Overview
Salaries
Products
People
Growth
Offices
Financials

Funding and backers

Backers
1
Y Combinator
Momentum
0/100
no fresh signals
The story so fareach stage dated by its source: the company's releases, the press, registers, filings
Oct 2026 Went through Y Combinator
Registers and programsofficial lists and records that name the company
Legal entity Rystic, Inc. its site
Backed byfrom the funds' portfolios and accelerator catalogs
Investors in similar startupsfunds that back the companies most like this one
Similar startupsby what they do, their industry and backers
42CrunchFounded 2017
42Crunch governs the MCP servers your AI agents depend on — and the APIs behind them — using one contract-driven cycle: specify, audit…
Archal11-50 employees
Create isolated sandboxes with stateful API environments for GitHub, Slack, Stripe, and more. Test AI agents through REST or MCP, then…
HardLabs TechnologiesConvertible Note $70k · 1 mo ago • Founded 2026
Upload the schematic/netlist, BOM and firmware. HardLabs builds a simulator of your board and runs the real firmware against it.
NayaOneVenture round · 2 yr ago • Founded 2019
Discover how NayaOne helps financial institutions and enterprises discover, validate, and deliver third-party technology faster and safely.
Ice BarrelConvertible Note $175k · 3 yr ago • Founded 2022
Cold water therapy is one of the fastest, easiest, and most natural ways to reset your body and mind. Don't wait, take the plunge today…
WireMockSeed $6.5M · 3 yr ago • 11-50 employees
WireMock is a tool for building mock APIs. API mocking enables you build stable, predictable development environments when the APIs you…

Overview

Rystic builds local, stateful simulators of the third-party APIs your agents depend on — Stripe, GitHub, Kalshi — validated against the real service, and safe to reset, manipulate, and break.

Offices

Where the company hires and what each office is for
Cities
1
Hiring now
0
Countries
1
San Francisco United States
HQ