with files.
Model choice: Choose the model that fits your agent.
Channels: Connect the same agent to Slack and your own applications.
Schedules: Run recurring tasks automatically, from daily reports to weekly reviews.
Configuration in code: Configure your agent and its sandbox in code, versioned with your project.

The team behind Jaccard

Founded by Vivek Patel, Charles Srisuwananukorn and Adam Goldman. We’re building the agent platform we’d want to use ourselves. Simple to start, built to scale.

Vivek Patel
Previously:
- 13 years at Yelp, Chief Product Officer
- SVP of Product at Tinder
Charles Srisuwananukorn
Previously:
- Founding VP of Engineering at Together AI
- 12 years at Apple, iOS and Siri leadership
Adam Goldman
Previously:
- CFO at Affinity
- CFO and GM at Codecademy
Ben Strong
Previously:
- VP of Technology at Airtime
- Founder of vLine
Mariya Pamnani
Previously:
- Head of Business Operations and Chief of Staff at Offline Studio