rystic

Slack, GitHub, Kalshi, PayPal, Lob, Okta, Linear, Stripe, Resendon localhost.

Test against a simulator, not the live API.

Install the CLI

A support agent that answers from real context

A question arrives by email or Slack. The agent reads Zendesk, the docs, Stripe, Linear and GitHub, then writes its reply from what it found.

  • Gmail
  • Slack
  • Zendesk
  • Stripe
  • Linear
  • GitHub

Context

Billing and code

Email

Slack

Support agent

Zendesk

Docs

Stripe

Linear

GitHub

Reply

Our simulators are…

local

Runs on your laptop or in CI, with no rate limits.

stateful

Every call sees the ones before it.

settable

Seed any state you need before the first call.

Current catalog

  • Slack
  • GitHub Pulls
  • Kalshi
  • PayPal
  • Lob
  • Okta
  • Linear
  • Stripe
  • Resend
  • Anthropic
  • Clerk
  • Dropbox
  • Gmail
  • Google Drive
  • Jira
  • Notion
  • PostHog
  • QuickBooks
  • S3
  • Shopify
  • Word
  • OpenAIsoon
  • ElevenLabssoon
  • NetSuitesoon
  • Squaresoon
  • Sentrysoon

verified daily

Before every release, the same requests go to the live API and to the simulator. This is how often they agree.

meet the team

  • Evan Whitehouse

    Evan Whitehouse

    Co-founder

    Evan came up with Rystic while building agents on Roblox’s service mesh team, previously built virtual K8s environments at LinkedIn. Former professional Magic: the Gathering player.

  • Zachary Kiihne

    Zachary Kiihne

    Co-founder

    Zachary is a former professional magic player and spent 4 years at Google working on integrating Gemini into Gmail and Google Docs.

  • “The exchange simulators they built for us have been invaluable for testing our systems, and it’s been a pleasure to work with Zach and Evan.”
    Jordan LidskyJordan Lidsky, CEO, HJBL
  • “Been using Rystic a lot for testing our Tilo OS migration assistant in CI, lets us simulate lots of services without dealing with real accounts for them. Great product.”
    Quinten WolffQuinten Wolff, CTO, Tilo

Try it now.

Install CLI